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Line 1... |
////////////////////////////////////////////////////////////////////// //// ////
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//////////////////////////////////////////////////////////////////////
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//// ////
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//// 8051 core decoder ////
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//// 8051 core decoder ////
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//// ////
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//// ////
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//// This file is part of the 8051 cores project ////
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//// This file is part of the 8051 cores project ////
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//// http://www.opencores.org/cores/8051/ ////
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//// http://www.opencores.org/cores/8051/ ////
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//// ////
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//// ////
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Line 53... |
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module oc8051_decoder (clk, rst, op_in, eq, ram_rd_sel, ram_wr_sel, bit_addr,
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module oc8051_decoder (clk, rst, op_in, eq, ram_rd_sel, ram_wr_sel, bit_addr,
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wr, src_sel1, src_sel2, src_sel3, alu_op, psw_set, cy_sel, imm_sel, pc_wr,
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wr, src_sel1, src_sel2, src_sel3, alu_op, psw_set, cy_sel, imm_sel, pc_wr,
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pc_sel, comp_sel, rom_addr_sel, ext_addr_sel, wad2, rd, write_x, reti,
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pc_sel, comp_sel, rom_addr_sel, ext_addr_sel, wad2, rd, we_o, reti,
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rmw);
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rmw, stb_o, ack_i, wr_xaddr);
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//
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//
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// clk (in) clock
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// clk (in) clock
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// rst (in) reset
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// rst (in) reset
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// op_in (in) operation code [oc8051_op_select.op1]
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// op_in (in) operation code [oc8051_op_select.op1]
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// eq (in) compare result [oc8051_comp.eq]
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// eq (in) compare result [oc8051_comp.eq]
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| Line 77... |
Line 78... |
// pc_wr (out) pc write [oc8051_pc.wr]
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// pc_wr (out) pc write [oc8051_pc.wr]
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// pc_sel (out) pc select [oc8051_pc.pc_wr_sel]
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// pc_sel (out) pc select [oc8051_pc.pc_wr_sel]
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// rom_addr_sel (out) rom address select (alu destination or pc) [oc8051_rom_addr_sel.select]
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// rom_addr_sel (out) rom address select (alu destination or pc) [oc8051_rom_addr_sel.select]
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// ext_addr_sel (out) external address select (dptr or Ri) [oc8051_ext_addr_sel.select]
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// ext_addr_sel (out) external address select (dptr or Ri) [oc8051_ext_addr_sel.select]
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// rd (out) read from rom [oc8051_pc.rd, oc8051_op_select.rd]
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// rd (out) read from rom [oc8051_pc.rd, oc8051_op_select.rd]
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// write_x (out) write to external rom [pin]
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// we_o (out) write to external rom [pin]
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// reti (out) return from interrupt [pin]
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// reti (out) return from interrupt [pin]
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// rmw (out) read modify write feature [oc8051_ports.rmw]
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// rmw (out) read modify write feature [oc8051_ports.rmw]
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//
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//
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input clk, rst, eq;
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input clk, rst, eq, ack_i;
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input [7:0] op_in;
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input [7:0] op_in;
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output wr, reti, write_x, bit_addr, src_sel3, rom_addr_sel, ext_addr_sel,
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output wr, reti, we_o, bit_addr, src_sel3, rom_addr_sel, ext_addr_sel,
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pc_wr, wad2, rmw;
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pc_wr, wad2, rmw, stb_o, wr_xaddr;
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output [1:0] ram_rd_sel, src_sel1, src_sel2, psw_set, cy_sel, pc_sel, comp_sel;
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output [1:0] ram_rd_sel, src_sel1, src_sel2, psw_set, cy_sel, pc_sel, comp_sel;
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output [2:0] ram_wr_sel, imm_sel;
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output [2:0] ram_wr_sel, imm_sel;
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output [3:0] alu_op;
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output [3:0] alu_op;
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output rd;
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output rd;
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reg reti, write_x, rmw;
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reg reti, write_x, rmw, stb_buff, we_buff;
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reg wr, bit_addr, src_sel3, rom_addr_sel, ext_addr_sel, pc_wr, wad2;
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reg wr, bit_addr, src_sel3, rom_addr_sel, ext_addr_sel, pc_wr, wad2, stb, stbw, wr_xaddr;
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reg [1:0] comp_sel, psw_set, ram_rd_sel, src_sel1, src_sel2, pc_sel, cy_sel;
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reg [1:0] comp_sel, psw_set, ram_rd_sel, src_sel1, src_sel2, pc_sel, cy_sel;
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reg [3:0] alu_op;
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reg [3:0] alu_op;
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reg [2:0] ram_wr_sel, imm_sel;
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reg [2:0] ram_wr_sel, imm_sel;
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//
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//
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Line 107... |
reg [1:0] state;
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reg [1:0] state;
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reg [7:0] op;
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reg [7:0] op;
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//
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//
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// if state = 2'b00 then read nex instruction
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// if state = 2'b00 then read nex instruction
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assign rd = !state[0] & !state[1];
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assign rd = !state[0] && !state[1] && !stb_o;
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assign stb_o = stb_buff || stbw;
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assign we_o = we_buff;
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//assign we_o = write_x || we_buff;
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//
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//
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// main block
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// main block
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// case of instruction set control signals
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// case of instruction set control signals
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always @(op_in or eq or state or op)
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always @(op_in or eq or state or op or stb_o)
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begin
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begin
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if (stb_o) begin
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ram_rd_sel = `OC8051_RRS_DC;
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ram_wr_sel = `OC8051_RWS_DC;
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src_sel1 = `OC8051_ASS_DC;
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src_sel2 = `OC8051_ASS_DC;
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alu_op = `OC8051_ALU_NOP;
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imm_sel = `OC8051_IDS_DC;
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wr = 1'b0;
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psw_set = `OC8051_PS_NOT;
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cy_sel = `OC8051_CY_0;
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pc_wr = `OC8051_PCW_N;
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pc_sel = `OC8051_PIS_DC;
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src_sel3 = `OC8051_AS3_DC;
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comp_sel = `OC8051_CSS_DC;
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rmw = `OC8051_RMW_N; bit_addr = 1'b0;
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wad2 = `OC8051_WAD_N;
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rom_addr_sel = `OC8051_RAS_PC;
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end else begin
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case (state)
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case (state)
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2'b01: begin
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2'b01: begin
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casex (op)
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casex (op)
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`OC8051_ACALL :begin
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`OC8051_ACALL :begin
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ram_rd_sel = `OC8051_RRS_DC;
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ram_rd_sel = `OC8051_RRS_DC;
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| Line 135... |
Line 158... |
comp_sel = `OC8051_CSS_DC;
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comp_sel = `OC8051_CSS_DC;
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rmw = `OC8051_RMW_N;
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rmw = `OC8051_RMW_N;
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bit_addr = 1'b0;
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bit_addr = 1'b0;
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wad2 = `OC8051_WAD_N;
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wad2 = `OC8051_WAD_N;
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rom_addr_sel = `OC8051_RAS_PC;
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rom_addr_sel = `OC8051_RAS_PC;
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ext_addr_sel = `OC8051_EAS_DC;
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end
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end
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`OC8051_AJMP : begin
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`OC8051_AJMP : begin
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ram_rd_sel = `OC8051_RRS_DC;
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ram_rd_sel = `OC8051_RRS_DC;
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ram_wr_sel = `OC8051_RWS_DC;
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ram_wr_sel = `OC8051_RWS_DC;
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| Line 157... |
Line 180... |
comp_sel = `OC8051_CSS_DC;
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comp_sel = `OC8051_CSS_DC;
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rmw = `OC8051_RMW_N;
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rmw = `OC8051_RMW_N;
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bit_addr = 1'b0;
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bit_addr = 1'b0;
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wad2 = `OC8051_WAD_N;
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wad2 = `OC8051_WAD_N;
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rom_addr_sel = `OC8051_RAS_PC;
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rom_addr_sel = `OC8051_RAS_PC;
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ext_addr_sel = `OC8051_EAS_DC;
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end
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end
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`OC8051_LCALL :begin
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`OC8051_LCALL :begin
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ram_rd_sel = `OC8051_RRS_DC;
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ram_rd_sel = `OC8051_RRS_DC;
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ram_wr_sel = `OC8051_RWS_SP;
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ram_wr_sel = `OC8051_RWS_SP;
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| Line 179... |
Line 202... |
comp_sel = `OC8051_CSS_DC;
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comp_sel = `OC8051_CSS_DC;
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rmw = `OC8051_RMW_N;
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rmw = `OC8051_RMW_N;
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bit_addr = 1'b0;
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bit_addr = 1'b0;
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wad2 = `OC8051_WAD_N;
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wad2 = `OC8051_WAD_N;
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rom_addr_sel = `OC8051_RAS_PC;
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rom_addr_sel = `OC8051_RAS_PC;
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ext_addr_sel = `OC8051_EAS_DC;
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end
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end
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`OC8051_MOVC_DP :begin
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`OC8051_MOVC_DP :begin
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ram_rd_sel = `OC8051_RRS_DC;
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ram_rd_sel = `OC8051_RRS_DC;
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ram_wr_sel = `OC8051_RWS_ACC;
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ram_wr_sel = `OC8051_RWS_ACC;
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Line 222... |
src_sel3 = `OC8051_AS3_DP;
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src_sel3 = `OC8051_AS3_DP;
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comp_sel = `OC8051_CSS_DC;
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comp_sel = `OC8051_CSS_DC;
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rmw = `OC8051_RMW_N; bit_addr = 1'b0;
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rmw = `OC8051_RMW_N; bit_addr = 1'b0;
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wad2 = `OC8051_WAD_N;
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wad2 = `OC8051_WAD_N;
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rom_addr_sel = `OC8051_RAS_PC;
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rom_addr_sel = `OC8051_RAS_PC;
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ext_addr_sel = `OC8051_EAS_DC;
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end
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end
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`OC8051_MOVC_PC :begin
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`OC8051_MOVC_PC :begin
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ram_rd_sel = `OC8051_RRS_DC;
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ram_rd_sel = `OC8051_RRS_DC;
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ram_wr_sel = `OC8051_RWS_ACC;
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ram_wr_sel = `OC8051_RWS_ACC;
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| Line 219... |
Line 242... |
src_sel3 = `OC8051_AS3_PC;
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src_sel3 = `OC8051_AS3_PC;
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comp_sel = `OC8051_CSS_DC;
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comp_sel = `OC8051_CSS_DC;
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rmw = `OC8051_RMW_N; bit_addr = 1'b0;
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rmw = `OC8051_RMW_N; bit_addr = 1'b0;
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wad2 = `OC8051_WAD_N;
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wad2 = `OC8051_WAD_N;
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rom_addr_sel = `OC8051_RAS_PC;
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rom_addr_sel = `OC8051_RAS_PC;
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ext_addr_sel = `OC8051_EAS_DC;
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end
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end
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`OC8051_DIV : begin
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`OC8051_DIV : begin
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ram_rd_sel = `OC8051_RRS_D;
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ram_rd_sel = `OC8051_RRS_D;
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ram_wr_sel = `OC8051_RWS_B;
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ram_wr_sel = `OC8051_RWS_B;
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src_sel1 = `OC8051_ASS_ACC;
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src_sel1 = `OC8051_ASS_ACC;
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| Line 238... |
Line 261... |
src_sel3 = `OC8051_AS3_DC;
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src_sel3 = `OC8051_AS3_DC;
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comp_sel = `OC8051_CSS_DC;
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comp_sel = `OC8051_CSS_DC;
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rmw = `OC8051_RMW_N; bit_addr = 1'b0;
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rmw = `OC8051_RMW_N; bit_addr = 1'b0;
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wad2 = `OC8051_WAD_Y;
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wad2 = `OC8051_WAD_Y;
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rom_addr_sel = `OC8051_RAS_PC;
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rom_addr_sel = `OC8051_RAS_PC;
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ext_addr_sel = `OC8051_EAS_DC;
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end
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end
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`OC8051_MUL : begin
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`OC8051_MUL : begin
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ram_rd_sel = `OC8051_RRS_D;
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ram_rd_sel = `OC8051_RRS_D;
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ram_wr_sel = `OC8051_RWS_B;
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ram_wr_sel = `OC8051_RWS_B;
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src_sel1 = `OC8051_ASS_ACC;
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src_sel1 = `OC8051_ASS_ACC;
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| Line 257... |
Line 280... |
src_sel3 = `OC8051_AS3_DC;
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src_sel3 = `OC8051_AS3_DC;
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comp_sel = `OC8051_CSS_DC;
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comp_sel = `OC8051_CSS_DC;
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rmw = `OC8051_RMW_N; bit_addr = 1'b0;
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rmw = `OC8051_RMW_N; bit_addr = 1'b0;
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wad2 = `OC8051_WAD_Y;
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wad2 = `OC8051_WAD_Y;
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rom_addr_sel = `OC8051_RAS_PC;
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rom_addr_sel = `OC8051_RAS_PC;
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ext_addr_sel = `OC8051_EAS_DC;
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end
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end
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default begin
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default begin
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ram_rd_sel = `OC8051_RRS_DC;
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ram_rd_sel = `OC8051_RRS_DC;
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ram_wr_sel = `OC8051_RWS_DC;
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ram_wr_sel = `OC8051_RWS_DC;
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src_sel1 = `OC8051_ASS_DC;
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src_sel1 = `OC8051_ASS_DC;
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| Line 276... |
Line 299... |
src_sel3 = `OC8051_AS3_DC;
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src_sel3 = `OC8051_AS3_DC;
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comp_sel = `OC8051_CSS_DC;
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comp_sel = `OC8051_CSS_DC;
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rmw = `OC8051_RMW_N; bit_addr = 1'b0;
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rmw = `OC8051_RMW_N; bit_addr = 1'b0;
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wad2 = `OC8051_WAD_N;
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wad2 = `OC8051_WAD_N;
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rom_addr_sel = `OC8051_RAS_PC;
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rom_addr_sel = `OC8051_RAS_PC;
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ext_addr_sel = `OC8051_EAS_DC;
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end
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end
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endcase
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endcase
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end
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end
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2'b10:
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2'b10:
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| Line 300... |
Line 323... |
src_sel3 = `OC8051_AS3_DC;
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src_sel3 = `OC8051_AS3_DC;
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comp_sel = `OC8051_CSS_DES;
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comp_sel = `OC8051_CSS_DES;
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rmw = `OC8051_RMW_N; bit_addr = 1'b0;
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rmw = `OC8051_RMW_N; bit_addr = 1'b0;
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wad2 = `OC8051_WAD_N;
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wad2 = `OC8051_WAD_N;
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rom_addr_sel = `OC8051_RAS_PC;
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rom_addr_sel = `OC8051_RAS_PC;
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ext_addr_sel = `OC8051_EAS_DC;
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end
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end
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`OC8051_CJNE_I : begin
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`OC8051_CJNE_I : begin
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ram_rd_sel = `OC8051_RRS_DC;
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ram_rd_sel = `OC8051_RRS_DC;
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ram_wr_sel = `OC8051_RWS_DC;
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ram_wr_sel = `OC8051_RWS_DC;
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| Line 320... |
Line 343... |
src_sel3 = `OC8051_AS3_DC;
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src_sel3 = `OC8051_AS3_DC;
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comp_sel = `OC8051_CSS_DES;
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comp_sel = `OC8051_CSS_DES;
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rmw = `OC8051_RMW_N; bit_addr = 1'b0;
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rmw = `OC8051_RMW_N; bit_addr = 1'b0;
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wad2 = `OC8051_WAD_N;
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wad2 = `OC8051_WAD_N;
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rom_addr_sel = `OC8051_RAS_PC;
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rom_addr_sel = `OC8051_RAS_PC;
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ext_addr_sel = `OC8051_EAS_DC;
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end
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end
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`OC8051_CJNE_D : begin
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`OC8051_CJNE_D : begin
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ram_rd_sel = `OC8051_RRS_DC;
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ram_rd_sel = `OC8051_RRS_DC;
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ram_wr_sel = `OC8051_RWS_DC;
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ram_wr_sel = `OC8051_RWS_DC;
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| Line 340... |
Line 363... |
src_sel3 = `OC8051_AS3_DC;
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src_sel3 = `OC8051_AS3_DC;
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comp_sel = `OC8051_CSS_DES;
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comp_sel = `OC8051_CSS_DES;
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rmw = `OC8051_RMW_N; bit_addr = 1'b0;
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rmw = `OC8051_RMW_N; bit_addr = 1'b0;
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wad2 = `OC8051_WAD_N;
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wad2 = `OC8051_WAD_N;
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rom_addr_sel = `OC8051_RAS_PC;
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rom_addr_sel = `OC8051_RAS_PC;
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ext_addr_sel = `OC8051_EAS_DC;
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end
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end
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`OC8051_CJNE_C : begin
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`OC8051_CJNE_C : begin
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ram_rd_sel = `OC8051_RRS_DC;
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ram_rd_sel = `OC8051_RRS_DC;
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ram_wr_sel = `OC8051_RWS_DC;
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ram_wr_sel = `OC8051_RWS_DC;
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| Line 360... |
Line 383... |
src_sel3 = `OC8051_AS3_DC;
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src_sel3 = `OC8051_AS3_DC;
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comp_sel = `OC8051_CSS_DES;
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comp_sel = `OC8051_CSS_DES;
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rmw = `OC8051_RMW_N; bit_addr = 1'b0;
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rmw = `OC8051_RMW_N; bit_addr = 1'b0;
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wad2 = `OC8051_WAD_N;
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wad2 = `OC8051_WAD_N;
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rom_addr_sel = `OC8051_RAS_PC;
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rom_addr_sel = `OC8051_RAS_PC;
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ext_addr_sel = `OC8051_EAS_DC;
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end
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end
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`OC8051_DJNZ_R : begin
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`OC8051_DJNZ_R : begin
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ram_rd_sel = `OC8051_RRS_DC;
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ram_rd_sel = `OC8051_RRS_DC;
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ram_wr_sel = `OC8051_RWS_DC;
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ram_wr_sel = `OC8051_RWS_DC;
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| Line 380... |
Line 403... |
src_sel3 = `OC8051_AS3_DC;
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src_sel3 = `OC8051_AS3_DC;
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comp_sel = `OC8051_CSS_DES;
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comp_sel = `OC8051_CSS_DES;
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rmw = `OC8051_RMW_N; bit_addr = 1'b0;
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rmw = `OC8051_RMW_N; bit_addr = 1'b0;
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wad2 = `OC8051_WAD_N;
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wad2 = `OC8051_WAD_N;
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rom_addr_sel = `OC8051_RAS_PC;
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rom_addr_sel = `OC8051_RAS_PC;
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ext_addr_sel = `OC8051_EAS_DC;
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end
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end
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`OC8051_DJNZ_D : begin
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`OC8051_DJNZ_D : begin
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ram_rd_sel = `OC8051_RRS_DC;
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ram_rd_sel = `OC8051_RRS_DC;
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ram_wr_sel = `OC8051_RWS_DC;
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ram_wr_sel = `OC8051_RWS_DC;
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| Line 400... |
Line 423... |
src_sel3 = `OC8051_AS3_DC;
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src_sel3 = `OC8051_AS3_DC;
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comp_sel = `OC8051_CSS_DES;
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comp_sel = `OC8051_CSS_DES;
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rmw = `OC8051_RMW_N; bit_addr = 1'b0;
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rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
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wad2 = `OC8051_WAD_N;
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rom_addr_sel = `OC8051_RAS_PC;
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rom_addr_sel = `OC8051_RAS_PC;
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ext_addr_sel = `OC8051_EAS_DC;
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|
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end
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end
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`OC8051_JB : begin
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`OC8051_JB : begin
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ram_rd_sel = `OC8051_RRS_DC;
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ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
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| Line 420... |
Line 443... |
src_sel3 = `OC8051_AS3_DC;
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src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_BIT;
|
comp_sel = `OC8051_CSS_BIT;
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rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
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end
|
end
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`OC8051_JBC : begin
|
`OC8051_JBC : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_D;
|
ram_wr_sel = `OC8051_RWS_D;
|
| Line 440... |
Line 463... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_BIT;
|
comp_sel = `OC8051_CSS_BIT;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b1;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b1;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
|
|
end
|
end
|
`OC8051_JC : begin
|
`OC8051_JC : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
| Line 460... |
Line 483... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_CY;
|
comp_sel = `OC8051_CSS_CY;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
|
|
end
|
end
|
`OC8051_JMP : begin
|
`OC8051_JMP : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
| Line 480... |
Line 503... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_BIT;
|
comp_sel = `OC8051_CSS_BIT;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
|
|
end
|
end
|
`OC8051_JNB : begin
|
`OC8051_JNB : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
| Line 500... |
Line 523... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_BIT;
|
comp_sel = `OC8051_CSS_BIT;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
|
|
end
|
end
|
`OC8051_JNC : begin
|
`OC8051_JNC : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
| Line 520... |
Line 543... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_CY;
|
comp_sel = `OC8051_CSS_CY;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
|
|
end
|
end
|
`OC8051_JNZ : begin
|
`OC8051_JNZ : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
| Line 540... |
Line 563... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_AZ;
|
comp_sel = `OC8051_CSS_AZ;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
|
|
end
|
end
|
`OC8051_JZ : begin
|
`OC8051_JZ : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
| Line 560... |
Line 583... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_AZ;
|
comp_sel = `OC8051_CSS_AZ;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
|
|
end
|
end
|
`OC8051_MOVC_DP :begin
|
`OC8051_MOVC_DP :begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
| Line 580... |
Line 603... |
src_sel3 = `OC8051_AS3_DP;
|
src_sel3 = `OC8051_AS3_DP;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_DES;
|
rom_addr_sel = `OC8051_RAS_DES;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
|
|
end
|
end
|
`OC8051_MOVC_PC :begin
|
`OC8051_MOVC_PC :begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
| Line 600... |
Line 623... |
src_sel3 = `OC8051_AS3_PC;
|
src_sel3 = `OC8051_AS3_PC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_DES;
|
rom_addr_sel = `OC8051_RAS_DES;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_SJMP : begin
|
`OC8051_SJMP : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_DC;
|
src_sel1 = `OC8051_ASS_DC;
|
| Line 619... |
Line 642... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_DIV : begin
|
`OC8051_DIV : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_B;
|
ram_wr_sel = `OC8051_RWS_B;
|
src_sel1 = `OC8051_ASS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
| Line 638... |
Line 661... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_MUL : begin
|
`OC8051_MUL : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_B;
|
ram_wr_sel = `OC8051_RWS_B;
|
src_sel1 = `OC8051_ASS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
| Line 657... |
Line 680... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
default begin
|
default begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_DC;
|
src_sel1 = `OC8051_ASS_DC;
|
| Line 676... |
Line 699... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
endcase
|
endcase
|
|
|
2'b11:
|
2'b11:
|
casex (op)
|
casex (op)
|
| Line 699... |
Line 722... |
src_sel3 = `OC8051_AS3_PC;
|
src_sel3 = `OC8051_AS3_PC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_CJNE_I : begin
|
`OC8051_CJNE_I : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_IMM;
|
src_sel1 = `OC8051_ASS_IMM;
|
| Line 718... |
Line 741... |
src_sel3 = `OC8051_AS3_PC;
|
src_sel3 = `OC8051_AS3_PC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_CJNE_D : begin
|
`OC8051_CJNE_D : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_IMM;
|
src_sel1 = `OC8051_ASS_IMM;
|
| Line 737... |
Line 760... |
src_sel3 = `OC8051_AS3_PC;
|
src_sel3 = `OC8051_AS3_PC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_CJNE_C : begin
|
`OC8051_CJNE_C : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_IMM;
|
src_sel1 = `OC8051_ASS_IMM;
|
| Line 756... |
Line 779... |
src_sel3 = `OC8051_AS3_PC;
|
src_sel3 = `OC8051_AS3_PC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_DJNZ_R : begin
|
`OC8051_DJNZ_R : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_IMM;
|
src_sel1 = `OC8051_ASS_IMM;
|
| Line 775... |
Line 798... |
src_sel3 = `OC8051_AS3_PC;
|
src_sel3 = `OC8051_AS3_PC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_DJNZ_D : begin
|
`OC8051_DJNZ_D : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_IMM;
|
src_sel1 = `OC8051_ASS_IMM;
|
| Line 794... |
Line 817... |
src_sel3 = `OC8051_AS3_PC;
|
src_sel3 = `OC8051_AS3_PC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_RET : begin
|
`OC8051_RET : begin
|
ram_rd_sel = `OC8051_RRS_SP;
|
ram_rd_sel = `OC8051_RRS_SP;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 813... |
Line 836... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_RETI : begin
|
`OC8051_RETI : begin
|
ram_rd_sel = `OC8051_RRS_SP;
|
ram_rd_sel = `OC8051_RRS_SP;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 832... |
Line 855... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_DIV : begin
|
`OC8051_DIV : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_B;
|
ram_wr_sel = `OC8051_RWS_B;
|
src_sel1 = `OC8051_ASS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
| Line 851... |
Line 874... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_MUL : begin
|
`OC8051_MUL : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_B;
|
ram_wr_sel = `OC8051_RWS_B;
|
src_sel1 = `OC8051_ASS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
| Line 870... |
Line 893... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
default begin
|
default begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_DC;
|
src_sel1 = `OC8051_ASS_DC;
|
| Line 889... |
Line 912... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
endcase
|
endcase
|
default: begin
|
default: begin
|
casex (op_in)
|
casex (op_in)
|
`OC8051_ACALL :begin
|
`OC8051_ACALL :begin
|
| Line 911... |
Line 934... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_AJMP : begin
|
`OC8051_AJMP : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_DC;
|
src_sel1 = `OC8051_ASS_DC;
|
| Line 930... |
Line 953... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_ADD_R : begin
|
`OC8051_ADD_R : begin
|
ram_rd_sel = `OC8051_RRS_RN;
|
ram_rd_sel = `OC8051_RRS_RN;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
| Line 949... |
Line 972... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_ADDC_R : begin
|
`OC8051_ADDC_R : begin
|
ram_rd_sel = `OC8051_RRS_RN;
|
ram_rd_sel = `OC8051_RRS_RN;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
| Line 968... |
Line 991... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_ANL_R : begin
|
`OC8051_ANL_R : begin
|
ram_rd_sel = `OC8051_RRS_RN;
|
ram_rd_sel = `OC8051_RRS_RN;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
| Line 987... |
Line 1010... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_CJNE_R : begin
|
`OC8051_CJNE_R : begin
|
ram_rd_sel = `OC8051_RRS_RN;
|
ram_rd_sel = `OC8051_RRS_RN;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 1006... |
Line 1029... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_DEC_R : begin
|
`OC8051_DEC_R : begin
|
ram_rd_sel = `OC8051_RRS_RN;
|
ram_rd_sel = `OC8051_RRS_RN;
|
ram_wr_sel = `OC8051_RWS_RN;
|
ram_wr_sel = `OC8051_RWS_RN;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 1025... |
Line 1048... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_DJNZ_R : begin
|
`OC8051_DJNZ_R : begin
|
ram_rd_sel = `OC8051_RRS_RN;
|
ram_rd_sel = `OC8051_RRS_RN;
|
ram_wr_sel = `OC8051_RWS_RN;
|
ram_wr_sel = `OC8051_RWS_RN;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 1044... |
Line 1067... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_INC_R : begin
|
`OC8051_INC_R : begin
|
ram_rd_sel = `OC8051_RRS_RN;
|
ram_rd_sel = `OC8051_RRS_RN;
|
ram_wr_sel = `OC8051_RWS_RN;
|
ram_wr_sel = `OC8051_RWS_RN;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 1063... |
Line 1086... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_MOV_R : begin
|
`OC8051_MOV_R : begin
|
ram_rd_sel = `OC8051_RRS_RN;
|
ram_rd_sel = `OC8051_RRS_RN;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 1082... |
Line 1105... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
|
|
`OC8051_MOV_AR : begin
|
`OC8051_MOV_AR : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_RN;
|
ram_wr_sel = `OC8051_RWS_RN;
|
| Line 1102... |
Line 1125... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_MOV_DR : begin
|
`OC8051_MOV_DR : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_RN;
|
ram_wr_sel = `OC8051_RWS_RN;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 1121... |
Line 1144... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_MOV_CR : begin
|
`OC8051_MOV_CR : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_RN;
|
ram_wr_sel = `OC8051_RWS_RN;
|
src_sel1 = `OC8051_ASS_IMM;
|
src_sel1 = `OC8051_ASS_IMM;
|
| Line 1140... |
Line 1163... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_MOV_RD : begin
|
`OC8051_MOV_RD : begin
|
ram_rd_sel = `OC8051_RRS_RN;
|
ram_rd_sel = `OC8051_RRS_RN;
|
ram_wr_sel = `OC8051_RWS_D;
|
ram_wr_sel = `OC8051_RWS_D;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 1159... |
Line 1182... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_ORL_R : begin
|
`OC8051_ORL_R : begin
|
ram_rd_sel = `OC8051_RRS_RN;
|
ram_rd_sel = `OC8051_RRS_RN;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 1178... |
Line 1201... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_SUBB_R : begin
|
`OC8051_SUBB_R : begin
|
ram_rd_sel = `OC8051_RRS_RN;
|
ram_rd_sel = `OC8051_RRS_RN;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
| Line 1197... |
Line 1220... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_XCH_R : begin
|
`OC8051_XCH_R : begin
|
ram_rd_sel = `OC8051_RRS_RN;
|
ram_rd_sel = `OC8051_RRS_RN;
|
ram_wr_sel = `OC8051_RWS_RN;
|
ram_wr_sel = `OC8051_RWS_RN;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 1216... |
Line 1239... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_Y;
|
wad2 = `OC8051_WAD_Y;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_XRL_R : begin
|
`OC8051_XRL_R : begin
|
ram_rd_sel = `OC8051_RRS_RN;
|
ram_rd_sel = `OC8051_RRS_RN;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 1235... |
Line 1258... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
|
|
//op_code [7:1]
|
//op_code [7:1]
|
`OC8051_ADD_I : begin
|
`OC8051_ADD_I : begin
|
ram_rd_sel = `OC8051_RRS_I;
|
ram_rd_sel = `OC8051_RRS_I;
|
| Line 1256... |
Line 1279... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_ADDC_I : begin
|
`OC8051_ADDC_I : begin
|
ram_rd_sel = `OC8051_RRS_I;
|
ram_rd_sel = `OC8051_RRS_I;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
| Line 1275... |
Line 1298... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_ANL_I : begin
|
`OC8051_ANL_I : begin
|
ram_rd_sel = `OC8051_RRS_I;
|
ram_rd_sel = `OC8051_RRS_I;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
| Line 1294... |
Line 1317... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_CJNE_I : begin
|
`OC8051_CJNE_I : begin
|
ram_rd_sel = `OC8051_RRS_I;
|
ram_rd_sel = `OC8051_RRS_I;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 1313... |
Line 1336... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_DEC_I : begin
|
`OC8051_DEC_I : begin
|
ram_rd_sel = `OC8051_RRS_I;
|
ram_rd_sel = `OC8051_RRS_I;
|
ram_wr_sel = `OC8051_RWS_I;
|
ram_wr_sel = `OC8051_RWS_I;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 1332... |
Line 1355... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_INC_I : begin
|
`OC8051_INC_I : begin
|
ram_rd_sel = `OC8051_RRS_I;
|
ram_rd_sel = `OC8051_RRS_I;
|
ram_wr_sel = `OC8051_RWS_I;
|
ram_wr_sel = `OC8051_RWS_I;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 1351... |
Line 1374... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_MOV_I : begin
|
`OC8051_MOV_I : begin
|
ram_rd_sel = `OC8051_RRS_I;
|
ram_rd_sel = `OC8051_RRS_I;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 1370... |
Line 1393... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_MOV_ID : begin
|
`OC8051_MOV_ID : begin
|
ram_rd_sel = `OC8051_RRS_I;
|
ram_rd_sel = `OC8051_RRS_I;
|
ram_wr_sel = `OC8051_RWS_D;
|
ram_wr_sel = `OC8051_RWS_D;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 1389... |
Line 1412... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_MOV_AI : begin
|
`OC8051_MOV_AI : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_I;
|
ram_wr_sel = `OC8051_RWS_I;
|
src_sel1 = `OC8051_ASS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
| Line 1408... |
Line 1431... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_MOV_DI : begin
|
`OC8051_MOV_DI : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_I;
|
ram_wr_sel = `OC8051_RWS_I;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 1427... |
Line 1450... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_MOV_CI : begin
|
`OC8051_MOV_CI : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_I;
|
ram_wr_sel = `OC8051_RWS_I;
|
src_sel1 = `OC8051_ASS_IMM;
|
src_sel1 = `OC8051_ASS_IMM;
|
| Line 1446... |
Line 1469... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_MOVX_IA : begin
|
`OC8051_MOVX_IA : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_XRAM;
|
src_sel1 = `OC8051_ASS_XRAM;
|
src_sel2 = `OC8051_ASS_DC;
|
src_sel2 = `OC8051_ASS_DC;
|
alu_op = `OC8051_ALU_NOP;
|
alu_op = `OC8051_ALU_NOP;
|
wr = 1'b1;
|
wr = 1'b0;
|
psw_set = `OC8051_PS_NOT;
|
psw_set = `OC8051_PS_NOT;
|
cy_sel = `OC8051_CY_0;
|
cy_sel = `OC8051_CY_0;
|
pc_wr = `OC8051_PCW_N;
|
pc_wr = `OC8051_PCW_N;
|
pc_sel = `OC8051_PIS_DC;
|
pc_sel = `OC8051_PIS_DC;
|
imm_sel = `OC8051_IDS_OP2;
|
imm_sel = `OC8051_IDS_OP2;
|
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_RI;
|
|
end
|
end
|
`OC8051_MOVX_AI :begin
|
`OC8051_MOVX_AI :begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_DC;
|
src_sel1 = `OC8051_ASS_DC;
|
| Line 1484... |
Line 1506... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_RI;
|
|
end
|
end
|
`OC8051_ORL_I : begin
|
`OC8051_ORL_I : begin
|
ram_rd_sel = `OC8051_RRS_I;
|
ram_rd_sel = `OC8051_RRS_I;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 1503... |
Line 1524... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_SUBB_I : begin
|
`OC8051_SUBB_I : begin
|
ram_rd_sel = `OC8051_RRS_I;
|
ram_rd_sel = `OC8051_RRS_I;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
| Line 1522... |
Line 1543... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_XCH_I : begin
|
`OC8051_XCH_I : begin
|
ram_rd_sel = `OC8051_RRS_I;
|
ram_rd_sel = `OC8051_RRS_I;
|
ram_wr_sel = `OC8051_RWS_I;
|
ram_wr_sel = `OC8051_RWS_I;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 1541... |
Line 1562... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_Y;
|
wad2 = `OC8051_WAD_Y;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_XCHD :begin
|
`OC8051_XCHD :begin
|
ram_rd_sel = `OC8051_RRS_I;
|
ram_rd_sel = `OC8051_RRS_I;
|
ram_wr_sel = `OC8051_RWS_I;
|
ram_wr_sel = `OC8051_RWS_I;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 1560... |
Line 1581... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_Y;
|
wad2 = `OC8051_WAD_Y;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_XRL_I : begin
|
`OC8051_XRL_I : begin
|
ram_rd_sel = `OC8051_RRS_I;
|
ram_rd_sel = `OC8051_RRS_I;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 1579... |
Line 1600... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
|
|
//op_code [7:0]
|
//op_code [7:0]
|
`OC8051_ADD_D : begin
|
`OC8051_ADD_D : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
| Line 1600... |
Line 1621... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_ADD_C : begin
|
`OC8051_ADD_C : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_IMM;
|
src_sel1 = `OC8051_ASS_IMM;
|
| Line 1619... |
Line 1640... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_ADDC_D : begin
|
`OC8051_ADDC_D : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
| Line 1638... |
Line 1659... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_ADDC_C : begin
|
`OC8051_ADDC_C : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_IMM;
|
src_sel1 = `OC8051_ASS_IMM;
|
| Line 1657... |
Line 1678... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_ANL_D : begin
|
`OC8051_ANL_D : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
| Line 1676... |
Line 1697... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_ANL_C : begin
|
`OC8051_ANL_C : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_IMM;
|
src_sel1 = `OC8051_ASS_IMM;
|
| Line 1695... |
Line 1716... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_ANL_DD : begin
|
`OC8051_ANL_DD : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_D;
|
ram_wr_sel = `OC8051_RWS_D;
|
src_sel1 = `OC8051_ASS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
| Line 1714... |
Line 1735... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_ANL_DC : begin
|
`OC8051_ANL_DC : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_D;
|
ram_wr_sel = `OC8051_RWS_D;
|
src_sel1 = `OC8051_ASS_IMM;
|
src_sel1 = `OC8051_ASS_IMM;
|
| Line 1733... |
Line 1754... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_ANL_B : begin
|
`OC8051_ANL_B : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_DC;
|
src_sel1 = `OC8051_ASS_DC;
|
| Line 1752... |
Line 1773... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b1;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b1;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_ANL_NB : begin
|
`OC8051_ANL_NB : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_DC;
|
src_sel1 = `OC8051_ASS_DC;
|
| Line 1771... |
Line 1792... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b1;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b1;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_CJNE_D : begin
|
`OC8051_CJNE_D : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
| Line 1790... |
Line 1811... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_CJNE_C : begin
|
`OC8051_CJNE_C : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
| Line 1809... |
Line 1830... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_CLR_A : begin
|
`OC8051_CLR_A : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
| Line 1828... |
Line 1849... |
src_sel3 = `OC8051_AS3_PC;
|
src_sel3 = `OC8051_AS3_PC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_CLR_C : begin
|
`OC8051_CLR_C : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_DC;
|
src_sel1 = `OC8051_ASS_DC;
|
| Line 1847... |
Line 1868... |
src_sel3 = `OC8051_AS3_PC;
|
src_sel3 = `OC8051_AS3_PC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_CLR_B : begin
|
`OC8051_CLR_B : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_D;
|
ram_wr_sel = `OC8051_RWS_D;
|
src_sel1 = `OC8051_ASS_DC;
|
src_sel1 = `OC8051_ASS_DC;
|
| Line 1866... |
Line 1887... |
src_sel3 = `OC8051_AS3_PC;
|
src_sel3 = `OC8051_AS3_PC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b1;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b1;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_CPL_A : begin
|
`OC8051_CPL_A : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
| Line 1885... |
Line 1906... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_CPL_C : begin
|
`OC8051_CPL_C : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_DC;
|
src_sel1 = `OC8051_ASS_DC;
|
| Line 1904... |
Line 1925... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_CPL_B : begin
|
`OC8051_CPL_B : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_D;
|
ram_wr_sel = `OC8051_RWS_D;
|
src_sel1 = `OC8051_ASS_DC;
|
src_sel1 = `OC8051_ASS_DC;
|
| Line 1923... |
Line 1944... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b1;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b1;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_DA : begin
|
`OC8051_DA : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
| Line 1942... |
Line 1963... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_DEC_A : begin
|
`OC8051_DEC_A : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
| Line 1961... |
Line 1982... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_DEC_D : begin
|
`OC8051_DEC_D : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_D;
|
ram_wr_sel = `OC8051_RWS_D;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 1980... |
Line 2001... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_DIV : begin
|
`OC8051_DIV : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_B;
|
ram_wr_sel = `OC8051_RWS_B;
|
src_sel1 = `OC8051_ASS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
| Line 1999... |
Line 2020... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_DJNZ_D : begin
|
`OC8051_DJNZ_D : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_D;
|
ram_wr_sel = `OC8051_RWS_D;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 2018... |
Line 2039... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_INC_A : begin
|
`OC8051_INC_A : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
| Line 2037... |
Line 2058... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_INC_D : begin
|
`OC8051_INC_D : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_D;
|
ram_wr_sel = `OC8051_RWS_D;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 2056... |
Line 2077... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_INC_DP : begin
|
`OC8051_INC_DP : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_DPTR;
|
ram_wr_sel = `OC8051_RWS_DPTR;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 2075... |
Line 2096... |
src_sel3 = `OC8051_AS3_DP;
|
src_sel3 = `OC8051_AS3_DP;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_JB : begin
|
`OC8051_JB : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_IMM;
|
src_sel1 = `OC8051_ASS_IMM;
|
| Line 2094... |
Line 2115... |
src_sel3 = `OC8051_AS3_PC;
|
src_sel3 = `OC8051_AS3_PC;
|
comp_sel = `OC8051_CSS_BIT;
|
comp_sel = `OC8051_CSS_BIT;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b1;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b1;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_JBC :begin
|
`OC8051_JBC :begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_IMM;
|
src_sel1 = `OC8051_ASS_IMM;
|
| Line 2113... |
Line 2134... |
src_sel3 = `OC8051_AS3_PC;
|
src_sel3 = `OC8051_AS3_PC;
|
comp_sel = `OC8051_CSS_BIT;
|
comp_sel = `OC8051_CSS_BIT;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b1;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b1;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_JC : begin
|
`OC8051_JC : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_IMM;
|
src_sel1 = `OC8051_ASS_IMM;
|
| Line 2132... |
Line 2153... |
src_sel3 = `OC8051_AS3_PC;
|
src_sel3 = `OC8051_AS3_PC;
|
comp_sel = `OC8051_CSS_CY;
|
comp_sel = `OC8051_CSS_CY;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_JMP : begin
|
`OC8051_JMP : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
| Line 2151... |
Line 2172... |
src_sel3 = `OC8051_AS3_DP;
|
src_sel3 = `OC8051_AS3_DP;
|
comp_sel = `OC8051_CSS_BIT;
|
comp_sel = `OC8051_CSS_BIT;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_JNB : begin
|
`OC8051_JNB : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_IMM;
|
src_sel1 = `OC8051_ASS_IMM;
|
| Line 2170... |
Line 2191... |
src_sel3 = `OC8051_AS3_PC;
|
src_sel3 = `OC8051_AS3_PC;
|
comp_sel = `OC8051_CSS_BIT;
|
comp_sel = `OC8051_CSS_BIT;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_JNC : begin
|
`OC8051_JNC : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_IMM;
|
src_sel1 = `OC8051_ASS_IMM;
|
| Line 2189... |
Line 2210... |
src_sel3 = `OC8051_AS3_PC;
|
src_sel3 = `OC8051_AS3_PC;
|
comp_sel = `OC8051_CSS_CY;
|
comp_sel = `OC8051_CSS_CY;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_JNZ :begin
|
`OC8051_JNZ :begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_IMM;
|
src_sel1 = `OC8051_ASS_IMM;
|
| Line 2208... |
Line 2229... |
src_sel3 = `OC8051_AS3_PC;
|
src_sel3 = `OC8051_AS3_PC;
|
comp_sel = `OC8051_CSS_AZ;
|
comp_sel = `OC8051_CSS_AZ;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_JZ : begin
|
`OC8051_JZ : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_IMM;
|
src_sel1 = `OC8051_ASS_IMM;
|
| Line 2227... |
Line 2248... |
src_sel3 = `OC8051_AS3_PC;
|
src_sel3 = `OC8051_AS3_PC;
|
comp_sel = `OC8051_CSS_AZ;
|
comp_sel = `OC8051_CSS_AZ;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_LCALL :begin
|
`OC8051_LCALL :begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_SP;
|
ram_wr_sel = `OC8051_RWS_SP;
|
src_sel1 = `OC8051_ASS_IMM;
|
src_sel1 = `OC8051_ASS_IMM;
|
| Line 2246... |
Line 2267... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_LJMP : begin
|
`OC8051_LJMP : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_DC;
|
src_sel1 = `OC8051_ASS_DC;
|
| Line 2265... |
Line 2286... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_MOV_D : begin
|
`OC8051_MOV_D : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 2284... |
Line 2305... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_MOV_C : begin
|
`OC8051_MOV_C : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_IMM;
|
src_sel1 = `OC8051_ASS_IMM;
|
| Line 2303... |
Line 2324... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
|
|
`OC8051_MOV_DA : begin
|
`OC8051_MOV_DA : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_D;
|
ram_wr_sel = `OC8051_RWS_D;
|
| Line 2323... |
Line 2344... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_MOV_DD : begin
|
`OC8051_MOV_DD : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_D3;
|
ram_wr_sel = `OC8051_RWS_D3;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 2342... |
Line 2363... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_MOV_CD : begin
|
`OC8051_MOV_CD : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_D;
|
ram_wr_sel = `OC8051_RWS_D;
|
src_sel1 = `OC8051_ASS_IMM;
|
src_sel1 = `OC8051_ASS_IMM;
|
| Line 2361... |
Line 2382... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_MOV_BC : begin
|
`OC8051_MOV_BC : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_DC;
|
src_sel1 = `OC8051_ASS_DC;
|
| Line 2380... |
Line 2401... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b1;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b1;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_MOV_CB : begin
|
`OC8051_MOV_CB : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_D;
|
ram_wr_sel = `OC8051_RWS_D;
|
src_sel1 = `OC8051_ASS_DC;
|
src_sel1 = `OC8051_ASS_DC;
|
| Line 2399... |
Line 2420... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b1;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b1;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_MOV_DP : begin ///***
|
`OC8051_MOV_DP : begin ///***
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_DPTR;
|
ram_wr_sel = `OC8051_RWS_DPTR;
|
src_sel1 = `OC8051_ASS_IMM;
|
src_sel1 = `OC8051_ASS_IMM;
|
| Line 2418... |
Line 2439... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_MOVC_DP :begin
|
`OC8051_MOVC_DP :begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
| Line 2437... |
Line 2458... |
src_sel3 = `OC8051_AS3_DP;
|
src_sel3 = `OC8051_AS3_DP;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_MOVC_PC : begin
|
`OC8051_MOVC_PC : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_IMM;
|
src_sel1 = `OC8051_ASS_IMM;
|
| Line 2456... |
Line 2477... |
src_sel3 = `OC8051_AS3_PC;
|
src_sel3 = `OC8051_AS3_PC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_MOVX_PA : begin
|
`OC8051_MOVX_PA : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_XRAM;
|
src_sel1 = `OC8051_ASS_XRAM;
|
src_sel2 = `OC8051_ASS_DC;
|
src_sel2 = `OC8051_ASS_DC;
|
alu_op = `OC8051_ALU_NOP;
|
alu_op = `OC8051_ALU_NOP;
|
wr = 1'b1;
|
wr = 1'b0;
|
psw_set = `OC8051_PS_NOT;
|
psw_set = `OC8051_PS_NOT;
|
cy_sel = `OC8051_CY_0;
|
cy_sel = `OC8051_CY_0;
|
pc_wr = `OC8051_PCW_N;
|
pc_wr = `OC8051_PCW_N;
|
pc_sel = `OC8051_PIS_DC;
|
pc_sel = `OC8051_PIS_DC;
|
imm_sel = `OC8051_IDS_OP2;
|
imm_sel = `OC8051_IDS_OP2;
|
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DPTR;
|
|
end
|
end
|
`OC8051_MOVX_AP : begin
|
`OC8051_MOVX_AP : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_XRAM;
|
src_sel1 = `OC8051_ASS_XRAM;
|
| Line 2494... |
Line 2514... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DPTR;
|
|
end
|
end
|
`OC8051_MUL : begin
|
`OC8051_MUL : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_B;
|
ram_wr_sel = `OC8051_RWS_B;
|
src_sel1 = `OC8051_ASS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
| Line 2513... |
Line 2532... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_ORL_D : begin
|
`OC8051_ORL_D : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 2532... |
Line 2551... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_ORL_C : begin
|
`OC8051_ORL_C : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_IMM;
|
src_sel1 = `OC8051_ASS_IMM;
|
| Line 2551... |
Line 2570... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_ORL_AD : begin
|
`OC8051_ORL_AD : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_D;
|
ram_wr_sel = `OC8051_RWS_D;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 2570... |
Line 2589... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_ORL_CD : begin
|
`OC8051_ORL_CD : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_D;
|
ram_wr_sel = `OC8051_RWS_D;
|
src_sel1 = `OC8051_ASS_IMM;
|
src_sel1 = `OC8051_ASS_IMM;
|
| Line 2589... |
Line 2608... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_ORL_B : begin
|
`OC8051_ORL_B : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_DC;
|
src_sel1 = `OC8051_ASS_DC;
|
| Line 2608... |
Line 2627... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b1;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b1;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_ORL_NB : begin
|
`OC8051_ORL_NB : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_DC;
|
src_sel1 = `OC8051_ASS_DC;
|
| Line 2627... |
Line 2646... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b1;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b1;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_POP : begin
|
`OC8051_POP : begin
|
ram_rd_sel = `OC8051_RRS_SP;
|
ram_rd_sel = `OC8051_RRS_SP;
|
ram_wr_sel = `OC8051_RWS_D;
|
ram_wr_sel = `OC8051_RWS_D;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 2646... |
Line 2665... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_PUSH : begin
|
`OC8051_PUSH : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_SP;
|
ram_wr_sel = `OC8051_RWS_SP;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 2665... |
Line 2684... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_RET : begin
|
`OC8051_RET : begin
|
ram_rd_sel = `OC8051_RRS_SP;
|
ram_rd_sel = `OC8051_RRS_SP;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 2684... |
Line 2703... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_RETI : begin
|
`OC8051_RETI : begin
|
ram_rd_sel = `OC8051_RRS_SP;
|
ram_rd_sel = `OC8051_RRS_SP;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 2703... |
Line 2722... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_RL : begin
|
`OC8051_RL : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
| Line 2722... |
Line 2741... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_RLC : begin
|
`OC8051_RLC : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
| Line 2741... |
Line 2760... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_RR : begin
|
`OC8051_RR : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
| Line 2760... |
Line 2779... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_RRC : begin
|
`OC8051_RRC : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
| Line 2779... |
Line 2798... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_SETB_C : begin
|
`OC8051_SETB_C : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_DC;
|
src_sel1 = `OC8051_ASS_DC;
|
| Line 2798... |
Line 2817... |
src_sel3 = `OC8051_AS3_PC;
|
src_sel3 = `OC8051_AS3_PC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_SETB_B : begin
|
`OC8051_SETB_B : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_D;
|
ram_wr_sel = `OC8051_RWS_D;
|
src_sel1 = `OC8051_ASS_DC;
|
src_sel1 = `OC8051_ASS_DC;
|
| Line 2817... |
Line 2836... |
src_sel3 = `OC8051_AS3_PC;
|
src_sel3 = `OC8051_AS3_PC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b1;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b1;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_SJMP : begin
|
`OC8051_SJMP : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_IMM;
|
src_sel1 = `OC8051_ASS_IMM;
|
| Line 2836... |
Line 2855... |
src_sel3 = `OC8051_AS3_PC;
|
src_sel3 = `OC8051_AS3_PC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_SUBB_D : begin
|
`OC8051_SUBB_D : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
| Line 2855... |
Line 2874... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_SUBB_C : begin
|
`OC8051_SUBB_C : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
| Line 2874... |
Line 2893... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_SWAP : begin
|
`OC8051_SWAP : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_ACC;
|
src_sel1 = `OC8051_ASS_ACC;
|
| Line 2893... |
Line 2912... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_Y;
|
wad2 = `OC8051_WAD_Y;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_XCH_D : begin
|
`OC8051_XCH_D : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_D;
|
ram_wr_sel = `OC8051_RWS_D;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 2912... |
Line 2931... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_Y;
|
wad2 = `OC8051_WAD_Y;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_XRL_D : begin
|
`OC8051_XRL_D : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 2931... |
Line 2950... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_XRL_C : begin
|
`OC8051_XRL_C : begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
ram_wr_sel = `OC8051_RWS_ACC;
|
src_sel1 = `OC8051_ASS_IMM;
|
src_sel1 = `OC8051_ASS_IMM;
|
| Line 2950... |
Line 2969... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_XRL_AD : begin
|
`OC8051_XRL_AD : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_D;
|
ram_wr_sel = `OC8051_RWS_D;
|
src_sel1 = `OC8051_ASS_RAM;
|
src_sel1 = `OC8051_ASS_RAM;
|
| Line 2969... |
Line 2988... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
`OC8051_XRL_CD : begin
|
`OC8051_XRL_CD : begin
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_rd_sel = `OC8051_RRS_D;
|
ram_wr_sel = `OC8051_RWS_D;
|
ram_wr_sel = `OC8051_RWS_D;
|
src_sel1 = `OC8051_ASS_IMM;
|
src_sel1 = `OC8051_ASS_IMM;
|
| Line 2988... |
Line 3007... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_Y; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
default: begin
|
default: begin
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_rd_sel = `OC8051_RRS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
ram_wr_sel = `OC8051_RWS_DC;
|
src_sel1 = `OC8051_ASS_DC;
|
src_sel1 = `OC8051_ASS_DC;
|
| Line 3007... |
Line 3026... |
src_sel3 = `OC8051_AS3_DC;
|
src_sel3 = `OC8051_AS3_DC;
|
comp_sel = `OC8051_CSS_DC;
|
comp_sel = `OC8051_CSS_DC;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
rmw = `OC8051_RMW_N; bit_addr = 1'b0;
|
wad2 = `OC8051_WAD_N;
|
wad2 = `OC8051_WAD_N;
|
rom_addr_sel = `OC8051_RAS_PC;
|
rom_addr_sel = `OC8051_RAS_PC;
|
ext_addr_sel = `OC8051_EAS_DC;
|
|
end
|
end
|
|
|
endcase
|
endcase
|
end
|
end
|
endcase
|
endcase
|
end
|
end
|
|
end
|
|
|
//
|
//
|
// remember current instruction
|
// remember current instruction
|
always @(posedge clk or posedge rst)
|
always @(posedge clk or posedge rst)
|
if (rst) op <= #1 2'b00;
|
if (rst) op <= #1 2'b00;
|
| Line 3067... |
Line 3087... |
end
|
end
|
end
|
end
|
|
|
//
|
//
|
//in case of reti
|
//in case of reti
|
always @(posedge clk)
|
always @(posedge clk or posedge rst)
|
if (op==`OC8051_RETI) reti <= #1 1'b1;
|
if (rst) reti <= #1 1'b0;
|
|
else if (op==`OC8051_RETI) reti <= #1 1'b1;
|
else reti <= #1 1'b0;
|
else reti <= #1 1'b0;
|
|
|
//
|
//
|
//in case of writing to external ram
|
//in case of writing to external ram
|
always @(op_in or rst or rd)
|
always @(op_in or rd)
|
begin
|
begin
|
if (rst)
|
if (rd)
|
|
begin
|
|
casex (op_in)
|
|
`OC8051_MOVX_AI : begin
|
|
stb = 1'b0;
|
|
write_x = 1'b1;
|
|
end
|
|
`OC8051_MOVX_AP : begin
|
|
stb = 1'b0;
|
|
write_x = 1'b1;
|
|
end
|
|
`OC8051_MOVX_IA : begin
|
|
stb = 1'b1;
|
|
write_x = 1'b0;
|
|
end
|
|
`OC8051_MOVX_PA : begin
|
|
stb = 1'b1;
|
|
write_x = 1'b0;
|
|
end
|
|
default : begin
|
|
stb = 1'b0;
|
|
write_x = 1'b0;
|
|
end
|
|
endcase
|
|
end else begin
|
write_x = 1'b0;
|
write_x = 1'b0;
|
else if (rd)
|
stb =1'b0;
|
|
end
|
|
end
|
|
|
|
always @(op_in)
|
begin
|
begin
|
casex (op_in)
|
casex (op_in)
|
`OC8051_MOVX_AI : write_x = 1'b1;
|
`OC8051_MOVX_AI : begin
|
`OC8051_MOVX_AP : write_x = 1'b1;
|
ext_addr_sel = `OC8051_EAS_RI;
|
default : write_x = 1'b0;
|
wr_xaddr = 1'b1;
|
|
end
|
|
`OC8051_MOVX_AP : begin
|
|
ext_addr_sel = `OC8051_EAS_DPTR;
|
|
wr_xaddr = 1'b1;
|
|
end
|
|
`OC8051_MOVX_IA : begin
|
|
ext_addr_sel = `OC8051_EAS_RI;
|
|
wr_xaddr = 1'b1;
|
|
end
|
|
`OC8051_MOVX_PA : begin
|
|
ext_addr_sel = `OC8051_EAS_DPTR;
|
|
wr_xaddr = 1'b1;
|
|
end
|
|
default: begin
|
|
wr_xaddr = 1'b0;
|
|
ext_addr_sel = `OC8051_EAS_DPTR;
|
|
end
|
endcase
|
endcase
|
end else write_x = 1'b0;
|
end
|
|
|
|
|
|
|
|
always @(posedge clk or posedge rst)
|
|
begin
|
|
if (rst) begin
|
|
stbw <= #1 1'b0;
|
|
end else
|
|
stbw <= #1 write_x;
|
|
end
|
|
|
|
|
|
always @(posedge clk or posedge rst)
|
|
begin
|
|
if (rst) begin
|
|
stb_buff <= #1 1'b0;
|
|
we_buff <= #1 1'b0;
|
|
end else if (ack_i) begin
|
|
stb_buff <= #1 1'b0;
|
|
we_buff <= #1 1'b0;
|
|
end else if (stb || stbw) begin
|
|
stb_buff <= #1 1'b1;
|
|
end else if (write_x) begin
|
|
we_buff <= #1 1'b1;
|
|
end
|
end
|
end
|
|
|
|
|
endmodule
|
endmodule
|
|
|
