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[/] [ao486/] [trunk/] [rtl/] [ao486/] [commands/] [CMD_POPF.txt] - Rev 8
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<defines>
`define CMD_POPF #AUTOGEN_NEXT_CMD
`define CMDEX_POPF_STEP_0 4'd0
`define CMDEX_POPF_STEP_1 4'd1
</defines>
<decode>
dec_ready_one && decoder[7:0] == 8'h9D
`CMD_POPF
SET(dec_cmdex, `CMDEX_POPF_STEP_0);
SET(consume_one);
SET(dec_is_complex);
</decode>
<microcode>
`CMDEX_POPF_STEP_0
LOOP(`CMDEX_POPF_STEP_1);
</microcode>
<read>
IF(rd_cmd == `CMD_POPF && rd_cmdex == `CMDEX_POPF_STEP_0);
SET(address_stack_pop);
// waiting for esp in 'address_ready'
SET(rd_src_is_memory);
SET(rd_req_esp);
SET(rd_req_eflags);
IF(rd_mutex_busy_memory); SET(rd_waiting);
ELSE();
SET(read_virtual);
IF(~(read_for_rd_ready)); SET(rd_waiting); ENDIF();
ENDIF();
ENDIF();
</read>
<execute>
IF(exe_cmd == `CMD_POPF && exe_cmdex == `CMDEX_POPF_STEP_0);
SET(offset_pop);
SET(exe_result2, src);
IF(exe_mutex_current[`MUTEX_EFLAGS_BIT]); SET(exe_waiting);
ELSE();
IF(v8086_mode && iopl < 2'd3);
SET(exe_waiting);
SET(exe_trigger_gp_fault); //exception GP(0)
ENDIF();
ENDIF();
ENDIF();
</execute>
<write>
IF(wr_cmd == `CMD_POPF && wr_cmdex == `CMDEX_POPF_STEP_0);
SAVE(cflag, result2[0]);
SAVE(pflag, result2[2]);
SAVE(aflag, result2[4]);
SAVE(zflag, result2[6]);
SAVE(sflag, result2[7]);
SAVE(tflag, result2[8]);
SAVE(dflag, result2[10]);
SAVE(oflag, result2[11]);
SAVE(ntflag, result2[14]);
IF(wr_operand_32bit);
SAVE(rflag, result2[16]);
SAVE(acflag, result2[18]);
SAVE(idflag, result2[21]);
ENDIF();
IF((protected_mode && cpl == 2'd0) || real_mode);
SAVE(iopl, result2[13:12]);
ENDIF();
IF((protected_mode && cpl <= iopl) || v8086_mode || real_mode);
SAVE(iflag, result2[9]);
ENDIF();
//vmflag set not possible
SAVE(esp, wr_stack_esp);
// clear pipeline
SET(wr_req_reset_micro);
SET(wr_req_reset_rd);
SET(wr_req_reset_exe);
ENDIF();
</write>
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