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[FAST486]
- Fix the FPU constants. - Fix rounding. - Fix FSCALE. svn path=/trunk/; revision=67873
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@ -39,19 +39,19 @@ static const FAST486_FPU_DATA_REG FpuZero = {0ULL, 0, FALSE};
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static const FAST486_FPU_DATA_REG FpuOne = {0x8000000000000000ULL, FPU_REAL10_BIAS, FALSE};
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/* Pi */
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static const FAST486_FPU_DATA_REG FpuPi = {0xC90FDAA22168C234ULL, FPU_REAL10_BIAS + 1, FALSE};
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static const FAST486_FPU_DATA_REG FpuPi = {0xC90FDAA22168C235ULL, FPU_REAL10_BIAS + 1, FALSE};
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/* lb(10) */
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static const FAST486_FPU_DATA_REG FpuL2Ten = {0xD49A784BCD1D8AFEULL, FPU_REAL10_BIAS + 1, FALSE};
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static const FAST486_FPU_DATA_REG FpuL2Ten = {0xD49A784BCD1B8AFEULL, FPU_REAL10_BIAS + 1, FALSE};
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/* lb(e) */
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static const FAST486_FPU_DATA_REG FpuL2E = {0xB8AA3B295C17F0BBULL, FPU_REAL10_BIAS, FALSE};
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static const FAST486_FPU_DATA_REG FpuL2E = {0xB8AA3B295C17F0BCULL, FPU_REAL10_BIAS, FALSE};
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/* lg(2) */
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static const FAST486_FPU_DATA_REG FpuLgTwo = {0x9A209A84FBCFF798ULL, FPU_REAL10_BIAS - 2, FALSE};
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static const FAST486_FPU_DATA_REG FpuLgTwo = {0x9A209A84FBCFF799ULL, FPU_REAL10_BIAS - 2, FALSE};
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/* ln(2) */
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static const FAST486_FPU_DATA_REG FpuLnTwo = {0xB17217F7D1CF79ABULL, FPU_REAL10_BIAS - 1, FALSE};
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static const FAST486_FPU_DATA_REG FpuLnTwo = {0xB17217F7D1CF79ACULL, FPU_REAL10_BIAS - 1, FALSE};
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/* 2.00 */
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static const FAST486_FPU_DATA_REG FpuTwo = {0x8000000000000000ULL, FPU_REAL10_BIAS + 1, FALSE};
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@ -246,10 +246,10 @@ Fast486FpuRound(PFAST486_STATE State,
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(*Result)++;
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/* Check if all the other bits are clear */
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if (!(Remainder & ((1ULL << RemainderHighBit) - 1)))
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if (!(Remainder & ((1ULL << RemainderHighBit) - 1ULL)))
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{
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/* Round to even */
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*Result &= ~1;
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*Result &= ~1ULL;
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}
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}
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@ -336,7 +336,7 @@ Fast486FpuToInteger(PFAST486_STATE State,
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/* Calculate the result and the remainder */
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*Result = (LONGLONG)(Value->Mantissa >> Bits);
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Remainder = Value->Mantissa & ((1 << Bits) - 1);
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Remainder = Value->Mantissa & ((1ULL << Bits) - 1);
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}
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else
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{
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@ -548,7 +548,7 @@ Fast486FpuToDoubleReal(PFAST486_STATE State,
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}
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/* Calculate the remainder */
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Remainder = Value->Mantissa & ((1 << 11) - 1);
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Remainder = Value->Mantissa & ((1ULL << 11) - 1ULL);
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/* Store the biased exponent */
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*Result |= (ULONGLONG)(UnbiasedExp + FPU_REAL8_BIAS) << 52;
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@ -1075,7 +1075,7 @@ Fast486FpuCalculateTwoPowerMinusOne(PFAST486_STATE State,
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if (!Fast486FpuMultiply(State, &Value, &FpuLnTwo, &Value)) return;
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if (!Fast486FpuAdd(State, &Value, &Value, &SeriesElement)) return;
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for (i = 2; i <= INVERSE_NUMBERS_COUNT / 2; i++)
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for (i = 2; i <= INVERSE_NUMBERS_COUNT; i++)
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{
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/* Add the series element to the final sum */
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if (!Fast486FpuAdd(State, &TempResult, &SeriesElement, &TempResult))
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@ -2195,6 +2195,7 @@ FAST486_OPCODE_HANDLER(Fast486FpuOpcodeD9)
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{
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LONGLONG Scale;
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LONGLONG UnbiasedExp = (LONGLONG)((SHORT)FPU_ST(0).Exponent) - FPU_REAL10_BIAS;
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INT OldRoundingMode = State->FpuControl.Rc;
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FPU_SAVE_LAST_INST();
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@ -2217,12 +2218,17 @@ FAST486_OPCODE_HANDLER(Fast486FpuOpcodeD9)
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}
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}
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State->FpuControl.Rc = FPU_ROUND_TRUNCATE;
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if (!Fast486FpuToInteger(State, &FPU_ST(1), &Scale))
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{
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/* Exception occurred */
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State->FpuControl.Rc = OldRoundingMode;
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break;
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}
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State->FpuControl.Rc = OldRoundingMode;
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/* Adjust the unbiased exponent */
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UnbiasedExp += Scale;
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