Subversion Repositories ao486

`define CMD_debug_reg       #AUTOGEN_NEXT_CMD

`define CMDEX_debug_reg_MOV_store_STEP_0    4'd0

`define CMDEX_debug_reg_MOV_load_STEP_0     4'd1

`define CMDEX_debug_reg_MOV_load_STEP_1     4'd2

dec_ready_2byte_modregrm && { decoder[7:2], 1'b0, decoder[0] } == 8'h21

`CMD_debug_reg

IF(decoder[1]); SET(dec_cmdex, `CMDEX_debug_reg_MOV_load_STEP_0); ELSE(); SET(dec_cmdex, `CMDEX_debug_reg_MOV_store_STEP_0); ENDIF();

SET(consume_modregrm_one);

IF(decoder[1]); SET(dec_is_complex); ENDIF();

`CMDEX_debug_reg_MOV_load_STEP_0

LOOP(`CMDEX_debug_reg_MOV_load_STEP_1);

IF(rd_cmd == `CMD_debug_reg && rd_cmdex == `CMDEX_debug_reg_MOV_store_STEP_0);

    SET(rd_dst_is_rm);

    SET(rd_req_rm);

    // wait for prev step; not to set dr7.GD before

    IF(rd_mutex_busy_active); SET(rd_waiting); ENDIF();

ENDIF();

IF(rd_cmd == `CMD_debug_reg && rd_cmdex == `CMDEX_debug_reg_MOV_load_STEP_0);

    SET(rd_src_is_rm);

    // wait for prev step; not to set dr7.GD before // no req required

    IF(rd_mutex_busy_active); SET(rd_waiting); ENDIF();

ENDIF();

IF(exe_cmd == `CMD_debug_reg && (exe_cmdex == `CMDEX_debug_reg_MOV_store_STEP_0 || exe_cmdex == `CMDEX_debug_reg_MOV_load_STEP_0));

    IF(exe_cmdex == `CMDEX_debug_reg_MOV_load_STEP_0);

        SET(exe_result2, src);

    ENDIF();

    IF(exe_cmdex == `CMDEX_debug_reg_MOV_store_STEP_0 && exe_modregrm_reg == 3'd0); SET(exe_result, dr0); ENDIF();

    IF(exe_cmdex == `CMDEX_debug_reg_MOV_store_STEP_0 && exe_modregrm_reg == 3'd1); SET(exe_result, dr1); ENDIF();

    IF(exe_cmdex == `CMDEX_debug_reg_MOV_store_STEP_0 && exe_modregrm_reg == 3'd2); SET(exe_result, dr2); ENDIF();

    IF(exe_cmdex == `CMDEX_debug_reg_MOV_store_STEP_0 && exe_modregrm_reg == 3'd3); SET(exe_result, dr3); ENDIF();

    IF(exe_cmdex == `CMDEX_debug_reg_MOV_store_STEP_0 && (exe_modregrm_reg == 3'd4 || exe_modregrm_reg == 3'd6));

        SET(exe_result, { 16'hFFFF, dr6_bt, dr6_bs, dr6_bd, dr6_b12, 8'hFF, dr6_breakpoints });

    ENDIF();

    IF(exe_cmdex == `CMDEX_debug_reg_MOV_store_STEP_0 && (exe_modregrm_reg == 3'd5 || exe_modregrm_reg == 3'd7));

        SET(exe_result, dr7);

    ENDIF();

    IF(dr7[`DR7_BIT_GD]);

        SET(dr6_bd_set, `TRUE);

        SET(exe_waiting);

        SET(exe_trigger_db_fault); //exception DB(0)

    ELSE();

        IF(cpl > 2'd0);

            SET(exe_waiting);

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

        ENDIF();

    ENDIF();

ENDIF();

IF(wr_cmd == `CMD_debug_reg && wr_cmdex == `CMDEX_debug_reg_MOV_store_STEP_0);

    SET(wr_regrm_dword);

    SET(write_regrm);

ENDIF();

IF(wr_cmd == `CMD_debug_reg && wr_cmdex == `CMDEX_debug_reg_MOV_load_STEP_0);

    SET(wr_not_finished);

    IF(wr_decoder[13:11] == 3'd0); SAVE(dr0, result2); ENDIF();

    IF(wr_decoder[13:11] == 3'd1); SAVE(dr1, result2); ENDIF();

    IF(wr_decoder[13:11] == 3'd2); SAVE(dr2, result2); ENDIF();

    IF(wr_decoder[13:11] == 3'd3); SAVE(dr3, result2); ENDIF();

    IF((wr_decoder[13:11] == 3'd4 || wr_decoder[13:11] == 3'd6));

        SAVE(dr6_breakpoints, result2[3:0]);

        SAVE(dr6_b12,    result2[12]);

        SAVE(dr6_bd,     result2[13]);

        SAVE(dr6_bs,     result2[14]);

        SAVE(dr6_bt,     result2[15]);

    ENDIF();

    IF((wr_decoder[13:11] == 3'd5 || wr_decoder[13:11] == 3'd7));

        SAVE(dr7,    result2 | 32'h00000400);

    ENDIF();

ENDIF();

IF(wr_cmd == `CMD_debug_reg && wr_cmdex == `CMDEX_debug_reg_MOV_load_STEP_1);

    // reset pipeline

    SET(wr_req_reset_micro);

    SET(wr_req_reset_rd);

    SET(wr_req_reset_exe);

ENDIF();