Subversion Repositories ao486

`define CMD_LOOP        #AUTOGEN_NEXT_CMD

`define CMDEX_LOOP_NE               4'd0

`define CMDEX_LOOP_E                4'd1

`define CMDEX_LOOP                  4'd2

dec_ready_one_one && (decoder[7:0] == 8'hE0 || decoder[7:0] == 8'hE1 || decoder[7:0] == 8'hE2)

`CMD_LOOP

SET(dec_cmdex,

    (decoder[1:0] == 2'b00)? `CMDEX_LOOP_NE :

    (decoder[1:0] == 2'b01)? `CMDEX_LOOP_E :

                             `CMDEX_LOOP);

SET(dec_is_8bit);

SET(consume_one_one);

wire exe_cmd_loop_ecx;

wire exe_cmd_loop_condition;

assign exe_cmd_loop_ecx = (exe_address_16bit)? ecx[15:0] != 16'd1 : ecx != 32'd1;

assign exe_cmd_loop_condition =

    (exe_cmdex == `CMDEX_LOOP_NE)?  exe_cmd_loop_ecx && zflag == `FALSE :

    (exe_cmdex == `CMDEX_LOOP_E)?   exe_cmd_loop_ecx && zflag == `TRUE :

                                    exe_cmd_loop_ecx;

IF(rd_cmd == `CMD_LOOP);

    SET(rd_req_ecx);

ENDIF();

IF(exe_cmd == `CMD_LOOP);

    IF(exe_mutex_current[`MUTEX_ECX_BIT] || (exe_mutex_current[`MUTEX_EFLAGS_BIT] && (exe_cmdex == `CMDEX_LOOP_NE || exe_cmdex == `CMDEX_LOOP_E))); SET(exe_waiting);

    ELSE();

        IF(exe_cmd_loop_condition && exe_branch_eip > cs_limit);

            SET(exe_waiting);

            SET(exe_trigger_gp_fault); //exception GP(0)

        ENDIF();

        SET(exe_branch,         exe_cmd_loop_condition);

        SET(exe_result_signals, { 4'd0, exe_cmd_loop_condition });

    ENDIF();

ENDIF();

wire [31:0] wr_ecx_minus_1;

assign wr_ecx_minus_1 = ecx - 32'd1;

IF(wr_cmd == `CMD_LOOP);

    IF(wr_address_16bit);   SAVE(ecx, { ecx[31:16], wr_ecx_minus_1[15:0] });

    ELSE();                 SAVE(ecx, wr_ecx_minus_1);

    ENDIF();

    IF(result_signals[0]);

        // clear pipeline

        SET(wr_req_reset_pr);

        SET(wr_req_reset_dec);

        SET(wr_req_reset_micro);

        SET(wr_req_reset_rd);

        SET(wr_req_reset_exe);

    ENDIF();

ENDIF();