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[/] [ao486/] [trunk/] [rtl/] [ao486/] [commands/] [CMD_Jcc.txt] - Rev 2

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<defines>
`define CMD_Jcc         #AUTOGEN_NEXT_CMD
</defines>

<decode>
(dec_ready_one_one && decoder[7:4] == 4'h7) || (dec_ready_2byte_imm && decoder[7:4] == 4'h8)
`CMD_Jcc
IF(~(dec_prefix_2byte)); SET(dec_is_8bit); ENDIF();
IF(dec_prefix_2byte); SET(consume_one_imm); ELSE(); SET(consume_one_one); ENDIF();
</decode>

<execute>
IF(exe_cmd == `CMD_Jcc);
    IF(exe_mutex_current[`MUTEX_EFLAGS_BIT]); SET(exe_waiting);
    ELSE();
        IF(exe_condition && exe_branch_eip > cs_limit); 
            SET(exe_waiting);
            SET(exe_trigger_gp_fault); //exception GP(0)
        ENDIF();
        
        SET(exe_branch,         exe_condition);
        SET(exe_result_signals, { 4'd0, exe_condition });
    ENDIF();
ENDIF();
</execute>

<write>
IF(wr_cmd == `CMD_Jcc);
    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();
</write>

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