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[FAST486]

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Implement FCHS, FABS, FTST, FXAM, FLD1, FLDL2T, FLDL2E, FLDPI, FLDLG2, FLDLN2 and FLDZ.


svn path=/trunk/; revision=66154
This commit is contained in:
Aleksandar Andrejevic 2015-02-04 02:47:13 +00:00
parent 56608c8fe0
commit 0027e5a95a
3 changed files with 151 additions and 34 deletions
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2
reactos/include/reactos/libs/fast486/fast486.h
View file

@ -429,6 +429,8 @@ typedef struct _FAST486_FPU_DATA_REG
UCHAR Sign;
} FAST486_FPU_DATA_REG, *PFAST486_FPU_DATA_REG;
typedef const FAST486_FPU_DATA_REG *PCFAST486_FPU_DATA_REG;
typedef union _FAST486_FPU_STATUS_REG
{
USHORT Value;

2
reactos/lib/fast486/common.inl
View file

@ -1578,7 +1578,7 @@ FORCEINLINE
BOOLEAN
FASTCALL
Fast486FpuPush(PFAST486_STATE State,
PFAST486_FPU_DATA_REG Data)
PCFAST486_FPU_DATA_REG Data)
{
State->FpuStatus.Top--;

181
reactos/lib/fast486/fpu.c
View file

@ -30,6 +30,64 @@
#include "common.h"
#include "fpu.h"
/* CONSTANTS ******************************************************************/
/* 0.00 */
static const FAST486_FPU_DATA_REG FpuZero =
{
.Sign = FALSE,
.Exponent = 0,
.Mantissa = 0ULL
};
/* 1.00 */
static const FAST486_FPU_DATA_REG FpuOne =
{
.Sign = FALSE,
.Exponent = FPU_REAL10_BIAS,
.Mantissa = 0x8000000000000000ULL
};
/* Pi */
static const FAST486_FPU_DATA_REG FpuPi =
{
.Sign = FALSE,
.Exponent = FPU_REAL10_BIAS + 1,
.Mantissa = 0xC90FDAA22168C234ULL
};
/* lb(10) */
static const FAST486_FPU_DATA_REG FpuL2Ten =
{
.Sign = FALSE,
.Exponent = FPU_REAL10_BIAS + 1,
.Mantissa = 0xD49A784BCD1D8AFEULL
};
/* lb(e) */
static const FAST486_FPU_DATA_REG FpuL2E =
{
.Sign = FALSE,
.Exponent = FPU_REAL10_BIAS,
.Mantissa = 0xB8AA3B295C17F0BBULL
};
/* lg(2) */
static const FAST486_FPU_DATA_REG FpuLgTwo =
{
.Sign = FALSE,
.Exponent = FPU_REAL10_BIAS - 2,
.Mantissa = 0x9A209A84FBCFF798ULL
};
/* ln(2) */
static const FAST486_FPU_DATA_REG FpuLnTwo =
{
.Sign = FALSE,
.Exponent = FPU_REAL10_BIAS - 1,
.Mantissa = 0xB17217F7D1CF79ABULL
};
/* PRIVATE FUNCTIONS **********************************************************/
#ifndef FAST486_NO_FPU
@ -167,7 +225,7 @@ Fast486FpuFromInteger(PFAST486_STATE State,
static inline BOOLEAN FASTCALL
Fast486FpuToInteger(PFAST486_STATE State,
PFAST486_FPU_DATA_REG Value,
PCFAST486_FPU_DATA_REG Value,
PLONGLONG Result)
{
ULONG Bits;
@ -272,7 +330,7 @@ Fast486FpuFromSingleReal(PFAST486_STATE State,
static inline BOOLEAN FASTCALL
Fast486FpuToSingleReal(PFAST486_STATE State,
PFAST486_FPU_DATA_REG Value,
PCFAST486_FPU_DATA_REG Value,
PULONG Result)
{
ULONGLONG Remainder;
@ -404,7 +462,7 @@ Fast486FpuFromDoubleReal(PFAST486_STATE State,
static inline BOOLEAN FASTCALL
Fast486FpuToDoubleReal(PFAST486_STATE State,
PFAST486_FPU_DATA_REG Value,
PCFAST486_FPU_DATA_REG Value,
PULONGLONG Result)
{
ULONGLONG Remainder;
@ -536,7 +594,7 @@ Fast486FpuFromPackedBcd(PFAST486_STATE State,
static inline BOOLEAN FASTCALL
Fast486FpuToPackedBcd(PFAST486_STATE State,
PFAST486_FPU_DATA_REG Value,
PCFAST486_FPU_DATA_REG Value,
PUCHAR Result)
{
INT i;
@ -562,8 +620,8 @@ Fast486FpuToPackedBcd(PFAST486_STATE State,
static inline VOID FASTCALL
Fast486FpuAdd(PFAST486_STATE State,
PFAST486_FPU_DATA_REG FirstOperand,
PFAST486_FPU_DATA_REG SecondOperand,
PCFAST486_FPU_DATA_REG FirstOperand,
PCFAST486_FPU_DATA_REG SecondOperand,
PFAST486_FPU_DATA_REG Result)
{
FAST486_FPU_DATA_REG FirstAdjusted = *FirstOperand;
@ -656,8 +714,8 @@ Fast486FpuAdd(PFAST486_STATE State,
static inline VOID FASTCALL
Fast486FpuSubtract(PFAST486_STATE State,
PFAST486_FPU_DATA_REG FirstOperand,
PFAST486_FPU_DATA_REG SecondOperand,
PCFAST486_FPU_DATA_REG FirstOperand,
PCFAST486_FPU_DATA_REG SecondOperand,
PFAST486_FPU_DATA_REG Result)
{
FAST486_FPU_DATA_REG NegativeSecondOperand = *SecondOperand;
@ -671,8 +729,8 @@ Fast486FpuSubtract(PFAST486_STATE State,
static inline VOID FASTCALL
Fast486FpuCompare(PFAST486_STATE State,
PFAST486_FPU_DATA_REG FirstOperand,
PFAST486_FPU_DATA_REG SecondOperand)
PCFAST486_FPU_DATA_REG FirstOperand,
PCFAST486_FPU_DATA_REG SecondOperand)
{
if (FPU_IS_NAN(FirstOperand) || FPU_IS_NAN(SecondOperand))
{
@ -724,8 +782,8 @@ Fast486FpuCompare(PFAST486_STATE State,
static inline VOID FASTCALL
Fast486FpuMultiply(PFAST486_STATE State,
PFAST486_FPU_DATA_REG FirstOperand,
PFAST486_FPU_DATA_REG SecondOperand,
PCFAST486_FPU_DATA_REG FirstOperand,
PCFAST486_FPU_DATA_REG SecondOperand,
PFAST486_FPU_DATA_REG Result)
{
FAST486_FPU_DATA_REG TempResult;
@ -756,8 +814,8 @@ Fast486FpuMultiply(PFAST486_STATE State,
static inline VOID FASTCALL
Fast486FpuDivide(PFAST486_STATE State,
PFAST486_FPU_DATA_REG FirstOperand,
PFAST486_FPU_DATA_REG SecondOperand,
PCFAST486_FPU_DATA_REG FirstOperand,
PCFAST486_FPU_DATA_REG SecondOperand,
PFAST486_FPU_DATA_REG Result)
{
FAST486_FPU_DATA_REG TempResult;
@ -1309,8 +1367,16 @@ FAST486_OPCODE_HANDLER(Fast486FpuOpcodeD9)
/* FCHS */
case 0x20:
{
// TODO: NOT IMPLEMENTED
UNIMPLEMENTED;
if (FPU_GET_TAG(0) == FPU_TAG_EMPTY)
{
State->FpuStatus.Ie = TRUE;
if (!State->FpuControl.Im) Fast486FpuException(State);
break;
}
/* Invert the sign */
FPU_ST(0).Sign = !FPU_ST(0).Sign;
break;
}
@ -1318,8 +1384,16 @@ FAST486_OPCODE_HANDLER(Fast486FpuOpcodeD9)
/* FABS */
case 0x21:
{
// TODO: NOT IMPLEMENTED
UNIMPLEMENTED;
if (FPU_GET_TAG(0) == FPU_TAG_EMPTY)
{
State->FpuStatus.Ie = TRUE;
if (!State->FpuControl.Im) Fast486FpuException(State);
break;
}
/* Set the sign to positive */
FPU_ST(0).Sign = FALSE;
break;
}
@ -1327,26 +1401,58 @@ FAST486_OPCODE_HANDLER(Fast486FpuOpcodeD9)
/* FTST */
case 0x24:
{
// TODO: NOT IMPLEMENTED
UNIMPLEMENTED;
Fast486FpuCompare(State, &FPU_ST(0), &FpuZero);
break;
}
/* FXAM */
case 0x25:
{
// TODO: NOT IMPLEMENTED
UNIMPLEMENTED;
/* The sign bit goes in C1, even if the register's empty */
State->FpuStatus.Code1 = FPU_ST(0).Sign;
break;
}
/* FTSTP */
case 0x26:
{
// TODO: NOT IMPLEMENTED
UNIMPLEMENTED;
if (FPU_GET_TAG(0) == FPU_TAG_EMPTY)
{
State->FpuStatus.Code0 = 1;
State->FpuStatus.Code2 = 0;
State->FpuStatus.Code3 = 1;
}
else if (FPU_GET_TAG(0) == FPU_TAG_SPECIAL)
{
if (FPU_IS_INFINITY(&FPU_ST(0)))
{
State->FpuStatus.Code0 = 1;
State->FpuStatus.Code2 = 1;
State->FpuStatus.Code3 = 0;
}
else
{
State->FpuStatus.Code0 = 1;
State->FpuStatus.Code2 = 0;
State->FpuStatus.Code3 = 0;
}
}
else if (FPU_GET_TAG(0) == FPU_TAG_ZERO)
{
State->FpuStatus.Code0 = 0;
State->FpuStatus.Code2 = 0;
State->FpuStatus.Code3 = 1;
}
else
{
if (FPU_IS_NORMALIZED(&FPU_ST(0)))
{
State->FpuStatus.Code0 = 0;
State->FpuStatus.Code2 = 1;
State->FpuStatus.Code3 = 0;
}
else
{
State->FpuStatus.Code0 = 0;
State->FpuStatus.Code2 = 1;
State->FpuStatus.Code3 = 1;
}
}
break;
}
@ -1366,9 +1472,18 @@ FAST486_OPCODE_HANDLER(Fast486FpuOpcodeD9)
/* FLDZ */
case 0x2E:
{
// TODO: NOT IMPLEMENTED
UNIMPLEMENTED;
PCFAST486_FPU_DATA_REG Constants[] =
{
&FpuOne,
&FpuL2Ten,
&FpuL2E,
&FpuPi,
&FpuLgTwo,
&FpuLnTwo,
&FpuZero
};
Fast486FpuPush(State, Constants[ModRegRm.SecondRegister]);
break;
}