mirror of
https://github.com/reactos/reactos.git
synced 2025-04-22 13:10:39 +00:00
[FAST486]
Fix several serious bugs in Fast486FpuToInteger. Halfplement opcode 0xDD (everything except FRSTOR and FSAVE). Cleanup the code a little bit. svn path=/trunk/; revision=65935
This commit is contained in:
Aleksandar Andrejevic
parent
cc0c2313c3
commit
19116d3a60
2 changed files with 344 additions and 188 deletions
|
|
@ -66,7 +66,7 @@ UnsignedMult128(ULONGLONG Multiplicand,
|
|||
return LowProduct;
|
||||
}
|
||||
|
||||
static VOID
|
||||
static inline VOID FASTCALL
|
||||
Fast486FpuFromInteger(PFAST486_STATE State,
|
||||
LONGLONG Value,
|
||||
PFAST486_FPU_DATA_REG Result)
|
||||
|
|
@ -89,7 +89,7 @@ Fast486FpuFromInteger(PFAST486_STATE State,
|
|||
Result->Exponent = FPU_REAL10_BIAS + 63 - ZeroCount;
|
||||
}
|
||||
|
||||
static BOOLEAN
|
||||
static inline BOOLEAN FASTCALL
|
||||
Fast486FpuToInteger(PFAST486_STATE State,
|
||||
PFAST486_FPU_DATA_REG Value,
|
||||
PLONGLONG Result)
|
||||
|
|
@ -100,7 +100,7 @@ Fast486FpuToInteger(PFAST486_STATE State,
|
|||
|
||||
if (FPU_IS_ZERO(Value))
|
||||
{
|
||||
Result = 0LL;
|
||||
*Result = 0LL;
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
|
|
@ -127,7 +127,7 @@ Fast486FpuToInteger(PFAST486_STATE State,
|
|||
/* Check if the highest bit of the remainder is set */
|
||||
if (Remainder & (1 << (Bits - 1)))
|
||||
{
|
||||
*Result++;
|
||||
(*Result)++;
|
||||
|
||||
/* Check if all the other bits are clear */
|
||||
if (!(Remainder & ((1 << (Bits - 1)) - 1)))
|
||||
|
|
@ -142,13 +142,13 @@ Fast486FpuToInteger(PFAST486_STATE State,
|
|||
|
||||
case FPU_ROUND_DOWN:
|
||||
{
|
||||
if ((Remainder != 0ULL) && Value->Sign) *Result++;
|
||||
if ((Remainder != 0ULL) && Value->Sign) (*Result)++;
|
||||
break;
|
||||
}
|
||||
|
||||
case FPU_ROUND_UP:
|
||||
{
|
||||
if ((Remainder != 0ULL) && !Value->Sign) *Result++;
|
||||
if ((Remainder != 0ULL) && !Value->Sign) (*Result)++;
|
||||
break;
|
||||
}
|
||||
|
||||
|
|
@ -162,7 +162,7 @@ Fast486FpuToInteger(PFAST486_STATE State,
|
|||
return TRUE;
|
||||
}
|
||||
|
||||
static VOID
|
||||
static inline VOID FASTCALL
|
||||
Fast486FpuFromSingleReal(PFAST486_STATE State,
|
||||
ULONG Value,
|
||||
PFAST486_FPU_DATA_REG Result)
|
||||
|
|
@ -183,7 +183,7 @@ Fast486FpuFromSingleReal(PFAST486_STATE State,
|
|||
}
|
||||
}
|
||||
|
||||
static VOID
|
||||
static inline VOID FASTCALL
|
||||
Fast486FpuFromDoubleReal(PFAST486_STATE State,
|
||||
ULONGLONG Value,
|
||||
PFAST486_FPU_DATA_REG Result)
|
||||
|
|
@ -204,7 +204,94 @@ Fast486FpuFromDoubleReal(PFAST486_STATE State,
|
|||
}
|
||||
}
|
||||
|
||||
static VOID
|
||||
static inline BOOLEAN FASTCALL
|
||||
Fast486FpuToDoubleReal(PFAST486_STATE State,
|
||||
PFAST486_FPU_DATA_REG Value,
|
||||
PULONGLONG Result)
|
||||
{
|
||||
ULONGLONG Remainder;
|
||||
SHORT UnbiasedExp = (SHORT)Value->Exponent - FPU_REAL10_BIAS;
|
||||
|
||||
if (FPU_IS_ZERO(Value))
|
||||
{
|
||||
*Result = 0LL;
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
/* Calculate the mantissa */
|
||||
*Result = (Value->Mantissa >> 11) & ((1ULL << 52) - 1);
|
||||
|
||||
if (FPU_IS_NAN(Value))
|
||||
{
|
||||
*Result |= 0x3FF0000000000000ULL;
|
||||
goto SetSign;
|
||||
}
|
||||
|
||||
/* Check for underflow */
|
||||
if (!FPU_IS_NORMALIZED(Value) || (UnbiasedExp < -1023))
|
||||
{
|
||||
State->FpuStatus.Ue = TRUE;
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
/* Check for overflow */
|
||||
if (UnbiasedExp > 1023)
|
||||
{
|
||||
State->FpuStatus.Oe = TRUE;
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
/* Calculate the remainder */
|
||||
Remainder = Value->Mantissa & ((1 << 11) - 1);
|
||||
|
||||
switch (State->FpuControl.Rc)
|
||||
{
|
||||
case FPU_ROUND_NEAREST:
|
||||
{
|
||||
/* Check if the highest bit of the remainder is set */
|
||||
if (Remainder & (1 << 10))
|
||||
{
|
||||
(*Result)++;
|
||||
|
||||
/* Check if all the other bits are clear */
|
||||
if (!(Remainder & ((1 << 10) - 1)))
|
||||
{
|
||||
/* Round to even */
|
||||
*Result &= ~1;
|
||||
}
|
||||
}
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
case FPU_ROUND_DOWN:
|
||||
{
|
||||
if ((Remainder != 0ULL) && Value->Sign) (*Result)++;
|
||||
break;
|
||||
}
|
||||
|
||||
case FPU_ROUND_UP:
|
||||
{
|
||||
if ((Remainder != 0ULL) && !Value->Sign) (*Result)++;
|
||||
break;
|
||||
}
|
||||
|
||||
default:
|
||||
{
|
||||
/* Leave it truncated */
|
||||
}
|
||||
}
|
||||
|
||||
/* Store the biased exponent */
|
||||
*Result |= (ULONGLONG)(UnbiasedExp + FPU_REAL8_BIAS) << 52;
|
||||
|
||||
SetSign:
|
||||
|
||||
if (Value->Sign) *Result |= 1ULL << 63;
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
static inline VOID FASTCALL
|
||||
Fast486FpuAdd(PFAST486_STATE State,
|
||||
PFAST486_FPU_DATA_REG FirstOperand,
|
||||
PFAST486_FPU_DATA_REG SecondOperand,
|
||||
|
|
@ -284,7 +371,7 @@ Fast486FpuAdd(PFAST486_STATE State,
|
|||
*Result = TempResult;
|
||||
}
|
||||
|
||||
static VOID
|
||||
static inline VOID FASTCALL
|
||||
Fast486FpuSubtract(PFAST486_STATE State,
|
||||
PFAST486_FPU_DATA_REG FirstOperand,
|
||||
PFAST486_FPU_DATA_REG SecondOperand,
|
||||
|
|
@ -299,7 +386,7 @@ Fast486FpuSubtract(PFAST486_STATE State,
|
|||
Fast486FpuAdd(State, Result, FirstOperand, &NegativeSecondOperand);
|
||||
}
|
||||
|
||||
static VOID
|
||||
static inline VOID FASTCALL
|
||||
Fast486FpuCompare(PFAST486_STATE State,
|
||||
PFAST486_FPU_DATA_REG FirstOperand,
|
||||
PFAST486_FPU_DATA_REG SecondOperand)
|
||||
|
|
@ -352,7 +439,7 @@ Fast486FpuCompare(PFAST486_STATE State,
|
|||
}
|
||||
}
|
||||
|
||||
static VOID
|
||||
static inline VOID FASTCALL
|
||||
Fast486FpuMultiply(PFAST486_STATE State,
|
||||
PFAST486_FPU_DATA_REG FirstOperand,
|
||||
PFAST486_FPU_DATA_REG SecondOperand,
|
||||
|
|
@ -378,7 +465,7 @@ Fast486FpuMultiply(PFAST486_STATE State,
|
|||
*Result = TempResult;
|
||||
}
|
||||
|
||||
static VOID
|
||||
static inline VOID FASTCALL
|
||||
Fast486FpuDivide(PFAST486_STATE State,
|
||||
PFAST486_FPU_DATA_REG FirstOperand,
|
||||
PFAST486_FPU_DATA_REG SecondOperand,
|
||||
|
|
@ -401,6 +488,72 @@ Fast486FpuDivide(PFAST486_STATE State,
|
|||
UNIMPLEMENTED;
|
||||
}
|
||||
|
||||
static inline VOID FASTCALL
|
||||
Fast486FpuArithmeticOperation(PFAST486_STATE State,
|
||||
INT Operation,
|
||||
PFAST486_FPU_DATA_REG SourceOperand,
|
||||
PFAST486_FPU_DATA_REG DestOperand)
|
||||
{
|
||||
ASSERT(!(Operation & ~7));
|
||||
|
||||
/* Check the operation */
|
||||
switch (Operation)
|
||||
{
|
||||
/* FADD */
|
||||
case 0:
|
||||
{
|
||||
Fast486FpuAdd(State, DestOperand, SourceOperand, DestOperand);
|
||||
break;
|
||||
}
|
||||
|
||||
/* FMUL */
|
||||
case 1:
|
||||
{
|
||||
Fast486FpuMultiply(State, DestOperand, SourceOperand, DestOperand);
|
||||
break;
|
||||
}
|
||||
|
||||
/* FCOM */
|
||||
case 2:
|
||||
/* FCOMP */
|
||||
case 3:
|
||||
{
|
||||
Fast486FpuCompare(State, DestOperand, SourceOperand);
|
||||
if (Operation == 3) Fast486FpuPop(State);
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
/* FSUB */
|
||||
case 4:
|
||||
{
|
||||
Fast486FpuSubtract(State, DestOperand, SourceOperand, DestOperand);
|
||||
break;
|
||||
}
|
||||
|
||||
/* FSUBR */
|
||||
case 5:
|
||||
{
|
||||
Fast486FpuSubtract(State, SourceOperand, DestOperand, DestOperand);
|
||||
break;
|
||||
}
|
||||
|
||||
/* FDIV */
|
||||
case 6:
|
||||
{
|
||||
Fast486FpuDivide(State, DestOperand, SourceOperand, DestOperand);
|
||||
break;
|
||||
}
|
||||
|
||||
/* FDIVR */
|
||||
case 7:
|
||||
{
|
||||
Fast486FpuDivide(State, SourceOperand, DestOperand, DestOperand);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
/* PUBLIC FUNCTIONS ***********************************************************/
|
||||
|
|
@ -497,62 +650,8 @@ FAST486_OPCODE_HANDLER(Fast486FpuOpcodeD8DC)
|
|||
}
|
||||
}
|
||||
|
||||
/* Check the operation */
|
||||
switch (ModRegRm.Register)
|
||||
{
|
||||
/* FADD */
|
||||
case 0:
|
||||
{
|
||||
Fast486FpuAdd(State, DestOperand, SourceOperand, DestOperand);
|
||||
break;
|
||||
}
|
||||
|
||||
/* FMUL */
|
||||
case 1:
|
||||
{
|
||||
Fast486FpuMultiply(State, DestOperand, SourceOperand, DestOperand);
|
||||
break;
|
||||
}
|
||||
|
||||
/* FCOM */
|
||||
case 2:
|
||||
/* FCOMP */
|
||||
case 3:
|
||||
{
|
||||
Fast486FpuCompare(State, DestOperand, SourceOperand);
|
||||
if (ModRegRm.Register == 3) Fast486FpuPop(State);
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
/* FSUB */
|
||||
case 4:
|
||||
{
|
||||
Fast486FpuSubtract(State, DestOperand, SourceOperand, DestOperand);
|
||||
break;
|
||||
}
|
||||
|
||||
/* FSUBR */
|
||||
case 5:
|
||||
{
|
||||
Fast486FpuSubtract(State, SourceOperand, DestOperand, DestOperand);
|
||||
break;
|
||||
}
|
||||
|
||||
/* FDIV */
|
||||
case 6:
|
||||
{
|
||||
Fast486FpuDivide(State, DestOperand, SourceOperand, DestOperand);
|
||||
break;
|
||||
}
|
||||
|
||||
/* FDIVR */
|
||||
case 7:
|
||||
{
|
||||
Fast486FpuDivide(State, SourceOperand, DestOperand, DestOperand);
|
||||
break;
|
||||
}
|
||||
}
|
||||
/* Perform the requested operation */
|
||||
Fast486FpuArithmeticOperation(State, ModRegRm.Register, SourceOperand, DestOperand);
|
||||
|
||||
#endif
|
||||
}
|
||||
|
|
@ -644,62 +743,8 @@ FAST486_OPCODE_HANDLER(Fast486FpuOpcodeDA)
|
|||
return;
|
||||
}
|
||||
|
||||
/* Check the operation */
|
||||
switch (ModRegRm.Register)
|
||||
{
|
||||
/* FIADD */
|
||||
case 0:
|
||||
{
|
||||
Fast486FpuAdd(State, DestOperand, SourceOperand, DestOperand);
|
||||
break;
|
||||
}
|
||||
|
||||
/* FIMUL */
|
||||
case 1:
|
||||
{
|
||||
Fast486FpuMultiply(State, DestOperand, SourceOperand, DestOperand);
|
||||
break;
|
||||
}
|
||||
|
||||
/* FICOM */
|
||||
case 2:
|
||||
/* FICOMP */
|
||||
case 3:
|
||||
{
|
||||
Fast486FpuCompare(State, DestOperand, SourceOperand);
|
||||
if (ModRegRm.Register == 3) Fast486FpuPop(State);
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
/* FISUB */
|
||||
case 4:
|
||||
{
|
||||
Fast486FpuSubtract(State, DestOperand, SourceOperand, DestOperand);
|
||||
break;
|
||||
}
|
||||
|
||||
/* FISUBR */
|
||||
case 5:
|
||||
{
|
||||
Fast486FpuSubtract(State, SourceOperand, DestOperand, DestOperand);
|
||||
break;
|
||||
}
|
||||
|
||||
/* FIDIV */
|
||||
case 6:
|
||||
{
|
||||
Fast486FpuDivide(State, DestOperand, SourceOperand, DestOperand);
|
||||
break;
|
||||
}
|
||||
|
||||
/* FIDIVR */
|
||||
case 7:
|
||||
{
|
||||
Fast486FpuDivide(State, SourceOperand, DestOperand, DestOperand);
|
||||
break;
|
||||
}
|
||||
}
|
||||
/* Perform the requested operation */
|
||||
Fast486FpuArithmeticOperation(State, ModRegRm.Register, SourceOperand, DestOperand);
|
||||
|
||||
#endif
|
||||
}
|
||||
|
|
@ -815,7 +860,7 @@ FAST486_OPCODE_HANDLER(Fast486FpuOpcodeDB)
|
|||
{
|
||||
UCHAR Buffer[10];
|
||||
|
||||
if ((FPU_GET_TAG(0) == FPU_TAG_EMPTY) || (FPU_GET_TAG(0) == FPU_TAG_SPECIAL))
|
||||
if (FPU_GET_TAG(0) == FPU_TAG_EMPTY)
|
||||
{
|
||||
/* Fail */
|
||||
State->FpuStatus.Ie = TRUE;
|
||||
|
|
@ -915,10 +960,174 @@ FAST486_OPCODE_HANDLER(Fast486FpuOpcodeDD)
|
|||
FPU_CHECK();
|
||||
|
||||
#ifndef FAST486_NO_FPU
|
||||
|
||||
if (ModRegRm.Memory)
|
||||
{
|
||||
switch (ModRegRm.Register)
|
||||
{
|
||||
/* FLD */
|
||||
case 0:
|
||||
{
|
||||
ULONGLONG Value;
|
||||
FAST486_FPU_DATA_REG MemoryData;
|
||||
|
||||
if (!Fast486ReadMemory(State,
|
||||
(State->PrefixFlags & FAST486_PREFIX_SEG)
|
||||
? State->SegmentOverride : FAST486_REG_DS,
|
||||
ModRegRm.MemoryAddress,
|
||||
FALSE,
|
||||
&Value,
|
||||
sizeof(ULONGLONG)))
|
||||
{
|
||||
/* Exception occurred */
|
||||
return;
|
||||
}
|
||||
|
||||
Fast486FpuFromDoubleReal(State, Value, &MemoryData);
|
||||
Fast486FpuPush(State, &MemoryData);
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
/* FST */
|
||||
case 2:
|
||||
/* FSTP */
|
||||
case 3:
|
||||
{
|
||||
ULONGLONG Value;
|
||||
|
||||
if (FPU_GET_TAG(0) == FPU_TAG_EMPTY)
|
||||
{
|
||||
/* Fail */
|
||||
State->FpuStatus.Ie = TRUE;
|
||||
return;
|
||||
}
|
||||
|
||||
if (!Fast486FpuToDoubleReal(State, &FPU_ST(0), &Value))
|
||||
{
|
||||
/* Exception occurred */
|
||||
return;
|
||||
}
|
||||
|
||||
if (!Fast486WriteMemory(State,
|
||||
(State->PrefixFlags & FAST486_PREFIX_SEG)
|
||||
? State->SegmentOverride : FAST486_REG_DS,
|
||||
ModRegRm.MemoryAddress,
|
||||
&Value,
|
||||
sizeof(ULONGLONG)))
|
||||
{
|
||||
/* Exception occurred */
|
||||
return;
|
||||
}
|
||||
|
||||
if (ModRegRm.Register == 3) Fast486FpuPop(State);
|
||||
break;
|
||||
}
|
||||
|
||||
/* FRSTOR */
|
||||
case 4:
|
||||
{
|
||||
// TODO: NOT IMPLEMENTED
|
||||
UNIMPLEMENTED;
|
||||
#else
|
||||
/* Do nothing */
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
/* FSAVE */
|
||||
case 6:
|
||||
{
|
||||
// TODO: NOT IMPLEMENTED
|
||||
UNIMPLEMENTED;
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
/* FSTSW */
|
||||
case 7:
|
||||
{
|
||||
Fast486WriteModrmWordOperands(State, &ModRegRm, FALSE, State->FpuStatus.Value);
|
||||
break;
|
||||
}
|
||||
|
||||
/* Invalid */
|
||||
default:
|
||||
{
|
||||
Fast486Exception(State, FAST486_EXCEPTION_UD);
|
||||
}
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
switch (ModRegRm.Register)
|
||||
{
|
||||
/* FFREE */
|
||||
case 0:
|
||||
{
|
||||
FPU_SET_TAG(ModRegRm.SecondRegister, FPU_TAG_EMPTY);
|
||||
break;
|
||||
}
|
||||
|
||||
/* FXCH */
|
||||
case 1:
|
||||
{
|
||||
FAST486_FPU_DATA_REG Temp;
|
||||
|
||||
if ((FPU_GET_TAG(0) == FPU_TAG_EMPTY)
|
||||
|| FPU_GET_TAG(ModRegRm.SecondRegister) == FPU_TAG_EMPTY)
|
||||
{
|
||||
State->FpuStatus.Ie = TRUE;
|
||||
break;
|
||||
}
|
||||
|
||||
/* Exchange */
|
||||
Temp = FPU_ST(0);
|
||||
FPU_ST(0) = FPU_ST(ModRegRm.SecondRegister);
|
||||
FPU_ST(ModRegRm.SecondRegister) = Temp;
|
||||
|
||||
FPU_UPDATE_TAG(0);
|
||||
FPU_UPDATE_TAG(ModRegRm.SecondRegister);
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
/* FST */
|
||||
case 2:
|
||||
/* FSTP */
|
||||
case 3:
|
||||
{
|
||||
FPU_ST(ModRegRm.SecondRegister) = FPU_ST(0);
|
||||
FPU_UPDATE_TAG(ModRegRm.SecondRegister);
|
||||
|
||||
if (ModRegRm.Register == 3) Fast486FpuPop(State);
|
||||
break;
|
||||
}
|
||||
|
||||
/* FUCOM */
|
||||
case 4:
|
||||
/* FUCOMP */
|
||||
case 5:
|
||||
{
|
||||
if ((FPU_GET_TAG(0) == FPU_TAG_EMPTY)
|
||||
|| (FPU_GET_TAG(ModRegRm.SecondRegister) == FPU_TAG_EMPTY))
|
||||
{
|
||||
State->FpuStatus.Ie = TRUE;
|
||||
return;
|
||||
}
|
||||
|
||||
Fast486FpuCompare(State, &FPU_ST(0), &FPU_ST(ModRegRm.SecondRegister));
|
||||
if (ModRegRm.Register == 5) Fast486FpuPop(State);
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
/* Invalid */
|
||||
default:
|
||||
{
|
||||
Fast486Exception(State, FAST486_EXCEPTION_UD);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#endif
|
||||
}
|
||||
|
||||
|
|
@ -991,63 +1200,8 @@ FAST486_OPCODE_HANDLER(Fast486FpuOpcodeDE)
|
|||
PopStack = TRUE;
|
||||
}
|
||||
|
||||
/* Check the operation */
|
||||
switch (ModRegRm.Register)
|
||||
{
|
||||
/* FIADD / FADDP */
|
||||
case 0:
|
||||
{
|
||||
Fast486FpuAdd(State, DestOperand, SourceOperand, DestOperand);
|
||||
break;
|
||||
}
|
||||
|
||||
/* FIMUL / FMULP */
|
||||
case 1:
|
||||
{
|
||||
Fast486FpuMultiply(State, DestOperand, SourceOperand, DestOperand);
|
||||
break;
|
||||
}
|
||||
|
||||
/* FICOM / FCOMP */
|
||||
case 2:
|
||||
/* FICOMP / FCOMPP */
|
||||
case 3:
|
||||
{
|
||||
Fast486FpuCompare(State, DestOperand, SourceOperand);
|
||||
if (ModRegRm.Register == 3) Fast486FpuPop(State);
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
/* FISUB / FSUBRP */
|
||||
case 4:
|
||||
{
|
||||
Fast486FpuSubtract(State, DestOperand, SourceOperand, DestOperand);
|
||||
break;
|
||||
}
|
||||
|
||||
/* FISUBR / FSUBP */
|
||||
case 5:
|
||||
{
|
||||
Fast486FpuSubtract(State, SourceOperand, DestOperand, DestOperand);
|
||||
break;
|
||||
}
|
||||
|
||||
/* FIDIV / FDIVRP */
|
||||
case 6:
|
||||
{
|
||||
Fast486FpuDivide(State, DestOperand, SourceOperand, DestOperand);
|
||||
break;
|
||||
}
|
||||
|
||||
/* FIDIVR / FDIVP */
|
||||
case 7:
|
||||
{
|
||||
Fast486FpuDivide(State, SourceOperand, DestOperand, DestOperand);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/* Perform the requested operation */
|
||||
Fast486FpuArithmeticOperation(State, ModRegRm.Register, SourceOperand, DestOperand);
|
||||
if (PopStack) Fast486FpuPop(State);
|
||||
|
||||
#endif
|
||||
|
|
|
|||
|
|
@ -34,11 +34,13 @@
|
|||
return; \
|
||||
}
|
||||
#define FPU_ST(i) State->FpuRegisters[(State->FpuStatus.Top + (i)) % FAST486_NUM_FPU_REGS]
|
||||
|
||||
#define FPU_GET_TAG(i) ((State->FpuTag >> ((i) * 2)) & 3)
|
||||
#define FPU_SET_TAG(i, t) { \
|
||||
State->FpuTag &= ~((1 << ((i) * 2)) | (1 << (((i) * 2) + 1))); \
|
||||
State->FpuTag |= ((t) & 3) << ((i) * 2); \
|
||||
}
|
||||
#define FPU_UPDATE_TAG(i) FPU_SET_TAG((i), Fast486GetValueTag(&FPU_ST(i)))
|
||||
|
||||
#define FPU_REAL4_BIAS 0x7F
|
||||
#define FPU_REAL8_BIAS 0x3FF
|
||||
|
|
|
|||
Loading…
Reference in a new issue