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/*******************************************************************************************/
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/** **/
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bsa |
/** COPYRIGHT (C) 2011, SYSTEMYDE INTERNATIONAL CORPORATION, ALL RIGHTS RESERVED **/
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bsa |
/** **/
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/** control module Rev 0.0 08/22/2011 **/
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/** **/
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/*******************************************************************************************/
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module control (add_sel, alua_sel, alub_sel, aluop_sel, cflg_en, di_ctl, do_ctl, ex_af_pls,
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ex_bank_pls, ex_dehl_inst, halt_nxt, hflg_ctl, ief_ctl, if_frst, inta_frst,
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imd_ctl, ld_dmaa, ld_inst, ld_inta, ld_page, ld_wait, nflg_ctl, output_inh,
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4 |
bsa |
page_sel, pc_sel, pflg_ctl, rd_frst, rd_nxt, reti_nxt, rreg_en, sflg_en, state_nxt,
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2 |
bsa |
tflg_ctl, tran_sel, wr_addr, wr_frst, zflg_en, carry_bit, dmar_reg, inst_reg,
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intr_reg, page_reg, par_bit, sign_bit, state_reg, tflg_reg, vector_int,
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xhlt_reg, zero_bit);
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input carry_bit; /* carry flag */
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input dmar_reg; /* latched dma request */
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input intr_reg; /* latched interrupt request */
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input par_bit; /* parity flag */
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input sign_bit; /* sign flag */
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input tflg_reg; /* temporary flag */
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input vector_int; /* int vector enable */
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input xhlt_reg; /* halt exit */
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input zero_bit; /* zero flag */
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input [3:0] page_reg; /* instruction decode "page" */
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input [7:0] inst_reg; /* instruction register */
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input [`STATE_IDX:0] state_reg; /* current processor state */
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output cflg_en; /* carry flag control */
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output ex_af_pls; /* exchange af,af' */
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output ex_bank_pls; /* exchange register bank */
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output ex_dehl_inst; /* exchange de,hl */
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output halt_nxt; /* halt cycle next */
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output if_frst; /* ifetch first cycle */
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output inta_frst; /* intack first cycle */
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output ld_dmaa; /* load dma request */
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output ld_inst; /* load instruction register */
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output ld_inta; /* load interrupt request */
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output ld_page; /* load page register */
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output ld_wait; /* load wait request */
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output output_inh; /* disable cpu outputs */
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output rd_frst; /* read first cycle */
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output rd_nxt; /* read cycle identifier */
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output reti_nxt; /* reti identifier */
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4 |
bsa |
output rreg_en; /* update refresh register */
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2 |
bsa |
output sflg_en; /* sign flag control */
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output wr_frst; /* write first cycle */
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output zflg_en; /* zero flag control */
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output [3:0] page_sel; /* instruction decode "page" control */
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output [`ADCTL_IDX:0] add_sel; /* address output mux control */
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output [`ALUA_IDX:0] alua_sel; /* alu input a mux control */
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output [`ALUB_IDX:0] alub_sel; /* alu input b mux control */
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output [`ALUOP_IDX:0] aluop_sel; /* alu operation control */
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output [`DI_IDX:0] di_ctl; /* data input control */
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output [`DO_IDX:0] do_ctl; /* data output control */
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output [`HFLG_IDX:0] hflg_ctl; /* half-carry flag control */
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output [`IEF_IDX:0] ief_ctl; /* interrupt enable control */
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output [`IMD_IDX:0] imd_ctl; /* interrupt mode control */
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output [`NFLG_IDX:0] nflg_ctl; /* negate flag control */
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output [`PCCTL_IDX:0] pc_sel; /* program counter source control */
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output [`PFLG_IDX:0] pflg_ctl; /* parity/overflow flag control */
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output [`STATE_IDX:0] state_nxt; /* next processor state */
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output [`TFLG_IDX:0] tflg_ctl; /* temp flag control */
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output [`TTYPE_IDX:0] tran_sel; /* transaction type select */
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output [`WREG_IDX:0] wr_addr; /* register write address bus */
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/*****************************************************************************************/
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/* */
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/* signal declarations */
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/* */
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/*****************************************************************************************/
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reg cflg_en; /* carry flag control */
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reg ex_af_pls; /* exchange af,af' */
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reg ex_bank_pls; /* exchange register bank */
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reg ex_dehl_inst; /* exchange de,hl */
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reg halt_nxt; /* halt transaction */
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reg if_frst; /* first clock if ifetch */
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reg inta_frst; /* first clock of intack */
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reg ld_inst; /* load instruction register */
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reg ld_inta; /* sample latched int */
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reg ld_dmaa; /* sample latched dma */
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reg ld_page; /* load page register */
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reg ld_wait; /* sample wait input */
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reg output_inh; /* disable cpu outputs */
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reg rd_frst; /* first clock of read */
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reg rd_nxt; /* read trans next */
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4 |
bsa |
reg reti_nxt; /* reti trans next */
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`ifdef RREG_EMU
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reg rreg_en; /* update refresh register */
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`endif
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2 |
bsa |
reg sflg_en; /* sign flag control */
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reg wr_frst; /* first clock of write */
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reg zflg_en; /* zero flag control */
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reg [3:0] page_sel; /* inst decode page control */
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reg [`ADCTL_IDX:0] add_sel; /* address output mux control */
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reg [`ALUA_IDX:0] alua_sel; /* alu input a mux control */
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reg [`ALUB_IDX:0] alub_sel; /* alu input b mux control */
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reg [`ALUOP_IDX:0] aluop_sel; /* alu operation control */
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reg [`DI_IDX:0] di_ctl; /* data input control */
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reg [`DO_IDX:0] do_ctl; /* data output control */
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reg [`HFLG_IDX:0] hflg_ctl; /* half-carry flag control */
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reg [`IEF_IDX:0] ief_ctl; /* interrupt enable control */
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reg [`IMD_IDX:0] imd_ctl; /* interrupt mode control */
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| 103 |
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reg [`NFLG_IDX:0] nflg_ctl; /* negate flag control */
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reg [`PCCTL_IDX:0] pc_sel; /* pc source control */
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reg [`PFLG_IDX:0] pflg_ctl; /* parity/overflow flag control */
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reg [`STATE_IDX:0] state_nxt; /* machine state */
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| 107 |
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reg [`TFLG_IDX:0] tflg_ctl; /* temp flag control */
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| 108 |
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reg [`TTYPE_IDX:0] tran_sel; /* transaction type */
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reg [`WREG_IDX:0] wr_addr; /* register write address bus */
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| 110 |
4 |
bsa |
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/*****************************************************************************************/
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/* */
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/* refresh register control */
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/* */
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/*****************************************************************************************/
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`ifdef RREG_EMU
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always @ (inst_reg or page_reg or state_reg or dmar_reg) begin
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casex (state_reg) //sysnopsys parallel_case
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`IF1B,
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`IF2B,
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`IF3B: rreg_en = 1'b1;
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`WR1B,
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`WR2B: begin
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casex ({page_reg, inst_reg}) //sysnopsys parallel_case
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12'b1xxx10111001,
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12'b1xxx10110001,
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12'b1xxx10111010,
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12'b1xxx10110010,
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12'b1xxx10111000,
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12'b1xxx10110000,
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12'b1xxx10111011,
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12'b1xxx10110011,
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12'b0001xxxxxxxx: rreg_en = 1'b1;
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default: rreg_en = 1'b0;
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endcase
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end
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default: rreg_en = 1'b0;
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endcase
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end
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`endif
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2 |
bsa |
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/*****************************************************************************************/
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/* */
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/* exchange instruction control */
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/* */
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/*****************************************************************************************/
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always @ (inst_reg or page_reg or state_reg) begin
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casex (state_reg)
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`IF1B: begin
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case ({page_reg, inst_reg})
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12'b000000001000: ex_af_pls = 1'b1;
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default: ex_af_pls = 1'b0;
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endcase
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end
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default: ex_af_pls = 1'b0;
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endcase
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end
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always @ (inst_reg or page_reg or state_reg) begin
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| 160 |
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casex (state_reg)
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`IF1B: begin
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case ({page_reg, inst_reg})
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12'b000011011001: ex_bank_pls = 1'b1;
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default: ex_bank_pls = 1'b0;
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endcase
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end
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default: ex_bank_pls = 1'b0;
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endcase
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end
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| 171 |
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always @ (inst_reg or page_reg or state_reg) begin
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| 172 |
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casex (state_reg)
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`DEC1: begin
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case (inst_reg)
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8'b11101011: ex_dehl_inst = 1'b1;
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default: ex_dehl_inst = 1'b0;
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endcase
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| 178 |
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end
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default: ex_dehl_inst = 1'b0;
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endcase
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end
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| 182 |
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| 183 |
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/*****************************************************************************************/
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| 184 |
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/* */
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| 185 |
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/* interrupt control */
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| 186 |
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/* */
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| 187 |
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/*****************************************************************************************/
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| 188 |
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always @ (inst_reg or page_reg or state_reg) begin
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| 189 |
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casex (state_reg)
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`IF1B: begin
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casex ({page_reg, inst_reg})
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12'b000011110011: ief_ctl = `IEF_0;
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12'b000011111011: ief_ctl = `IEF_1;
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12'b0001xxxxxxxx: ief_ctl = `IEF_NMI;
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12'b1xxx01000101: ief_ctl = `IEF_RTN;
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default: ief_ctl = `IEF_NUL;
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endcase
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end
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default: ief_ctl = `IEF_NUL;
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endcase
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end
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| 203 |
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always @ (inst_reg or page_reg or state_reg) begin
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| 204 |
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casex (state_reg)
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`IF1B: begin
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| 206 |
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casex ({page_reg, inst_reg})
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12'b1xxx01000110: imd_ctl = `IMD_0;
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12'b1xxx01010110: imd_ctl = `IMD_1;
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12'b1xxx01011110: imd_ctl = `IMD_2;
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| 210 |
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default: imd_ctl = `IMD_NUL;
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| 211 |
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endcase
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| 212 |
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end
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| 213 |
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default: imd_ctl = `IMD_NUL;
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| 214 |
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endcase
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| 215 |
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end
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| 216 |
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| 217 |
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/*****************************************************************************************/
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| 218 |
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/* */
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| 219 |
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/* identifiers to create timing signals */
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| 220 |
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/* */
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| 221 |
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/*****************************************************************************************/
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| 222 |
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always @ (state_reg) begin
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| 223 |
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casex (state_reg) //synopsys parallel_case
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| 224 |
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`DEC1,
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| 225 |
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`DEC2,
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| 226 |
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`OF2A,
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| 227 |
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`IF3A,
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| 228 |
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`IF1A: if_frst = 1'b1;
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| 229 |
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default: if_frst = 1'b0;
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| 230 |
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endcase
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| 231 |
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end
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| 232 |
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| 233 |
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always @ (state_reg) begin
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| 234 |
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casex (state_reg) //synopsys parallel_case
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| 235 |
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`INTA,
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| 236 |
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`RSTE: inta_frst = 1'b1;
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| 237 |
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default: inta_frst = 1'b0;
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| 238 |
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endcase
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| 239 |
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end
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| 240 |
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| 241 |
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always @ (inst_reg or page_reg or state_nxt) begin
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| 242 |
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casex (state_nxt) //synopsys parallel_case
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| 243 |
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`RD1A,
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| 244 |
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`RD2A: rd_nxt = 1'b1;
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| 245 |
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default: rd_nxt = 1'b0;
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| 246 |
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endcase
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| 247 |
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end
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| 248 |
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|
| 249 |
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always @ (inst_reg or page_reg or state_reg) begin
|
| 250 |
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casex (state_reg) //synopsys parallel_case
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| 251 |
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`RD1A,
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| 252 |
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`RD2A: rd_frst = 1'b1;
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| 253 |
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default: rd_frst = 1'b0;
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| 254 |
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endcase
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| 255 |
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end
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| 256 |
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| 257 |
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always @ (state_reg) begin
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| 258 |
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casex (state_reg) //synopsys parallel_case
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| 259 |
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`WR1A,
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| 260 |
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`WR2A: wr_frst = 1'b1;
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| 261 |
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default: wr_frst = 1'b0;
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| 262 |
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endcase
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| 263 |
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end
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| 264 |
|
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| 265 |
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/*****************************************************************************************/
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| 266 |
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/* */
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| 267 |
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/* wait sample */
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| 268 |
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/* */
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| 269 |
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/*****************************************************************************************/
|
| 270 |
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always @ (inst_reg or page_reg or state_reg or carry_bit or par_bit or
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| 271 |
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sign_bit or zero_bit) begin
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| 272 |
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casex (state_reg) //synopsys parallel_case
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| 273 |
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`DEC1: begin
|
| 274 |
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casex (inst_reg) //synopsys parallel_case
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| 275 |
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8'b00000010,
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| 276 |
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8'b00001010,
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| 277 |
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8'b00010010,
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| 278 |
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8'b00011010,
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| 279 |
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8'b00110100,
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| 280 |
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8'b00110101,
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| 281 |
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8'b011100xx,
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| 282 |
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8'b0111010x,
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| 283 |
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8'b01110111,
|
| 284 |
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8'b010xx110,
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| 285 |
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8'b0110x110,
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| 286 |
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8'b01111110,
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| 287 |
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8'b10000110,
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| 288 |
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8'b10001110,
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| 289 |
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8'b10010110,
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| 290 |
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8'b10011110,
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| 291 |
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8'b10100110,
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| 292 |
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8'b10101110,
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| 293 |
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8'b10110110,
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| 294 |
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8'b10111110,
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| 295 |
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8'b11001001,
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| 296 |
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8'b11100011,
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| 297 |
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8'b11xx0001,
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| 298 |
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8'b11xx0101,
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| 299 |
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8'b11xxx111,
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| 300 |
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8'b01110110,
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| 301 |
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8'b11101001: ld_wait = 1'b0;
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| 302 |
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8'b11000000: ld_wait = zero_bit;
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| 303 |
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8'b11001000: ld_wait = !zero_bit;
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| 304 |
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8'b11010000: ld_wait = carry_bit;
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| 305 |
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8'b11011000: ld_wait = !carry_bit;
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| 306 |
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8'b11100000: ld_wait = par_bit;
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| 307 |
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8'b11101000: ld_wait = !par_bit;
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| 308 |
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8'b11110000: ld_wait = sign_bit;
|
| 309 |
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8'b11111000: ld_wait = !sign_bit;
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| 310 |
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default: ld_wait = 1'b1;
|
| 311 |
|
|
endcase
|
| 312 |
|
|
end
|
| 313 |
|
|
`DEC2: begin
|
| 314 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 315 |
|
|
12'b0010xxxxx110,
|
| 316 |
|
|
12'b010x11100001,
|
| 317 |
|
|
12'b010x11100011,
|
| 318 |
|
|
12'b010x11100101,
|
| 319 |
|
|
12'b1xxx0100x101,
|
| 320 |
|
|
12'b1xxx0110x111,
|
| 321 |
|
|
12'b1xxx01xxx00x,
|
| 322 |
|
|
12'b1xxx101xx0xx,
|
| 323 |
|
|
12'b010x11101001: ld_wait = 1'b0;
|
| 324 |
|
|
default: ld_wait = 1'b1;
|
| 325 |
|
|
endcase
|
| 326 |
|
|
end
|
| 327 |
|
|
`OF2A,
|
| 328 |
|
|
`IF3A,
|
| 329 |
|
|
`RD1A,
|
| 330 |
|
|
`RD2A,
|
| 331 |
|
|
`WR1A,
|
| 332 |
|
|
`WR2A,
|
| 333 |
|
|
`IF1A,
|
| 334 |
|
|
`INTA: ld_wait = 1'b1;
|
| 335 |
|
|
default: ld_wait = 1'b0;
|
| 336 |
|
|
endcase
|
| 337 |
|
|
end
|
| 338 |
|
|
|
| 339 |
|
|
/*****************************************************************************************/
|
| 340 |
|
|
/* */
|
| 341 |
|
|
/* instruction register and page register control */
|
| 342 |
|
|
/* */
|
| 343 |
|
|
/*****************************************************************************************/
|
| 344 |
|
|
always @ (inst_reg or page_reg or state_reg) begin
|
| 345 |
|
|
casex (state_reg) //synopsys parallel_case
|
| 346 |
|
|
`IF2B,
|
| 347 |
|
|
`IF3B,
|
| 348 |
|
|
`IF1B: ld_inst = 1'b1;
|
| 349 |
|
|
default: ld_inst = 1'b0;
|
| 350 |
|
|
endcase
|
| 351 |
|
|
end
|
| 352 |
|
|
|
| 353 |
|
|
always @ (inst_reg or page_reg or state_reg) begin
|
| 354 |
|
|
casex (state_reg)
|
| 355 |
|
|
`DEC1: begin
|
| 356 |
|
|
case (inst_reg)
|
| 357 |
|
|
8'b11001011: page_sel = `CB_PAGE;
|
| 358 |
|
|
8'b11011101: page_sel = `DD_PAGE;
|
| 359 |
|
|
8'b11101101: page_sel = `ED_PAGE;
|
| 360 |
|
|
8'b11111101: page_sel = `FD_PAGE;
|
| 361 |
|
|
default: page_sel = `MAIN_PG;
|
| 362 |
|
|
endcase
|
| 363 |
|
|
end
|
| 364 |
|
|
`DEC2: begin
|
| 365 |
|
|
casex ({page_reg, inst_reg})
|
| 366 |
|
|
12'bx10011001011: page_sel = `DDCB_PG;
|
| 367 |
|
|
12'bx10111001011: page_sel = `FDCB_PG;
|
| 368 |
|
|
default: page_sel = `MAIN_PG;
|
| 369 |
|
|
endcase
|
| 370 |
|
|
end
|
| 371 |
|
|
`INTA: page_sel = `INTR_PG;
|
| 372 |
|
|
`DMA1: page_sel = `DMA_PG;
|
| 373 |
|
|
default: page_sel = `MAIN_PG;
|
| 374 |
|
|
endcase
|
| 375 |
|
|
end
|
| 376 |
|
|
|
| 377 |
|
|
always @ (inst_reg or page_reg or state_reg) begin
|
| 378 |
|
|
casex (state_reg) //synopsys parallel_case
|
| 379 |
|
|
`DEC1: ld_page = 1'b1;
|
| 380 |
|
|
`DEC2: begin
|
| 381 |
|
|
casex ({page_reg, inst_reg})
|
| 382 |
|
|
12'bx10x11001011: ld_page = 1'b1;
|
| 383 |
|
|
default: ld_page = 1'b0;
|
| 384 |
|
|
endcase
|
| 385 |
|
|
end
|
| 386 |
|
|
`INTA,
|
| 387 |
|
|
`DMA1: ld_page = 1'b1;
|
| 388 |
|
|
default: ld_page = 1'b0;
|
| 389 |
|
|
endcase
|
| 390 |
|
|
end
|
| 391 |
|
|
|
| 392 |
|
|
/*****************************************************************************************/
|
| 393 |
|
|
/* */
|
| 394 |
|
|
/* next state control */
|
| 395 |
|
|
/* */
|
| 396 |
|
|
/*****************************************************************************************/
|
| 397 |
|
|
always @ (inst_reg or page_reg or state_reg or carry_bit or dmar_reg or intr_reg or
|
| 398 |
|
|
par_bit or sign_bit or tflg_reg or vector_int or xhlt_reg or zero_bit) begin
|
| 399 |
|
|
casex (state_reg) //synopsys parallel_case
|
| 400 |
|
|
`DEC1: begin
|
| 401 |
|
|
casex (inst_reg) //synopsys parallel_case
|
| 402 |
|
|
8'b00000010,
|
| 403 |
|
|
8'b00001010,
|
| 404 |
|
|
8'b00010010,
|
| 405 |
|
|
8'b00011010,
|
| 406 |
|
|
8'b00110100,
|
| 407 |
|
|
8'b00110101,
|
| 408 |
|
|
8'b011100xx,
|
| 409 |
|
|
8'b0111010x,
|
| 410 |
|
|
8'b01110111,
|
| 411 |
|
|
8'b010xx110,
|
| 412 |
|
|
8'b0110x110,
|
| 413 |
|
|
8'b01111110,
|
| 414 |
|
|
8'b10000110,
|
| 415 |
|
|
8'b10001110,
|
| 416 |
|
|
8'b10010110,
|
| 417 |
|
|
8'b10011110,
|
| 418 |
|
|
8'b10100110,
|
| 419 |
|
|
8'b10101110,
|
| 420 |
|
|
8'b10110110,
|
| 421 |
|
|
8'b10111110,
|
| 422 |
|
|
8'b11001001,
|
| 423 |
|
|
8'b11100011,
|
| 424 |
|
|
8'b11xx0001,
|
| 425 |
|
|
8'b11xx0101,
|
| 426 |
|
|
8'b11xxx111: state_nxt = `sADR2;
|
| 427 |
|
|
8'b11000000: state_nxt = ( !zero_bit) ? `sADR2 : `sIF1B;
|
| 428 |
|
|
8'b11001000: state_nxt = ( zero_bit) ? `sADR2 : `sIF1B;
|
| 429 |
|
|
8'b11010000: state_nxt = (!carry_bit) ? `sADR2 : `sIF1B;
|
| 430 |
|
|
8'b11011000: state_nxt = ( carry_bit) ? `sADR2 : `sIF1B;
|
| 431 |
|
|
8'b11100000: state_nxt = ( !par_bit) ? `sADR2 : `sIF1B;
|
| 432 |
|
|
8'b11101000: state_nxt = ( par_bit) ? `sADR2 : `sIF1B;
|
| 433 |
|
|
8'b11110000: state_nxt = ( !sign_bit) ? `sADR2 : `sIF1B;
|
| 434 |
|
|
8'b11111000: state_nxt = ( sign_bit) ? `sADR2 : `sIF1B;
|
| 435 |
|
|
8'b11001011,
|
| 436 |
|
|
8'b11011101,
|
| 437 |
|
|
8'b11101101,
|
| 438 |
|
|
8'b11111101: state_nxt = `sIF2B;
|
| 439 |
|
|
8'b00010000,
|
| 440 |
|
|
8'b00011000,
|
| 441 |
|
|
8'b00100010,
|
| 442 |
|
|
8'b00101010,
|
| 443 |
|
|
8'b00110010,
|
| 444 |
|
|
8'b00111010,
|
| 445 |
|
|
8'b001xx000,
|
| 446 |
|
|
8'b00xx0001,
|
| 447 |
|
|
8'b00xxx110,
|
| 448 |
|
|
8'b11000011,
|
| 449 |
|
|
8'b11000110,
|
| 450 |
|
|
8'b11001101,
|
| 451 |
|
|
8'b11001110,
|
| 452 |
|
|
8'b11010011,
|
| 453 |
|
|
8'b11010110,
|
| 454 |
|
|
8'b11011011,
|
| 455 |
|
|
8'b11011110,
|
| 456 |
|
|
8'b11100110,
|
| 457 |
|
|
8'b11101110,
|
| 458 |
|
|
8'b11110110,
|
| 459 |
|
|
8'b11111110,
|
| 460 |
|
|
8'b11xxx010,
|
| 461 |
|
|
8'b11xxx100: state_nxt = `sOF1B;
|
| 462 |
|
|
8'b01110110,
|
| 463 |
|
|
8'b11101001: state_nxt = `sPCO;
|
| 464 |
|
|
default: state_nxt = `sIF1B;
|
| 465 |
|
|
endcase
|
| 466 |
|
|
end
|
| 467 |
|
|
`IF2B: state_nxt = `sDEC2;
|
| 468 |
|
|
`DEC2: begin
|
| 469 |
4 |
bsa |
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 470 |
|
|
12'b001000110110,
|
| 471 |
2 |
bsa |
12'b001000000110,
|
| 472 |
|
|
12'b001000001110,
|
| 473 |
|
|
12'b001000010110,
|
| 474 |
|
|
12'b001000011110,
|
| 475 |
|
|
12'b001000100110,
|
| 476 |
|
|
12'b001000101110,
|
| 477 |
|
|
12'b001000111110,
|
| 478 |
|
|
12'b001001xxx110,
|
| 479 |
|
|
12'b001010xxx110,
|
| 480 |
|
|
12'b001011xxx110,
|
| 481 |
|
|
12'b010011100001,
|
| 482 |
|
|
12'b010011100011,
|
| 483 |
|
|
12'b010011100101,
|
| 484 |
|
|
12'b010111100001,
|
| 485 |
|
|
12'b010111100011,
|
| 486 |
|
|
12'b010111100101,
|
| 487 |
|
|
12'b1xxx01000101,
|
| 488 |
|
|
12'b1xxx01001101,
|
| 489 |
|
|
12'b1xxx01100111,
|
| 490 |
|
|
12'b1xxx01101111,
|
| 491 |
|
|
12'b1xxx01xxx000,
|
| 492 |
|
|
12'b1xxx01xxx001,
|
| 493 |
|
|
12'b1xxx10100000,
|
| 494 |
|
|
12'b1xxx10100001,
|
| 495 |
|
|
12'b1xxx10100010,
|
| 496 |
|
|
12'b1xxx10100011,
|
| 497 |
|
|
12'b1xxx10101000,
|
| 498 |
|
|
12'b1xxx10101001,
|
| 499 |
|
|
12'b1xxx10101010,
|
| 500 |
|
|
12'b1xxx10101011,
|
| 501 |
|
|
12'b1xxx10110000,
|
| 502 |
|
|
12'b1xxx10110001,
|
| 503 |
|
|
12'b1xxx10110010,
|
| 504 |
|
|
12'b1xxx10110011,
|
| 505 |
|
|
12'b1xxx10111000,
|
| 506 |
|
|
12'b1xxx10111001,
|
| 507 |
|
|
12'b1xxx10111010,
|
| 508 |
4 |
bsa |
12'b1xxx10111011: state_nxt = `sADR2;
|
| 509 |
|
|
12'b010010001100,
|
| 510 |
|
|
12'b010010001101,
|
| 511 |
|
|
12'b010110001100,
|
| 512 |
|
|
12'b010110001101,
|
| 513 |
|
|
12'b010010000100,
|
| 514 |
|
|
12'b010010000101,
|
| 515 |
|
|
12'b010110000100,
|
| 516 |
|
|
12'b010110000101,
|
| 517 |
|
|
12'b010010100100,
|
| 518 |
|
|
12'b010010100101,
|
| 519 |
|
|
12'b010110100100,
|
| 520 |
|
|
12'b010110100101,
|
| 521 |
|
|
12'b010010111100,
|
| 522 |
|
|
12'b010010111101,
|
| 523 |
|
|
12'b010110111100,
|
| 524 |
|
|
12'b010110111101,
|
| 525 |
|
|
12'b010000100101,
|
| 526 |
|
|
12'b010000101101,
|
| 527 |
|
|
12'b010100100101,
|
| 528 |
|
|
12'b010100101101,
|
| 529 |
|
|
12'b010000100100,
|
| 530 |
|
|
12'b010000101100,
|
| 531 |
|
|
12'b010100100100,
|
| 532 |
|
|
12'b010100101100,
|
| 533 |
|
|
12'b0100011000xx,12'b01000110010x,12'b010001100111,
|
| 534 |
|
|
12'b0100011010xx,12'b01000110110x,12'b010001101111,
|
| 535 |
|
|
12'b0101011000xx,12'b01010110010x,12'b010101100111,
|
| 536 |
|
|
12'b0101011010xx,12'b01010110110x,12'b010101101111,
|
| 537 |
|
|
12'b0100010xx100,12'b01000110x100,12'b010001111100,
|
| 538 |
|
|
12'b0100010xx101,12'b01000110x101,12'b010001111101,
|
| 539 |
|
|
12'b0101010xx100,12'b01010110x100,12'b010101111100,
|
| 540 |
|
|
12'b0101010xx101,12'b01010110x101,12'b010101111101,
|
| 541 |
|
|
12'b010010110100,
|
| 542 |
|
|
12'b010010110101,
|
| 543 |
|
|
12'b010110110100,
|
| 544 |
|
|
12'b010110110101,
|
| 545 |
|
|
12'b010010011100,
|
| 546 |
|
|
12'b010010011101,
|
| 547 |
|
|
12'b010110011100,
|
| 548 |
|
|
12'b010110011101,
|
| 549 |
|
|
12'b010010010100,
|
| 550 |
|
|
12'b010010010101,
|
| 551 |
|
|
12'b010110010100,
|
| 552 |
|
|
12'b010110010101,
|
| 553 |
|
|
12'b010010101100,
|
| 554 |
|
|
12'b010010101101,
|
| 555 |
|
|
12'b010110101100,
|
| 556 |
|
|
12'b010110101101,
|
| 557 |
|
|
12'b001000110xxx,
|
| 558 |
2 |
bsa |
12'b001000000xxx,
|
| 559 |
|
|
12'b001000001xxx,
|
| 560 |
|
|
12'b001000010xxx,
|
| 561 |
|
|
12'b001000011xxx,
|
| 562 |
|
|
12'b001000100xxx,
|
| 563 |
|
|
12'b001000101xxx,
|
| 564 |
|
|
12'b001000111xxx,
|
| 565 |
|
|
12'b001001xxxxxx,
|
| 566 |
|
|
12'b001010xxxxxx,
|
| 567 |
|
|
12'b001011xxxxxx,
|
| 568 |
|
|
12'b010000100011,
|
| 569 |
|
|
12'b010000101011,
|
| 570 |
|
|
12'b010000xx1001,
|
| 571 |
|
|
12'b010011111001,
|
| 572 |
|
|
12'b010100100011,
|
| 573 |
|
|
12'b010100101011,
|
| 574 |
|
|
12'b010100xx1001,
|
| 575 |
|
|
12'b010111111001,
|
| 576 |
|
|
12'b1xxx01000100,
|
| 577 |
|
|
12'b1xxx01000110,
|
| 578 |
|
|
12'b1xxx01000111,
|
| 579 |
|
|
12'b1xxx01001111,
|
| 580 |
|
|
12'b1xxx01010110,
|
| 581 |
|
|
12'b1xxx01010111,
|
| 582 |
|
|
12'b1xxx01011110,
|
| 583 |
|
|
12'b1xxx01011111,
|
| 584 |
|
|
12'b1xxx01xx0010,
|
| 585 |
|
|
12'b1xxx01xx1010: state_nxt = `sIF1B;
|
| 586 |
|
|
12'b010011101001,
|
| 587 |
|
|
12'b010111101001: state_nxt = `sPCO;
|
| 588 |
|
|
default: state_nxt = `sOF1B;
|
| 589 |
|
|
endcase
|
| 590 |
|
|
end
|
| 591 |
|
|
`OF1B: begin
|
| 592 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 593 |
|
|
12'b000011010011,
|
| 594 |
|
|
12'b000011011011,
|
| 595 |
|
|
12'b010000110100,
|
| 596 |
|
|
12'b010000110101,
|
| 597 |
|
|
12'b010001110xxx,
|
| 598 |
|
|
12'b010001xxx110,
|
| 599 |
|
|
12'b010010000110,
|
| 600 |
|
|
12'b010010001110,
|
| 601 |
|
|
12'b010010010110,
|
| 602 |
|
|
12'b010010011110,
|
| 603 |
|
|
12'b010010100110,
|
| 604 |
|
|
12'b010010101110,
|
| 605 |
|
|
12'b010010110110,
|
| 606 |
|
|
12'b010010111110,
|
| 607 |
|
|
12'b010100110100,
|
| 608 |
|
|
12'b010100110101,
|
| 609 |
|
|
12'b010101110xxx,
|
| 610 |
|
|
12'b010101xxx110,
|
| 611 |
|
|
12'b010110000110,
|
| 612 |
|
|
12'b010110001110,
|
| 613 |
|
|
12'b010110010110,
|
| 614 |
|
|
12'b010110011110,
|
| 615 |
|
|
12'b010110100110,
|
| 616 |
|
|
12'b010110101110,
|
| 617 |
|
|
12'b010110110110,
|
| 618 |
4 |
bsa |
12'b010110111110: state_nxt = `sADR1;
|
| 619 |
|
|
12'b010000100110,
|
| 620 |
|
|
12'b010000101110,
|
| 621 |
|
|
12'b010100100110,
|
| 622 |
|
|
12'b010100101110,
|
| 623 |
|
|
12'b0000000xx110,12'b00000010x110,12'b000000111110,
|
| 624 |
2 |
bsa |
12'b000011000110,
|
| 625 |
|
|
12'b000011001110,
|
| 626 |
|
|
12'b000011010110,
|
| 627 |
|
|
12'b000011011110,
|
| 628 |
|
|
12'b000011100110,
|
| 629 |
|
|
12'b000011101110,
|
| 630 |
|
|
12'b000011110110,
|
| 631 |
|
|
12'b000011111110: state_nxt = `sIF1A;
|
| 632 |
|
|
12'b000000100000: state_nxt = ( !zero_bit) ? `sPCA : `sIF1A;
|
| 633 |
|
|
12'b000000101000: state_nxt = ( zero_bit) ? `sPCA : `sIF1A;
|
| 634 |
|
|
12'b000000110000: state_nxt = (!carry_bit) ? `sPCA : `sIF1A;
|
| 635 |
|
|
12'b000000111000: state_nxt = ( carry_bit) ? `sPCA : `sIF1A;
|
| 636 |
|
|
12'b000000100010,
|
| 637 |
|
|
12'b000000101010,
|
| 638 |
|
|
12'b000000110010,
|
| 639 |
|
|
12'b000000111010,
|
| 640 |
|
|
12'b000000xx0001,
|
| 641 |
|
|
12'b000011000011,
|
| 642 |
|
|
12'b000011001101,
|
| 643 |
|
|
12'b000011xxx010,
|
| 644 |
|
|
12'b000011xxx100,
|
| 645 |
|
|
12'b010000100001,
|
| 646 |
|
|
12'b010000100010,
|
| 647 |
|
|
12'b010000101010,
|
| 648 |
|
|
12'b010000110110,
|
| 649 |
|
|
12'b010100100001,
|
| 650 |
|
|
12'b010100100010,
|
| 651 |
|
|
12'b010100101010,
|
| 652 |
|
|
12'b010100110110,
|
| 653 |
|
|
12'b1xxx01xx0011,
|
| 654 |
|
|
12'b1xxx01xx1011: state_nxt = `sOF2A;
|
| 655 |
|
|
12'b000000010000,
|
| 656 |
|
|
12'b000000011000: state_nxt = `sPCA;
|
| 657 |
|
|
12'b000000110110: state_nxt = `sWR2A;
|
| 658 |
|
|
default: state_nxt = `sIF3A;
|
| 659 |
|
|
endcase
|
| 660 |
|
|
end
|
| 661 |
|
|
`OF2A: state_nxt = `sOF2B;
|
| 662 |
|
|
`OF2B: begin
|
| 663 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 664 |
|
|
12'b000000xx0001,
|
| 665 |
|
|
12'b010000100001,
|
| 666 |
|
|
12'b010100100001: state_nxt = `sIF1A;
|
| 667 |
|
|
12'b000011000010: state_nxt = ( !zero_bit) ? `sPCA : `sIF1A;
|
| 668 |
|
|
12'b000011001010: state_nxt = ( zero_bit) ? `sPCA : `sIF1A;
|
| 669 |
|
|
12'b000011010010: state_nxt = (!carry_bit) ? `sPCA : `sIF1A;
|
| 670 |
|
|
12'b000011011010: state_nxt = ( carry_bit) ? `sPCA : `sIF1A;
|
| 671 |
|
|
12'b000011100010: state_nxt = ( !par_bit) ? `sPCA : `sIF1A;
|
| 672 |
|
|
12'b000011101010: state_nxt = ( par_bit) ? `sPCA : `sIF1A;
|
| 673 |
|
|
12'b000011110010: state_nxt = ( !sign_bit) ? `sPCA : `sIF1A;
|
| 674 |
|
|
12'b000011111010: state_nxt = ( sign_bit) ? `sPCA : `sIF1A;
|
| 675 |
|
|
12'b000011000100: state_nxt = ( !zero_bit) ? `sWR1A : `sIF1A;
|
| 676 |
|
|
12'b000011001100: state_nxt = ( zero_bit) ? `sWR1A : `sIF1A;
|
| 677 |
|
|
12'b000011010100: state_nxt = (!carry_bit) ? `sWR1A : `sIF1A;
|
| 678 |
|
|
12'b000011011100: state_nxt = ( carry_bit) ? `sWR1A : `sIF1A;
|
| 679 |
|
|
12'b000011100100: state_nxt = ( !par_bit) ? `sWR1A : `sIF1A;
|
| 680 |
|
|
12'b000011101100: state_nxt = ( par_bit) ? `sWR1A : `sIF1A;
|
| 681 |
|
|
12'b000011110100: state_nxt = ( !sign_bit) ? `sWR1A : `sIF1A;
|
| 682 |
|
|
12'b000011111100: state_nxt = ( sign_bit) ? `sWR1A : `sIF1A;
|
| 683 |
|
|
12'b000011000011: state_nxt = `sPCA;
|
| 684 |
|
|
12'b000011001101: state_nxt = `sWR1A;
|
| 685 |
|
|
12'b010000110110,
|
| 686 |
|
|
12'b010100110110: state_nxt = `sWR2A;
|
| 687 |
|
|
default: state_nxt = `sADR1;
|
| 688 |
|
|
endcase
|
| 689 |
|
|
end
|
| 690 |
|
|
`IF3A: state_nxt = `sIF3B;
|
| 691 |
|
|
`IF3B: state_nxt = `sRD2A;
|
| 692 |
|
|
`ADR1: state_nxt = `sADR2;
|
| 693 |
|
|
`ADR2: begin
|
| 694 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 695 |
|
|
12'b000000101010,
|
| 696 |
|
|
12'b000011001001,
|
| 697 |
|
|
12'b000011100011,
|
| 698 |
|
|
12'b000011xxx000,
|
| 699 |
|
|
12'b000011xx0001,
|
| 700 |
|
|
12'b0001xxxxxxxx,
|
| 701 |
|
|
12'b010000101010,
|
| 702 |
|
|
12'b010011100001,
|
| 703 |
|
|
12'b010011100011,
|
| 704 |
|
|
12'b010100101010,
|
| 705 |
|
|
12'b010111100001,
|
| 706 |
|
|
12'b010111100011,
|
| 707 |
|
|
12'b1xxx01000101,
|
| 708 |
|
|
12'b1xxx01001101,
|
| 709 |
|
|
12'b1xxx01xx1011,
|
| 710 |
|
|
12'b1xxx10100000,
|
| 711 |
|
|
12'b1xxx10100001,
|
| 712 |
|
|
12'b1xxx10100010,
|
| 713 |
|
|
12'b1xxx10100011,
|
| 714 |
|
|
12'b1xxx10101000,
|
| 715 |
|
|
12'b1xxx10101001,
|
| 716 |
|
|
12'b1xxx10101010,
|
| 717 |
|
|
12'b1xxx10101011,
|
| 718 |
|
|
12'b1xxx10110000,
|
| 719 |
|
|
12'b1xxx10110001,
|
| 720 |
|
|
12'b1xxx10110010,
|
| 721 |
|
|
12'b1xxx10110011,
|
| 722 |
|
|
12'b1xxx10111000,
|
| 723 |
|
|
12'b1xxx10111001,
|
| 724 |
|
|
12'b1xxx10111010,
|
| 725 |
|
|
12'b1xxx10111011: state_nxt = `sRD1A;
|
| 726 |
|
|
12'b000000100010,
|
| 727 |
|
|
12'b000011xxx111,
|
| 728 |
|
|
12'b000011xx0101,
|
| 729 |
|
|
12'b010000100010,
|
| 730 |
|
|
12'b010011100101,
|
| 731 |
|
|
12'b010100100010,
|
| 732 |
|
|
12'b010111100101,
|
| 733 |
|
|
12'b1xxx01xx0011: state_nxt = `sWR1A;
|
| 734 |
|
|
12'b000000000010,
|
| 735 |
|
|
12'b000000010010,
|
| 736 |
|
|
12'b000000110010,
|
| 737 |
|
|
12'b000001110xxx,
|
| 738 |
|
|
12'b000011010011,
|
| 739 |
|
|
12'b010001110xxx,
|
| 740 |
|
|
12'b010101110xxx,
|
| 741 |
|
|
12'b1xxx01xxx001: state_nxt = `sWR2A;
|
| 742 |
|
|
default: state_nxt = `sRD2A;
|
| 743 |
|
|
endcase
|
| 744 |
|
|
end
|
| 745 |
|
|
`RD1A: state_nxt = `sRD1B;
|
| 746 |
|
|
`RD1B: begin
|
| 747 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 748 |
|
|
12'b1xxx10100001,
|
| 749 |
|
|
12'b1xxx10101001,
|
| 750 |
|
|
12'b1xxx10110001,
|
| 751 |
|
|
12'b1xxx10111001: state_nxt = `sBLK1;
|
| 752 |
|
|
12'b1xxx10100000,
|
| 753 |
|
|
12'b1xxx10100010,
|
| 754 |
|
|
12'b1xxx10100011,
|
| 755 |
|
|
12'b1xxx10101000,
|
| 756 |
|
|
12'b1xxx10101010,
|
| 757 |
|
|
12'b1xxx10101011,
|
| 758 |
|
|
12'b1xxx10110000,
|
| 759 |
|
|
12'b1xxx10110010,
|
| 760 |
|
|
12'b1xxx10110011,
|
| 761 |
|
|
12'b1xxx10111000,
|
| 762 |
|
|
12'b1xxx10111010,
|
| 763 |
|
|
12'b1xxx10111011: state_nxt = `sWR1A;
|
| 764 |
|
|
default: state_nxt = `sRD2A;
|
| 765 |
|
|
endcase
|
| 766 |
|
|
end
|
| 767 |
|
|
`RD2A: state_nxt = `sRD2B;
|
| 768 |
|
|
`RD2B: begin
|
| 769 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 770 |
|
|
12'b1xxx10100001,
|
| 771 |
|
|
12'b1xxx10101001,
|
| 772 |
|
|
12'b1xxx10110001,
|
| 773 |
|
|
12'b1xxx10111001: state_nxt = `sBLK1;
|
| 774 |
|
|
12'b000000001010,
|
| 775 |
|
|
12'b000000011010,
|
| 776 |
|
|
12'b000000101010,
|
| 777 |
|
|
12'b000000111010,
|
| 778 |
|
|
12'b000001xxxxxx,
|
| 779 |
|
|
12'b000001xxx110,
|
| 780 |
|
|
12'b000010000110,
|
| 781 |
|
|
12'b000010000xxx,
|
| 782 |
|
|
12'b000010001110,
|
| 783 |
|
|
12'b000010001xxx,
|
| 784 |
|
|
12'b000010010110,
|
| 785 |
|
|
12'b000010011110,
|
| 786 |
|
|
12'b000010100110,
|
| 787 |
|
|
12'b000010100xxx,
|
| 788 |
|
|
12'b000010101110,
|
| 789 |
|
|
12'b000010110110,
|
| 790 |
|
|
12'b000010110xxx,
|
| 791 |
|
|
12'b000010111110,
|
| 792 |
|
|
12'b000010111xxx,
|
| 793 |
|
|
12'b000011011011,
|
| 794 |
|
|
12'b000011xx0001,
|
| 795 |
|
|
12'b001001xxx110,
|
| 796 |
|
|
12'b001001xxxxxx,
|
| 797 |
|
|
12'b010000101010,
|
| 798 |
|
|
12'b010001xxx110,
|
| 799 |
|
|
12'b010010000110,
|
| 800 |
|
|
12'b010010001110,
|
| 801 |
|
|
12'b010010010110,
|
| 802 |
|
|
12'b010010011110,
|
| 803 |
|
|
12'b010010100110,
|
| 804 |
|
|
12'b010010101110,
|
| 805 |
|
|
12'b010010110110,
|
| 806 |
|
|
12'b010010111110,
|
| 807 |
|
|
12'b010011100001,
|
| 808 |
|
|
12'b010100101010,
|
| 809 |
|
|
12'b010101xxx110,
|
| 810 |
|
|
12'b010110000110,
|
| 811 |
|
|
12'b010110001110,
|
| 812 |
|
|
12'b010110010110,
|
| 813 |
|
|
12'b010110011110,
|
| 814 |
|
|
12'b010110100110,
|
| 815 |
|
|
12'b010110101110,
|
| 816 |
|
|
12'b010110110110,
|
| 817 |
|
|
12'b010110111110,
|
| 818 |
|
|
12'b010111100001,
|
| 819 |
|
|
12'b011001xxx110,
|
| 820 |
|
|
12'b011101xxx110,
|
| 821 |
|
|
12'b1xxx01xxx000,
|
| 822 |
|
|
12'b1xxx01xx1011: state_nxt = `sIF1A;
|
| 823 |
|
|
12'b000011001001,
|
| 824 |
|
|
12'b000011xxx000,
|
| 825 |
|
|
12'b1xxx01000101,
|
| 826 |
|
|
12'b1xxx01001101: state_nxt = `sPCA;
|
| 827 |
|
|
12'b000011100011,
|
| 828 |
|
|
12'b0001xxxxxxxx,
|
| 829 |
|
|
12'b010011100011,
|
| 830 |
|
|
12'b010111100011: state_nxt = `sWR1A;
|
| 831 |
|
|
default: state_nxt = `sWR2A;
|
| 832 |
|
|
endcase
|
| 833 |
|
|
end
|
| 834 |
|
|
`WR1A: state_nxt = `sWR1B;
|
| 835 |
|
|
`WR1B: begin
|
| 836 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 837 |
|
|
12'b1xxx10100000,
|
| 838 |
|
|
12'b1xxx10100010,
|
| 839 |
|
|
12'b1xxx10100011,
|
| 840 |
|
|
12'b1xxx10101000,
|
| 841 |
|
|
12'b1xxx10101010,
|
| 842 |
|
|
12'b1xxx10101011: state_nxt = `sIF1A;
|
| 843 |
|
|
12'b1xxx10110010,
|
| 844 |
|
|
12'b1xxx10111010,
|
| 845 |
|
|
12'b1xxx10110011,
|
| 846 |
|
|
12'b1xxx10111011,
|
| 847 |
|
|
12'b1xxx10110000,
|
| 848 |
|
|
12'b1xxx10111000: state_nxt = (tflg_reg || intr_reg || dmar_reg) ? `sPCA : `sRD2A;
|
| 849 |
|
|
default: state_nxt = `sWR2A;
|
| 850 |
|
|
endcase
|
| 851 |
|
|
end
|
| 852 |
|
|
`WR2A: state_nxt = `sWR2B;
|
| 853 |
|
|
`WR2B: begin
|
| 854 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 855 |
|
|
12'b1xxx10110010,
|
| 856 |
|
|
12'b1xxx10111010,
|
| 857 |
|
|
12'b1xxx10110011,
|
| 858 |
|
|
12'b1xxx10111011,
|
| 859 |
|
|
12'b1xxx10110000,
|
| 860 |
|
|
12'b1xxx10111000: state_nxt = (tflg_reg || intr_reg || dmar_reg) ? `sPCA : `sRD2A;
|
| 861 |
|
|
default: state_nxt = `sIF1A;
|
| 862 |
|
|
endcase
|
| 863 |
|
|
end
|
| 864 |
|
|
`BLK1: state_nxt = `sBLK2;
|
| 865 |
|
|
`BLK2: begin
|
| 866 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 867 |
|
|
12'b1xxx10110001,
|
| 868 |
|
|
12'b1xxx10111001: state_nxt = (tflg_reg || intr_reg || dmar_reg) ? `sPCA : `sRD2A;
|
| 869 |
|
|
default: state_nxt = `sIF1A;
|
| 870 |
|
|
endcase
|
| 871 |
|
|
end
|
| 872 |
|
|
`PCA: state_nxt = `sPCO;
|
| 873 |
|
|
`PCO: begin
|
| 874 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 875 |
|
|
12'b000001110110: state_nxt = `sHLTA;
|
| 876 |
|
|
default: state_nxt = `sIF1A;
|
| 877 |
|
|
endcase
|
| 878 |
|
|
end
|
| 879 |
|
|
`HLTA: state_nxt = `sHLTB;
|
| 880 |
|
|
`HLTB: state_nxt = (xhlt_reg) ? `sIF1A : `sHLTA;
|
| 881 |
|
|
`IF1A: state_nxt = `sIF1B;
|
| 882 |
|
|
`IF1B: state_nxt = `sDEC1;
|
| 883 |
|
|
`INTA: state_nxt = `sINTB;
|
| 884 |
|
|
`INTB: state_nxt = (vector_int) ? `sADR1 : `sWR1A;
|
| 885 |
|
|
`DMA1: state_nxt = `sDMA2;
|
| 886 |
|
|
`DMA2: state_nxt = (dmar_reg) ? `sDMA1 : `sIF1A;
|
| 887 |
|
|
`RSTE: state_nxt = `sIF1A;
|
| 888 |
|
|
default: state_nxt = `sRSTE;
|
| 889 |
|
|
endcase
|
| 890 |
|
|
end
|
| 891 |
|
|
|
| 892 |
|
|
/*****************************************************************************************/
|
| 893 |
|
|
/* */
|
| 894 |
|
|
/* transaction type control */
|
| 895 |
|
|
/* */
|
| 896 |
|
|
/*****************************************************************************************/
|
| 897 |
|
|
always @ (inst_reg or page_reg or state_reg or carry_bit or dmar_reg or intr_reg or
|
| 898 |
|
|
par_bit or sign_bit or tflg_reg or vector_int or xhlt_reg or zero_bit) begin
|
| 899 |
|
|
casex (state_reg) //synopsys parallel_case
|
| 900 |
|
|
`IF2B: tran_sel = `TRAN_IF;
|
| 901 |
|
|
`OF1B: begin
|
| 902 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 903 |
|
|
12'b000000010000,
|
| 904 |
|
|
12'b000000011000,
|
| 905 |
|
|
12'b000011010011,
|
| 906 |
|
|
12'b000011011011,
|
| 907 |
|
|
12'b010x00110100,
|
| 908 |
|
|
12'b010x00110101,
|
| 909 |
|
|
12'b010x011100xx,
|
| 910 |
|
|
12'b010x0111010x,
|
| 911 |
|
|
12'b010x01110111,
|
| 912 |
|
|
12'b010x010xx110,
|
| 913 |
|
|
12'b010x0110x110,
|
| 914 |
|
|
12'b010x01111110,
|
| 915 |
|
|
12'b010x10000110,
|
| 916 |
|
|
12'b010x10001110,
|
| 917 |
|
|
12'b010x10010110,
|
| 918 |
|
|
12'b010x10011110,
|
| 919 |
|
|
12'b010x10100110,
|
| 920 |
|
|
12'b010x10101110,
|
| 921 |
|
|
12'b010x10110110,
|
| 922 |
|
|
12'b010x10111110: tran_sel = `TRAN_IDL;
|
| 923 |
|
|
12'b000000100000: tran_sel = ( zero_bit) ? `TRAN_IF : `TRAN_IDL;
|
| 924 |
|
|
12'b000000101000: tran_sel = ( !zero_bit) ? `TRAN_IF : `TRAN_IDL;
|
| 925 |
|
|
12'b000000110000: tran_sel = ( carry_bit) ? `TRAN_IF : `TRAN_IDL;
|
| 926 |
|
|
12'b000000111000: tran_sel = (!carry_bit) ? `TRAN_IF : `TRAN_IDL;
|
| 927 |
|
|
12'b000000110110: tran_sel = `TRAN_MEM;
|
| 928 |
|
|
default: tran_sel = `TRAN_IF;
|
| 929 |
|
|
endcase
|
| 930 |
|
|
end
|
| 931 |
|
|
`OF2B: begin
|
| 932 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 933 |
|
|
12'b000000xx0001,
|
| 934 |
|
|
12'b010000100001,
|
| 935 |
|
|
12'b010100100001: tran_sel = `TRAN_IF;
|
| 936 |
|
|
12'b010000110110,
|
| 937 |
|
|
12'b010100110110: tran_sel = `TRAN_MEM;
|
| 938 |
|
|
12'b000011001101: tran_sel = `TRAN_STK;
|
| 939 |
|
|
12'b000011000010: tran_sel = ( !zero_bit) ? `TRAN_IDL : `TRAN_IF;
|
| 940 |
|
|
12'b000011001010: tran_sel = ( zero_bit) ? `TRAN_IDL : `TRAN_IF;
|
| 941 |
|
|
12'b000011010010: tran_sel = (!carry_bit) ? `TRAN_IDL : `TRAN_IF;
|
| 942 |
|
|
12'b000011011010: tran_sel = ( carry_bit) ? `TRAN_IDL : `TRAN_IF;
|
| 943 |
|
|
12'b000011100010: tran_sel = ( !par_bit) ? `TRAN_IDL : `TRAN_IF;
|
| 944 |
|
|
12'b000011101010: tran_sel = ( par_bit) ? `TRAN_IDL : `TRAN_IF;
|
| 945 |
|
|
12'b000011110010: tran_sel = ( !sign_bit) ? `TRAN_IDL : `TRAN_IF;
|
| 946 |
|
|
12'b000011111010: tran_sel = ( sign_bit) ? `TRAN_IDL : `TRAN_IF;
|
| 947 |
|
|
12'b000011000100: tran_sel = ( !zero_bit) ? `TRAN_STK : `TRAN_IF;
|
| 948 |
|
|
12'b000011001100: tran_sel = ( zero_bit) ? `TRAN_STK : `TRAN_IF;
|
| 949 |
|
|
12'b000011010100: tran_sel = (!carry_bit) ? `TRAN_STK : `TRAN_IF;
|
| 950 |
|
|
12'b000011011100: tran_sel = ( carry_bit) ? `TRAN_STK : `TRAN_IF;
|
| 951 |
|
|
12'b000011100100: tran_sel = ( !par_bit) ? `TRAN_STK : `TRAN_IF;
|
| 952 |
|
|
12'b000011101100: tran_sel = ( par_bit) ? `TRAN_STK : `TRAN_IF;
|
| 953 |
|
|
12'b000011110100: tran_sel = ( !sign_bit) ? `TRAN_STK : `TRAN_IF;
|
| 954 |
|
|
12'b000011111100: tran_sel = ( sign_bit) ? `TRAN_STK : `TRAN_IF;
|
| 955 |
|
|
default: tran_sel = `TRAN_IDL;
|
| 956 |
|
|
endcase
|
| 957 |
|
|
end
|
| 958 |
|
|
`IF3B: tran_sel = `TRAN_MEM;
|
| 959 |
|
|
`ADR2: begin
|
| 960 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 961 |
|
|
12'b000011010011,
|
| 962 |
|
|
12'b000011011011,
|
| 963 |
|
|
12'b1xxx01xxx000,
|
| 964 |
|
|
12'b1xxx01xxx001,
|
| 965 |
|
|
12'b1xxx10100010,
|
| 966 |
|
|
12'b1xxx10101010,
|
| 967 |
|
|
12'b1xxx10110010,
|
| 968 |
|
|
12'b1xxx10111010: tran_sel = `TRAN_IO;
|
| 969 |
|
|
12'b000011001001,
|
| 970 |
|
|
12'b000011xxx000,
|
| 971 |
|
|
12'b000011xxx111,
|
| 972 |
|
|
12'b000011xx0001,
|
| 973 |
|
|
12'b000011xx0101,
|
| 974 |
|
|
12'b010011100001,
|
| 975 |
|
|
12'b010011100101,
|
| 976 |
|
|
12'b010111100001,
|
| 977 |
|
|
12'b010111100101,
|
| 978 |
|
|
12'b1xxx01000101,
|
| 979 |
|
|
12'b1xxx01001101: tran_sel = `TRAN_STK;
|
| 980 |
|
|
default: tran_sel = `TRAN_MEM;
|
| 981 |
|
|
endcase
|
| 982 |
|
|
end
|
| 983 |
|
|
`RD1B: begin
|
| 984 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 985 |
|
|
12'b1xxx10100001,
|
| 986 |
|
|
12'b1xxx10101001,
|
| 987 |
|
|
12'b1xxx10110001,
|
| 988 |
|
|
12'b1xxx10111001: tran_sel = `TRAN_IDL;
|
| 989 |
|
|
12'b1xxx10100011,
|
| 990 |
|
|
12'b1xxx10101011,
|
| 991 |
|
|
12'b1xxx10110011,
|
| 992 |
|
|
12'b1xxx10111011: tran_sel = `TRAN_IO;
|
| 993 |
|
|
12'b000011001001,
|
| 994 |
|
|
12'b000011xxx000,
|
| 995 |
|
|
12'b000011xx0001,
|
| 996 |
|
|
12'b010011100001,
|
| 997 |
|
|
12'b010111100001,
|
| 998 |
|
|
12'b1xxx01000101,
|
| 999 |
|
|
12'b1xxx01001101: tran_sel = `TRAN_STK;
|
| 1000 |
|
|
default: tran_sel = `TRAN_MEM;
|
| 1001 |
|
|
endcase
|
| 1002 |
|
|
end
|
| 1003 |
|
|
`RD2B: begin
|
| 1004 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 1005 |
|
|
12'b000011001001,
|
| 1006 |
|
|
12'b000011xxx000,
|
| 1007 |
|
|
12'b1xxx01000101,
|
| 1008 |
|
|
12'b1xxx01001101,
|
| 1009 |
|
|
12'b1xxx10100001,
|
| 1010 |
|
|
12'b1xxx10101001,
|
| 1011 |
|
|
12'b1xxx10110001,
|
| 1012 |
|
|
12'b1xxx10111001: tran_sel = `TRAN_IDL;
|
| 1013 |
|
|
12'b000000001010,
|
| 1014 |
|
|
12'b000000011010,
|
| 1015 |
|
|
12'b000000101010,
|
| 1016 |
|
|
12'b000000111010,
|
| 1017 |
|
|
12'b000001xxx110,
|
| 1018 |
|
|
12'b000010000110,
|
| 1019 |
|
|
12'b000010001110,
|
| 1020 |
|
|
12'b000010010110,
|
| 1021 |
|
|
12'b000010011110,
|
| 1022 |
|
|
12'b000010100110,
|
| 1023 |
|
|
12'b000010101110,
|
| 1024 |
|
|
12'b000010110110,
|
| 1025 |
|
|
12'b000010111110,
|
| 1026 |
|
|
12'b000011011011,
|
| 1027 |
|
|
12'b000011xx0001,
|
| 1028 |
|
|
12'b001001xxx110,
|
| 1029 |
|
|
12'b010000101010,
|
| 1030 |
|
|
12'b010001xxx110,
|
| 1031 |
|
|
12'b010010000110,
|
| 1032 |
|
|
12'b010010001110,
|
| 1033 |
|
|
12'b010010010110,
|
| 1034 |
|
|
12'b010010011110,
|
| 1035 |
|
|
12'b010010100110,
|
| 1036 |
|
|
12'b010010101110,
|
| 1037 |
|
|
12'b010010110110,
|
| 1038 |
|
|
12'b010010111110,
|
| 1039 |
|
|
12'b010011100001,
|
| 1040 |
|
|
12'b010100101010,
|
| 1041 |
|
|
12'b010101xxx110,
|
| 1042 |
|
|
12'b010110000110,
|
| 1043 |
|
|
12'b010110001110,
|
| 1044 |
|
|
12'b010110010110,
|
| 1045 |
|
|
12'b010110011110,
|
| 1046 |
|
|
12'b010110100110,
|
| 1047 |
|
|
12'b010110101110,
|
| 1048 |
|
|
12'b010110110110,
|
| 1049 |
|
|
12'b010110111110,
|
| 1050 |
|
|
12'b010111100001,
|
| 1051 |
|
|
12'b011001xxx110,
|
| 1052 |
|
|
12'b011101xxx110,
|
| 1053 |
|
|
12'b1xxx01xxx000,
|
| 1054 |
|
|
12'b1xxx01xx1011: tran_sel = `TRAN_IF;
|
| 1055 |
|
|
12'b1xxx10100011,
|
| 1056 |
|
|
12'b1xxx10101011,
|
| 1057 |
|
|
12'b1xxx10110011,
|
| 1058 |
|
|
12'b1xxx10111011: tran_sel = `TRAN_IO;
|
| 1059 |
|
|
12'b000011100011,
|
| 1060 |
|
|
12'b0001xxxxxxxx,
|
| 1061 |
|
|
12'b010011100011,
|
| 1062 |
|
|
12'b010111100011: tran_sel = `TRAN_STK;
|
| 1063 |
|
|
default: tran_sel = `TRAN_MEM;
|
| 1064 |
|
|
endcase
|
| 1065 |
|
|
end
|
| 1066 |
|
|
`WR1B: begin
|
| 1067 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 1068 |
|
|
12'b1xxx10110010,
|
| 1069 |
|
|
12'b1xxx10111010: tran_sel = (tflg_reg || intr_reg || dmar_reg) ? `TRAN_IDL : `TRAN_IO;
|
| 1070 |
|
|
12'b1xxx10110000,
|
| 1071 |
|
|
12'b1xxx10111000,
|
| 1072 |
|
|
12'b1xxx10110011,
|
| 1073 |
|
|
12'b1xxx10111011: tran_sel = (tflg_reg || intr_reg || dmar_reg) ? `TRAN_IDL : `TRAN_MEM;
|
| 1074 |
|
|
12'b1xxx10100000,
|
| 1075 |
|
|
12'b1xxx10100010,
|
| 1076 |
|
|
12'b1xxx10100011,
|
| 1077 |
|
|
12'b1xxx10101000,
|
| 1078 |
|
|
12'b1xxx10101010,
|
| 1079 |
|
|
12'b1xxx10101011: tran_sel = `TRAN_IF;
|
| 1080 |
|
|
12'b000000100010,
|
| 1081 |
|
|
12'b010000100010,
|
| 1082 |
|
|
12'b010100100010,
|
| 1083 |
|
|
12'b1xxx01xx0011: tran_sel = `TRAN_MEM;
|
| 1084 |
|
|
default: tran_sel = `TRAN_STK;
|
| 1085 |
|
|
endcase
|
| 1086 |
|
|
end
|
| 1087 |
|
|
`WR2B: begin
|
| 1088 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 1089 |
|
|
12'b1xxx10110010,
|
| 1090 |
|
|
12'b1xxx10111010: tran_sel = (tflg_reg || intr_reg || dmar_reg) ? `TRAN_IDL : `TRAN_IO;
|
| 1091 |
|
|
12'b1xxx10110000,
|
| 1092 |
|
|
12'b1xxx10111000,
|
| 1093 |
|
|
12'b1xxx10110011,
|
| 1094 |
|
|
12'b1xxx10111011: tran_sel = (tflg_reg || intr_reg || dmar_reg) ? `TRAN_IDL : `TRAN_MEM;
|
| 1095 |
|
|
default: tran_sel = `TRAN_IF;
|
| 1096 |
|
|
endcase
|
| 1097 |
|
|
end
|
| 1098 |
|
|
`BLK2: begin
|
| 1099 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 1100 |
|
|
12'b1xxx10110001,
|
| 1101 |
|
|
12'b1xxx10111001: tran_sel = (tflg_reg || intr_reg || dmar_reg) ? `TRAN_IDL : `TRAN_MEM;
|
| 1102 |
|
|
default: tran_sel = `TRAN_IF;
|
| 1103 |
|
|
endcase
|
| 1104 |
|
|
end
|
| 1105 |
|
|
`PCO: begin
|
| 1106 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 1107 |
|
|
12'b000001110110: tran_sel = `TRAN_IDL;
|
| 1108 |
|
|
default: tran_sel = `TRAN_IF;
|
| 1109 |
|
|
endcase
|
| 1110 |
|
|
end
|
| 1111 |
|
|
`IF1B: begin
|
| 1112 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 1113 |
|
|
12'b1xxx01000101,
|
| 1114 |
|
|
12'b1xxx01001101,
|
| 1115 |
|
|
12'b000011110011,
|
| 1116 |
|
|
12'b0001xxxxxxxx: tran_sel = `TRAN_IF;
|
| 1117 |
|
|
default: tran_sel = (dmar_reg) ? `TRAN_IDL :
|
| 1118 |
|
|
(intr_reg) ? `TRAN_IAK : `TRAN_IF;
|
| 1119 |
|
|
endcase
|
| 1120 |
|
|
end
|
| 1121 |
|
|
`HLTB: tran_sel = (xhlt_reg) ? `TRAN_IF : `TRAN_IDL;
|
| 1122 |
|
|
`INTB: tran_sel = (vector_int) ? `TRAN_IDL : `TRAN_MEM;
|
| 1123 |
|
|
`DMA2: tran_sel = (dmar_reg) ? `TRAN_IDL : `TRAN_IF;
|
| 1124 |
|
|
`RSTE: tran_sel = `TRAN_IF;
|
| 1125 |
|
|
default: tran_sel = `TRAN_RSTVAL;
|
| 1126 |
|
|
endcase
|
| 1127 |
|
|
end
|
| 1128 |
|
|
|
| 1129 |
|
|
/*****************************************************************************************/
|
| 1130 |
|
|
/* */
|
| 1131 |
|
|
/* special transaction identifiers */
|
| 1132 |
|
|
/* */
|
| 1133 |
|
|
/*****************************************************************************************/
|
| 1134 |
|
|
always @ (inst_reg or page_reg or state_reg or xhlt_reg) begin
|
| 1135 |
|
|
casex (state_reg)
|
| 1136 |
|
|
`PCO,
|
| 1137 |
|
|
`HLTB: begin
|
| 1138 |
|
|
casex ({page_reg, inst_reg})
|
| 1139 |
|
|
12'b000001110110: halt_nxt = !xhlt_reg;
|
| 1140 |
|
|
default: halt_nxt = 1'b0;
|
| 1141 |
|
|
endcase
|
| 1142 |
|
|
end
|
| 1143 |
|
|
default: halt_nxt = 1'b0;
|
| 1144 |
|
|
endcase
|
| 1145 |
|
|
end
|
| 1146 |
|
|
|
| 1147 |
|
|
always @ (inst_reg or page_reg or state_reg) begin
|
| 1148 |
|
|
casex (state_reg)
|
| 1149 |
|
|
`RD2B: begin
|
| 1150 |
|
|
casex ({page_reg, inst_reg})
|
| 1151 |
|
|
12'b1xxx01001101: reti_nxt = 1'b1;
|
| 1152 |
|
|
default: reti_nxt = 1'b0;
|
| 1153 |
|
|
endcase
|
| 1154 |
|
|
end
|
| 1155 |
|
|
default: reti_nxt = 1'b0;
|
| 1156 |
|
|
endcase
|
| 1157 |
|
|
end
|
| 1158 |
|
|
|
| 1159 |
|
|
/*****************************************************************************************/
|
| 1160 |
|
|
/* */
|
| 1161 |
|
|
/* output inhibit */
|
| 1162 |
|
|
/* */
|
| 1163 |
|
|
/*****************************************************************************************/
|
| 1164 |
|
|
always @ (inst_reg or page_reg or state_reg or dmar_reg or xhlt_reg) begin
|
| 1165 |
|
|
casex (state_reg)
|
| 1166 |
|
|
`IF1B: begin
|
| 1167 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 1168 |
|
|
12'b1xxx01000101,
|
| 1169 |
|
|
12'b1xxx01001101,
|
| 1170 |
|
|
12'b000011110011,
|
| 1171 |
|
|
12'b0001xxxxxxxx: output_inh = 1'b0;
|
| 1172 |
|
|
default: output_inh = dmar_reg;
|
| 1173 |
|
|
endcase
|
| 1174 |
|
|
end
|
| 1175 |
|
|
`DMA2: output_inh = dmar_reg;
|
| 1176 |
|
|
`PCO,
|
| 1177 |
|
|
`HLTB: begin
|
| 1178 |
|
|
casex ({page_reg, inst_reg})
|
| 1179 |
|
|
12'b000001110110: output_inh = !xhlt_reg;
|
| 1180 |
|
|
default: output_inh = 1'b0;
|
| 1181 |
|
|
endcase
|
| 1182 |
|
|
end
|
| 1183 |
|
|
default: output_inh = 1'b0;
|
| 1184 |
|
|
endcase
|
| 1185 |
|
|
end
|
| 1186 |
|
|
|
| 1187 |
|
|
/*****************************************************************************************/
|
| 1188 |
|
|
/* */
|
| 1189 |
|
|
/* address output control */
|
| 1190 |
|
|
/* */
|
| 1191 |
|
|
/*****************************************************************************************/
|
| 1192 |
|
|
always @ (inst_reg or page_reg or state_reg or carry_bit or par_bit or sign_bit or
|
| 1193 |
|
|
vector_int or zero_bit) begin
|
| 1194 |
|
|
casex (state_reg) //synopsys parallel_case
|
| 1195 |
|
|
`DEC1: begin
|
| 1196 |
|
|
casex (inst_reg) //synopsys parallel_case
|
| 1197 |
|
|
8'b00000010,
|
| 1198 |
|
|
8'b00001010,
|
| 1199 |
|
|
8'b00010010,
|
| 1200 |
|
|
8'b00011010,
|
| 1201 |
|
|
8'b11101001,
|
| 1202 |
|
|
8'b11xx0101,
|
| 1203 |
|
|
8'b11xxx111: add_sel = `ADD_ALU;
|
| 1204 |
|
|
8'b00110100,
|
| 1205 |
|
|
8'b00110101,
|
| 1206 |
|
|
8'b00110110,
|
| 1207 |
|
|
8'b011100xx,
|
| 1208 |
|
|
8'b0111010x,
|
| 1209 |
|
|
8'b01110111,
|
| 1210 |
|
|
8'b010xx110,
|
| 1211 |
|
|
8'b0110x110,
|
| 1212 |
|
|
8'b01111110,
|
| 1213 |
|
|
8'b10000110,
|
| 1214 |
|
|
8'b10001110,
|
| 1215 |
|
|
8'b10010110,
|
| 1216 |
|
|
8'b10011110,
|
| 1217 |
|
|
8'b10100110,
|
| 1218 |
|
|
8'b10101110,
|
| 1219 |
|
|
8'b10110110,
|
| 1220 |
|
|
8'b10111110: add_sel = `ADD_HL;
|
| 1221 |
|
|
8'b11000000: add_sel = ( !zero_bit) ? `ADD_SP : `ADD_PC;
|
| 1222 |
|
|
8'b11001000: add_sel = ( zero_bit) ? `ADD_SP : `ADD_PC;
|
| 1223 |
|
|
8'b11010000: add_sel = (!carry_bit) ? `ADD_SP : `ADD_PC;
|
| 1224 |
|
|
8'b11011000: add_sel = ( carry_bit) ? `ADD_SP : `ADD_PC;
|
| 1225 |
|
|
8'b11100000: add_sel = ( !par_bit) ? `ADD_SP : `ADD_PC;
|
| 1226 |
|
|
8'b11101000: add_sel = ( par_bit) ? `ADD_SP : `ADD_PC;
|
| 1227 |
|
|
8'b11110000: add_sel = ( !sign_bit) ? `ADD_SP : `ADD_PC;
|
| 1228 |
|
|
8'b11111000: add_sel = ( sign_bit) ? `ADD_SP : `ADD_PC;
|
| 1229 |
|
|
8'b11xx0001,
|
| 1230 |
|
|
8'b11100011,
|
| 1231 |
|
|
8'b11001001: add_sel = `ADD_SP;
|
| 1232 |
|
|
default: add_sel = `ADD_PC;
|
| 1233 |
|
|
endcase
|
| 1234 |
|
|
end
|
| 1235 |
|
|
`DEC2: begin
|
| 1236 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 1237 |
|
|
12'b010011100101,
|
| 1238 |
|
|
12'b010011101001,
|
| 1239 |
|
|
12'b010111100101,
|
| 1240 |
|
|
12'b010111101001,
|
| 1241 |
|
|
12'b1xxx01xxx000,
|
| 1242 |
|
|
12'b1xxx01xxx001,
|
| 1243 |
|
|
12'b1xxx10100000,
|
| 1244 |
|
|
12'b1xxx10100001,
|
| 1245 |
|
|
12'b1xxx10100010,
|
| 1246 |
|
|
12'b1xxx10100011,
|
| 1247 |
|
|
12'b1xxx10101000,
|
| 1248 |
|
|
12'b1xxx10101001,
|
| 1249 |
|
|
12'b1xxx10101010,
|
| 1250 |
|
|
12'b1xxx10101011,
|
| 1251 |
|
|
12'b1xxx10110000,
|
| 1252 |
|
|
12'b1xxx10110001,
|
| 1253 |
|
|
12'b1xxx10110010,
|
| 1254 |
|
|
12'b1xxx10110011,
|
| 1255 |
|
|
12'b1xxx10111000,
|
| 1256 |
|
|
12'b1xxx10111001,
|
| 1257 |
|
|
12'b1xxx10111010,
|
| 1258 |
4 |
bsa |
12'b1xxx10111011: add_sel = `ADD_ALU;
|
| 1259 |
2 |
bsa |
12'b001000000110,
|
| 1260 |
|
|
12'b001000001110,
|
| 1261 |
|
|
12'b001000010110,
|
| 1262 |
|
|
12'b001000011110,
|
| 1263 |
|
|
12'b001000100110,
|
| 1264 |
|
|
12'b001000101110,
|
| 1265 |
4 |
bsa |
12'b001000110110,
|
| 1266 |
2 |
bsa |
12'b001000111110,
|
| 1267 |
|
|
12'b001001xxx110,
|
| 1268 |
|
|
12'b001010xxx110,
|
| 1269 |
|
|
12'b001011xxx110,
|
| 1270 |
|
|
12'b1xxx01100111,
|
| 1271 |
|
|
12'b1xxx01101111: add_sel = `ADD_HL;
|
| 1272 |
|
|
12'b010011100001,
|
| 1273 |
|
|
12'b010011100011,
|
| 1274 |
|
|
12'b010111100001,
|
| 1275 |
|
|
12'b010111100011,
|
| 1276 |
|
|
12'b1xxx01000101,
|
| 1277 |
|
|
12'b1xxx01001101: add_sel = `ADD_SP;
|
| 1278 |
|
|
default: add_sel = `ADD_PC;
|
| 1279 |
|
|
endcase
|
| 1280 |
|
|
end
|
| 1281 |
|
|
`OF2A: begin
|
| 1282 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 1283 |
|
|
12'b000011001101,
|
| 1284 |
|
|
12'b010000110110,
|
| 1285 |
|
|
12'b010100110110: add_sel = `ADD_ALU;
|
| 1286 |
|
|
12'b000011000100: add_sel = ( !zero_bit) ? `ADD_ALU : `ADD_PC;
|
| 1287 |
|
|
12'b000011001100: add_sel = ( zero_bit) ? `ADD_ALU : `ADD_PC;
|
| 1288 |
|
|
12'b000011010100: add_sel = (!carry_bit) ? `ADD_ALU : `ADD_PC;
|
| 1289 |
|
|
12'b000011011100: add_sel = ( carry_bit) ? `ADD_ALU : `ADD_PC;
|
| 1290 |
|
|
12'b000011100100: add_sel = ( !par_bit) ? `ADD_ALU : `ADD_PC;
|
| 1291 |
|
|
12'b000011101100: add_sel = ( par_bit) ? `ADD_ALU : `ADD_PC;
|
| 1292 |
|
|
12'b000011110100: add_sel = ( !sign_bit) ? `ADD_ALU : `ADD_PC;
|
| 1293 |
|
|
12'b000011111100: add_sel = ( sign_bit) ? `ADD_ALU : `ADD_PC;
|
| 1294 |
|
|
default: add_sel = `ADD_PC;
|
| 1295 |
|
|
endcase
|
| 1296 |
|
|
end
|
| 1297 |
|
|
`IF3A,
|
| 1298 |
|
|
`ADR1,
|
| 1299 |
|
|
`RD1A: add_sel = `ADD_ALU;
|
| 1300 |
|
|
`RD2A: begin
|
| 1301 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 1302 |
|
|
12'b000011100011,
|
| 1303 |
|
|
12'b0001xxxxxxxx,
|
| 1304 |
|
|
12'b010000110100,
|
| 1305 |
|
|
12'b010000110101,
|
| 1306 |
|
|
12'b010011100011,
|
| 1307 |
|
|
12'b010100110100,
|
| 1308 |
|
|
12'b010100110101,
|
| 1309 |
|
|
12'b010111100011,
|
| 1310 |
4 |
bsa |
12'b011x00xxxxxx,
|
| 1311 |
|
|
12'b011x1xxxxxxx,
|
| 1312 |
2 |
bsa |
12'b1xxx10100000,
|
| 1313 |
|
|
12'b1xxx10100001,
|
| 1314 |
|
|
12'b1xxx10100010,
|
| 1315 |
|
|
12'b1xxx10100011,
|
| 1316 |
|
|
12'b1xxx10101000,
|
| 1317 |
|
|
12'b1xxx10101001,
|
| 1318 |
|
|
12'b1xxx10101010,
|
| 1319 |
|
|
12'b1xxx10101011,
|
| 1320 |
|
|
12'b1xxx10110000,
|
| 1321 |
|
|
12'b1xxx10110001,
|
| 1322 |
|
|
12'b1xxx10110010,
|
| 1323 |
|
|
12'b1xxx10110011,
|
| 1324 |
|
|
12'b1xxx10111000,
|
| 1325 |
|
|
12'b1xxx10111001,
|
| 1326 |
|
|
12'b1xxx10111010,
|
| 1327 |
|
|
12'b1xxx10111011: add_sel = `ADD_ALU;
|
| 1328 |
|
|
12'b000000110100,
|
| 1329 |
|
|
12'b000000110101,
|
| 1330 |
|
|
12'b000000xxx100,
|
| 1331 |
|
|
12'b000000xxx101,
|
| 1332 |
|
|
12'b001000000110,
|
| 1333 |
|
|
12'b001000000xxx,
|
| 1334 |
|
|
12'b001000001110,
|
| 1335 |
|
|
12'b001000001xxx,
|
| 1336 |
|
|
12'b001000010110,
|
| 1337 |
|
|
12'b001000010xxx,
|
| 1338 |
|
|
12'b001000011110,
|
| 1339 |
|
|
12'b001000011xxx,
|
| 1340 |
|
|
12'b001000100110,
|
| 1341 |
|
|
12'b001000100xxx,
|
| 1342 |
|
|
12'b001000101110,
|
| 1343 |
|
|
12'b001000101xxx,
|
| 1344 |
4 |
bsa |
12'b001000110110,
|
| 1345 |
|
|
12'b001000110xxx,
|
| 1346 |
2 |
bsa |
12'b001000111110,
|
| 1347 |
|
|
12'b001000111xxx,
|
| 1348 |
|
|
12'b001010xxx110,
|
| 1349 |
|
|
12'b001010xxxxxx,
|
| 1350 |
|
|
12'b001011xxx110,
|
| 1351 |
|
|
12'b001011xxxxxx,
|
| 1352 |
|
|
12'b1xxx01100111,
|
| 1353 |
|
|
12'b1xxx01101111: add_sel = `ADD_HL;
|
| 1354 |
|
|
default: add_sel = `ADD_PC;
|
| 1355 |
|
|
endcase
|
| 1356 |
|
|
end
|
| 1357 |
|
|
`WR1A: begin
|
| 1358 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 1359 |
|
|
12'b1xxx10100000,
|
| 1360 |
|
|
12'b1xxx10100010,
|
| 1361 |
|
|
12'b1xxx10100011,
|
| 1362 |
|
|
12'b1xxx10101000,
|
| 1363 |
|
|
12'b1xxx10101010,
|
| 1364 |
4 |
bsa |
12'b1xxx10101011: add_sel = `ADD_PC;
|
| 1365 |
2 |
bsa |
default: add_sel = `ADD_ALU;
|
| 1366 |
|
|
endcase
|
| 1367 |
|
|
end
|
| 1368 |
|
|
`WR2A: begin
|
| 1369 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 1370 |
|
|
12'b000011001101,
|
| 1371 |
|
|
12'b000011xxx100,
|
| 1372 |
|
|
12'b000011xxx111,
|
| 1373 |
|
|
12'b0001xxxxxxxx,
|
| 1374 |
|
|
12'b1xxx10100000,
|
| 1375 |
|
|
12'b1xxx10100010,
|
| 1376 |
|
|
12'b1xxx10100011,
|
| 1377 |
|
|
12'b1xxx10101000,
|
| 1378 |
|
|
12'b1xxx10101010,
|
| 1379 |
|
|
12'b1xxx10101011,
|
| 1380 |
|
|
12'b1xxx10110000,
|
| 1381 |
|
|
12'b1xxx10110010,
|
| 1382 |
|
|
12'b1xxx10110011,
|
| 1383 |
|
|
12'b1xxx10111000,
|
| 1384 |
|
|
12'b1xxx10111010,
|
| 1385 |
4 |
bsa |
12'b1xxx10111011: add_sel = `ADD_ALU;
|
| 1386 |
2 |
bsa |
default: add_sel = `ADD_PC;
|
| 1387 |
|
|
endcase
|
| 1388 |
|
|
end
|
| 1389 |
|
|
`BLK1: begin
|
| 1390 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 1391 |
|
|
12'b1xxx10110001,
|
| 1392 |
4 |
bsa |
12'b1xxx10111001: add_sel = `ADD_ALU;
|
| 1393 |
2 |
bsa |
default: add_sel = `ADD_PC;
|
| 1394 |
|
|
endcase
|
| 1395 |
|
|
end
|
| 1396 |
|
|
`PCA: begin
|
| 1397 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 1398 |
|
|
12'b000000010000,
|
| 1399 |
|
|
12'b000000011000,
|
| 1400 |
|
|
12'b0000001xx000,
|
| 1401 |
|
|
12'b000011000011,
|
| 1402 |
|
|
12'b000011001001,
|
| 1403 |
|
|
12'b000011xxx000,
|
| 1404 |
|
|
12'b000011xxx010,
|
| 1405 |
|
|
12'b1xxx01000101,
|
| 1406 |
|
|
12'b1xxx01001101: add_sel = `ADD_PC;
|
| 1407 |
|
|
default: add_sel = `ADD_ALU;
|
| 1408 |
|
|
endcase
|
| 1409 |
|
|
end
|
| 1410 |
|
|
`IF1A: add_sel = `ADD_PC;
|
| 1411 |
|
|
`INTA: add_sel = (vector_int) ? `ADD_PC : `ADD_ALU;
|
| 1412 |
|
|
`DMA1: add_sel = `ADD_PC;
|
| 1413 |
|
|
default: add_sel = `ADD_RSTVAL;
|
| 1414 |
|
|
endcase
|
| 1415 |
|
|
end
|
| 1416 |
|
|
|
| 1417 |
|
|
/*****************************************************************************************/
|
| 1418 |
|
|
/* */
|
| 1419 |
|
|
/* program counter control */
|
| 1420 |
|
|
/* */
|
| 1421 |
|
|
/*****************************************************************************************/
|
| 1422 |
|
|
always @ (inst_reg or page_reg or state_reg or carry_bit or par_bit or sign_bit or
|
| 1423 |
|
|
tflg_reg or zero_bit) begin
|
| 1424 |
|
|
casex (state_reg) //synopsys parallel_case
|
| 1425 |
|
|
`DEC1: begin
|
| 1426 |
|
|
casex (inst_reg) //synopsys parallel_case
|
| 1427 |
|
|
8'b00000000,
|
| 1428 |
|
|
8'b00000111,
|
| 1429 |
|
|
8'b00001000,
|
| 1430 |
|
|
8'b00001111,
|
| 1431 |
|
|
8'b00010111,
|
| 1432 |
|
|
8'b00011111,
|
| 1433 |
|
|
8'b00100111,
|
| 1434 |
|
|
8'b00101111,
|
| 1435 |
|
|
8'b00110111,
|
| 1436 |
|
|
8'b00111111,
|
| 1437 |
|
|
8'b000xx10x,
|
| 1438 |
|
|
8'b0010x10x,
|
| 1439 |
|
|
8'b0011110x,
|
| 1440 |
|
|
8'b00xx0011,
|
| 1441 |
|
|
8'b00xx1001,
|
| 1442 |
|
|
8'b00xx1011,
|
| 1443 |
|
|
8'b010xx0xx,
|
| 1444 |
|
|
8'b0110x0xx,
|
| 1445 |
|
|
8'b011110xx,
|
| 1446 |
|
|
8'b010xx10x,
|
| 1447 |
|
|
8'b0110x10x,
|
| 1448 |
|
|
8'b0111110x,
|
| 1449 |
|
|
8'b010xx111,
|
| 1450 |
|
|
8'b0110x111,
|
| 1451 |
|
|
8'b01111111,
|
| 1452 |
|
|
8'b10xxx0xx,
|
| 1453 |
|
|
8'b10xxx10x,
|
| 1454 |
|
|
8'b10xxx111,
|
| 1455 |
|
|
8'b11011001,
|
| 1456 |
|
|
8'b11101011,
|
| 1457 |
|
|
8'b11111001,
|
| 1458 |
|
|
8'b11111011: pc_sel = `PC_NILD;
|
| 1459 |
|
|
8'b01110110,
|
| 1460 |
|
|
8'b11xxx111,
|
| 1461 |
|
|
8'b00000010,
|
| 1462 |
|
|
8'b00001010,
|
| 1463 |
|
|
8'b00010010,
|
| 1464 |
|
|
8'b00011010,
|
| 1465 |
|
|
8'b00110100,
|
| 1466 |
|
|
8'b00110101,
|
| 1467 |
|
|
8'b011100xx,
|
| 1468 |
|
|
8'b0111010x,
|
| 1469 |
|
|
8'b01110111,
|
| 1470 |
|
|
8'b010xx110,
|
| 1471 |
|
|
8'b0110x110,
|
| 1472 |
|
|
8'b01111110,
|
| 1473 |
|
|
8'b10000110,
|
| 1474 |
|
|
8'b10001110,
|
| 1475 |
|
|
8'b10010110,
|
| 1476 |
|
|
8'b10011110,
|
| 1477 |
|
|
8'b10100110,
|
| 1478 |
|
|
8'b10101110,
|
| 1479 |
|
|
8'b10110110,
|
| 1480 |
|
|
8'b10111110,
|
| 1481 |
|
|
8'b11xx0001,
|
| 1482 |
|
|
8'b11xx0101,
|
| 1483 |
|
|
8'b11100011: pc_sel = `PC_NUL;
|
| 1484 |
|
|
default: pc_sel = `PC_LD;
|
| 1485 |
|
|
endcase
|
| 1486 |
|
|
end
|
| 1487 |
|
|
`DEC2: begin
|
| 1488 |
4 |
bsa |
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 1489 |
|
|
12'b010000100110,
|
| 1490 |
|
|
12'b010000101110,
|
| 1491 |
|
|
12'b010100100110,
|
| 1492 |
|
|
12'b010100101110,
|
| 1493 |
2 |
bsa |
12'b010011001011, //DD+CB prefix
|
| 1494 |
|
|
12'b010111001011, //FD+CB prefix
|
| 1495 |
|
|
12'b010000100001,
|
| 1496 |
|
|
12'b010000100010,
|
| 1497 |
|
|
12'b010000101010,
|
| 1498 |
|
|
12'b010000110100,
|
| 1499 |
|
|
12'b010000110101,
|
| 1500 |
|
|
12'b010000110110,
|
| 1501 |
|
|
12'b010001110xxx,
|
| 1502 |
|
|
12'b010001xxx110,
|
| 1503 |
|
|
12'b010010000110,
|
| 1504 |
|
|
12'b010010001110,
|
| 1505 |
|
|
12'b010010010110,
|
| 1506 |
|
|
12'b010010011110,
|
| 1507 |
|
|
12'b010010100110,
|
| 1508 |
|
|
12'b010010101110,
|
| 1509 |
|
|
12'b010010110110,
|
| 1510 |
|
|
12'b010010111110,
|
| 1511 |
|
|
12'b010011101001,
|
| 1512 |
|
|
12'b010100100001,
|
| 1513 |
|
|
12'b010100100010,
|
| 1514 |
|
|
12'b010100101010,
|
| 1515 |
|
|
12'b010100110100,
|
| 1516 |
|
|
12'b010100110101,
|
| 1517 |
|
|
12'b010100110110,
|
| 1518 |
|
|
12'b010101110xxx,
|
| 1519 |
|
|
12'b010101xxx110,
|
| 1520 |
|
|
12'b010110000110,
|
| 1521 |
|
|
12'b010110001110,
|
| 1522 |
|
|
12'b010110010110,
|
| 1523 |
|
|
12'b010110011110,
|
| 1524 |
|
|
12'b010110100110,
|
| 1525 |
|
|
12'b010110101110,
|
| 1526 |
|
|
12'b010110110110,
|
| 1527 |
|
|
12'b010110111110,
|
| 1528 |
|
|
12'b010111101001,
|
| 1529 |
|
|
12'b1xxx01000101,
|
| 1530 |
|
|
12'b1xxx01001101,
|
| 1531 |
|
|
12'b1xxx01xx0011,
|
| 1532 |
4 |
bsa |
12'b1xxx01xx1011: pc_sel = `PC_LD;
|
| 1533 |
|
|
12'b010010001100,
|
| 1534 |
|
|
12'b010010001101,
|
| 1535 |
|
|
12'b010110001100,
|
| 1536 |
|
|
12'b010110001101,
|
| 1537 |
|
|
12'b010010000100,
|
| 1538 |
|
|
12'b010010000101,
|
| 1539 |
|
|
12'b010110000100,
|
| 1540 |
|
|
12'b010110000101,
|
| 1541 |
|
|
12'b010010100100,
|
| 1542 |
|
|
12'b010010100101,
|
| 1543 |
|
|
12'b010110100100,
|
| 1544 |
|
|
12'b010110100101,
|
| 1545 |
|
|
12'b010010111100,
|
| 1546 |
|
|
12'b010010111101,
|
| 1547 |
|
|
12'b010110111100,
|
| 1548 |
|
|
12'b010110111101,
|
| 1549 |
|
|
12'b010000100101,
|
| 1550 |
|
|
12'b010000101101,
|
| 1551 |
|
|
12'b010100100101,
|
| 1552 |
|
|
12'b010100101101,
|
| 1553 |
|
|
12'b010000100100,
|
| 1554 |
|
|
12'b010000101100,
|
| 1555 |
|
|
12'b010100100100,
|
| 1556 |
|
|
12'b010100101100,
|
| 1557 |
|
|
12'b0100011000xx,12'b01000110010x,12'b010001100111,
|
| 1558 |
|
|
12'b0100011010xx,12'b01000110110x,12'b010001101111,
|
| 1559 |
|
|
12'b0101011000xx,12'b01010110010x,12'b010101100111,
|
| 1560 |
|
|
12'b0101011010xx,12'b01010110110x,12'b010101101111,
|
| 1561 |
|
|
12'b0100010xx100,12'b01000110x100,12'b010001111100,
|
| 1562 |
|
|
12'b0100010xx101,12'b01000110x101,12'b010001111101,
|
| 1563 |
|
|
12'b0101010xx100,12'b01010110x100,12'b010101111100,
|
| 1564 |
|
|
12'b0101010xx101,12'b01010110x101,12'b010101111101,
|
| 1565 |
|
|
12'b010010110100,
|
| 1566 |
|
|
12'b010010110101,
|
| 1567 |
|
|
12'b010110110100,
|
| 1568 |
|
|
12'b010110110101,
|
| 1569 |
|
|
12'b010010011100,
|
| 1570 |
|
|
12'b010010011101,
|
| 1571 |
|
|
12'b010110011100,
|
| 1572 |
|
|
12'b010110011101,
|
| 1573 |
|
|
12'b010010010100,
|
| 1574 |
|
|
12'b010010010101,
|
| 1575 |
|
|
12'b010110010100,
|
| 1576 |
|
|
12'b010110010101,
|
| 1577 |
|
|
12'b010010101100,
|
| 1578 |
|
|
12'b010010101101,
|
| 1579 |
|
|
12'b010110101100,
|
| 1580 |
|
|
12'b010110101101,
|
| 1581 |
|
|
12'b0010000000xx,12'b00100000010x,12'b001000000111,
|
| 1582 |
|
|
12'b0010000010xx,12'b00100000110x,12'b001000001111,
|
| 1583 |
|
|
12'b0010000100xx,12'b00100001010x,12'b001000010111,
|
| 1584 |
|
|
12'b0010000110xx,12'b00100001110x,12'b001000011111,
|
| 1585 |
|
|
12'b0010001000xx,12'b00100010010x,12'b001000100111,
|
| 1586 |
|
|
12'b0010001010xx,12'b00100010110x,12'b001000101111,
|
| 1587 |
|
|
12'b0010001100xx,12'b00100011010x,12'b001000110111,
|
| 1588 |
|
|
12'b0010001110xx,12'b00100011110x,12'b001000111111,
|
| 1589 |
|
|
12'b001001xxx0xx,12'b001001xxx10x,12'b001001xxx111,
|
| 1590 |
|
|
12'b001010xxx0xx,12'b001010xxx10x,12'b001010xxx111,
|
| 1591 |
|
|
12'b001011xxx0xx,12'b001011xxx10x,12'b001011xxx111,
|
| 1592 |
2 |
bsa |
12'b010000100011,
|
| 1593 |
|
|
12'b010000101011,
|
| 1594 |
|
|
12'b010000xx1001,
|
| 1595 |
|
|
12'b010011111001,
|
| 1596 |
|
|
12'b010100100011,
|
| 1597 |
|
|
12'b010100101011,
|
| 1598 |
|
|
12'b010100xx1001,
|
| 1599 |
|
|
12'b010111111001,
|
| 1600 |
|
|
12'b1xxx01000100,
|
| 1601 |
|
|
12'b1xxx01000110,
|
| 1602 |
|
|
12'b1xxx01000111,
|
| 1603 |
|
|
12'b1xxx01001111,
|
| 1604 |
|
|
12'b1xxx01010110,
|
| 1605 |
|
|
12'b1xxx01010111,
|
| 1606 |
|
|
12'b1xxx01011110,
|
| 1607 |
|
|
12'b1xxx01011111,
|
| 1608 |
|
|
12'b1xxx01xx0010,
|
| 1609 |
|
|
12'b1xxx01xx1010: pc_sel = `PC_NILD;
|
| 1610 |
|
|
default: pc_sel = `PC_NUL;
|
| 1611 |
|
|
endcase
|
| 1612 |
|
|
end
|
| 1613 |
|
|
`OF2A: begin
|
| 1614 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 1615 |
|
|
12'b000000100010,
|
| 1616 |
|
|
12'b000000101010,
|
| 1617 |
|
|
12'b000000110010,
|
| 1618 |
|
|
12'b000000111010,
|
| 1619 |
|
|
12'b000000xx0001,
|
| 1620 |
|
|
12'b000011000011,
|
| 1621 |
|
|
12'b000011001101,
|
| 1622 |
|
|
12'b000011xxx010,
|
| 1623 |
|
|
12'b000011xxx100,
|
| 1624 |
|
|
12'b010000100001,
|
| 1625 |
|
|
12'b010000100010,
|
| 1626 |
|
|
12'b010000101010,
|
| 1627 |
|
|
12'b010000110110,
|
| 1628 |
|
|
12'b010100100001,
|
| 1629 |
|
|
12'b010100100010,
|
| 1630 |
|
|
12'b010100101010,
|
| 1631 |
|
|
12'b010100110110,
|
| 1632 |
|
|
12'b1xxx01xx0011,
|
| 1633 |
|
|
12'b1xxx01xx1011: pc_sel = `PC_LD;
|
| 1634 |
|
|
default: pc_sel = `PC_NUL;
|
| 1635 |
|
|
endcase
|
| 1636 |
|
|
end
|
| 1637 |
|
|
`IF3A: begin
|
| 1638 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 1639 |
|
|
12'b01xx11001011: pc_sel = `PC_LD;
|
| 1640 |
|
|
default: pc_sel = `PC_NUL;
|
| 1641 |
|
|
endcase
|
| 1642 |
|
|
end
|
| 1643 |
|
|
`WR2B: begin
|
| 1644 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 1645 |
|
|
12'b000011001101,
|
| 1646 |
|
|
12'b000011xxx100,
|
| 1647 |
|
|
12'b000011xxx111,
|
| 1648 |
|
|
12'b0001xxxxxxxx: pc_sel = `PC_LD;
|
| 1649 |
|
|
default: pc_sel = `PC_NUL;
|
| 1650 |
|
|
endcase
|
| 1651 |
|
|
end
|
| 1652 |
|
|
`RD1B,
|
| 1653 |
|
|
`RD2B: begin
|
| 1654 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 1655 |
|
|
12'b1xxx10110000,
|
| 1656 |
|
|
12'b1xxx10110001,
|
| 1657 |
|
|
12'b1xxx10110010,
|
| 1658 |
|
|
12'b1xxx10110011,
|
| 1659 |
|
|
12'b1xxx10111000,
|
| 1660 |
|
|
12'b1xxx10111001,
|
| 1661 |
|
|
12'b1xxx10111010,
|
| 1662 |
|
|
12'b1xxx10111011: pc_sel = `PC_INT;
|
| 1663 |
|
|
default: pc_sel = `PC_NUL;
|
| 1664 |
|
|
endcase
|
| 1665 |
|
|
end
|
| 1666 |
|
|
`PCA: begin
|
| 1667 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 1668 |
4 |
bsa |
12'b000000010000: pc_sel = (tflg_reg) ? `PC_NUL : `PC_LD;
|
| 1669 |
2 |
bsa |
12'b000000011000,
|
| 1670 |
|
|
12'b0000001xx000,
|
| 1671 |
|
|
12'b000011000011,
|
| 1672 |
|
|
12'b000011001001,
|
| 1673 |
|
|
12'b000011xxx000,
|
| 1674 |
|
|
12'b000011xxx010,
|
| 1675 |
|
|
12'b1xxx01000101,
|
| 1676 |
|
|
12'b1xxx01001101: pc_sel = `PC_LD;
|
| 1677 |
|
|
default: pc_sel = `PC_NUL;
|
| 1678 |
|
|
endcase
|
| 1679 |
|
|
end
|
| 1680 |
|
|
`PCO: begin
|
| 1681 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 1682 |
|
|
12'b000011101001,
|
| 1683 |
|
|
12'b010011101001,
|
| 1684 |
|
|
12'b010111101001,
|
| 1685 |
|
|
12'b1xxx10110000,
|
| 1686 |
|
|
12'b1xxx10110001,
|
| 1687 |
|
|
12'b1xxx10110010,
|
| 1688 |
|
|
12'b1xxx10110011,
|
| 1689 |
|
|
12'b1xxx10111000,
|
| 1690 |
|
|
12'b1xxx10111001,
|
| 1691 |
|
|
12'b1xxx10111010,
|
| 1692 |
4 |
bsa |
12'b1xxx10111011: pc_sel = `PC_LD;
|
| 1693 |
2 |
bsa |
default: pc_sel = `PC_NUL;
|
| 1694 |
|
|
endcase
|
| 1695 |
|
|
end
|
| 1696 |
|
|
`IF1A: begin
|
| 1697 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 1698 |
|
|
12'b1xxx01000101,
|
| 1699 |
|
|
12'b1xxx01001101,
|
| 1700 |
|
|
12'b0001xxxxxxxx: pc_sel = `PC_LD;
|
| 1701 |
|
|
12'b1xxx10110000,
|
| 1702 |
|
|
12'b1xxx10110001,
|
| 1703 |
|
|
12'b1xxx10110010,
|
| 1704 |
|
|
12'b1xxx10110011,
|
| 1705 |
|
|
12'b1xxx10111000,
|
| 1706 |
|
|
12'b1xxx10111001,
|
| 1707 |
|
|
12'b1xxx10111010,
|
| 1708 |
|
|
12'b1xxx10111011: pc_sel = `PC_NILD2;
|
| 1709 |
|
|
default: pc_sel = `PC_NILD;
|
| 1710 |
|
|
endcase
|
| 1711 |
|
|
end
|
| 1712 |
|
|
`HLTA: pc_sel = `PC_INT;
|
| 1713 |
|
|
`DMA1: pc_sel = `PC_DMA;
|
| 1714 |
|
|
default: pc_sel = `PC_NUL;
|
| 1715 |
|
|
endcase
|
| 1716 |
|
|
end
|
| 1717 |
|
|
|
| 1718 |
|
|
/*****************************************************************************************/
|
| 1719 |
|
|
/* */
|
| 1720 |
|
|
/* interrupt ack and dma ack */
|
| 1721 |
|
|
/* */
|
| 1722 |
|
|
/*****************************************************************************************/
|
| 1723 |
|
|
always @ (inst_reg or page_reg or state_reg) begin
|
| 1724 |
|
|
casex (state_reg) //synopsys parallel_case
|
| 1725 |
|
|
`IF1B: begin
|
| 1726 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 1727 |
|
|
12'b1xxx01000101,
|
| 1728 |
|
|
12'b1xxx01001101,
|
| 1729 |
|
|
12'b000011110011,
|
| 1730 |
|
|
12'b0001xxxxxxxx: ld_inta = 1'b0;
|
| 1731 |
|
|
default: ld_inta = 1'b1;
|
| 1732 |
|
|
endcase
|
| 1733 |
|
|
end
|
| 1734 |
|
|
default: ld_inta = 1'b0;
|
| 1735 |
|
|
endcase
|
| 1736 |
|
|
end
|
| 1737 |
|
|
|
| 1738 |
|
|
always @ (inst_reg or page_reg or state_reg) begin
|
| 1739 |
|
|
casex (state_reg) //synopsys parallel_case
|
| 1740 |
|
|
`IF1B: begin
|
| 1741 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 1742 |
|
|
12'b1xxx01000101,
|
| 1743 |
|
|
12'b1xxx01001101,
|
| 1744 |
|
|
12'b000011110011,
|
| 1745 |
|
|
12'b0001xxxxxxxx: ld_dmaa = 1'b0;
|
| 1746 |
|
|
default: ld_dmaa = 1'b1;
|
| 1747 |
|
|
endcase
|
| 1748 |
|
|
end
|
| 1749 |
|
|
`HLTB,
|
| 1750 |
|
|
`DMA2: ld_dmaa = 1'b1;
|
| 1751 |
|
|
default: ld_dmaa = 1'b0;
|
| 1752 |
|
|
endcase
|
| 1753 |
|
|
end
|
| 1754 |
|
|
|
| 1755 |
|
|
/*****************************************************************************************/
|
| 1756 |
|
|
/* */
|
| 1757 |
|
|
/* data input register control */
|
| 1758 |
|
|
/* */
|
| 1759 |
|
|
/*****************************************************************************************/
|
| 1760 |
|
|
always @ (inst_reg or page_reg or state_reg) begin
|
| 1761 |
|
|
casex (state_reg) //synopsys parallel_case
|
| 1762 |
|
|
`OF1B: di_ctl = `DI_DI10;
|
| 1763 |
|
|
`OF2B: begin
|
| 1764 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 1765 |
|
|
12'b010000110110,
|
| 1766 |
|
|
12'b010100110110: di_ctl = `DI_DI0;
|
| 1767 |
|
|
default: di_ctl = `DI_DI1;
|
| 1768 |
|
|
endcase
|
| 1769 |
|
|
end
|
| 1770 |
|
|
`RD1B: di_ctl = `DI_DI0;
|
| 1771 |
|
|
`RD2B: begin
|
| 1772 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 1773 |
|
|
12'b000000101010,
|
| 1774 |
|
|
12'b000011001001,
|
| 1775 |
|
|
12'b010x00101010,
|
| 1776 |
|
|
12'b010x11100001,
|
| 1777 |
|
|
12'b010x11100011,
|
| 1778 |
|
|
12'b000011100011,
|
| 1779 |
|
|
12'b1xxx01000101,
|
| 1780 |
|
|
12'b1xxx01001101,
|
| 1781 |
|
|
12'b1xxx01xx1011,
|
| 1782 |
|
|
12'b000011xxx000,
|
| 1783 |
|
|
12'b000011xx0001,
|
| 1784 |
|
|
12'b0001xxxxxxxx: di_ctl = `DI_DI1;
|
| 1785 |
|
|
default: di_ctl = `DI_DI0;
|
| 1786 |
|
|
endcase
|
| 1787 |
|
|
end
|
| 1788 |
|
|
`INTB: di_ctl = `DI_DI0;
|
| 1789 |
|
|
default: di_ctl = `DI_NUL;
|
| 1790 |
|
|
endcase
|
| 1791 |
|
|
end
|
| 1792 |
|
|
|
| 1793 |
|
|
/*****************************************************************************************/
|
| 1794 |
|
|
/* */
|
| 1795 |
|
|
/* data output register control */
|
| 1796 |
|
|
/* */
|
| 1797 |
|
|
/*****************************************************************************************/
|
| 1798 |
|
|
always @ (inst_reg or page_reg or state_reg) begin
|
| 1799 |
|
|
casex (state_reg) //synopsys parallel_case
|
| 1800 |
|
|
`WR1A: begin
|
| 1801 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 1802 |
|
|
12'b000011001101,
|
| 1803 |
|
|
12'b010x11100101,
|
| 1804 |
|
|
12'b000011xxx100,
|
| 1805 |
|
|
12'b000011xx0101,
|
| 1806 |
|
|
12'b000011xxx111,
|
| 1807 |
|
|
12'b0001xxxxxxxx: do_ctl = `DO_MSB;
|
| 1808 |
|
|
12'b1xxx10100011,
|
| 1809 |
|
|
12'b1xxx10101011,
|
| 1810 |
|
|
12'b1xxx10110011,
|
| 1811 |
|
|
12'b1xxx10111011: do_ctl = `DO_IO;
|
| 1812 |
|
|
default: do_ctl = `DO_LSB;
|
| 1813 |
|
|
endcase
|
| 1814 |
|
|
end
|
| 1815 |
|
|
`WR2A: begin
|
| 1816 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 1817 |
|
|
12'b000000100010,
|
| 1818 |
|
|
12'b010x00100010,
|
| 1819 |
|
|
12'b010x11100011,
|
| 1820 |
|
|
12'b000011100011,
|
| 1821 |
|
|
12'b1xxx01xx0011: do_ctl = `DO_MSB;
|
| 1822 |
|
|
12'b000011010011,
|
| 1823 |
|
|
12'b1xxx0x0xx001,
|
| 1824 |
|
|
12'b1xxx0x10x001,
|
| 1825 |
|
|
12'b1xxx0x111001,
|
| 1826 |
|
|
12'b1xxx10100011,
|
| 1827 |
|
|
12'b1xxx10101011,
|
| 1828 |
|
|
12'b1xxx10110011,
|
| 1829 |
|
|
12'b1xxx10111011: do_ctl = `DO_IO;
|
| 1830 |
|
|
default: do_ctl = `DO_LSB;
|
| 1831 |
|
|
endcase
|
| 1832 |
|
|
end
|
| 1833 |
|
|
default: do_ctl = `DO_NUL;
|
| 1834 |
|
|
endcase
|
| 1835 |
|
|
end
|
| 1836 |
|
|
|
| 1837 |
|
|
/*****************************************************************************************/
|
| 1838 |
|
|
/* */
|
| 1839 |
|
|
/* alu operation control */
|
| 1840 |
|
|
/* */
|
| 1841 |
|
|
/*****************************************************************************************/
|
| 1842 |
|
|
always @ (inst_reg or page_reg or state_reg or carry_bit or par_bit or sign_bit or
|
| 1843 |
|
|
zero_bit) begin
|
| 1844 |
|
|
casex (state_reg) //synopsys parallel_case
|
| 1845 |
|
|
`DEC1: begin
|
| 1846 |
|
|
casex (inst_reg) //synopsys parallel_case
|
| 1847 |
|
|
8'b00xx0011,
|
| 1848 |
|
|
8'b00xx1001,
|
| 1849 |
|
|
8'b00xx1011,
|
| 1850 |
|
|
8'b11100011,
|
| 1851 |
|
|
8'b11xx0101,
|
| 1852 |
|
|
8'b11xxx111: aluop_sel = `ALUOP_ADD;
|
| 1853 |
|
|
8'b10001xxx: aluop_sel = `ALUOP_BADC;
|
| 1854 |
|
|
8'b00010000,
|
| 1855 |
|
|
8'b00xxx100,
|
| 1856 |
|
|
8'b10000xxx: aluop_sel = `ALUOP_BADD;
|
| 1857 |
|
|
8'b10100xxx: aluop_sel = `ALUOP_BAND;
|
| 1858 |
|
|
8'b00xxx101: aluop_sel = `ALUOP_BDEC;
|
| 1859 |
|
|
8'b10110xxx: aluop_sel = `ALUOP_BOR;
|
| 1860 |
|
|
8'b10011xxx: aluop_sel = `ALUOP_BSBC;
|
| 1861 |
|
|
8'b10010xxx,
|
| 1862 |
|
|
8'b10111xxx: aluop_sel = `ALUOP_BSUB;
|
| 1863 |
|
|
8'b00101111,
|
| 1864 |
|
|
8'b10101xxx: aluop_sel = `ALUOP_BXOR;
|
| 1865 |
|
|
8'b00111111: aluop_sel = `ALUOP_CCF;
|
| 1866 |
|
|
8'b00100111: aluop_sel = `ALUOP_DAA;
|
| 1867 |
|
|
8'b00010111: aluop_sel = `ALUOP_RLA;
|
| 1868 |
|
|
8'b00000111: aluop_sel = `ALUOP_RLCA;
|
| 1869 |
|
|
8'b00011111: aluop_sel = `ALUOP_RRA;
|
| 1870 |
|
|
8'b00001111: aluop_sel = `ALUOP_RRCA;
|
| 1871 |
|
|
8'b00110111: aluop_sel = `ALUOP_SCF;
|
| 1872 |
|
|
default: aluop_sel = `ALUOP_PASS;
|
| 1873 |
|
|
endcase
|
| 1874 |
|
|
end
|
| 1875 |
|
|
`IF2B: aluop_sel = `ALUOP_ADD;
|
| 1876 |
|
|
`DEC2: begin
|
| 1877 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 1878 |
|
|
12'b1xxx01xx1010: aluop_sel = `ALUOP_ADC;
|
| 1879 |
|
|
12'b010000100011,
|
| 1880 |
|
|
12'b010000101011,
|
| 1881 |
|
|
12'b010000xx1001,
|
| 1882 |
|
|
12'b010011100101,
|
| 1883 |
|
|
12'b010100100011,
|
| 1884 |
|
|
12'b010100101011,
|
| 1885 |
|
|
12'b010100xx1001,
|
| 1886 |
4 |
bsa |
12'b010111100101: aluop_sel = `ALUOP_ADD;
|
| 1887 |
2 |
bsa |
12'b1xxx01010111,
|
| 1888 |
4 |
bsa |
12'b1xxx01011111: aluop_sel = `ALUOP_APAS;
|
| 1889 |
|
|
12'b010010001100,
|
| 1890 |
|
|
12'b010010001101,
|
| 1891 |
|
|
12'b010110001100,
|
| 1892 |
|
|
12'b010110001101: aluop_sel = `ALUOP_BADC;
|
| 1893 |
|
|
12'b010010000100,
|
| 1894 |
|
|
12'b010010000101,
|
| 1895 |
|
|
12'b010110000100,
|
| 1896 |
|
|
12'b010110000101,
|
| 1897 |
|
|
12'b010000100100,
|
| 1898 |
|
|
12'b010000101100,
|
| 1899 |
|
|
12'b010100100100,
|
| 1900 |
|
|
12'b010100101100: aluop_sel = `ALUOP_BADD;
|
| 1901 |
|
|
12'b010010100100,
|
| 1902 |
|
|
12'b010010100101,
|
| 1903 |
|
|
12'b010110100100,
|
| 1904 |
|
|
12'b010110100101,
|
| 1905 |
2 |
bsa |
12'b001001xxxxxx,
|
| 1906 |
|
|
12'b001010xxxxxx: aluop_sel = `ALUOP_BAND;
|
| 1907 |
4 |
bsa |
12'b010000100101,
|
| 1908 |
|
|
12'b010000101101,
|
| 1909 |
|
|
12'b010100100101,
|
| 1910 |
|
|
12'b010100101101: aluop_sel = `ALUOP_BDEC;
|
| 1911 |
|
|
12'b010010110100,
|
| 1912 |
|
|
12'b010010110101,
|
| 1913 |
|
|
12'b010110110100,
|
| 1914 |
|
|
12'b010110110101,
|
| 1915 |
2 |
bsa |
12'b001011xxxxxx: aluop_sel = `ALUOP_BOR;
|
| 1916 |
4 |
bsa |
12'b010010011100,
|
| 1917 |
|
|
12'b010010011101,
|
| 1918 |
|
|
12'b010110011100,
|
| 1919 |
|
|
12'b010110011101: aluop_sel = `ALUOP_BSBC;
|
| 1920 |
|
|
12'b010010111100,
|
| 1921 |
|
|
12'b010010111101,
|
| 1922 |
|
|
12'b010110111100,
|
| 1923 |
|
|
12'b010110111101,
|
| 1924 |
|
|
12'b010010010100,
|
| 1925 |
|
|
12'b010010010101,
|
| 1926 |
|
|
12'b010110010100,
|
| 1927 |
|
|
12'b010110010101,
|
| 1928 |
2 |
bsa |
12'b1xxx01000100: aluop_sel = `ALUOP_BSUB;
|
| 1929 |
4 |
bsa |
12'b010010101100,
|
| 1930 |
|
|
12'b010010101101,
|
| 1931 |
|
|
12'b010110101100,
|
| 1932 |
|
|
12'b010110101101: aluop_sel = `ALUOP_BXOR;
|
| 1933 |
2 |
bsa |
12'b001000010xxx: aluop_sel = `ALUOP_RL;
|
| 1934 |
|
|
12'b001000000xxx: aluop_sel = `ALUOP_RLC;
|
| 1935 |
|
|
12'b001000011xxx: aluop_sel = `ALUOP_RR;
|
| 1936 |
|
|
12'b001000001xxx: aluop_sel = `ALUOP_RRC;
|
| 1937 |
|
|
12'b1xxx01xx0010: aluop_sel = `ALUOP_SBC;
|
| 1938 |
|
|
12'b001000100xxx: aluop_sel = `ALUOP_SLA;
|
| 1939 |
4 |
bsa |
12'b001000110xxx: aluop_sel = `ALUOP_SLL;
|
| 1940 |
2 |
bsa |
12'b001000101xxx: aluop_sel = `ALUOP_SRA;
|
| 1941 |
|
|
12'b001000111xxx: aluop_sel = `ALUOP_SRL;
|
| 1942 |
|
|
default: aluop_sel = `ALUOP_PASS;
|
| 1943 |
|
|
endcase
|
| 1944 |
|
|
end
|
| 1945 |
|
|
`OF1B: begin
|
| 1946 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 1947 |
|
|
12'b000000100000: aluop_sel = ( !zero_bit) ? `ALUOP_ADS : `ALUOP_ADD;
|
| 1948 |
|
|
12'b000000101000: aluop_sel = ( zero_bit) ? `ALUOP_ADS : `ALUOP_ADD;
|
| 1949 |
|
|
12'b000000110000: aluop_sel = (!carry_bit) ? `ALUOP_ADS : `ALUOP_ADD;
|
| 1950 |
|
|
12'b000000111000: aluop_sel = ( carry_bit) ? `ALUOP_ADS : `ALUOP_ADD;
|
| 1951 |
|
|
12'b000000010000,
|
| 1952 |
|
|
12'b000000011000: aluop_sel = `ALUOP_ADS;
|
| 1953 |
|
|
12'b000000110110: aluop_sel = `ALUOP_PASS;
|
| 1954 |
|
|
default: aluop_sel = `ALUOP_ADD;
|
| 1955 |
|
|
endcase
|
| 1956 |
|
|
end
|
| 1957 |
|
|
`OF2A: begin
|
| 1958 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 1959 |
|
|
12'b010000110110,
|
| 1960 |
|
|
12'b010100110110: aluop_sel = `ALUOP_ADS;
|
| 1961 |
|
|
default: aluop_sel = `ALUOP_ADD;
|
| 1962 |
|
|
endcase
|
| 1963 |
|
|
end
|
| 1964 |
|
|
`OF2B: begin
|
| 1965 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 1966 |
|
|
12'b000000xx0001,
|
| 1967 |
|
|
12'b010000100001,
|
| 1968 |
|
|
12'b010100100001: aluop_sel = `ALUOP_ADD;
|
| 1969 |
|
|
12'b000011000010,
|
| 1970 |
|
|
12'b000011000100: aluop_sel = ( !zero_bit) ? `ALUOP_PASS : `ALUOP_ADD;
|
| 1971 |
|
|
12'b000011001010,
|
| 1972 |
|
|
12'b000011001100: aluop_sel = ( zero_bit) ? `ALUOP_PASS : `ALUOP_ADD;
|
| 1973 |
|
|
12'b000011010010,
|
| 1974 |
|
|
12'b000011010100: aluop_sel = (!carry_bit) ? `ALUOP_PASS : `ALUOP_ADD;
|
| 1975 |
|
|
12'b000011011010,
|
| 1976 |
|
|
12'b000011011100: aluop_sel = ( carry_bit) ? `ALUOP_PASS : `ALUOP_ADD;
|
| 1977 |
|
|
12'b000011100010,
|
| 1978 |
|
|
12'b000011100100: aluop_sel = ( !par_bit) ? `ALUOP_PASS : `ALUOP_ADD;
|
| 1979 |
|
|
12'b000011101010,
|
| 1980 |
|
|
12'b000011101100: aluop_sel = ( par_bit) ? `ALUOP_PASS : `ALUOP_ADD;
|
| 1981 |
|
|
12'b000011110010,
|
| 1982 |
|
|
12'b000011110100: aluop_sel = ( !sign_bit) ? `ALUOP_PASS : `ALUOP_ADD;
|
| 1983 |
|
|
12'b000011111010,
|
| 1984 |
|
|
12'b000011111100: aluop_sel = ( sign_bit) ? `ALUOP_PASS : `ALUOP_ADD;
|
| 1985 |
|
|
default: aluop_sel = `ALUOP_PASS;
|
| 1986 |
|
|
endcase
|
| 1987 |
|
|
end
|
| 1988 |
|
|
`IF3A: aluop_sel = `ALUOP_ADS;
|
| 1989 |
|
|
`ADR1: begin
|
| 1990 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 1991 |
|
|
12'b000000100010,
|
| 1992 |
|
|
12'b000000101010,
|
| 1993 |
|
|
12'b000000110010,
|
| 1994 |
|
|
12'b000000111010,
|
| 1995 |
|
|
12'b000011010011,
|
| 1996 |
|
|
12'b000011011011,
|
| 1997 |
|
|
12'b0001xxxxxxxx,
|
| 1998 |
|
|
12'b010000100010,
|
| 1999 |
|
|
12'b010000101010,
|
| 2000 |
|
|
12'b010100100010,
|
| 2001 |
|
|
12'b010100101010,
|
| 2002 |
|
|
12'b1xxx01xx0011,
|
| 2003 |
|
|
12'b1xxx01xx1011: aluop_sel = `ALUOP_PASS;
|
| 2004 |
|
|
default: aluop_sel = `ALUOP_ADS;
|
| 2005 |
|
|
endcase
|
| 2006 |
|
|
end
|
| 2007 |
|
|
`ADR2: begin
|
| 2008 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2009 |
|
|
12'b1xxx10100000,
|
| 2010 |
|
|
12'b1xxx10100001,
|
| 2011 |
|
|
12'b1xxx10101000,
|
| 2012 |
|
|
12'b1xxx10101001,
|
| 2013 |
|
|
12'b1xxx10110000,
|
| 2014 |
|
|
12'b1xxx10110001,
|
| 2015 |
|
|
12'b1xxx10111000,
|
| 2016 |
|
|
12'b1xxx10111001: aluop_sel = `ALUOP_ADD;
|
| 2017 |
|
|
12'b1xxx10100010,
|
| 2018 |
|
|
12'b1xxx10101010,
|
| 2019 |
|
|
12'b1xxx10110010,
|
| 2020 |
|
|
12'b1xxx10111010: aluop_sel = `ALUOP_BADD;
|
| 2021 |
|
|
12'b1xxx10100011,
|
| 2022 |
|
|
12'b1xxx10101011,
|
| 2023 |
|
|
12'b1xxx10110011,
|
| 2024 |
|
|
12'b1xxx10111011: aluop_sel = `ALUOP_BAND;
|
| 2025 |
|
|
default: aluop_sel = `ALUOP_PASS;
|
| 2026 |
|
|
endcase
|
| 2027 |
|
|
end
|
| 2028 |
|
|
`RD1A: begin
|
| 2029 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2030 |
|
|
12'b1xxx10100000,
|
| 2031 |
|
|
12'b1xxx10100010,
|
| 2032 |
|
|
12'b1xxx10100011,
|
| 2033 |
|
|
12'b1xxx10101000,
|
| 2034 |
|
|
12'b1xxx10101010,
|
| 2035 |
|
|
12'b1xxx10101011,
|
| 2036 |
|
|
12'b1xxx10110000,
|
| 2037 |
|
|
12'b1xxx10110010,
|
| 2038 |
|
|
12'b1xxx10110011,
|
| 2039 |
|
|
12'b1xxx10111000,
|
| 2040 |
|
|
12'b1xxx10111010,
|
| 2041 |
|
|
12'b1xxx10111011: aluop_sel = `ALUOP_PASS;
|
| 2042 |
|
|
default: aluop_sel = `ALUOP_ADD;
|
| 2043 |
|
|
endcase
|
| 2044 |
|
|
end
|
| 2045 |
|
|
`RD1B: begin
|
| 2046 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2047 |
|
|
12'b1xxx10100001,
|
| 2048 |
|
|
12'b1xxx10101001,
|
| 2049 |
|
|
12'b1xxx10110001,
|
| 2050 |
|
|
12'b1xxx10111001: aluop_sel = `ALUOP_BSUB;
|
| 2051 |
|
|
12'b1xxx10100000,
|
| 2052 |
|
|
12'b1xxx10101000,
|
| 2053 |
|
|
12'b1xxx10110000,
|
| 2054 |
|
|
12'b1xxx10111000: aluop_sel = `ALUOP_PASS;
|
| 2055 |
|
|
default: aluop_sel = `ALUOP_BAND;
|
| 2056 |
|
|
endcase
|
| 2057 |
|
|
end
|
| 2058 |
|
|
`RD2A: begin
|
| 2059 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2060 |
|
|
12'b000011001001,
|
| 2061 |
|
|
12'b000011xxx000,
|
| 2062 |
|
|
12'b000011xx0001,
|
| 2063 |
|
|
12'b0001xxxxxxxx,
|
| 2064 |
|
|
12'b010011100001,
|
| 2065 |
|
|
12'b010111100001,
|
| 2066 |
|
|
12'b1xxx01000101,
|
| 2067 |
|
|
12'b1xxx01001101,
|
| 2068 |
|
|
12'b1xxx10100000,
|
| 2069 |
|
|
12'b1xxx10100010,
|
| 2070 |
|
|
12'b1xxx10101000,
|
| 2071 |
|
|
12'b1xxx10101010,
|
| 2072 |
|
|
12'b1xxx10110000,
|
| 2073 |
|
|
12'b1xxx10110010,
|
| 2074 |
|
|
12'b1xxx10111000,
|
| 2075 |
|
|
12'b1xxx10111010: aluop_sel = `ALUOP_ADD;
|
| 2076 |
|
|
default: aluop_sel = `ALUOP_PASS;
|
| 2077 |
|
|
endcase
|
| 2078 |
|
|
end
|
| 2079 |
|
|
`RD2B: begin
|
| 2080 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2081 |
4 |
bsa |
12'b000000xxx100,
|
| 2082 |
2 |
bsa |
12'b010000110100,
|
| 2083 |
|
|
12'b010100110100: aluop_sel = `ALUOP_BADD;
|
| 2084 |
4 |
bsa |
12'b0x1x10xxxxxx,
|
| 2085 |
2 |
bsa |
12'b1xxx10100010,
|
| 2086 |
|
|
12'b1xxx10100011,
|
| 2087 |
|
|
12'b1xxx10101010,
|
| 2088 |
|
|
12'b1xxx10101011,
|
| 2089 |
|
|
12'b1xxx10110010,
|
| 2090 |
|
|
12'b1xxx10110011,
|
| 2091 |
|
|
12'b1xxx10111010,
|
| 2092 |
|
|
12'b1xxx10111011: aluop_sel = `ALUOP_BAND;
|
| 2093 |
4 |
bsa |
12'b000000xxx101,
|
| 2094 |
2 |
bsa |
12'b010000110101,
|
| 2095 |
|
|
12'b010100110101: aluop_sel = `ALUOP_BDEC;
|
| 2096 |
4 |
bsa |
12'b0x1x11xxxxxx: aluop_sel = `ALUOP_BOR;
|
| 2097 |
2 |
bsa |
12'b1xxx10100001,
|
| 2098 |
|
|
12'b1xxx10101001,
|
| 2099 |
|
|
12'b1xxx10110001,
|
| 2100 |
|
|
12'b1xxx10111001: aluop_sel = `ALUOP_BSUB;
|
| 2101 |
|
|
12'b000011001001,
|
| 2102 |
|
|
12'b000011100011,
|
| 2103 |
|
|
12'b000011xxx000,
|
| 2104 |
|
|
12'b0001xxxxxxxx,
|
| 2105 |
|
|
12'b010011100011,
|
| 2106 |
|
|
12'b010111100011,
|
| 2107 |
|
|
12'b1xxx01000101,
|
| 2108 |
|
|
12'b1xxx01001101,
|
| 2109 |
|
|
12'b1xxx10100000,
|
| 2110 |
|
|
12'b1xxx10101000,
|
| 2111 |
|
|
12'b1xxx10110000,
|
| 2112 |
|
|
12'b1xxx10111000: aluop_sel = `ALUOP_PASS;
|
| 2113 |
4 |
bsa |
12'b0x1x00000xxx: aluop_sel = `ALUOP_RLC;
|
| 2114 |
|
|
12'b0x1x00001xxx: aluop_sel = `ALUOP_RRC;
|
| 2115 |
|
|
12'b0x1x00010xxx: aluop_sel = `ALUOP_RL;
|
| 2116 |
|
|
12'b0x1x00011xxx: aluop_sel = `ALUOP_RR;
|
| 2117 |
|
|
12'b0x1x00100xxx: aluop_sel = `ALUOP_SLA;
|
| 2118 |
|
|
12'b0x1x00101xxx: aluop_sel = `ALUOP_SRA;
|
| 2119 |
|
|
12'b0x1x00110xxx: aluop_sel = `ALUOP_SLL;
|
| 2120 |
|
|
12'b0x1x00111xxx: aluop_sel = `ALUOP_SRL;
|
| 2121 |
|
|
12'b1xxx01101111: aluop_sel = `ALUOP_RLD1;
|
| 2122 |
|
|
12'b1xxx01100111: aluop_sel = `ALUOP_RRD1;
|
| 2123 |
2 |
bsa |
default: aluop_sel = `ALUOP_ADD;
|
| 2124 |
|
|
endcase
|
| 2125 |
|
|
end
|
| 2126 |
|
|
`WR1A: begin
|
| 2127 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2128 |
|
|
12'b1xxx10100010,
|
| 2129 |
|
|
12'b1xxx10101010,
|
| 2130 |
|
|
12'b1xxx10110010,
|
| 2131 |
|
|
12'b1xxx10111010: aluop_sel = `ALUOP_PASS;
|
| 2132 |
|
|
default: aluop_sel = `ALUOP_ADD;
|
| 2133 |
|
|
endcase
|
| 2134 |
|
|
end
|
| 2135 |
|
|
`WR1B: begin
|
| 2136 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2137 |
|
|
12'b1xxx10100000,
|
| 2138 |
|
|
12'b1xxx10100010,
|
| 2139 |
|
|
12'b1xxx10100011,
|
| 2140 |
|
|
12'b1xxx10101000,
|
| 2141 |
|
|
12'b1xxx10101010,
|
| 2142 |
|
|
12'b1xxx10101011,
|
| 2143 |
|
|
12'b1xxx10110000,
|
| 2144 |
|
|
12'b1xxx10111000: aluop_sel = `ALUOP_ADD;
|
| 2145 |
|
|
12'b1xxx10110010,
|
| 2146 |
|
|
12'b1xxx10110011,
|
| 2147 |
|
|
12'b1xxx10111010,
|
| 2148 |
|
|
12'b1xxx10111011: aluop_sel = `ALUOP_BADD;
|
| 2149 |
|
|
default: aluop_sel = `ALUOP_PASS;
|
| 2150 |
|
|
endcase
|
| 2151 |
|
|
end
|
| 2152 |
|
|
`WR2A: begin
|
| 2153 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2154 |
|
|
12'b1xxx10100000,
|
| 2155 |
|
|
12'b1xxx10100011,
|
| 2156 |
|
|
12'b1xxx10101000,
|
| 2157 |
|
|
12'b1xxx10101011,
|
| 2158 |
|
|
12'b1xxx10110000,
|
| 2159 |
|
|
12'b1xxx10110011,
|
| 2160 |
|
|
12'b1xxx10111000,
|
| 2161 |
|
|
12'b1xxx10111011: aluop_sel = `ALUOP_ADD;
|
| 2162 |
|
|
12'b000011xxx111,
|
| 2163 |
|
|
12'b0001xxxxxxxx: aluop_sel = `ALUOP_APAS;
|
| 2164 |
|
|
default: aluop_sel = `ALUOP_PASS;
|
| 2165 |
|
|
endcase
|
| 2166 |
|
|
end
|
| 2167 |
|
|
`WR2B: begin
|
| 2168 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2169 |
|
|
12'b1xxx10100010,
|
| 2170 |
|
|
12'b1xxx10100011,
|
| 2171 |
|
|
12'b1xxx10101010,
|
| 2172 |
|
|
12'b1xxx10101011,
|
| 2173 |
|
|
12'b1xxx10110010,
|
| 2174 |
|
|
12'b1xxx10110011,
|
| 2175 |
|
|
12'b1xxx10111010,
|
| 2176 |
|
|
12'b1xxx10111011: aluop_sel = `ALUOP_BADD;
|
| 2177 |
|
|
default: aluop_sel = `ALUOP_ADD;
|
| 2178 |
|
|
endcase
|
| 2179 |
|
|
end
|
| 2180 |
|
|
`IF1A: begin
|
| 2181 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2182 |
|
|
12'b1xxx10100000,
|
| 2183 |
|
|
12'b1xxx10100010,
|
| 2184 |
|
|
12'b1xxx10101000,
|
| 2185 |
|
|
12'b1xxx10101010,
|
| 2186 |
|
|
12'b1xxx10110000,
|
| 2187 |
|
|
12'b1xxx10110010,
|
| 2188 |
|
|
12'b1xxx10111000,
|
| 2189 |
|
|
12'b1xxx10111010: aluop_sel = `ALUOP_ADD;
|
| 2190 |
|
|
12'b000010001xxx,
|
| 2191 |
|
|
12'b000011001110,
|
| 2192 |
|
|
12'b010x10001110: aluop_sel = `ALUOP_BADC;
|
| 2193 |
|
|
12'b000010000xxx,
|
| 2194 |
|
|
12'b000011000110,
|
| 2195 |
|
|
12'b010x10000110,
|
| 2196 |
|
|
12'b1xxx10100011,
|
| 2197 |
|
|
12'b1xxx10101011,
|
| 2198 |
|
|
12'b1xxx10110011,
|
| 2199 |
|
|
12'b1xxx10111011: aluop_sel = `ALUOP_BADD;
|
| 2200 |
|
|
12'b000010100xxx,
|
| 2201 |
4 |
bsa |
12'b0x1x01xxxxxx,
|
| 2202 |
2 |
bsa |
12'b010x10100110,
|
| 2203 |
|
|
12'b000011100110,
|
| 2204 |
|
|
12'b1xxx01xxx000: aluop_sel = `ALUOP_BAND;
|
| 2205 |
|
|
12'b000010110xxx,
|
| 2206 |
|
|
12'b010x10110110,
|
| 2207 |
|
|
12'b000011110110: aluop_sel = `ALUOP_BOR;
|
| 2208 |
|
|
12'b000010011xxx,
|
| 2209 |
|
|
12'b010x10011110,
|
| 2210 |
|
|
12'b000011011110: aluop_sel = `ALUOP_BSBC;
|
| 2211 |
|
|
12'b000010010xxx,
|
| 2212 |
|
|
12'b000010111xxx,
|
| 2213 |
|
|
12'b000011010110,
|
| 2214 |
|
|
12'b010x10010110,
|
| 2215 |
|
|
12'b010x10111110,
|
| 2216 |
|
|
12'b000011111110: aluop_sel = `ALUOP_BSUB;
|
| 2217 |
|
|
12'b000010101xxx,
|
| 2218 |
|
|
12'b010x10101110,
|
| 2219 |
|
|
12'b000011101110: aluop_sel = `ALUOP_BXOR;
|
| 2220 |
|
|
12'b1xxx01101111: aluop_sel = `ALUOP_RLD2;
|
| 2221 |
|
|
12'b1xxx01100111: aluop_sel = `ALUOP_RRD2;
|
| 2222 |
|
|
default: aluop_sel = `ALUOP_PASS;
|
| 2223 |
|
|
endcase
|
| 2224 |
|
|
end
|
| 2225 |
|
|
`INTB: aluop_sel = `ALUOP_PASS;
|
| 2226 |
|
|
default: aluop_sel = `ALUOP_ADD;
|
| 2227 |
|
|
endcase
|
| 2228 |
|
|
end
|
| 2229 |
|
|
|
| 2230 |
|
|
/*****************************************************************************************/
|
| 2231 |
|
|
/* */
|
| 2232 |
|
|
/* alu a input control */
|
| 2233 |
|
|
/* */
|
| 2234 |
|
|
/*****************************************************************************************/
|
| 2235 |
|
|
always @ (inst_reg or page_reg or state_reg or carry_bit or par_bit or sign_bit or
|
| 2236 |
|
|
tflg_reg or zero_bit) begin
|
| 2237 |
|
|
casex (state_reg) //synopsys parallel_case
|
| 2238 |
|
|
`DEC1: begin
|
| 2239 |
|
|
casex (inst_reg) //synopsys parallel_case
|
| 2240 |
|
|
8'b10000xxx,
|
| 2241 |
|
|
8'b10001xxx,
|
| 2242 |
|
|
8'b10010xxx,
|
| 2243 |
|
|
8'b10011xxx,
|
| 2244 |
|
|
8'b10100xxx,
|
| 2245 |
|
|
8'b10101xxx,
|
| 2246 |
|
|
8'b10110xxx,
|
| 2247 |
|
|
8'b10111xxx: alua_sel = `ALUA_AA;
|
| 2248 |
|
|
8'b00100111: alua_sel = `ALUA_DAA;
|
| 2249 |
|
|
8'b00xx1001: alua_sel = `ALUA_HL;
|
| 2250 |
|
|
8'b00010000,
|
| 2251 |
|
|
8'b00101111,
|
| 2252 |
|
|
8'b00xxx101,
|
| 2253 |
|
|
8'b00xx1011,
|
| 2254 |
|
|
8'b11xx0101,
|
| 2255 |
|
|
8'b11xxx111: alua_sel = `ALUA_M1;
|
| 2256 |
|
|
default: alua_sel = `ALUA_ONE;
|
| 2257 |
|
|
endcase
|
| 2258 |
|
|
end
|
| 2259 |
|
|
`DEC2: begin
|
| 2260 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2261 |
4 |
bsa |
12'b001001xxxxxx,
|
| 2262 |
|
|
12'b001010xxxxxx,
|
| 2263 |
|
|
12'b001011xxxxxx: alua_sel = `ALUA_BIT;
|
| 2264 |
2 |
bsa |
12'b1xxx01xx0010,
|
| 2265 |
|
|
12'b1xxx01xx1010: alua_sel = `ALUA_HL;
|
| 2266 |
|
|
12'b1xxx01010111: alua_sel = `ALUA_II;
|
| 2267 |
|
|
12'b010000xx1001: alua_sel = `ALUA_IX;
|
| 2268 |
|
|
12'b010100xx1001: alua_sel = `ALUA_IY;
|
| 2269 |
4 |
bsa |
12'b010000100101,
|
| 2270 |
2 |
bsa |
12'b010000101011,
|
| 2271 |
4 |
bsa |
12'b010000101101,
|
| 2272 |
2 |
bsa |
12'b010011100101,
|
| 2273 |
4 |
bsa |
12'b010100100101,
|
| 2274 |
2 |
bsa |
12'b010100101011,
|
| 2275 |
4 |
bsa |
12'b010100101101,
|
| 2276 |
2 |
bsa |
12'b010111100101: alua_sel = `ALUA_M1;
|
| 2277 |
4 |
bsa |
12'b010000100100,
|
| 2278 |
|
|
12'b010000101100,
|
| 2279 |
2 |
bsa |
12'b010000100011,
|
| 2280 |
4 |
bsa |
12'b010100100100,
|
| 2281 |
|
|
12'b010100101100,
|
| 2282 |
2 |
bsa |
12'b010100100011: alua_sel = `ALUA_ONE;
|
| 2283 |
|
|
12'b1xxx01011111: alua_sel = `ALUA_RR;
|
| 2284 |
|
|
12'b1xxx01000100: alua_sel = `ALUA_ZER;
|
| 2285 |
4 |
bsa |
default: alua_sel = `ALUA_AA;
|
| 2286 |
2 |
bsa |
endcase
|
| 2287 |
|
|
end
|
| 2288 |
|
|
`OF1B: begin
|
| 2289 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2290 |
|
|
12'b000000100000: alua_sel = ( !zero_bit) ? `ALUA_PC : `ALUA_ONE;
|
| 2291 |
|
|
12'b000000101000: alua_sel = ( zero_bit) ? `ALUA_PC : `ALUA_ONE;
|
| 2292 |
|
|
12'b000000110000: alua_sel = (!carry_bit) ? `ALUA_PC : `ALUA_ONE;
|
| 2293 |
|
|
12'b000000111000: alua_sel = ( carry_bit) ? `ALUA_PC : `ALUA_ONE;
|
| 2294 |
|
|
12'b000000010000,
|
| 2295 |
|
|
12'b000000011000: alua_sel = `ALUA_PC;
|
| 2296 |
|
|
default: alua_sel = `ALUA_ONE;
|
| 2297 |
|
|
endcase
|
| 2298 |
|
|
end
|
| 2299 |
|
|
`OF2A: begin
|
| 2300 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2301 |
|
|
12'b010000110110: alua_sel = `ALUA_IX;
|
| 2302 |
|
|
12'b010100110110: alua_sel = `ALUA_IY;
|
| 2303 |
|
|
default: alua_sel = `ALUA_M1;
|
| 2304 |
|
|
endcase
|
| 2305 |
|
|
end
|
| 2306 |
|
|
`IF3A: alua_sel = (page_reg[0]) ? `ALUA_IY : `ALUA_IX;
|
| 2307 |
|
|
`ADR1: alua_sel = (page_reg[2]) ? ((page_reg[0]) ? `ALUA_IY : `ALUA_IX) : `ALUA_M1;
|
| 2308 |
|
|
`ADR2: alua_sel = `ALUA_M1;
|
| 2309 |
|
|
`RD1B: begin
|
| 2310 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2311 |
|
|
12'b1xxx10100001,
|
| 2312 |
|
|
12'b1xxx10101001,
|
| 2313 |
|
|
12'b1xxx10110001,
|
| 2314 |
|
|
12'b1xxx10111001: alua_sel = `ALUA_AA;
|
| 2315 |
|
|
default: alua_sel = `ALUA_M1;
|
| 2316 |
|
|
endcase
|
| 2317 |
|
|
end
|
| 2318 |
|
|
`RD2A: begin
|
| 2319 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2320 |
|
|
12'b0001xxxxxxxx,
|
| 2321 |
|
|
12'b1xxx10101000,
|
| 2322 |
|
|
12'b1xxx10101010,
|
| 2323 |
|
|
12'b1xxx10111000,
|
| 2324 |
|
|
12'b1xxx10111010: alua_sel = `ALUA_M1;
|
| 2325 |
|
|
default: alua_sel = `ALUA_ONE;
|
| 2326 |
|
|
endcase
|
| 2327 |
|
|
end
|
| 2328 |
|
|
`RD2B: begin
|
| 2329 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2330 |
|
|
12'b1xxx01100111,
|
| 2331 |
|
|
12'b1xxx01101111,
|
| 2332 |
|
|
12'b1xxx10100001,
|
| 2333 |
|
|
12'b1xxx10101001,
|
| 2334 |
|
|
12'b1xxx10110001,
|
| 2335 |
|
|
12'b1xxx10111001: alua_sel = `ALUA_AA;
|
| 2336 |
4 |
bsa |
12'b0x1x1xxxxxxx: alua_sel = `ALUA_BIT;
|
| 2337 |
|
|
12'b000000xxx101,
|
| 2338 |
2 |
bsa |
12'b010000110101,
|
| 2339 |
|
|
12'b010100110101,
|
| 2340 |
|
|
12'b1xxx10100010,
|
| 2341 |
|
|
12'b1xxx10100011,
|
| 2342 |
|
|
12'b1xxx10101010,
|
| 2343 |
|
|
12'b1xxx10101011,
|
| 2344 |
|
|
12'b1xxx10110010,
|
| 2345 |
|
|
12'b1xxx10110011,
|
| 2346 |
|
|
12'b1xxx10111010,
|
| 2347 |
|
|
12'b1xxx10111011: alua_sel = `ALUA_M1;
|
| 2348 |
|
|
default: alua_sel = `ALUA_ONE;
|
| 2349 |
|
|
endcase
|
| 2350 |
|
|
end
|
| 2351 |
|
|
`WR1A: begin
|
| 2352 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2353 |
|
|
12'b000000100010,
|
| 2354 |
|
|
12'b000011100011,
|
| 2355 |
|
|
12'b010000100010,
|
| 2356 |
|
|
12'b010011100011,
|
| 2357 |
|
|
12'b010100100010,
|
| 2358 |
|
|
12'b010111100011,
|
| 2359 |
|
|
12'b1xxx01xx0011,
|
| 2360 |
|
|
12'b1xxx10100000,
|
| 2361 |
|
|
12'b1xxx10100011,
|
| 2362 |
|
|
12'b1xxx10110000,
|
| 2363 |
|
|
12'b1xxx10110011: alua_sel = `ALUA_ONE;
|
| 2364 |
|
|
default: alua_sel = `ALUA_M1;
|
| 2365 |
|
|
endcase
|
| 2366 |
|
|
end
|
| 2367 |
|
|
`WR1B: begin
|
| 2368 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2369 |
|
|
12'b1xxx10110000,
|
| 2370 |
|
|
12'b1xxx10110010,
|
| 2371 |
|
|
12'b1xxx10110011,
|
| 2372 |
|
|
12'b1xxx10111000,
|
| 2373 |
|
|
12'b1xxx10111010,
|
| 2374 |
|
|
12'b1xxx10111011: alua_sel = `ALUA_M1;
|
| 2375 |
|
|
default: alua_sel = `ALUA_ONE;
|
| 2376 |
|
|
endcase
|
| 2377 |
|
|
end
|
| 2378 |
|
|
`WR2A: begin
|
| 2379 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2380 |
|
|
12'b0001xxxxxxxx: alua_sel = `ALUA_INT;
|
| 2381 |
|
|
12'b1xxx10101000,
|
| 2382 |
|
|
12'b1xxx10101011,
|
| 2383 |
|
|
12'b1xxx10111000,
|
| 2384 |
|
|
12'b1xxx10111011: alua_sel = `ALUA_M1;
|
| 2385 |
|
|
12'b000011xxx111: alua_sel = `ALUA_RST;
|
| 2386 |
|
|
default: alua_sel = `ALUA_ONE;
|
| 2387 |
|
|
endcase
|
| 2388 |
|
|
end
|
| 2389 |
|
|
`WR2B: begin
|
| 2390 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2391 |
|
|
12'b1xxx10100000,
|
| 2392 |
|
|
12'b1xxx10100010,
|
| 2393 |
|
|
12'b1xxx10100011,
|
| 2394 |
|
|
12'b1xxx10101000,
|
| 2395 |
|
|
12'b1xxx10101010,
|
| 2396 |
|
|
12'b1xxx10101011,
|
| 2397 |
|
|
12'b1xxx10110000,
|
| 2398 |
|
|
12'b1xxx10110010,
|
| 2399 |
|
|
12'b1xxx10110011,
|
| 2400 |
|
|
12'b1xxx10111000,
|
| 2401 |
|
|
12'b1xxx10111010,
|
| 2402 |
|
|
12'b1xxx10111011: alua_sel = `ALUA_M1;
|
| 2403 |
|
|
default: alua_sel = `ALUA_ONE;
|
| 2404 |
|
|
endcase
|
| 2405 |
|
|
end
|
| 2406 |
|
|
`BLK1: begin
|
| 2407 |
|
|
alua_sel = (inst_reg[3]) ? `ALUA_M1 : `ALUA_ONE;
|
| 2408 |
|
|
end
|
| 2409 |
|
|
`BLK2: begin
|
| 2410 |
|
|
alua_sel = (inst_reg[4]) ? `ALUA_M1 : `ALUA_ONE;
|
| 2411 |
|
|
end
|
| 2412 |
|
|
`PCA: alua_sel = (tflg_reg) ? `ALUA_ZER : `ALUA_M2;
|
| 2413 |
|
|
`IF1A: begin
|
| 2414 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2415 |
4 |
bsa |
12'b0x1x01xxxxxx: alua_sel = `ALUA_BIT;
|
| 2416 |
2 |
bsa |
12'b1xxx01xxx000,
|
| 2417 |
|
|
12'b1xxx10100011,
|
| 2418 |
|
|
12'b1xxx10101000,
|
| 2419 |
|
|
12'b1xxx10101010,
|
| 2420 |
|
|
12'b1xxx10101011,
|
| 2421 |
|
|
12'b1xxx10110011,
|
| 2422 |
|
|
12'b1xxx10111000,
|
| 2423 |
|
|
12'b1xxx10111010,
|
| 2424 |
|
|
12'b1xxx10111011: alua_sel = `ALUA_M1;
|
| 2425 |
|
|
12'b1xxx10100000,
|
| 2426 |
|
|
12'b1xxx10100010,
|
| 2427 |
|
|
12'b1xxx10110000,
|
| 2428 |
|
|
12'b1xxx10110010: alua_sel = `ALUA_ONE;
|
| 2429 |
|
|
default: alua_sel = `ALUA_AA;
|
| 2430 |
|
|
endcase
|
| 2431 |
|
|
end
|
| 2432 |
|
|
`INTA: alua_sel = `ALUA_M1;
|
| 2433 |
|
|
default: alua_sel = `ALUA_ONE;
|
| 2434 |
|
|
endcase
|
| 2435 |
|
|
end
|
| 2436 |
|
|
|
| 2437 |
|
|
/*****************************************************************************************/
|
| 2438 |
|
|
/* */
|
| 2439 |
|
|
/* alu b input control */
|
| 2440 |
|
|
/* */
|
| 2441 |
|
|
/*****************************************************************************************/
|
| 2442 |
|
|
always @ (inst_reg or page_reg or state_reg or carry_bit or par_bit or sign_bit or
|
| 2443 |
|
|
zero_bit) begin
|
| 2444 |
|
|
casex (state_reg) //synopsys parallel_case
|
| 2445 |
|
|
`DEC1: begin
|
| 2446 |
|
|
casex (inst_reg) //synopsys parallel_case
|
| 2447 |
|
|
8'b00000111,
|
| 2448 |
|
|
8'b00001111,
|
| 2449 |
|
|
8'b00010111,
|
| 2450 |
|
|
8'b00011111,
|
| 2451 |
|
|
8'b00100111,
|
| 2452 |
|
|
8'b00101111: alub_sel = `ALUB_AA;
|
| 2453 |
|
|
8'b00010000: alub_sel = `ALUB_BB;
|
| 2454 |
|
|
8'b00000010,
|
| 2455 |
|
|
8'b00001010: alub_sel = `ALUB_BC;
|
| 2456 |
|
|
8'b00010010,
|
| 2457 |
|
|
8'b00011010,
|
| 2458 |
|
|
8'b11101011: alub_sel = `ALUB_DE;
|
| 2459 |
|
|
8'b11101001,
|
| 2460 |
|
|
8'b11111001: alub_sel = `ALUB_HL;
|
| 2461 |
|
|
8'b01xxx000,
|
| 2462 |
|
|
8'b10xxx000: alub_sel = `ALUB_BB;
|
| 2463 |
|
|
8'b01xxx001,
|
| 2464 |
|
|
8'b10xxx001: alub_sel = `ALUB_CC;
|
| 2465 |
|
|
8'b01xxx010,
|
| 2466 |
|
|
8'b10xxx010: alub_sel = `ALUB_DD;
|
| 2467 |
|
|
8'b01xxx011,
|
| 2468 |
|
|
8'b10xxx011: alub_sel = `ALUB_EE;
|
| 2469 |
|
|
8'b01xxx100,
|
| 2470 |
|
|
8'b10xxx100: alub_sel = `ALUB_HH;
|
| 2471 |
|
|
8'b01xxx101,
|
| 2472 |
|
|
8'b10xxx101: alub_sel = `ALUB_LL;
|
| 2473 |
|
|
8'b01xxx111,
|
| 2474 |
|
|
8'b10xxx111: alub_sel = `ALUB_AA;
|
| 2475 |
|
|
8'b0000010x: alub_sel = `ALUB_BB;
|
| 2476 |
|
|
8'b0000110x: alub_sel = `ALUB_CC;
|
| 2477 |
|
|
8'b0001010x: alub_sel = `ALUB_DD;
|
| 2478 |
|
|
8'b0001110x: alub_sel = `ALUB_EE;
|
| 2479 |
|
|
8'b0010010x: alub_sel = `ALUB_HH;
|
| 2480 |
|
|
8'b0010110x: alub_sel = `ALUB_LL;
|
| 2481 |
|
|
8'b0011110x: alub_sel = `ALUB_AA;
|
| 2482 |
|
|
8'b00000011,
|
| 2483 |
|
|
8'b00001001,
|
| 2484 |
|
|
8'b00001011: alub_sel = `ALUB_BC;
|
| 2485 |
|
|
8'b00010011,
|
| 2486 |
|
|
8'b00011001,
|
| 2487 |
|
|
8'b00011011: alub_sel = `ALUB_DE;
|
| 2488 |
|
|
8'b00100011,
|
| 2489 |
|
|
8'b00101001,
|
| 2490 |
|
|
8'b00101011: alub_sel = `ALUB_HL;
|
| 2491 |
|
|
8'b00110011,
|
| 2492 |
|
|
8'b00111001,
|
| 2493 |
|
|
8'b00111011: alub_sel = `ALUB_SP;
|
| 2494 |
|
|
8'b11xx0101,
|
| 2495 |
|
|
8'b11xxx111: alub_sel = `ALUB_SP;
|
| 2496 |
|
|
default: alub_sel = `ALUB_PC;
|
| 2497 |
|
|
endcase
|
| 2498 |
|
|
end
|
| 2499 |
|
|
`IF2B: alub_sel = `ALUB_PC;
|
| 2500 |
|
|
`DEC2: begin
|
| 2501 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2502 |
|
|
12'b1xxx01000100,
|
| 2503 |
|
|
12'b1xxx01000111,
|
| 2504 |
|
|
12'b1xxx01001111: alub_sel = `ALUB_AA;
|
| 2505 |
|
|
12'b1xxx01xxx000,
|
| 2506 |
|
|
12'b1xxx01xxx001,
|
| 2507 |
|
|
12'b1xxx10100010,
|
| 2508 |
|
|
12'b1xxx10101010,
|
| 2509 |
|
|
12'b1xxx10110010,
|
| 2510 |
|
|
12'b1xxx10111010: alub_sel = `ALUB_BC;
|
| 2511 |
|
|
12'b010000100011,
|
| 2512 |
|
|
12'b010000101011,
|
| 2513 |
|
|
12'b010011101001,
|
| 2514 |
|
|
12'b010011111001: alub_sel = `ALUB_IX;
|
| 2515 |
4 |
bsa |
12'b010000100100,
|
| 2516 |
|
|
12'b010000100101,
|
| 2517 |
|
|
12'b0100010xx100,12'b01000110x100,12'b010001111100,
|
| 2518 |
|
|
12'b010010000100,
|
| 2519 |
|
|
12'b010010001100,
|
| 2520 |
|
|
12'b010010010100,
|
| 2521 |
|
|
12'b010010011100,
|
| 2522 |
|
|
12'b010010100100,
|
| 2523 |
|
|
12'b010010101100,
|
| 2524 |
|
|
12'b010010110100,
|
| 2525 |
|
|
12'b010010111100: alub_sel = `ALUB_IXH;
|
| 2526 |
|
|
12'b010100100100,
|
| 2527 |
|
|
12'b010100100101,
|
| 2528 |
|
|
12'b0101010xx100,12'b01010110x100,12'b010101111100,
|
| 2529 |
|
|
12'b010110000100,
|
| 2530 |
|
|
12'b010110001100,
|
| 2531 |
|
|
12'b010110010100,
|
| 2532 |
|
|
12'b010110011100,
|
| 2533 |
|
|
12'b010110100100,
|
| 2534 |
|
|
12'b010110101100,
|
| 2535 |
|
|
12'b010110110100,
|
| 2536 |
|
|
12'b010110111100: alub_sel = `ALUB_IYH;
|
| 2537 |
|
|
12'b010000101100,
|
| 2538 |
|
|
12'b010000101101,
|
| 2539 |
|
|
12'b0100010xx101,12'b01000110x101,12'b010001111101,
|
| 2540 |
|
|
12'b010010000101,
|
| 2541 |
|
|
12'b010010001101,
|
| 2542 |
|
|
12'b010010010101,
|
| 2543 |
|
|
12'b010010011101,
|
| 2544 |
|
|
12'b010010100101,
|
| 2545 |
|
|
12'b010010101101,
|
| 2546 |
|
|
12'b010010110101,
|
| 2547 |
|
|
12'b010010111101: alub_sel = `ALUB_IXL;
|
| 2548 |
|
|
12'b010100101100,
|
| 2549 |
|
|
12'b010100101101,
|
| 2550 |
|
|
12'b0101010xx101,12'b01010110x101,12'b010101111101,
|
| 2551 |
|
|
12'b010110000101,
|
| 2552 |
|
|
12'b010110001101,
|
| 2553 |
|
|
12'b010110010101,
|
| 2554 |
|
|
12'b010110011101,
|
| 2555 |
|
|
12'b010110100101,
|
| 2556 |
|
|
12'b010110101101,
|
| 2557 |
|
|
12'b010110110101,
|
| 2558 |
|
|
12'b010110111101: alub_sel = `ALUB_IYL;
|
| 2559 |
2 |
bsa |
12'b010100100011,
|
| 2560 |
|
|
12'b010100101011,
|
| 2561 |
|
|
12'b010111101001,
|
| 2562 |
|
|
12'b010111111001: alub_sel = `ALUB_IY;
|
| 2563 |
|
|
12'b1xxx01000101,
|
| 2564 |
|
|
12'b1xxx01001101: alub_sel = `ALUB_PC;
|
| 2565 |
4 |
bsa |
12'b010x0110x000,
|
| 2566 |
|
|
12'b0010xxxxx000: alub_sel = `ALUB_BB;
|
| 2567 |
|
|
12'b010x0110x001,
|
| 2568 |
|
|
12'b0010xxxxx001: alub_sel = `ALUB_CC;
|
| 2569 |
|
|
12'b010x0110x010,
|
| 2570 |
|
|
12'b0010xxxxx010: alub_sel = `ALUB_DD;
|
| 2571 |
|
|
12'b010x0110x011,
|
| 2572 |
|
|
12'b0010xxxxx011: alub_sel = `ALUB_EE;
|
| 2573 |
|
|
12'b0010xxxxx100: alub_sel = `ALUB_HH;
|
| 2574 |
|
|
12'b0010xxxxx101: alub_sel = `ALUB_LL;
|
| 2575 |
|
|
12'b010x0110x111,
|
| 2576 |
|
|
12'b0010xxxxx111: alub_sel = `ALUB_AA;
|
| 2577 |
2 |
bsa |
12'b1xxx0100x010: alub_sel = `ALUB_BC;
|
| 2578 |
|
|
12'b1xxx0101x010: alub_sel = `ALUB_DE;
|
| 2579 |
|
|
12'b1xxx0111x010: alub_sel = `ALUB_SP;
|
| 2580 |
|
|
12'b010011100101,
|
| 2581 |
|
|
12'b010111100101: alub_sel = `ALUB_SP;
|
| 2582 |
|
|
12'b010x00001001: alub_sel = `ALUB_BC;
|
| 2583 |
|
|
12'b010x00011001: alub_sel = `ALUB_DE;
|
| 2584 |
4 |
bsa |
12'b010000101001: alub_sel = `ALUB_IX;
|
| 2585 |
|
|
12'b010100101001: alub_sel = `ALUB_IY;
|
| 2586 |
2 |
bsa |
12'b010x00111001: alub_sel = `ALUB_SP;
|
| 2587 |
|
|
default: alub_sel = `ALUB_HL;
|
| 2588 |
|
|
endcase
|
| 2589 |
|
|
end
|
| 2590 |
|
|
`OF1B: begin
|
| 2591 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2592 |
|
|
12'b000000010000,
|
| 2593 |
|
|
12'b000000011000,
|
| 2594 |
|
|
12'b000000110110: alub_sel = `ALUB_DIN;
|
| 2595 |
|
|
12'b000000100000: alub_sel = ( !zero_bit) ? `ALUB_DIN : `ALUB_PC;
|
| 2596 |
|
|
12'b000000101000: alub_sel = ( zero_bit) ? `ALUB_DIN : `ALUB_PC;
|
| 2597 |
|
|
12'b000000110000: alub_sel = (!carry_bit) ? `ALUB_DIN : `ALUB_PC;
|
| 2598 |
|
|
12'b000000111000: alub_sel = ( carry_bit) ? `ALUB_DIN : `ALUB_PC;
|
| 2599 |
|
|
default: alub_sel = `ALUB_PC;
|
| 2600 |
|
|
endcase
|
| 2601 |
|
|
end
|
| 2602 |
|
|
`OF2A: begin
|
| 2603 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2604 |
|
|
12'b010000110110,
|
| 2605 |
|
|
12'b010100110110: alub_sel = `ALUB_DIN;
|
| 2606 |
|
|
default: alub_sel = `ALUB_SP;
|
| 2607 |
|
|
endcase
|
| 2608 |
|
|
end
|
| 2609 |
|
|
`OF2B: begin
|
| 2610 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2611 |
|
|
12'b000011000011,
|
| 2612 |
|
|
12'b010000110110,
|
| 2613 |
|
|
12'b010100110110: alub_sel = `ALUB_DIN;
|
| 2614 |
|
|
12'b000011000010: alub_sel = ( !zero_bit) ? `ALUB_DIN : `ALUB_PC;
|
| 2615 |
|
|
12'b000011001010: alub_sel = ( zero_bit) ? `ALUB_DIN : `ALUB_PC;
|
| 2616 |
|
|
12'b000011010010: alub_sel = (!carry_bit) ? `ALUB_DIN : `ALUB_PC;
|
| 2617 |
|
|
12'b000011011010: alub_sel = ( carry_bit) ? `ALUB_DIN : `ALUB_PC;
|
| 2618 |
|
|
12'b000011100010: alub_sel = ( !par_bit) ? `ALUB_DIN : `ALUB_PC;
|
| 2619 |
|
|
12'b000011101010: alub_sel = ( par_bit) ? `ALUB_DIN : `ALUB_PC;
|
| 2620 |
|
|
12'b000011110010: alub_sel = ( !sign_bit) ? `ALUB_DIN : `ALUB_PC;
|
| 2621 |
|
|
12'b000011111010: alub_sel = ( sign_bit) ? `ALUB_DIN : `ALUB_PC;
|
| 2622 |
|
|
12'b000011001101: alub_sel = `ALUB_PCH;
|
| 2623 |
|
|
12'b000011000100: alub_sel = ( !zero_bit) ? `ALUB_PCH : `ALUB_PC;
|
| 2624 |
|
|
12'b000011001100: alub_sel = ( zero_bit) ? `ALUB_PCH : `ALUB_PC;
|
| 2625 |
|
|
12'b000011010100: alub_sel = (!carry_bit) ? `ALUB_PCH : `ALUB_PC;
|
| 2626 |
|
|
12'b000011011100: alub_sel = ( carry_bit) ? `ALUB_PCH : `ALUB_PC;
|
| 2627 |
|
|
12'b000011100100: alub_sel = ( !par_bit) ? `ALUB_PCH : `ALUB_PC;
|
| 2628 |
|
|
12'b000011101100: alub_sel = ( par_bit) ? `ALUB_PCH : `ALUB_PC;
|
| 2629 |
|
|
12'b000011110100: alub_sel = ( !sign_bit) ? `ALUB_PCH : `ALUB_PC;
|
| 2630 |
|
|
12'b000011111100: alub_sel = ( sign_bit) ? `ALUB_PCH : `ALUB_PC;
|
| 2631 |
|
|
default: alub_sel = `ALUB_PC;
|
| 2632 |
|
|
endcase
|
| 2633 |
|
|
end
|
| 2634 |
|
|
`IF3A: alub_sel = `ALUB_DIN;
|
| 2635 |
|
|
`ADR1: begin
|
| 2636 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2637 |
|
|
12'b000011010011,
|
| 2638 |
|
|
12'b000011011011: alub_sel = `ALUB_IO;
|
| 2639 |
|
|
12'b0001xxxxxxxx: alub_sel = `ALUB_TMP;
|
| 2640 |
|
|
default: alub_sel = `ALUB_DIN;
|
| 2641 |
|
|
endcase
|
| 2642 |
|
|
end
|
| 2643 |
|
|
`ADR2: begin
|
| 2644 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2645 |
|
|
12'b000000000010,
|
| 2646 |
|
|
12'b000000010010,
|
| 2647 |
|
|
12'b000000110010,
|
| 2648 |
|
|
12'b000011010011: alub_sel = `ALUB_AA;
|
| 2649 |
|
|
12'b1xxx10100010,
|
| 2650 |
|
|
12'b1xxx10100011,
|
| 2651 |
|
|
12'b1xxx10101010,
|
| 2652 |
|
|
12'b1xxx10101011,
|
| 2653 |
|
|
12'b1xxx10110010,
|
| 2654 |
|
|
12'b1xxx10110011,
|
| 2655 |
|
|
12'b1xxx10111010,
|
| 2656 |
|
|
12'b1xxx10111011: alub_sel = `ALUB_BB;
|
| 2657 |
|
|
12'b1xxx10100000,
|
| 2658 |
|
|
12'b1xxx10100001,
|
| 2659 |
|
|
12'b1xxx10101000,
|
| 2660 |
|
|
12'b1xxx10101001,
|
| 2661 |
|
|
12'b1xxx10110000,
|
| 2662 |
|
|
12'b1xxx10110001,
|
| 2663 |
|
|
12'b1xxx10111000,
|
| 2664 |
|
|
12'b1xxx10111001: alub_sel = `ALUB_BC;
|
| 2665 |
|
|
12'b010000100010: alub_sel = `ALUB_IX;
|
| 2666 |
|
|
12'b010011100101: alub_sel = `ALUB_IXH;
|
| 2667 |
|
|
12'b010100100010: alub_sel = `ALUB_IY;
|
| 2668 |
|
|
12'b010111100101: alub_sel = `ALUB_IYH;
|
| 2669 |
|
|
12'b000011xxx111: alub_sel = `ALUB_PCH;
|
| 2670 |
|
|
12'b000001xxx000,
|
| 2671 |
|
|
12'b010x01110000,
|
| 2672 |
|
|
12'b1xxx01000001: alub_sel = `ALUB_BB;
|
| 2673 |
|
|
12'b000001xxx001,
|
| 2674 |
|
|
12'b010x01110001,
|
| 2675 |
|
|
12'b1xxx01001001: alub_sel = `ALUB_CC;
|
| 2676 |
|
|
12'b000001xxx010,
|
| 2677 |
|
|
12'b010x01110010,
|
| 2678 |
|
|
12'b1xxx01010001: alub_sel = `ALUB_DD;
|
| 2679 |
|
|
12'b000001xxx011,
|
| 2680 |
|
|
12'b010x01110011,
|
| 2681 |
|
|
12'b1xxx01011001: alub_sel = `ALUB_EE;
|
| 2682 |
|
|
12'b000001xxx100,
|
| 2683 |
|
|
12'b010x01110100,
|
| 2684 |
|
|
12'b1xxx01100001: alub_sel = `ALUB_HH;
|
| 2685 |
|
|
12'b000001xxx101,
|
| 2686 |
|
|
12'b010x01110101,
|
| 2687 |
|
|
12'b1xxx01101001: alub_sel = `ALUB_LL;
|
| 2688 |
|
|
12'b000001xxx111,
|
| 2689 |
|
|
12'b010x01110111,
|
| 2690 |
|
|
12'b1xxx01111001: alub_sel = `ALUB_AA;
|
| 2691 |
|
|
12'b1xxx01000011: alub_sel = `ALUB_BC;
|
| 2692 |
|
|
12'b1xxx01010011: alub_sel = `ALUB_DE;
|
| 2693 |
|
|
12'b1xxx01110011: alub_sel = `ALUB_SP;
|
| 2694 |
|
|
12'b000011000101: alub_sel = `ALUB_BB;
|
| 2695 |
|
|
12'b000011010101: alub_sel = `ALUB_DD;
|
| 2696 |
|
|
12'b000011100101: alub_sel = `ALUB_HH;
|
| 2697 |
|
|
12'b000011110101: alub_sel = `ALUB_AA;
|
| 2698 |
|
|
default: alub_sel = `ALUB_HL;
|
| 2699 |
|
|
endcase
|
| 2700 |
|
|
end
|
| 2701 |
|
|
`RD1A: begin
|
| 2702 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2703 |
|
|
12'b1xxx10100011,
|
| 2704 |
|
|
12'b1xxx10101011,
|
| 2705 |
|
|
12'b1xxx10110011,
|
| 2706 |
|
|
12'b1xxx10111011: alub_sel = `ALUB_BC;
|
| 2707 |
|
|
12'b1xxx10100000,
|
| 2708 |
|
|
12'b1xxx10101000,
|
| 2709 |
|
|
12'b1xxx10110000,
|
| 2710 |
|
|
12'b1xxx10111000: alub_sel = `ALUB_DE;
|
| 2711 |
|
|
12'b1xxx10100001,
|
| 2712 |
|
|
12'b1xxx10100010,
|
| 2713 |
|
|
12'b1xxx10101001,
|
| 2714 |
|
|
12'b1xxx10101010,
|
| 2715 |
|
|
12'b1xxx10110001,
|
| 2716 |
|
|
12'b1xxx10110010,
|
| 2717 |
|
|
12'b1xxx10111001,
|
| 2718 |
|
|
12'b1xxx10111010: alub_sel = `ALUB_HL;
|
| 2719 |
|
|
12'b000000101010,
|
| 2720 |
|
|
12'b0001xxxxxxxx,
|
| 2721 |
|
|
12'b010000101010,
|
| 2722 |
|
|
12'b010100101010,
|
| 2723 |
|
|
12'b1xxx01xx1011: alub_sel = `ALUB_TMP;
|
| 2724 |
|
|
default: alub_sel = `ALUB_SP;
|
| 2725 |
|
|
endcase
|
| 2726 |
|
|
end
|
| 2727 |
|
|
`RD1B: alub_sel = `ALUB_DIN;
|
| 2728 |
|
|
`RD2A: begin
|
| 2729 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2730 |
|
|
12'b1xxx10100011,
|
| 2731 |
|
|
12'b1xxx10101011,
|
| 2732 |
|
|
12'b1xxx10110011,
|
| 2733 |
|
|
12'b1xxx10111011: alub_sel = `ALUB_BC;
|
| 2734 |
|
|
12'b1xxx10100000,
|
| 2735 |
|
|
12'b1xxx10101000,
|
| 2736 |
|
|
12'b1xxx10110000,
|
| 2737 |
|
|
12'b1xxx10111000: alub_sel = `ALUB_DE;
|
| 2738 |
4 |
bsa |
12'b001010xxxxxx,
|
| 2739 |
2 |
bsa |
12'b1xxx10100001,
|
| 2740 |
|
|
12'b1xxx10100010,
|
| 2741 |
|
|
12'b1xxx10101001,
|
| 2742 |
|
|
12'b1xxx10101010,
|
| 2743 |
|
|
12'b1xxx10110001,
|
| 2744 |
|
|
12'b1xxx10110010,
|
| 2745 |
|
|
12'b1xxx10111001,
|
| 2746 |
|
|
12'b1xxx10111010: alub_sel = `ALUB_HL;
|
| 2747 |
|
|
12'b000011001001,
|
| 2748 |
|
|
12'b000011100011,
|
| 2749 |
|
|
12'b000011xxx000,
|
| 2750 |
|
|
12'b000011xx0001,
|
| 2751 |
|
|
12'b0001xxxxxxxx,
|
| 2752 |
|
|
12'b010011100001,
|
| 2753 |
|
|
12'b010011100011,
|
| 2754 |
|
|
12'b010111100001,
|
| 2755 |
|
|
12'b010111100011,
|
| 2756 |
|
|
12'b1xxx01000101,
|
| 2757 |
|
|
12'b1xxx01001101: alub_sel = `ALUB_SP;
|
| 2758 |
|
|
default: alub_sel = `ALUB_TMP;
|
| 2759 |
|
|
endcase
|
| 2760 |
|
|
end
|
| 2761 |
|
|
`RD2B: begin
|
| 2762 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2763 |
|
|
12'b000011100011: alub_sel = `ALUB_HL;
|
| 2764 |
|
|
12'b010011100011: alub_sel = `ALUB_IX;
|
| 2765 |
|
|
12'b010111100011: alub_sel = `ALUB_IY;
|
| 2766 |
|
|
12'b000000001010,
|
| 2767 |
|
|
12'b000000011010,
|
| 2768 |
|
|
12'b000000101010,
|
| 2769 |
|
|
12'b000000111010,
|
| 2770 |
4 |
bsa |
12'b000001xxxxxx,
|
| 2771 |
|
|
12'b000010000xxx,
|
| 2772 |
|
|
12'b000010001xxx,
|
| 2773 |
|
|
12'b000010010xxx,
|
| 2774 |
|
|
12'b000010011xxx,
|
| 2775 |
|
|
12'b000010100xxx,
|
| 2776 |
|
|
12'b000010101xxx,
|
| 2777 |
|
|
12'b000010110xxx,
|
| 2778 |
|
|
12'b000010111xxx,
|
| 2779 |
2 |
bsa |
12'b000011011011,
|
| 2780 |
|
|
12'b000011xx0001,
|
| 2781 |
|
|
12'b001001xxx110,
|
| 2782 |
|
|
12'b001001xxxxxx,
|
| 2783 |
|
|
12'b010000101010,
|
| 2784 |
|
|
12'b010001xxx110,
|
| 2785 |
|
|
12'b010010000110,
|
| 2786 |
|
|
12'b010010001110,
|
| 2787 |
|
|
12'b010010010110,
|
| 2788 |
|
|
12'b010010011110,
|
| 2789 |
|
|
12'b010010100110,
|
| 2790 |
|
|
12'b010010101110,
|
| 2791 |
|
|
12'b010010110110,
|
| 2792 |
|
|
12'b010010111110,
|
| 2793 |
|
|
12'b010011100001,
|
| 2794 |
|
|
12'b010100101010,
|
| 2795 |
|
|
12'b010101xxx110,
|
| 2796 |
|
|
12'b010110000110,
|
| 2797 |
|
|
12'b010110001110,
|
| 2798 |
|
|
12'b010110010110,
|
| 2799 |
|
|
12'b010110011110,
|
| 2800 |
|
|
12'b010110100110,
|
| 2801 |
|
|
12'b010110101110,
|
| 2802 |
|
|
12'b010110110110,
|
| 2803 |
|
|
12'b010110111110,
|
| 2804 |
|
|
12'b010111100001,
|
| 2805 |
|
|
12'b011001xxx110,
|
| 2806 |
|
|
12'b011101xxx110,
|
| 2807 |
|
|
12'b1xxx01xxx000,
|
| 2808 |
|
|
12'b1xxx01xx1011: alub_sel = `ALUB_PC;
|
| 2809 |
|
|
12'b0001xxxxxxxx: alub_sel = `ALUB_PCH;
|
| 2810 |
|
|
default: alub_sel = `ALUB_DIN;
|
| 2811 |
|
|
endcase
|
| 2812 |
|
|
end
|
| 2813 |
|
|
`WR1A: begin
|
| 2814 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2815 |
|
|
12'b1xxx10100010,
|
| 2816 |
|
|
12'b1xxx10101010,
|
| 2817 |
|
|
12'b1xxx10110010,
|
| 2818 |
|
|
12'b1xxx10111010: alub_sel = `ALUB_BC;
|
| 2819 |
|
|
12'b1xxx10100000,
|
| 2820 |
|
|
12'b1xxx10100011,
|
| 2821 |
|
|
12'b1xxx10101000,
|
| 2822 |
|
|
12'b1xxx10101011,
|
| 2823 |
|
|
12'b1xxx10110000,
|
| 2824 |
|
|
12'b1xxx10110011,
|
| 2825 |
|
|
12'b1xxx10111000,
|
| 2826 |
|
|
12'b1xxx10111011: alub_sel = `ALUB_HL;
|
| 2827 |
|
|
12'b000000100010,
|
| 2828 |
|
|
12'b010000100010,
|
| 2829 |
|
|
12'b010100100010,
|
| 2830 |
|
|
12'b1xxx01xx0011: alub_sel = `ALUB_TMP;
|
| 2831 |
|
|
default: alub_sel = `ALUB_SP;
|
| 2832 |
|
|
endcase
|
| 2833 |
|
|
end
|
| 2834 |
|
|
`WR1B: begin
|
| 2835 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2836 |
|
|
12'b1xxx10110010,
|
| 2837 |
|
|
12'b1xxx10110011,
|
| 2838 |
|
|
12'b1xxx10111010,
|
| 2839 |
|
|
12'b1xxx10111011: alub_sel = `ALUB_BB;
|
| 2840 |
|
|
12'b1xxx10110000,
|
| 2841 |
|
|
12'b1xxx10111000: alub_sel = `ALUB_BC;
|
| 2842 |
|
|
12'b000000100010,
|
| 2843 |
|
|
12'b000011100011: alub_sel = `ALUB_HH;
|
| 2844 |
|
|
12'b010011100101: alub_sel = `ALUB_IX;
|
| 2845 |
|
|
12'b010000100010,
|
| 2846 |
|
|
12'b010011100011: alub_sel = `ALUB_IXH;
|
| 2847 |
|
|
12'b010111100101: alub_sel = `ALUB_IY;
|
| 2848 |
|
|
12'b010100100010,
|
| 2849 |
|
|
12'b010111100011: alub_sel = `ALUB_IYH;
|
| 2850 |
|
|
12'b1xxx01000011: alub_sel = `ALUB_BC;
|
| 2851 |
|
|
12'b1xxx01010011: alub_sel = `ALUB_DE;
|
| 2852 |
|
|
12'b1xxx01100011: alub_sel = `ALUB_HL;
|
| 2853 |
|
|
12'b1xxx01110011: alub_sel = `ALUB_SP;
|
| 2854 |
|
|
12'b000011000101: alub_sel = `ALUB_BC;
|
| 2855 |
|
|
12'b000011010101: alub_sel = `ALUB_DE;
|
| 2856 |
|
|
12'b000011100101: alub_sel = `ALUB_HL;
|
| 2857 |
|
|
12'b000011110101: alub_sel = `ALUB_AF;
|
| 2858 |
|
|
default: alub_sel = `ALUB_PC;
|
| 2859 |
|
|
endcase
|
| 2860 |
|
|
end
|
| 2861 |
|
|
`WR2A: begin
|
| 2862 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2863 |
|
|
12'b1xxx10100010,
|
| 2864 |
|
|
12'b1xxx10101010,
|
| 2865 |
|
|
12'b1xxx10110010,
|
| 2866 |
|
|
12'b1xxx10111010: alub_sel = `ALUB_BC;
|
| 2867 |
|
|
12'b000011001101,
|
| 2868 |
|
|
12'b000011xxx100: alub_sel = `ALUB_DIN;
|
| 2869 |
|
|
default: alub_sel = `ALUB_HL;
|
| 2870 |
|
|
endcase
|
| 2871 |
|
|
end
|
| 2872 |
|
|
`WR2B: begin
|
| 2873 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2874 |
|
|
12'b1xxx10100010,
|
| 2875 |
|
|
12'b1xxx10100011,
|
| 2876 |
|
|
12'b1xxx10101010,
|
| 2877 |
|
|
12'b1xxx10101011,
|
| 2878 |
|
|
12'b1xxx10110010,
|
| 2879 |
|
|
12'b1xxx10110011,
|
| 2880 |
|
|
12'b1xxx10111010,
|
| 2881 |
|
|
12'b1xxx10111011: alub_sel = `ALUB_BB;
|
| 2882 |
|
|
12'b1xxx10100000,
|
| 2883 |
|
|
12'b1xxx10101000,
|
| 2884 |
|
|
12'b1xxx10110000,
|
| 2885 |
|
|
12'b1xxx10111000: alub_sel = `ALUB_BC;
|
| 2886 |
|
|
default: alub_sel = `ALUB_PC;
|
| 2887 |
|
|
endcase
|
| 2888 |
|
|
end
|
| 2889 |
|
|
`BLK1: alub_sel = `ALUB_HL;
|
| 2890 |
|
|
`BLK2: alub_sel = (inst_reg[4]) ? `ALUB_BC : `ALUB_PC;
|
| 2891 |
|
|
`PCA,
|
| 2892 |
|
|
`PCO: alub_sel = `ALUB_PC;
|
| 2893 |
|
|
`IF1A: begin
|
| 2894 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2895 |
|
|
12'b1xxx10100011,
|
| 2896 |
|
|
12'b1xxx10101011,
|
| 2897 |
|
|
12'b1xxx10110011,
|
| 2898 |
|
|
12'b1xxx10111011: alub_sel = `ALUB_BB;
|
| 2899 |
|
|
12'b1xxx10100000,
|
| 2900 |
|
|
12'b1xxx10101000,
|
| 2901 |
|
|
12'b1xxx10110000,
|
| 2902 |
|
|
12'b1xxx10111000: alub_sel = `ALUB_DE;
|
| 2903 |
|
|
12'b1xxx10101010,
|
| 2904 |
|
|
12'b1xxx10111010,
|
| 2905 |
|
|
12'b1xxx10100010,
|
| 2906 |
|
|
12'b1xxx10110010: alub_sel = `ALUB_HL;
|
| 2907 |
|
|
default: alub_sel = `ALUB_DIN;
|
| 2908 |
|
|
endcase
|
| 2909 |
|
|
end
|
| 2910 |
|
|
`INTA: alub_sel = `ALUB_SP;
|
| 2911 |
|
|
`INTB: alub_sel = `ALUB_PCH;
|
| 2912 |
|
|
default: alub_sel = `ALUB_PC;
|
| 2913 |
|
|
endcase
|
| 2914 |
|
|
end
|
| 2915 |
|
|
|
| 2916 |
|
|
/*****************************************************************************************/
|
| 2917 |
|
|
/* */
|
| 2918 |
|
|
/* register write control */
|
| 2919 |
|
|
/* */
|
| 2920 |
|
|
/*****************************************************************************************/
|
| 2921 |
|
|
always @ (inst_reg or page_reg or state_reg or carry_bit or par_bit or sign_bit or
|
| 2922 |
|
|
vector_int or zero_bit) begin
|
| 2923 |
|
|
casex (state_reg) //synopsys parallel_case
|
| 2924 |
|
|
`OF1B: begin
|
| 2925 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2926 |
|
|
12'b000000010000: wr_addr = `WREG_BB;
|
| 2927 |
|
|
default: wr_addr = `WREG_NUL;
|
| 2928 |
|
|
endcase
|
| 2929 |
|
|
end
|
| 2930 |
|
|
`OF2B: begin
|
| 2931 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2932 |
|
|
12'b000011001101: wr_addr = `WREG_SP;
|
| 2933 |
|
|
12'b000011000100: wr_addr = ( !zero_bit) ? `WREG_SP : `WREG_NUL;
|
| 2934 |
|
|
12'b000011001100: wr_addr = ( zero_bit) ? `WREG_SP : `WREG_NUL;
|
| 2935 |
|
|
12'b000011010100: wr_addr = (!carry_bit) ? `WREG_SP : `WREG_NUL;
|
| 2936 |
|
|
12'b000011011100: wr_addr = ( carry_bit) ? `WREG_SP : `WREG_NUL;
|
| 2937 |
|
|
12'b000011100100: wr_addr = ( !par_bit) ? `WREG_SP : `WREG_NUL;
|
| 2938 |
|
|
12'b000011101100: wr_addr = ( par_bit) ? `WREG_SP : `WREG_NUL;
|
| 2939 |
|
|
12'b000011110100: wr_addr = ( !sign_bit) ? `WREG_SP : `WREG_NUL;
|
| 2940 |
|
|
12'b000011111100: wr_addr = ( sign_bit) ? `WREG_SP : `WREG_NUL;
|
| 2941 |
|
|
default: wr_addr = `WREG_NUL;
|
| 2942 |
|
|
endcase
|
| 2943 |
|
|
end
|
| 2944 |
|
|
`IF3B: wr_addr = `WREG_TMP;
|
| 2945 |
|
|
`ADR2: begin
|
| 2946 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2947 |
|
|
12'b000011xxx111,
|
| 2948 |
|
|
12'b000011xx0101,
|
| 2949 |
|
|
12'b010011100101,
|
| 2950 |
|
|
12'b010111100101: wr_addr = `WREG_SP;
|
| 2951 |
|
|
12'b000000100010,
|
| 2952 |
|
|
12'b000000101010,
|
| 2953 |
|
|
12'b010000100010,
|
| 2954 |
|
|
12'b010000101010,
|
| 2955 |
|
|
12'b010000110100,
|
| 2956 |
|
|
12'b010000110101,
|
| 2957 |
|
|
12'b010100100010,
|
| 2958 |
|
|
12'b010100101010,
|
| 2959 |
|
|
12'b010100110100,
|
| 2960 |
|
|
12'b010100110101,
|
| 2961 |
|
|
12'b1xxx01xx0011,
|
| 2962 |
|
|
12'b1xxx01xx1011: wr_addr = `WREG_TMP;
|
| 2963 |
|
|
default: wr_addr = `WREG_NUL;
|
| 2964 |
|
|
endcase
|
| 2965 |
|
|
end
|
| 2966 |
|
|
`RD1A: begin
|
| 2967 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2968 |
|
|
12'b1xxx10100010,
|
| 2969 |
|
|
12'b1xxx10100011,
|
| 2970 |
|
|
12'b1xxx10101010,
|
| 2971 |
|
|
12'b1xxx10101011,
|
| 2972 |
|
|
12'b1xxx10110010,
|
| 2973 |
|
|
12'b1xxx10110011,
|
| 2974 |
|
|
12'b1xxx10111010,
|
| 2975 |
|
|
12'b1xxx10111011: wr_addr = `WREG_BB;
|
| 2976 |
|
|
12'b1xxx10100000,
|
| 2977 |
|
|
12'b1xxx10100001,
|
| 2978 |
|
|
12'b1xxx10101000,
|
| 2979 |
|
|
12'b1xxx10101001,
|
| 2980 |
|
|
12'b1xxx10110000,
|
| 2981 |
|
|
12'b1xxx10110001,
|
| 2982 |
|
|
12'b1xxx10111000,
|
| 2983 |
|
|
12'b1xxx10111001: wr_addr = `WREG_BC;
|
| 2984 |
|
|
default: wr_addr = `WREG_NUL;
|
| 2985 |
|
|
endcase
|
| 2986 |
|
|
end
|
| 2987 |
|
|
`RD1B: begin
|
| 2988 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 2989 |
|
|
12'b000011001001,
|
| 2990 |
|
|
12'b000011xxx000,
|
| 2991 |
|
|
12'b000011xx0001,
|
| 2992 |
|
|
12'b010011100001,
|
| 2993 |
|
|
12'b010111100001,
|
| 2994 |
|
|
12'b1xxx01000101,
|
| 2995 |
|
|
12'b1xxx01001101: wr_addr = `WREG_SP;
|
| 2996 |
|
|
default: wr_addr = `WREG_NUL;
|
| 2997 |
|
|
endcase
|
| 2998 |
|
|
end
|
| 2999 |
|
|
`RD2A: begin
|
| 3000 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 3001 |
|
|
12'b1xxx10100010,
|
| 3002 |
|
|
12'b1xxx10100011,
|
| 3003 |
|
|
12'b1xxx10101010,
|
| 3004 |
|
|
12'b1xxx10101011,
|
| 3005 |
|
|
12'b1xxx10110010,
|
| 3006 |
|
|
12'b1xxx10110011,
|
| 3007 |
|
|
12'b1xxx10111010,
|
| 3008 |
|
|
12'b1xxx10111011: wr_addr = `WREG_BB;
|
| 3009 |
|
|
12'b1xxx10100000,
|
| 3010 |
|
|
12'b1xxx10100001,
|
| 3011 |
|
|
12'b1xxx10101000,
|
| 3012 |
|
|
12'b1xxx10101001,
|
| 3013 |
|
|
12'b1xxx10110000,
|
| 3014 |
|
|
12'b1xxx10110001,
|
| 3015 |
|
|
12'b1xxx10111000,
|
| 3016 |
|
|
12'b1xxx10111001: wr_addr = `WREG_BC;
|
| 3017 |
|
|
default: wr_addr = `WREG_NUL;
|
| 3018 |
|
|
endcase
|
| 3019 |
|
|
end
|
| 3020 |
|
|
`RD2B: begin
|
| 3021 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 3022 |
|
|
12'b1xxx10100000,
|
| 3023 |
|
|
12'b1xxx10101000,
|
| 3024 |
|
|
12'b1xxx10110000,
|
| 3025 |
|
|
12'b1xxx10111000: wr_addr = `WREG_DE;
|
| 3026 |
|
|
12'b1xxx10100010,
|
| 3027 |
|
|
12'b1xxx10101010,
|
| 3028 |
|
|
12'b1xxx10110010,
|
| 3029 |
|
|
12'b1xxx10111010: wr_addr = `WREG_HL;
|
| 3030 |
|
|
12'b000011001001,
|
| 3031 |
|
|
12'b000011xxx000,
|
| 3032 |
|
|
12'b000011xx0001,
|
| 3033 |
|
|
12'b0001xxxxxxxx,
|
| 3034 |
|
|
12'b010011100001,
|
| 3035 |
|
|
12'b010111100001,
|
| 3036 |
|
|
12'b1xxx01000101,
|
| 3037 |
|
|
12'b1xxx01001101: wr_addr = `WREG_SP;
|
| 3038 |
|
|
default: wr_addr = `WREG_NUL;
|
| 3039 |
|
|
endcase
|
| 3040 |
|
|
end
|
| 3041 |
|
|
`WR1B: begin
|
| 3042 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 3043 |
|
|
12'b1xxx10100000,
|
| 3044 |
|
|
12'b1xxx10100011,
|
| 3045 |
|
|
12'b1xxx10101000,
|
| 3046 |
|
|
12'b1xxx10101011,
|
| 3047 |
|
|
12'b1xxx10110000,
|
| 3048 |
|
|
12'b1xxx10110011,
|
| 3049 |
|
|
12'b1xxx10111000,
|
| 3050 |
|
|
12'b1xxx10111011: wr_addr = `WREG_HL;
|
| 3051 |
|
|
12'b000011001101,
|
| 3052 |
|
|
12'b000011xxx100,
|
| 3053 |
|
|
12'b000011xxx111,
|
| 3054 |
|
|
12'b000011xx0101,
|
| 3055 |
|
|
12'b0001xxxxxxxx,
|
| 3056 |
|
|
12'b010011100101,
|
| 3057 |
|
|
12'b010111100101: wr_addr = `WREG_SP;
|
| 3058 |
|
|
default: wr_addr = `WREG_NUL;
|
| 3059 |
|
|
endcase
|
| 3060 |
|
|
end
|
| 3061 |
|
|
`WR2B: begin
|
| 3062 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 3063 |
|
|
12'b1xxx10100000,
|
| 3064 |
|
|
12'b1xxx10100011,
|
| 3065 |
|
|
12'b1xxx10101000,
|
| 3066 |
|
|
12'b1xxx10101011,
|
| 3067 |
|
|
12'b1xxx10110000,
|
| 3068 |
|
|
12'b1xxx10110011,
|
| 3069 |
|
|
12'b1xxx10111000,
|
| 3070 |
|
|
12'b1xxx10111011: wr_addr = `WREG_HL;
|
| 3071 |
|
|
default: wr_addr = `WREG_NUL;
|
| 3072 |
|
|
endcase
|
| 3073 |
|
|
end
|
| 3074 |
|
|
`BLK2: begin
|
| 3075 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 3076 |
|
|
12'b1xxx10100001,
|
| 3077 |
|
|
12'b1xxx10101001,
|
| 3078 |
|
|
12'b1xxx10110001,
|
| 3079 |
|
|
12'b1xxx10111001: wr_addr = `WREG_HL;
|
| 3080 |
|
|
default: wr_addr = `WREG_NUL;
|
| 3081 |
|
|
endcase
|
| 3082 |
|
|
end
|
| 3083 |
|
|
`IF1B: begin
|
| 3084 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 3085 |
4 |
bsa |
12'b000000000111,
|
| 3086 |
|
|
12'b000000001010,
|
| 3087 |
|
|
12'b000000001111,
|
| 3088 |
|
|
12'b000000010111,
|
| 3089 |
|
|
12'b000000011010,
|
| 3090 |
|
|
12'b000000011111,
|
| 3091 |
|
|
12'b000000100111,
|
| 3092 |
|
|
12'b000000101111,
|
| 3093 |
|
|
12'b000000111010,
|
| 3094 |
|
|
12'b00000011110x,
|
| 3095 |
|
|
12'b000000111110,
|
| 3096 |
|
|
12'b000001111xxx,
|
| 3097 |
|
|
12'b000010000xxx,
|
| 3098 |
|
|
12'b000010001xxx,
|
| 3099 |
|
|
12'b000010010xxx,
|
| 3100 |
|
|
12'b000010011xxx,
|
| 3101 |
|
|
12'b000010100xxx,
|
| 3102 |
|
|
12'b000010101xxx,
|
| 3103 |
|
|
12'b000010110xxx,
|
| 3104 |
|
|
12'b000011000110,
|
| 3105 |
|
|
12'b000011001110,
|
| 3106 |
|
|
12'b000011010110,
|
| 3107 |
|
|
12'b000011011011,
|
| 3108 |
|
|
12'b000011011110,
|
| 3109 |
|
|
12'b000011100110,
|
| 3110 |
|
|
12'b000011101110,
|
| 3111 |
|
|
12'b000011110110,
|
| 3112 |
|
|
12'b001000xxx111,
|
| 3113 |
|
|
12'b00101xxxx111,
|
| 3114 |
|
|
//12'b011x00xxx111,
|
| 3115 |
|
|
//12'b011x1xxxx111,
|
| 3116 |
|
|
12'b010010000100,
|
| 3117 |
|
|
12'b010010000101,
|
| 3118 |
|
|
12'b010010000110,
|
| 3119 |
|
|
12'b010010001100,
|
| 3120 |
|
|
12'b010010001101,
|
| 3121 |
|
|
12'b010010001110,
|
| 3122 |
|
|
12'b010010010100,
|
| 3123 |
|
|
12'b010010010101,
|
| 3124 |
|
|
12'b010010010110,
|
| 3125 |
|
|
12'b010010011100,
|
| 3126 |
|
|
12'b010010011101,
|
| 3127 |
|
|
12'b010010011110,
|
| 3128 |
|
|
12'b010010100100,
|
| 3129 |
|
|
12'b010010100101,
|
| 3130 |
|
|
12'b010010100110,
|
| 3131 |
|
|
12'b010010101100,
|
| 3132 |
|
|
12'b010010101101,
|
| 3133 |
|
|
12'b010010101110,
|
| 3134 |
|
|
12'b010010110100,
|
| 3135 |
|
|
12'b010010110101,
|
| 3136 |
|
|
12'b010010110110,
|
| 3137 |
|
|
12'b010110000100,
|
| 3138 |
|
|
12'b010110000101,
|
| 3139 |
|
|
12'b010110000110,
|
| 3140 |
|
|
12'b010110001100,
|
| 3141 |
|
|
12'b010110001101,
|
| 3142 |
|
|
12'b010110001110,
|
| 3143 |
|
|
12'b010110010100,
|
| 3144 |
|
|
12'b010110010101,
|
| 3145 |
|
|
12'b010110010110,
|
| 3146 |
|
|
12'b010110011100,
|
| 3147 |
|
|
12'b010110011101,
|
| 3148 |
|
|
12'b010110011110,
|
| 3149 |
|
|
12'b010110100100,
|
| 3150 |
|
|
12'b010110100101,
|
| 3151 |
|
|
12'b010110100110,
|
| 3152 |
|
|
12'b010110101100,
|
| 3153 |
|
|
12'b010110101101,
|
| 3154 |
|
|
12'b010110101110,
|
| 3155 |
|
|
12'b010110110100,
|
| 3156 |
|
|
12'b010110110101,
|
| 3157 |
|
|
12'b010110110110,
|
| 3158 |
|
|
12'b010x0111110x,
|
| 3159 |
|
|
12'b010x01111110,
|
| 3160 |
|
|
12'b1xxx01000100,
|
| 3161 |
|
|
12'b1xxx01010111,
|
| 3162 |
|
|
12'b1xxx01011111,
|
| 3163 |
|
|
12'b1xxx01100111,
|
| 3164 |
|
|
12'b1xxx01101111,
|
| 3165 |
|
|
12'b1xxx0x111000: wr_addr = `WREG_AA;
|
| 3166 |
|
|
12'b000011110001: wr_addr = `WREG_AF;
|
| 3167 |
|
|
12'b00000000010x,
|
| 3168 |
|
|
12'b000000000110,
|
| 3169 |
|
|
12'b000001000xxx,
|
| 3170 |
|
|
12'b001000xxx000,
|
| 3171 |
|
|
12'b00101xxxx000,
|
| 3172 |
|
|
//12'b011x00xxx000,
|
| 3173 |
|
|
// 12'b011x1xxxx000,
|
| 3174 |
|
|
12'b010x0100010x,
|
| 3175 |
|
|
12'b010x01000110,
|
| 3176 |
|
|
12'b1xxx0x000000,
|
| 3177 |
2 |
bsa |
12'b1xxx10100011,
|
| 3178 |
|
|
12'b1xxx10101011,
|
| 3179 |
|
|
12'b1xxx10110011,
|
| 3180 |
|
|
12'b1xxx10111011: wr_addr = `WREG_BB;
|
| 3181 |
|
|
12'b000000000001,
|
| 3182 |
4 |
bsa |
12'b00000000x011,
|
| 3183 |
|
|
12'b000011000001,
|
| 3184 |
2 |
bsa |
12'b1xxx01001011: wr_addr = `WREG_BC;
|
| 3185 |
4 |
bsa |
12'b00000000110x,
|
| 3186 |
|
|
12'b000000001110,
|
| 3187 |
|
|
12'b000001001xxx,
|
| 3188 |
|
|
12'b001000xxx001,
|
| 3189 |
|
|
12'b00101xxxx001,
|
| 3190 |
|
|
//12'b011x00xxx001,
|
| 3191 |
|
|
//12'b011x1xxxx001,
|
| 3192 |
|
|
12'b010x0100110x,
|
| 3193 |
|
|
12'b010x01001110,
|
| 3194 |
|
|
12'b1xxx0x001000: wr_addr = `WREG_CC;
|
| 3195 |
|
|
12'b00000001010x,
|
| 3196 |
|
|
12'b000000010110,
|
| 3197 |
|
|
12'b000001010xxx,
|
| 3198 |
|
|
12'b001000xxx010,
|
| 3199 |
|
|
12'b00101xxxx010,
|
| 3200 |
|
|
//12'b011x00xxx010,
|
| 3201 |
|
|
//12'b011x1xxxx010,
|
| 3202 |
|
|
12'b010x0101010x,
|
| 3203 |
|
|
12'b010x01010110,
|
| 3204 |
|
|
12'b1xxx0x010000: wr_addr = `WREG_DD;
|
| 3205 |
|
|
12'b000011010001,
|
| 3206 |
|
|
12'b00000001x011,
|
| 3207 |
2 |
bsa |
12'b000000010001,
|
| 3208 |
4 |
bsa |
12'b1xxx01011011,
|
| 3209 |
|
|
12'b1xxx10100000,
|
| 3210 |
|
|
12'b1xxx10101000,
|
| 3211 |
|
|
12'b1xxx10110000,
|
| 3212 |
|
|
12'b1xxx10111000: wr_addr = `WREG_DE;
|
| 3213 |
|
|
12'b000011101011: wr_addr = `WREG_DEHL;
|
| 3214 |
|
|
12'b00000001110x,
|
| 3215 |
|
|
12'b000000011110,
|
| 3216 |
|
|
12'b000001011xxx,
|
| 3217 |
|
|
12'b001000xxx011,
|
| 3218 |
|
|
12'b00101xxxx011,
|
| 3219 |
|
|
//12'b011x00xxx011,
|
| 3220 |
|
|
//12'b011x1xxxx011,
|
| 3221 |
|
|
12'b010x0101110x,
|
| 3222 |
|
|
12'b010x01011110,
|
| 3223 |
|
|
12'b1xxx0x011000: wr_addr = `WREG_EE;
|
| 3224 |
|
|
12'b00000010010x,
|
| 3225 |
|
|
12'b000000100110,
|
| 3226 |
|
|
12'b000001100xxx,
|
| 3227 |
|
|
12'b001000xxx100,
|
| 3228 |
|
|
12'b00101xxxx100,
|
| 3229 |
|
|
//12'b011x00xxx100,
|
| 3230 |
|
|
//12'b011x1xxxx100,
|
| 3231 |
|
|
12'b010x01100110,
|
| 3232 |
|
|
12'b1xxx0x100000: wr_addr = `WREG_HH;
|
| 3233 |
2 |
bsa |
12'b000000100001,
|
| 3234 |
4 |
bsa |
12'b000000101010,
|
| 3235 |
|
|
12'b00000010x011,
|
| 3236 |
|
|
12'b000000xx1001,
|
| 3237 |
|
|
12'b000011100001,
|
| 3238 |
|
|
12'b000011100011,
|
| 3239 |
|
|
12'b1xxx01101011,
|
| 3240 |
|
|
12'b1xxx01xx0010,
|
| 3241 |
|
|
12'b1xxx01xx1010,
|
| 3242 |
|
|
12'b1xxx10100010,
|
| 3243 |
|
|
12'b1xxx10101010,
|
| 3244 |
|
|
12'b1xxx10110010,
|
| 3245 |
|
|
12'b1xxx10111010: wr_addr = `WREG_HL;
|
| 3246 |
|
|
12'b1xxx01000111: wr_addr = `WREG_II;
|
| 3247 |
|
|
12'b010000100001,
|
| 3248 |
|
|
12'b010000100011,
|
| 3249 |
|
|
12'b010000101010,
|
| 3250 |
|
|
12'b010000101011,
|
| 3251 |
|
|
12'b010000xx1001,
|
| 3252 |
|
|
12'b010011100001,
|
| 3253 |
|
|
12'b010011100011: wr_addr = `WREG_IX;
|
| 3254 |
|
|
12'b010000100100,
|
| 3255 |
|
|
12'b010000100101,
|
| 3256 |
|
|
12'b010000100110,
|
| 3257 |
|
|
12'b0100011000xx,
|
| 3258 |
|
|
12'b01000110010x,
|
| 3259 |
|
|
12'b010001100111: wr_addr = `WREG_IXH;
|
| 3260 |
|
|
12'b010000101100,
|
| 3261 |
|
|
12'b010000101101,
|
| 3262 |
|
|
12'b010000101110,
|
| 3263 |
|
|
12'b0100011010xx,
|
| 3264 |
|
|
12'b01000110110x,
|
| 3265 |
|
|
12'b010001101111: wr_addr = `WREG_IXL;
|
| 3266 |
|
|
12'b010100100001,
|
| 3267 |
|
|
12'b010100100011,
|
| 3268 |
|
|
12'b010100101010,
|
| 3269 |
|
|
12'b010100101011,
|
| 3270 |
|
|
12'b010100xx1001,
|
| 3271 |
|
|
12'b010111100001,
|
| 3272 |
|
|
12'b010111100011: wr_addr = `WREG_IY;
|
| 3273 |
|
|
12'b010100100100,
|
| 3274 |
|
|
12'b010100100101,
|
| 3275 |
|
|
12'b010100100110,
|
| 3276 |
|
|
12'b0101011000xx,
|
| 3277 |
|
|
12'b01010110010x,
|
| 3278 |
|
|
12'b010101100111: wr_addr = `WREG_IYH;
|
| 3279 |
|
|
12'b010100101100,
|
| 3280 |
|
|
12'b010100101101,
|
| 3281 |
|
|
12'b010100101110,
|
| 3282 |
|
|
12'b0101011010xx,
|
| 3283 |
|
|
12'b01010110110x,
|
| 3284 |
|
|
12'b010101101111: wr_addr = `WREG_IYL;
|
| 3285 |
|
|
12'b00000010110x,
|
| 3286 |
|
|
12'b000000101110,
|
| 3287 |
|
|
12'b000001101xxx,
|
| 3288 |
|
|
12'b001000xxx101,
|
| 3289 |
|
|
12'b00101xxxx101,
|
| 3290 |
|
|
//12'b011x00xxx101,
|
| 3291 |
|
|
//12'b011x1xxxx101,
|
| 3292 |
|
|
12'b010x01101110,
|
| 3293 |
|
|
12'b1xxx0x101000: wr_addr = `WREG_LL;
|
| 3294 |
|
|
12'b1xxx01001111: wr_addr = `WREG_RR;
|
| 3295 |
2 |
bsa |
12'b000000110001,
|
| 3296 |
4 |
bsa |
12'b00000011x011,
|
| 3297 |
|
|
12'b000011111001,
|
| 3298 |
|
|
12'b010x11111001,
|
| 3299 |
2 |
bsa |
12'b1xxx01111011: wr_addr = `WREG_SP;
|
| 3300 |
|
|
default: wr_addr = `WREG_NUL;
|
| 3301 |
|
|
endcase
|
| 3302 |
|
|
end
|
| 3303 |
|
|
`INTB: wr_addr = (vector_int) ? `WREG_TMP : `WREG_SP;
|
| 3304 |
|
|
default: wr_addr = `WREG_NUL;
|
| 3305 |
|
|
endcase
|
| 3306 |
|
|
end
|
| 3307 |
|
|
|
| 3308 |
|
|
/*****************************************************************************************/
|
| 3309 |
|
|
/* */
|
| 3310 |
|
|
/* s flag control */
|
| 3311 |
|
|
/* */
|
| 3312 |
|
|
/*****************************************************************************************/
|
| 3313 |
|
|
always @ (inst_reg or page_reg or state_reg) begin
|
| 3314 |
|
|
casex (state_reg) //synopsys parallel_case
|
| 3315 |
|
|
`WR2A: begin
|
| 3316 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 3317 |
4 |
bsa |
12'b000000110100,
|
| 3318 |
|
|
12'b000000110101,
|
| 3319 |
|
|
12'b001000xxxxxx,
|
| 3320 |
|
|
12'b010000110100,
|
| 3321 |
|
|
12'b010000110101,
|
| 3322 |
|
|
12'b010100110100,
|
| 3323 |
|
|
12'b010100110101,
|
| 3324 |
|
|
12'b011x00xxxxxx: sflg_en = 1'b1;
|
| 3325 |
2 |
bsa |
default: sflg_en = 1'b0;
|
| 3326 |
|
|
endcase
|
| 3327 |
|
|
end
|
| 3328 |
|
|
`BLK1: begin
|
| 3329 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 3330 |
|
|
12'b1xxx10100001,
|
| 3331 |
|
|
12'b1xxx10101001,
|
| 3332 |
|
|
12'b1xxx10110001,
|
| 3333 |
|
|
12'b1xxx10111001: sflg_en = 1'b1;
|
| 3334 |
|
|
default: sflg_en = 1'b0;
|
| 3335 |
|
|
endcase
|
| 3336 |
|
|
end
|
| 3337 |
|
|
`IF1B: begin
|
| 3338 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 3339 |
|
|
12'b000000100111,
|
| 3340 |
4 |
bsa |
12'b0000000xx100,12'b00000010x100,12'b000000111100,
|
| 3341 |
|
|
12'b0000000xx101,12'b00000010x101,12'b000000111101,
|
| 3342 |
|
|
12'b000010000110,
|
| 3343 |
|
|
12'b000010000xxx,
|
| 3344 |
|
|
12'b000010001110,
|
| 3345 |
|
|
12'b000010001xxx,
|
| 3346 |
|
|
12'b000010010110,
|
| 3347 |
|
|
12'b000010010xxx,
|
| 3348 |
|
|
12'b000010011110,
|
| 3349 |
|
|
12'b000010011xxx,
|
| 3350 |
|
|
12'b000010100110,
|
| 3351 |
|
|
12'b000010100xxx,
|
| 3352 |
|
|
12'b000010101110,
|
| 3353 |
|
|
12'b000010101xxx,
|
| 3354 |
|
|
12'b000010110110,
|
| 3355 |
|
|
12'b000010110xxx,
|
| 3356 |
|
|
12'b000010111110,
|
| 3357 |
|
|
12'b000010111xxx,
|
| 3358 |
|
|
12'b000011000110,
|
| 3359 |
|
|
12'b000011001110,
|
| 3360 |
|
|
12'b000011010110,
|
| 3361 |
|
|
12'b000011011110,
|
| 3362 |
|
|
12'b000011100110,
|
| 3363 |
|
|
12'b000011101110,
|
| 3364 |
|
|
12'b000011110110,
|
| 3365 |
|
|
12'b000011111110,
|
| 3366 |
|
|
12'b001000xxx0xx,
|
| 3367 |
|
|
12'b001000xxx10x,
|
| 3368 |
|
|
12'b001000xxx111,
|
| 3369 |
|
|
12'b010000100100,
|
| 3370 |
|
|
12'b010000100101,
|
| 3371 |
|
|
12'b010000101100,
|
| 3372 |
|
|
12'b010000101101,
|
| 3373 |
|
|
12'b010010000100,
|
| 3374 |
|
|
12'b010010000101,
|
| 3375 |
|
|
12'b010010000110,
|
| 3376 |
|
|
12'b010010001100,
|
| 3377 |
|
|
12'b010010001101,
|
| 3378 |
|
|
12'b010010001110,
|
| 3379 |
|
|
12'b010010010100,
|
| 3380 |
|
|
12'b010010010101,
|
| 3381 |
|
|
12'b010010010110,
|
| 3382 |
|
|
12'b010010011100,
|
| 3383 |
|
|
12'b010010011101,
|
| 3384 |
|
|
12'b010010011110,
|
| 3385 |
|
|
12'b010010100100,
|
| 3386 |
|
|
12'b010010100101,
|
| 3387 |
|
|
12'b010010100110,
|
| 3388 |
|
|
12'b010010101100,
|
| 3389 |
|
|
12'b010010101101,
|
| 3390 |
|
|
12'b010010101110,
|
| 3391 |
|
|
12'b010010110100,
|
| 3392 |
|
|
12'b010010110101,
|
| 3393 |
|
|
12'b010010110110,
|
| 3394 |
|
|
12'b010010111100,
|
| 3395 |
|
|
12'b010010111101,
|
| 3396 |
|
|
12'b010010111110,
|
| 3397 |
|
|
12'b010100100100,
|
| 3398 |
|
|
12'b010100100101,
|
| 3399 |
|
|
12'b010100101100,
|
| 3400 |
|
|
12'b010100101101,
|
| 3401 |
|
|
12'b010110000100,
|
| 3402 |
|
|
12'b010110000101,
|
| 3403 |
|
|
12'b010110000110,
|
| 3404 |
|
|
12'b010110001100,
|
| 3405 |
|
|
12'b010110001101,
|
| 3406 |
|
|
12'b010110001110,
|
| 3407 |
|
|
12'b010110010100,
|
| 3408 |
|
|
12'b010110010101,
|
| 3409 |
|
|
12'b010110010110,
|
| 3410 |
|
|
12'b010110011100,
|
| 3411 |
|
|
12'b010110011101,
|
| 3412 |
|
|
12'b010110011110,
|
| 3413 |
|
|
12'b010110100100,
|
| 3414 |
|
|
12'b010110100101,
|
| 3415 |
|
|
12'b010110100110,
|
| 3416 |
|
|
12'b010110101100,
|
| 3417 |
|
|
12'b010110101101,
|
| 3418 |
|
|
12'b010110101110,
|
| 3419 |
|
|
12'b010110110100,
|
| 3420 |
|
|
12'b010110110101,
|
| 3421 |
|
|
12'b010110110110,
|
| 3422 |
|
|
12'b010110111100,
|
| 3423 |
|
|
12'b010110111101,
|
| 3424 |
|
|
12'b010110111110,
|
| 3425 |
|
|
12'b1xxx01000100,
|
| 3426 |
|
|
12'b1xxx01010111,
|
| 3427 |
|
|
12'b1xxx01011111,
|
| 3428 |
|
|
12'b1xxx01100111,
|
| 3429 |
|
|
12'b1xxx01101111,
|
| 3430 |
|
|
12'b1xxx01xxx000,
|
| 3431 |
|
|
12'b1xxx01xx0010,
|
| 3432 |
2 |
bsa |
12'b1xxx01xx1010: sflg_en = 1'b1;
|
| 3433 |
|
|
default: sflg_en = 1'b0;
|
| 3434 |
|
|
endcase
|
| 3435 |
|
|
end
|
| 3436 |
|
|
default: sflg_en = 1'b0;
|
| 3437 |
|
|
endcase
|
| 3438 |
|
|
end
|
| 3439 |
|
|
|
| 3440 |
|
|
/*****************************************************************************************/
|
| 3441 |
|
|
/* */
|
| 3442 |
|
|
/* z flag control */
|
| 3443 |
|
|
/* */
|
| 3444 |
|
|
/*****************************************************************************************/
|
| 3445 |
|
|
always @ (inst_reg or page_reg or state_reg) begin
|
| 3446 |
|
|
casex (state_reg) //synopsys parallel_case
|
| 3447 |
|
|
`RD1A,
|
| 3448 |
|
|
`RD2A: begin
|
| 3449 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 3450 |
|
|
12'b1xxx10100010,
|
| 3451 |
|
|
12'b1xxx10100011,
|
| 3452 |
|
|
12'b1xxx10101010,
|
| 3453 |
|
|
12'b1xxx10101011,
|
| 3454 |
|
|
12'b1xxx10110010,
|
| 3455 |
|
|
12'b1xxx10110011,
|
| 3456 |
|
|
12'b1xxx10111010,
|
| 3457 |
|
|
12'b1xxx10111011: zflg_en = 1'b1;
|
| 3458 |
|
|
default: zflg_en = 1'b0;
|
| 3459 |
|
|
endcase
|
| 3460 |
|
|
end
|
| 3461 |
|
|
`WR2A: begin
|
| 3462 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 3463 |
4 |
bsa |
12'b000000110100,
|
| 3464 |
|
|
12'b000000110101,
|
| 3465 |
|
|
12'b001000xxxxxx,
|
| 3466 |
|
|
12'b010000110100,
|
| 3467 |
|
|
12'b010000110101,
|
| 3468 |
|
|
12'b010100110100,
|
| 3469 |
|
|
12'b010100110101,
|
| 3470 |
|
|
12'b011x00xxxxxx: zflg_en = 1'b1;
|
| 3471 |
2 |
bsa |
default: zflg_en = 1'b0;
|
| 3472 |
|
|
endcase
|
| 3473 |
|
|
end
|
| 3474 |
|
|
`BLK1: begin
|
| 3475 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 3476 |
|
|
12'b1xxx10100001,
|
| 3477 |
|
|
12'b1xxx10101001,
|
| 3478 |
|
|
12'b1xxx10110001,
|
| 3479 |
|
|
12'b1xxx10111001: zflg_en = 1'b1;
|
| 3480 |
|
|
default: zflg_en = 1'b0;
|
| 3481 |
|
|
endcase
|
| 3482 |
|
|
end
|
| 3483 |
|
|
`IF1B: begin
|
| 3484 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 3485 |
|
|
12'b000000100111,
|
| 3486 |
4 |
bsa |
12'b0000000xx100,12'b00000010x100,12'b000000111100,
|
| 3487 |
|
|
12'b0000000xx101,12'b00000010x101,12'b000000111101,
|
| 3488 |
2 |
bsa |
12'b000010000110,
|
| 3489 |
|
|
12'b000010000xxx,
|
| 3490 |
|
|
12'b000010001110,
|
| 3491 |
|
|
12'b000010001xxx,
|
| 3492 |
|
|
12'b000010010110,
|
| 3493 |
|
|
12'b000010010xxx,
|
| 3494 |
|
|
12'b000010011110,
|
| 3495 |
|
|
12'b000010011xxx,
|
| 3496 |
|
|
12'b000010100110,
|
| 3497 |
|
|
12'b000010100xxx,
|
| 3498 |
|
|
12'b000010101110,
|
| 3499 |
|
|
12'b000010101xxx,
|
| 3500 |
|
|
12'b000010110110,
|
| 3501 |
|
|
12'b000010110xxx,
|
| 3502 |
|
|
12'b000010111110,
|
| 3503 |
|
|
12'b000010111xxx,
|
| 3504 |
|
|
12'b000011000110,
|
| 3505 |
|
|
12'b000011001110,
|
| 3506 |
|
|
12'b000011010110,
|
| 3507 |
|
|
12'b000011011110,
|
| 3508 |
|
|
12'b000011100110,
|
| 3509 |
|
|
12'b000011101110,
|
| 3510 |
|
|
12'b000011110110,
|
| 3511 |
|
|
12'b000011111110,
|
| 3512 |
4 |
bsa |
12'b001000xxx0xx,12'b001000xxx10x,12'b001000xxx111,
|
| 3513 |
2 |
bsa |
12'b001001xxx110,
|
| 3514 |
|
|
12'b001001xxxxxx,
|
| 3515 |
4 |
bsa |
12'b010000100100,
|
| 3516 |
|
|
12'b010000100101,
|
| 3517 |
|
|
12'b010000101100,
|
| 3518 |
|
|
12'b010000101101,
|
| 3519 |
|
|
12'b010010000100,
|
| 3520 |
|
|
12'b010010000101,
|
| 3521 |
2 |
bsa |
12'b010010000110,
|
| 3522 |
4 |
bsa |
12'b010010001100,
|
| 3523 |
|
|
12'b010010001101,
|
| 3524 |
2 |
bsa |
12'b010010001110,
|
| 3525 |
4 |
bsa |
12'b010010010100,
|
| 3526 |
|
|
12'b010010010101,
|
| 3527 |
2 |
bsa |
12'b010010010110,
|
| 3528 |
4 |
bsa |
12'b010010011100,
|
| 3529 |
|
|
12'b010010011101,
|
| 3530 |
2 |
bsa |
12'b010010011110,
|
| 3531 |
4 |
bsa |
12'b010010100100,
|
| 3532 |
|
|
12'b010010100101,
|
| 3533 |
2 |
bsa |
12'b010010100110,
|
| 3534 |
4 |
bsa |
12'b010010101100,
|
| 3535 |
|
|
12'b010010101101,
|
| 3536 |
2 |
bsa |
12'b010010101110,
|
| 3537 |
4 |
bsa |
12'b010010110100,
|
| 3538 |
|
|
12'b010010110101,
|
| 3539 |
2 |
bsa |
12'b010010110110,
|
| 3540 |
4 |
bsa |
12'b010010111100,
|
| 3541 |
|
|
12'b010010111101,
|
| 3542 |
2 |
bsa |
12'b010010111110,
|
| 3543 |
4 |
bsa |
12'b010100100100,
|
| 3544 |
|
|
12'b010100100101,
|
| 3545 |
|
|
12'b010100101100,
|
| 3546 |
|
|
12'b010100101101,
|
| 3547 |
|
|
12'b010110000100,
|
| 3548 |
|
|
12'b010110000101,
|
| 3549 |
2 |
bsa |
12'b010110000110,
|
| 3550 |
4 |
bsa |
12'b010110001100,
|
| 3551 |
|
|
12'b010110001101,
|
| 3552 |
2 |
bsa |
12'b010110001110,
|
| 3553 |
4 |
bsa |
12'b010110010100,
|
| 3554 |
|
|
12'b010110010101,
|
| 3555 |
2 |
bsa |
12'b010110010110,
|
| 3556 |
4 |
bsa |
12'b010110011100,
|
| 3557 |
|
|
12'b010110011101,
|
| 3558 |
2 |
bsa |
12'b010110011110,
|
| 3559 |
4 |
bsa |
12'b010110100100,
|
| 3560 |
|
|
12'b010110100101,
|
| 3561 |
2 |
bsa |
12'b010110100110,
|
| 3562 |
4 |
bsa |
12'b010110101100,
|
| 3563 |
|
|
12'b010110101101,
|
| 3564 |
2 |
bsa |
12'b010110101110,
|
| 3565 |
4 |
bsa |
12'b010110110100,
|
| 3566 |
|
|
12'b010110110101,
|
| 3567 |
2 |
bsa |
12'b010110110110,
|
| 3568 |
4 |
bsa |
12'b010110111100,
|
| 3569 |
|
|
12'b010110111101,
|
| 3570 |
2 |
bsa |
12'b010110111110,
|
| 3571 |
|
|
12'b011001xxx110,
|
| 3572 |
|
|
12'b011101xxx110,
|
| 3573 |
|
|
12'b1xxx01000100,
|
| 3574 |
|
|
12'b1xxx01010111,
|
| 3575 |
|
|
12'b1xxx01011111,
|
| 3576 |
|
|
12'b1xxx01100111,
|
| 3577 |
|
|
12'b1xxx01101111,
|
| 3578 |
|
|
12'b1xxx01xxx000,
|
| 3579 |
|
|
12'b1xxx01xx0010,
|
| 3580 |
|
|
12'b1xxx01xx1010,
|
| 3581 |
|
|
12'b1xxx10100011,
|
| 3582 |
|
|
12'b1xxx10101011,
|
| 3583 |
|
|
12'b1xxx10110011,
|
| 3584 |
|
|
12'b1xxx10111011: zflg_en = 1'b1;
|
| 3585 |
|
|
default: zflg_en = 1'b0;
|
| 3586 |
|
|
endcase
|
| 3587 |
|
|
end
|
| 3588 |
|
|
default: zflg_en = 1'b0;
|
| 3589 |
|
|
endcase
|
| 3590 |
|
|
end
|
| 3591 |
|
|
|
| 3592 |
|
|
/*****************************************************************************************/
|
| 3593 |
|
|
/* */
|
| 3594 |
|
|
/* h flag control */
|
| 3595 |
|
|
/* */
|
| 3596 |
|
|
/*****************************************************************************************/
|
| 3597 |
|
|
always @ (inst_reg or page_reg or state_reg) begin
|
| 3598 |
|
|
casex (state_reg) //synopsys parallel_case
|
| 3599 |
|
|
`WR2A: begin
|
| 3600 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 3601 |
4 |
bsa |
12'b001000xxxxxx,
|
| 3602 |
|
|
12'b011x00xxxxxx,
|
| 3603 |
2 |
bsa |
12'b1xxx01100111,
|
| 3604 |
|
|
12'b1xxx01101111: hflg_ctl = `HFLG_0;
|
| 3605 |
|
|
12'b000000110100,
|
| 3606 |
|
|
12'b000000110101,
|
| 3607 |
|
|
12'b010x00110100,
|
| 3608 |
|
|
12'b010x00110101: hflg_ctl = `HFLG_H;
|
| 3609 |
|
|
default: hflg_ctl = `HFLG_NUL;
|
| 3610 |
|
|
endcase
|
| 3611 |
|
|
end
|
| 3612 |
|
|
`BLK1: begin
|
| 3613 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 3614 |
|
|
12'b1xxx10100001,
|
| 3615 |
|
|
12'b1xxx10101001,
|
| 3616 |
|
|
12'b1xxx10110001,
|
| 3617 |
|
|
12'b1xxx10111001: hflg_ctl = `HFLG_H;
|
| 3618 |
|
|
default: hflg_ctl = `HFLG_NUL;
|
| 3619 |
|
|
endcase
|
| 3620 |
|
|
end
|
| 3621 |
|
|
`IF1B: begin
|
| 3622 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 3623 |
4 |
bsa |
12'b000000000111,
|
| 3624 |
|
|
12'b000000001111,
|
| 3625 |
|
|
12'b000000010111,
|
| 3626 |
|
|
12'b000000011111,
|
| 3627 |
|
|
12'b000000110111,
|
| 3628 |
|
|
12'b000010101110,
|
| 3629 |
|
|
12'b000010101xxx,
|
| 3630 |
|
|
12'b000010110110,
|
| 3631 |
|
|
12'b000010110xxx,
|
| 3632 |
|
|
12'b000011101110,
|
| 3633 |
|
|
12'b000011110110,
|
| 3634 |
|
|
12'b001000000xxx,
|
| 3635 |
|
|
12'b001000001xxx,
|
| 3636 |
|
|
12'b001000010xxx,
|
| 3637 |
|
|
12'b001000011xxx,
|
| 3638 |
|
|
12'b001000100xxx,
|
| 3639 |
|
|
12'b001000101xxx,
|
| 3640 |
|
|
12'b001000110xxx,
|
| 3641 |
|
|
12'b001000111xxx,
|
| 3642 |
|
|
12'b010010101100,
|
| 3643 |
|
|
12'b010010101101,
|
| 3644 |
|
|
12'b010010101110,
|
| 3645 |
|
|
12'b010010110100,
|
| 3646 |
|
|
12'b010010110101,
|
| 3647 |
|
|
12'b010010110110,
|
| 3648 |
|
|
12'b010110101100,
|
| 3649 |
|
|
12'b010110101101,
|
| 3650 |
|
|
12'b010110101110,
|
| 3651 |
|
|
12'b010110110100,
|
| 3652 |
|
|
12'b010110110101,
|
| 3653 |
|
|
12'b010110110110,
|
| 3654 |
|
|
12'b1xxx01010111,
|
| 3655 |
|
|
12'b1xxx01011111,
|
| 3656 |
|
|
12'b1xxx01xxx000,
|
| 3657 |
|
|
12'b1xxx10100000,
|
| 3658 |
|
|
12'b1xxx10101000,
|
| 3659 |
|
|
12'b1xxx10110000,
|
| 3660 |
2 |
bsa |
12'b1xxx10111000: hflg_ctl = `HFLG_0;
|
| 3661 |
4 |
bsa |
12'b000000101111,
|
| 3662 |
|
|
12'b000010100110,
|
| 3663 |
|
|
12'b000010100xxx,
|
| 3664 |
|
|
12'b000011100110,
|
| 3665 |
|
|
12'b001001xxx110,
|
| 3666 |
|
|
12'b001001xxxxxx,
|
| 3667 |
|
|
12'b010010100100,
|
| 3668 |
|
|
12'b010010100101,
|
| 3669 |
|
|
12'b010010100110,
|
| 3670 |
|
|
12'b010110100100,
|
| 3671 |
|
|
12'b010110100101,
|
| 3672 |
|
|
12'b010110100110,
|
| 3673 |
|
|
12'b011001xxx110,
|
| 3674 |
2 |
bsa |
12'b011101xxx110: hflg_ctl = `HFLG_1;
|
| 3675 |
4 |
bsa |
12'b000000111111,
|
| 3676 |
|
|
12'b000000100111,
|
| 3677 |
|
|
12'b0000000xx100,12'b00000010x100,12'b000000111100,
|
| 3678 |
|
|
12'b0000000xx101,12'b00000010x101,12'b000000111101,
|
| 3679 |
|
|
12'b000000xx1001,
|
| 3680 |
|
|
12'b000010000110,
|
| 3681 |
|
|
12'b000010000xxx,
|
| 3682 |
|
|
12'b000010001110,
|
| 3683 |
|
|
12'b000010001xxx,
|
| 3684 |
|
|
12'b000010010110,
|
| 3685 |
|
|
12'b000010010xxx,
|
| 3686 |
|
|
12'b000010011110,
|
| 3687 |
|
|
12'b000010011xxx,
|
| 3688 |
|
|
12'b000010111110,
|
| 3689 |
|
|
12'b000010111xxx,
|
| 3690 |
|
|
12'b000011000110,
|
| 3691 |
|
|
12'b000011001110,
|
| 3692 |
|
|
12'b000011010110,
|
| 3693 |
|
|
12'b000011011110,
|
| 3694 |
|
|
12'b000011111110,
|
| 3695 |
|
|
12'b010000100100,
|
| 3696 |
|
|
12'b010000100101,
|
| 3697 |
|
|
12'b010000101100,
|
| 3698 |
|
|
12'b010000101101,
|
| 3699 |
|
|
12'b010000xx1001,
|
| 3700 |
|
|
12'b010010000100,
|
| 3701 |
|
|
12'b010010000101,
|
| 3702 |
|
|
12'b010010000110,
|
| 3703 |
|
|
12'b010010001100,
|
| 3704 |
|
|
12'b010010001101,
|
| 3705 |
|
|
12'b010010001110,
|
| 3706 |
|
|
12'b010010010100,
|
| 3707 |
|
|
12'b010010010101,
|
| 3708 |
|
|
12'b010010010110,
|
| 3709 |
|
|
12'b010010011100,
|
| 3710 |
|
|
12'b010010011101,
|
| 3711 |
|
|
12'b010010011110,
|
| 3712 |
|
|
12'b010010111100,
|
| 3713 |
|
|
12'b010010111101,
|
| 3714 |
|
|
12'b010010111110,
|
| 3715 |
|
|
12'b010100100100,
|
| 3716 |
|
|
12'b010100100101,
|
| 3717 |
|
|
12'b010100101100,
|
| 3718 |
|
|
12'b010100101101,
|
| 3719 |
|
|
12'b010100xx1001,
|
| 3720 |
|
|
12'b010110000100,
|
| 3721 |
|
|
12'b010110000101,
|
| 3722 |
|
|
12'b010110000110,
|
| 3723 |
|
|
12'b010110001100,
|
| 3724 |
|
|
12'b010110001101,
|
| 3725 |
|
|
12'b010110001110,
|
| 3726 |
|
|
12'b010110010100,
|
| 3727 |
|
|
12'b010110010101,
|
| 3728 |
|
|
12'b010110010110,
|
| 3729 |
|
|
12'b010110011100,
|
| 3730 |
|
|
12'b010110011101,
|
| 3731 |
|
|
12'b010110011110,
|
| 3732 |
|
|
12'b010110111100,
|
| 3733 |
|
|
12'b010110111101,
|
| 3734 |
|
|
12'b010110111110,
|
| 3735 |
|
|
12'b1xxx01000100,
|
| 3736 |
|
|
12'b1xxx01xx0010,
|
| 3737 |
2 |
bsa |
12'b1xxx01xx1010: hflg_ctl = `HFLG_H;
|
| 3738 |
|
|
default: hflg_ctl = `HFLG_NUL;
|
| 3739 |
|
|
endcase
|
| 3740 |
|
|
end
|
| 3741 |
|
|
default: hflg_ctl = `HFLG_NUL;
|
| 3742 |
|
|
endcase
|
| 3743 |
|
|
end
|
| 3744 |
|
|
|
| 3745 |
|
|
/*****************************************************************************************/
|
| 3746 |
|
|
/* */
|
| 3747 |
|
|
/* pv flag control */
|
| 3748 |
|
|
/* */
|
| 3749 |
|
|
/*****************************************************************************************/
|
| 3750 |
|
|
always @ (inst_reg or page_reg or state_reg) begin
|
| 3751 |
|
|
casex (state_reg) //synopsys parallel_case
|
| 3752 |
|
|
`RD1A,
|
| 3753 |
|
|
`RD2A: begin
|
| 3754 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 3755 |
|
|
12'b1xxx10100000,
|
| 3756 |
|
|
12'b1xxx10100001,
|
| 3757 |
|
|
12'b1xxx10101000,
|
| 3758 |
|
|
12'b1xxx10101001,
|
| 3759 |
|
|
12'b1xxx10110000,
|
| 3760 |
|
|
12'b1xxx10110001,
|
| 3761 |
|
|
12'b1xxx10111000,
|
| 3762 |
|
|
12'b1xxx10111001: pflg_ctl = `PFLG_B;
|
| 3763 |
|
|
default: pflg_ctl = `PFLG_NUL;
|
| 3764 |
|
|
endcase
|
| 3765 |
|
|
end
|
| 3766 |
|
|
`WR2A: begin
|
| 3767 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 3768 |
4 |
bsa |
12'b001000xxxxxx,
|
| 3769 |
|
|
12'b011x00xxxxxx: pflg_ctl = `PFLG_P;
|
| 3770 |
2 |
bsa |
12'b000000110100,
|
| 3771 |
|
|
12'b000000110101,
|
| 3772 |
|
|
12'b010000110100,
|
| 3773 |
|
|
12'b010000110101,
|
| 3774 |
|
|
12'b010100110100,
|
| 3775 |
|
|
12'b010100110101: pflg_ctl = `PFLG_V;
|
| 3776 |
|
|
default: pflg_ctl = `PFLG_NUL;
|
| 3777 |
|
|
endcase
|
| 3778 |
|
|
end
|
| 3779 |
|
|
`IF1B: begin
|
| 3780 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 3781 |
|
|
12'b1xxx01010111,
|
| 3782 |
|
|
12'b1xxx01011111: pflg_ctl = `PFLG_F;
|
| 3783 |
4 |
bsa |
12'b000000100111,
|
| 3784 |
|
|
12'b000010100110,
|
| 3785 |
|
|
12'b000010100xxx,
|
| 3786 |
|
|
12'b000010101110,
|
| 3787 |
|
|
12'b000010101xxx,
|
| 3788 |
|
|
12'b000010110110,
|
| 3789 |
|
|
12'b000010110xxx,
|
| 3790 |
|
|
12'b000011100110,
|
| 3791 |
|
|
12'b000011101110,
|
| 3792 |
|
|
12'b000011110110,
|
| 3793 |
|
|
12'b001000xxx0xx,12'b001000xxx10x,12'b001000xxx111,
|
| 3794 |
|
|
12'b010010100100,
|
| 3795 |
|
|
12'b010010100101,
|
| 3796 |
|
|
12'b010010100110,
|
| 3797 |
|
|
12'b010010101100,
|
| 3798 |
|
|
12'b010010101101,
|
| 3799 |
|
|
12'b010010101110,
|
| 3800 |
|
|
12'b010010110100,
|
| 3801 |
|
|
12'b010010110101,
|
| 3802 |
|
|
12'b010010110110,
|
| 3803 |
|
|
12'b010110100100,
|
| 3804 |
|
|
12'b010110100101,
|
| 3805 |
|
|
12'b010110100110,
|
| 3806 |
|
|
12'b010110101100,
|
| 3807 |
|
|
12'b010110101101,
|
| 3808 |
|
|
12'b010110101110,
|
| 3809 |
|
|
12'b010110110100,
|
| 3810 |
|
|
12'b010110110101,
|
| 3811 |
|
|
12'b010110110110,
|
| 3812 |
|
|
12'b1xxx01100111,
|
| 3813 |
|
|
12'b1xxx01101111,
|
| 3814 |
2 |
bsa |
12'b1xxx01xxx000: pflg_ctl = `PFLG_P;
|
| 3815 |
4 |
bsa |
12'b0000000xx100,12'b00000010x100,12'b000000111100,
|
| 3816 |
|
|
12'b0000000xx101,12'b00000010x101,12'b000000111101,
|
| 3817 |
|
|
12'b000010000110,
|
| 3818 |
|
|
12'b000010000xxx,
|
| 3819 |
|
|
12'b000010001110,
|
| 3820 |
|
|
12'b000010001xxx,
|
| 3821 |
|
|
12'b000010010110,
|
| 3822 |
|
|
12'b000010010xxx,
|
| 3823 |
|
|
12'b000010011110,
|
| 3824 |
|
|
12'b000010011xxx,
|
| 3825 |
|
|
12'b000010111110,
|
| 3826 |
|
|
12'b000010111xxx,
|
| 3827 |
|
|
12'b000011000110,
|
| 3828 |
|
|
12'b000011001110,
|
| 3829 |
|
|
12'b000011010110,
|
| 3830 |
|
|
12'b000011011110,
|
| 3831 |
|
|
12'b000011111110,
|
| 3832 |
|
|
12'b010000100100,
|
| 3833 |
|
|
12'b010000100101,
|
| 3834 |
|
|
12'b010000101100,
|
| 3835 |
|
|
12'b010000101101,
|
| 3836 |
|
|
12'b010010000100,
|
| 3837 |
|
|
12'b010010000101,
|
| 3838 |
|
|
12'b010010000110,
|
| 3839 |
|
|
12'b010010001100,
|
| 3840 |
|
|
12'b010010001101,
|
| 3841 |
|
|
12'b010010001110,
|
| 3842 |
|
|
12'b010010010100,
|
| 3843 |
|
|
12'b010010010101,
|
| 3844 |
|
|
12'b010010010110,
|
| 3845 |
|
|
12'b010010011100,
|
| 3846 |
|
|
12'b010010011101,
|
| 3847 |
|
|
12'b010010011110,
|
| 3848 |
|
|
12'b010010111100,
|
| 3849 |
|
|
12'b010010111101,
|
| 3850 |
|
|
12'b010010111110,
|
| 3851 |
|
|
12'b010100100100,
|
| 3852 |
|
|
12'b010100100101,
|
| 3853 |
|
|
12'b010100101100,
|
| 3854 |
|
|
12'b010100101101,
|
| 3855 |
|
|
12'b010110000100,
|
| 3856 |
|
|
12'b010110000101,
|
| 3857 |
|
|
12'b010110000110,
|
| 3858 |
|
|
12'b010110001100,
|
| 3859 |
|
|
12'b010110001101,
|
| 3860 |
|
|
12'b010110001110,
|
| 3861 |
|
|
12'b010110010100,
|
| 3862 |
|
|
12'b010110010101,
|
| 3863 |
|
|
12'b010110010110,
|
| 3864 |
|
|
12'b010110011100,
|
| 3865 |
|
|
12'b010110011101,
|
| 3866 |
|
|
12'b010110011110,
|
| 3867 |
|
|
12'b010110111100,
|
| 3868 |
|
|
12'b010110111101,
|
| 3869 |
|
|
12'b010110111110,
|
| 3870 |
|
|
12'b1xxx01000100,
|
| 3871 |
|
|
12'b1xxx01xx0010,
|
| 3872 |
2 |
bsa |
12'b1xxx01xx1010: pflg_ctl = `PFLG_V;
|
| 3873 |
|
|
default: pflg_ctl = `PFLG_NUL;
|
| 3874 |
|
|
endcase
|
| 3875 |
|
|
end
|
| 3876 |
|
|
default: pflg_ctl = `PFLG_NUL;
|
| 3877 |
|
|
endcase
|
| 3878 |
|
|
end
|
| 3879 |
|
|
|
| 3880 |
|
|
/*****************************************************************************************/
|
| 3881 |
|
|
/* */
|
| 3882 |
|
|
/* n flag control */
|
| 3883 |
|
|
/* */
|
| 3884 |
|
|
/*****************************************************************************************/
|
| 3885 |
|
|
always @ (inst_reg or page_reg or state_reg) begin
|
| 3886 |
|
|
casex (state_reg) //synopsys parallel_case
|
| 3887 |
|
|
`WR1A,
|
| 3888 |
|
|
`WR2A: begin
|
| 3889 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 3890 |
|
|
12'b1xxx10100010,
|
| 3891 |
|
|
12'b1xxx10100011,
|
| 3892 |
|
|
12'b1xxx10101010,
|
| 3893 |
|
|
12'b1xxx10101011,
|
| 3894 |
|
|
12'b1xxx10110010,
|
| 3895 |
|
|
12'b1xxx10110011,
|
| 3896 |
|
|
12'b1xxx10111010,
|
| 3897 |
|
|
12'b1xxx10111011: nflg_ctl = `NFLG_S;
|
| 3898 |
|
|
default: nflg_ctl = `NFLG_NUL;
|
| 3899 |
|
|
endcase
|
| 3900 |
|
|
end
|
| 3901 |
|
|
`IF1B: begin
|
| 3902 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 3903 |
4 |
bsa |
12'b000000000111,
|
| 3904 |
|
|
12'b000000001111,
|
| 3905 |
|
|
12'b000000010111,
|
| 3906 |
|
|
12'b000000011111,
|
| 3907 |
|
|
12'b000000110100,
|
| 3908 |
|
|
12'b000000110111,
|
| 3909 |
|
|
12'b000000111111,
|
| 3910 |
|
|
12'b000000xxx100,
|
| 3911 |
|
|
12'b000000xx1001,
|
| 3912 |
|
|
12'b000010000110,
|
| 3913 |
|
|
12'b000010000xxx,
|
| 3914 |
|
|
12'b000010001110,
|
| 3915 |
|
|
12'b000010001xxx,
|
| 3916 |
|
|
12'b000010100110,
|
| 3917 |
|
|
12'b000010100xxx,
|
| 3918 |
|
|
12'b000010101110,
|
| 3919 |
|
|
12'b000010101xxx,
|
| 3920 |
|
|
12'b000010110110,
|
| 3921 |
|
|
12'b000010110xxx,
|
| 3922 |
|
|
12'b000011000110,
|
| 3923 |
|
|
12'b000011001110,
|
| 3924 |
|
|
12'b000011100110,
|
| 3925 |
|
|
12'b000011101110,
|
| 3926 |
|
|
12'b000011110110,
|
| 3927 |
|
|
12'b010000100100,
|
| 3928 |
|
|
12'b010000101100,
|
| 3929 |
|
|
12'b010000110100,
|
| 3930 |
|
|
12'b010000xx1001,
|
| 3931 |
|
|
12'b010010000100,
|
| 3932 |
|
|
12'b010010000101,
|
| 3933 |
|
|
12'b010010000110,
|
| 3934 |
|
|
12'b010010001100,
|
| 3935 |
|
|
12'b010010001101,
|
| 3936 |
|
|
12'b010010001110,
|
| 3937 |
|
|
12'b010010100100,
|
| 3938 |
|
|
12'b010010100101,
|
| 3939 |
|
|
12'b010010100110,
|
| 3940 |
|
|
12'b010010101100,
|
| 3941 |
|
|
12'b010010101101,
|
| 3942 |
|
|
12'b010010101110,
|
| 3943 |
|
|
12'b010010110100,
|
| 3944 |
|
|
12'b010010110101,
|
| 3945 |
|
|
12'b010010110110,
|
| 3946 |
|
|
12'b010100100100,
|
| 3947 |
|
|
12'b010100101100,
|
| 3948 |
|
|
12'b010100110100,
|
| 3949 |
|
|
12'b010100xx1001,
|
| 3950 |
|
|
12'b010110000100,
|
| 3951 |
|
|
12'b010110000101,
|
| 3952 |
|
|
12'b010110000110,
|
| 3953 |
|
|
12'b010110001100,
|
| 3954 |
|
|
12'b010110001101,
|
| 3955 |
|
|
12'b010110001110,
|
| 3956 |
|
|
12'b010110100100,
|
| 3957 |
|
|
12'b010110100101,
|
| 3958 |
|
|
12'b010110100110,
|
| 3959 |
|
|
12'b010110101100,
|
| 3960 |
|
|
12'b010110101101,
|
| 3961 |
|
|
12'b010110101110,
|
| 3962 |
|
|
12'b010110110100,
|
| 3963 |
|
|
12'b010110110101,
|
| 3964 |
|
|
12'b010110110110,
|
| 3965 |
|
|
12'b00100xxxxxxx,
|
| 3966 |
|
|
12'b011x0xxxxxxx,
|
| 3967 |
|
|
12'b1xxx01010111,
|
| 3968 |
|
|
12'b1xxx01011111,
|
| 3969 |
|
|
12'b1xxx01100111,
|
| 3970 |
|
|
12'b1xxx01101111,
|
| 3971 |
|
|
12'b1xxx01xxx000,
|
| 3972 |
|
|
12'b1xxx01xx1010,
|
| 3973 |
|
|
12'b1xxx10100000,
|
| 3974 |
|
|
12'b1xxx10101000,
|
| 3975 |
|
|
12'b1xxx10110000,
|
| 3976 |
2 |
bsa |
12'b1xxx10111000: nflg_ctl = `NFLG_0;
|
| 3977 |
4 |
bsa |
12'b000000101111,
|
| 3978 |
|
|
12'b000000110101,
|
| 3979 |
|
|
12'b000000xxx101,
|
| 3980 |
|
|
12'b000010010110,
|
| 3981 |
|
|
12'b000010010xxx,
|
| 3982 |
|
|
12'b000010011110,
|
| 3983 |
|
|
12'b000010011xxx,
|
| 3984 |
|
|
12'b000010111110,
|
| 3985 |
|
|
12'b000010111xxx,
|
| 3986 |
|
|
12'b000011010110,
|
| 3987 |
|
|
12'b000011011110,
|
| 3988 |
|
|
12'b000011111110,
|
| 3989 |
|
|
12'b010000100101,
|
| 3990 |
|
|
12'b010000101101,
|
| 3991 |
|
|
12'b010000110101,
|
| 3992 |
|
|
12'b010010010100,
|
| 3993 |
|
|
12'b010010010101,
|
| 3994 |
|
|
12'b010010010110,
|
| 3995 |
|
|
12'b010010011100,
|
| 3996 |
|
|
12'b010010011101,
|
| 3997 |
|
|
12'b010010011110,
|
| 3998 |
|
|
12'b010010111100,
|
| 3999 |
|
|
12'b010010111101,
|
| 4000 |
|
|
12'b010010111110,
|
| 4001 |
|
|
12'b010100100101,
|
| 4002 |
|
|
12'b010100101101,
|
| 4003 |
|
|
12'b010100110101,
|
| 4004 |
|
|
12'b010110010100,
|
| 4005 |
|
|
12'b010110010101,
|
| 4006 |
|
|
12'b010110010110,
|
| 4007 |
|
|
12'b010110011100,
|
| 4008 |
|
|
12'b010110011101,
|
| 4009 |
|
|
12'b010110011110,
|
| 4010 |
|
|
12'b010110111100,
|
| 4011 |
|
|
12'b010110111101,
|
| 4012 |
|
|
12'b010110111110,
|
| 4013 |
|
|
12'b1xxx01000100,
|
| 4014 |
|
|
12'b1xxx01xx0010,
|
| 4015 |
|
|
12'b1xxx10100001,
|
| 4016 |
|
|
12'b1xxx10101001,
|
| 4017 |
|
|
12'b1xxx10110001,
|
| 4018 |
2 |
bsa |
12'b1xxx10111001: nflg_ctl = `NFLG_1;
|
| 4019 |
|
|
default: nflg_ctl = `NFLG_NUL;
|
| 4020 |
|
|
endcase
|
| 4021 |
|
|
end
|
| 4022 |
|
|
default: nflg_ctl = `NFLG_NUL;
|
| 4023 |
|
|
endcase
|
| 4024 |
|
|
end
|
| 4025 |
|
|
|
| 4026 |
|
|
/*****************************************************************************************/
|
| 4027 |
|
|
/* */
|
| 4028 |
|
|
/* c flag control */
|
| 4029 |
|
|
/* */
|
| 4030 |
|
|
/*****************************************************************************************/
|
| 4031 |
|
|
always @ (inst_reg or page_reg or state_reg) begin
|
| 4032 |
|
|
casex (state_reg) //synopsys parallel_case
|
| 4033 |
|
|
`WR2A: begin
|
| 4034 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 4035 |
4 |
bsa |
12'b001000xxxxxx,
|
| 4036 |
|
|
12'b011x00xxxxxx: cflg_en = 1'b1;
|
| 4037 |
2 |
bsa |
default: cflg_en = 1'b0;
|
| 4038 |
|
|
endcase
|
| 4039 |
|
|
end
|
| 4040 |
|
|
`IF1B: begin
|
| 4041 |
|
|
casex ({page_reg, inst_reg}) //synopsys parallel_case
|
| 4042 |
4 |
bsa |
12'b000010100110,
|
| 4043 |
|
|
12'b000010100xxx,
|
| 4044 |
|
|
12'b000010101110,
|
| 4045 |
|
|
12'b000010101xxx,
|
| 4046 |
|
|
12'b000010110110,
|
| 4047 |
|
|
12'b000010110xxx,
|
| 4048 |
|
|
12'b000011100110,
|
| 4049 |
|
|
12'b000011101110,
|
| 4050 |
|
|
12'b000011110110,
|
| 4051 |
|
|
12'b010010100100,
|
| 4052 |
|
|
12'b010010100101,
|
| 4053 |
|
|
12'b010010100110,
|
| 4054 |
|
|
12'b010010101100,
|
| 4055 |
|
|
12'b010010101101,
|
| 4056 |
|
|
12'b010010101110,
|
| 4057 |
|
|
12'b010010110100,
|
| 4058 |
|
|
12'b010010110101,
|
| 4059 |
|
|
12'b010010110110,
|
| 4060 |
|
|
12'b010110100100,
|
| 4061 |
|
|
12'b010110100101,
|
| 4062 |
|
|
12'b010110100110,
|
| 4063 |
|
|
12'b010110101100,
|
| 4064 |
|
|
12'b010110101101,
|
| 4065 |
|
|
12'b010110101110,
|
| 4066 |
|
|
12'b010110110100,
|
| 4067 |
|
|
12'b010110110101,
|
| 4068 |
|
|
12'b010110110110,
|
| 4069 |
|
|
12'b000000110111,
|
| 4070 |
|
|
12'b000000000111,
|
| 4071 |
|
|
12'b000000001111,
|
| 4072 |
|
|
12'b000000010111,
|
| 4073 |
|
|
12'b000000011111,
|
| 4074 |
|
|
12'b000000100111,
|
| 4075 |
|
|
12'b000000111111,
|
| 4076 |
|
|
12'b000000xx1001,
|
| 4077 |
|
|
12'b000010000110,
|
| 4078 |
|
|
12'b000010000xxx,
|
| 4079 |
|
|
12'b000010001110,
|
| 4080 |
|
|
12'b000010001xxx,
|
| 4081 |
|
|
12'b000010010110,
|
| 4082 |
|
|
12'b000010010xxx,
|
| 4083 |
|
|
12'b000010011110,
|
| 4084 |
|
|
12'b000010011xxx,
|
| 4085 |
|
|
12'b000010111110,
|
| 4086 |
|
|
12'b000010111xxx,
|
| 4087 |
|
|
12'b000011000110,
|
| 4088 |
|
|
12'b000011001110,
|
| 4089 |
|
|
12'b000011010110,
|
| 4090 |
|
|
12'b000011011110,
|
| 4091 |
|
|
12'b000011111110,
|
| 4092 |
|
|
12'b001000xxx0xx,12'b001000xxx10x,12'b001000xxx111,
|
| 4093 |
|
|
12'b010000xx1001,
|
| 4094 |
|
|
12'b010010000100,
|
| 4095 |
|
|
12'b010010000101,
|
| 4096 |
|
|
12'b010010000110,
|
| 4097 |
|
|
12'b010010001100,
|
| 4098 |
|
|
12'b010010001101,
|
| 4099 |
|
|
12'b010010001110,
|
| 4100 |
|
|
12'b010010010100,
|
| 4101 |
|
|
12'b010010010101,
|
| 4102 |
|
|
12'b010010010110,
|
| 4103 |
|
|
12'b010010011100,
|
| 4104 |
|
|
12'b010010011101,
|
| 4105 |
|
|
12'b010010011110,
|
| 4106 |
|
|
12'b010010111100,
|
| 4107 |
|
|
12'b010010111101,
|
| 4108 |
|
|
12'b010010111110,
|
| 4109 |
|
|
12'b010100xx1001,
|
| 4110 |
|
|
12'b010110000100,
|
| 4111 |
|
|
12'b010110000101,
|
| 4112 |
|
|
12'b010110000110,
|
| 4113 |
|
|
12'b010110001100,
|
| 4114 |
|
|
12'b010110001101,
|
| 4115 |
|
|
12'b010110001110,
|
| 4116 |
|
|
12'b010110010100,
|
| 4117 |
|
|
12'b010110010101,
|
| 4118 |
|
|
12'b010110010110,
|
| 4119 |
|
|
12'b010110011100,
|
| 4120 |
|
|
12'b010110011101,
|
| 4121 |
|
|
12'b010110011110,
|
| 4122 |
|
|
12'b010110111100,
|
| 4123 |
|
|
12'b010110111101,
|
| 4124 |
|
|
12'b010110111110,
|
| 4125 |
|
|
12'b1xxx01000100,
|
| 4126 |
|
|
12'b1xxx01xx0010,
|
| 4127 |
2 |
bsa |
12'b1xxx01xx1010: cflg_en = 1'b1;
|
| 4128 |
|
|
default: cflg_en = 1'b0;
|
| 4129 |
|
|
endcase
|
| 4130 |
|
|
end
|
| 4131 |
|
|
default: cflg_en = 1'b0;
|
| 4132 |
|
|
endcase
|
| 4133 |
|
|
end
|
| 4134 |
|
|
|
| 4135 |
|
|
/*****************************************************************************************/
|
| 4136 |
|
|
/* */
|
| 4137 |
|
|
/* temporary flag control */
|
| 4138 |
|
|
/* */
|
| 4139 |
|
|
/*****************************************************************************************/
|
| 4140 |
|
|
always @ (inst_reg or page_reg or state_reg) begin
|
| 4141 |
|
|
casex (state_reg) //synopsys parallel_case
|
| 4142 |
|
|
`OF1B: tflg_ctl = `TFLG_Z;
|
| 4143 |
|
|
`RD1A,
|
| 4144 |
|
|
`RD2A: begin
|
| 4145 |
|
|
casex ({page_reg, inst_reg})
|
| 4146 |
|
|
12'b1xxx10100011,
|
| 4147 |
|
|
12'b1xxx10101011,
|
| 4148 |
|
|
12'b1xxx10110011,
|
| 4149 |
|
|
12'b1xxx10111011: tflg_ctl = `TFLG_1;
|
| 4150 |
|
|
default: tflg_ctl = `TFLG_Z;
|
| 4151 |
|
|
endcase
|
| 4152 |
|
|
end
|
| 4153 |
|
|
`BLK1: tflg_ctl = `TFLG_B;
|
| 4154 |
|
|
default: tflg_ctl = `TFLG_NUL;
|
| 4155 |
|
|
endcase
|
| 4156 |
|
|
end
|
| 4157 |
|
|
|
| 4158 |
|
|
endmodule
|
| 4159 |
|
|
|
| 4160 |
|
|
|
| 4161 |
|
|
|
| 4162 |
|
|
|
| 4163 |
|
|
|
