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[/] [ao486/] [trunk/] [rtl/] [ao486/] [commands/] [CMD_STOS.txt] - Blame information for rev 2

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Line No. Rev Author Line
1 2 alfik
 
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`define CMD_STOS        #AUTOGEN_NEXT_CMD
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`define CMDEX_STOS_STEP_0       4'd0
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dec_ready_one && { decoder[7:1], 1'b0 } == 8'hAA
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`CMD_STOS
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SET(dec_cmdex, `CMDEX_STOS_STEP_0);
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IF(decoder[0] == 1'b0); SET(dec_is_8bit); ENDIF();
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SET(consume_one);
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IF(dec_prefix_group_1_rep != 2'd0); SET(dec_is_complex); ENDIF();
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//complex instruction only if: dec_prefix_group_1 != 2'd0
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LOOP(`CMDEX_STOS_STEP_0);
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IF(rd_cmd == `CMD_STOS);
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    IF(rd_mutex_busy_eax || (rd_mutex_busy_ecx && rd_prefix_group_1_rep != 2'd0)); SET(rd_waiting); //waiting for ecx for rd_string_ignore
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    ELSE();
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        IF(~(rd_string_ignore));
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            SET(rd_src_is_eax);
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            SET(rd_req_memory);
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            SET(rd_req_edi);
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            //not needed -- reset after finish //IF(rd_prefix_group_1_rep != 2'd0); SET(rd_req_ecx); ENDIF();
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        ENDIF();
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    ENDIF();
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ENDIF();
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IF(exe_cmd == `CMD_STOS);
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    SET(exe_result_push, src);
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ENDIF();
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IF(wr_cmd == `CMD_STOS);
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    SET(wr_string_gp_fault_check);
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    IF(~(wr_string_ignore));
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        SET(wr_one_cycle_wait);
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        IF(~(wr_string_es_fault));
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            SET(write_string_es_virtual);
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        ENDIF();
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        IF(~(write_for_wr_ready)); SET(wr_waiting);
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        ELSE();
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            SAVE(edi, wr_edi_final);
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            IF(wr_prefix_group_1_rep != 2'd0); SAVE(ecx, wr_ecx_final); ENDIF();
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            IF(wr_string_finish);
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                SET(wr_req_reset_micro);
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                SET(wr_req_reset_rd);
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                SET(wr_req_reset_exe);
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            ELSE();
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                IF(wr_prefix_group_1_rep != 2'd0);
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                    SET(wr_not_finished);
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                    SET(wr_string_in_progress);
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                ENDIF();
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            ENDIF();
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        ENDIF();
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    ENDIF();
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    IF(wr_string_ignore);
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        SET(wr_req_reset_micro);
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        SET(wr_req_reset_rd);
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        SET(wr_req_reset_exe);
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    ENDIF();
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ENDIF();
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