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[/] [ao486/] [trunk/] [rtl/] [ao486/] [commands/] [CMD_fpu.txt] - Rev 2
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<defines>
`define CMD_fpu #AUTOGEN_NEXT_CMD
`define CMDEX_WAIT_STEP_0 4'd0
`define CMDEX_ESC_STEP_0 4'd1
</defines>
<decode>
dec_ready_one && decoder[7:0] == 8'h9B
`CMD_fpu
SET(dec_cmdex, `CMDEX_WAIT_STEP_0);
SET(consume_one);
</decode>
<decode>
dec_ready_modregrm_one && { decoder[7:3], 3'b0 } == 8'hD8
`CMD_fpu
SET(dec_cmdex, `CMDEX_ESC_STEP_0);
SET(consume_modregrm_one);
</decode>
<execute>
IF(exe_cmd == `CMD_fpu && exe_cmdex == `CMDEX_ESC_STEP_0);
IF(cr0_em || cr0_ts);
SET(exe_waiting);
SET(exe_trigger_nm_fault); //exception NM(0)
ENDIF();
ENDIF();
</execute>