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[FAST486]

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In FPREM and FPREM1, copy the lowest 3 bits of the quotient
into C1, C3 and C0 (in that order!).


svn path=/trunk/; revision=68399
This commit is contained in:
Aleksandar Andrejevic 2015-07-14 23:15:46 +00:00
parent d9f3b5c508
commit 33cbfd3217
1 changed files with 22 additions and 4 deletions
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26
reactos/lib/fast486/fpu.c
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@ -2419,6 +2419,8 @@ FAST486_OPCODE_HANDLER(Fast486FpuOpcodeD9)
/* FPREM1 */ /* FPREM1 */
case 0x35: case 0x35:
{ {
LONGLONG Quotient;
Fast486FpuExceptionCheck(State); Fast486FpuExceptionCheck(State);
FPU_SAVE_LAST_INST(); FPU_SAVE_LAST_INST();
@ -2428,8 +2430,15 @@ FAST486_OPCODE_HANDLER(Fast486FpuOpcodeD9)
break; break;
} }
Fast486FpuRemainder(State, &FPU_ST(0), &FPU_ST(1), TRUE, &FPU_ST(0), NULL); if (Fast486FpuRemainder(State, &FPU_ST(0), &FPU_ST(1), TRUE, &FPU_ST(0), &Quotient))
FPU_UPDATE_TAG(0); {
FPU_UPDATE_TAG(0);
/* Return the lowest 3 bits of the quotient in C1, C3, C0 */
State->FpuStatus.Code1 = Quotient & 1;
State->FpuStatus.Code3 = (Quotient >> 1) & 1;
State->FpuStatus.Code0 = (Quotient >> 2) & 1;
}
break; break;
} }
@ -2451,6 +2460,8 @@ FAST486_OPCODE_HANDLER(Fast486FpuOpcodeD9)
/* FPREM */ /* FPREM */
case 0x38: case 0x38:
{ {
LONGLONG Quotient;
Fast486FpuExceptionCheck(State); Fast486FpuExceptionCheck(State);
FPU_SAVE_LAST_INST(); FPU_SAVE_LAST_INST();
@ -2460,8 +2471,15 @@ FAST486_OPCODE_HANDLER(Fast486FpuOpcodeD9)
break; break;
} }
Fast486FpuRemainder(State, &FPU_ST(0), &FPU_ST(1), FALSE, &FPU_ST(0), NULL); if (Fast486FpuRemainder(State, &FPU_ST(0), &FPU_ST(1), FALSE, &FPU_ST(0), &Quotient))
FPU_UPDATE_TAG(0); {
FPU_UPDATE_TAG(0);
/* Return the lowest 3 bits of the quotient in C1, C3, C0 */
State->FpuStatus.Code1 = Quotient & 1;
State->FpuStatus.Code3 = (Quotient >> 1) & 1;
State->FpuStatus.Code0 = (Quotient >> 2) & 1;
}
break; break;
} }