?? fp2.s
字號:
/ fp2 -- floating point simulationi.ldx: mov (r3)+,(r2)+ mov (r3)+,(r2)+ bit $m.ext,fpsr beq 1f mov (r3)+,(r2)+ mov (r3)+,(r2)+ rts pc1: clr (r2)+ clr (r2)+ rts pci.stx: mov (r2)+,(r3)+ mov (r2)+,(r3)+ bit $m.ext,fpsr beq 1f mov (r2)+,(r3)+ mov (r2)+,(r3)+1: jmp ret / does not set cc'si.clrx: clr (r3)+ clr (r3)+ bit $m.ext,fpsr beq 1f clr (r3)+ clr (r3)+1: rts pci.negx: tst (r3) beq 1f add $100000,(r3)1: rts pci.absx: bic $!77777,(r3) rts pci.tstx: rts pci.cmpx: mov $areg,r5 tst (r2) bge 1f tst (r3) bge 1f cmp (r2),(r3) bgt 4f blt 3f1: cmp (r2)+,(r3)+ bgt 3f blt 4f cmp (r2)+,(r3)+ bne 1f bit $m.ext,fpsr beq 2f cmp (r2)+,(r3)+ bne 1f cmp (r2)+,(r3)+ beq 2f1: bhi 3f4: movb $1,1(r5) rts pc3: mov $-1,(r5) rts pc2: clr (r5) rts pci.ldcyx: mov (r3)+,(r2)+ mov (r3)+,(r2)+ bit $m.ext,fpsr bne 1f mov (r3)+,(r2)+ mov (r3)+,(r2)+ rts pc1: clr (r2)+ clr (r2)+ rts pci.stcxy: mov (r2)+,(r3)+ mov (r2)+,(r3)+ bit $m.ext,fpsr bne 1f clr (r3)+ clr (r3)+1: rts pci.ldcjx: mov $asign,r0 mov $1,(r0)+ mov (r3)+,(r0)+ bit $m.lngi,fpsr beq 1f mov (r3)+,(r0)+ clr (r0)+ clr (r0)+ mov $32.-8,(r0)+ jmp saret1: clr (r0)+ clr (r0)+ clr (r0)+ mov $16.-8,(r0) jmp sareti.stcxj: mov r3,r5 mov $asign,r0 jsr pc,seta clr r4 mov $areg,r0 mov (r0)+,r1 mov (r0)+,r2 mov (r0)+,r3 mov aexp,r01: cmp r0,$48.-8 bge 1f clc ror r1 ror r2 ror r3 inc r0 br 1b1: bgt 7f tst r1 beq 1f7: bis $1,r4 / C-bit1: bit $m.lngi,fpsr beq 1f tst asign bge 2f neg r3 adc r2 bcs 2f neg r2 bis $10,r4 / N-bit2: mov r2,(r5) mov r3,2(r5) bis r2,r3 br 8f1: tst r2 beq 1f bis $1,r4 / C-bit1: tst asign bge 2f neg r3 bis $10,r4 / N-bit2: mov r3,(r5)8: bne 1f bis $4,r4 / Z-bit1: bic $17,sps bic $17,fpsr bis r4,sps bis r4,fpsr jmp retxoflo: bis $1,fpsr / set fixed overflow (carry) jmp reti.ldexp: mov $asign,r0 jsr pc,seta mov (r3),aexp jsr pc,reta jmp sreti.stexp: mov $asign,r0 jsr pc,seta mov aexp,(r3) mov r3,r5 bic $17,sps tst (r3) bmi 1f bne 2f bis $4,sps / Z-bit br 2f1: bis $10,sps / N-bit2: jmp sreti.ldfps: mov (r3),fpsr jmp reti.stfps: mov fpsr,(r3) jmp ret
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