| //===- unittests/Basic/FixedPointTest.cpp -- fixed point number tests -----===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "clang/Basic/FixedPoint.h" |
| #include "llvm/ADT/APSInt.h" |
| #include "gtest/gtest.h" |
| |
| using clang::APFixedPoint; |
| using clang::FixedPointSemantics; |
| using llvm::APInt; |
| using llvm::APSInt; |
| |
| namespace { |
| |
| FixedPointSemantics Saturated(FixedPointSemantics Sema) { |
| Sema.setSaturated(true); |
| return Sema; |
| } |
| |
| FixedPointSemantics getSAccumSema() { |
| return FixedPointSemantics(/*width=*/16, /*scale=*/7, /*isSigned=*/true, |
| /*isSaturated=*/false, |
| /*hasUnsignedPadding=*/false); |
| } |
| |
| FixedPointSemantics getAccumSema() { |
| return FixedPointSemantics(/*width=*/32, /*scale=*/15, /*isSigned=*/true, |
| /*isSaturated=*/false, |
| /*hasUnsignedPadding=*/false); |
| } |
| |
| FixedPointSemantics getLAccumSema() { |
| return FixedPointSemantics(/*width=*/64, /*scale=*/31, /*isSigned=*/true, |
| /*isSaturated=*/false, |
| /*hasUnsignedPadding=*/false); |
| } |
| |
| FixedPointSemantics getSFractSema() { |
| return FixedPointSemantics(/*width=*/8, /*scale=*/7, /*isSigned=*/true, |
| /*isSaturated=*/false, |
| /*hasUnsignedPadding=*/false); |
| } |
| |
| FixedPointSemantics getFractSema() { |
| return FixedPointSemantics(/*width=*/16, /*scale=*/15, /*isSigned=*/true, |
| /*isSaturated=*/false, |
| /*hasUnsignedPadding=*/false); |
| } |
| |
| FixedPointSemantics getLFractSema() { |
| return FixedPointSemantics(/*width=*/32, /*scale=*/31, /*isSigned=*/true, |
| /*isSaturated=*/false, |
| /*hasUnsignedPadding=*/false); |
| } |
| |
| FixedPointSemantics getUSAccumSema() { |
| return FixedPointSemantics(/*width=*/16, /*scale=*/8, /*isSigned=*/false, |
| /*isSaturated=*/false, |
| /*hasUnsignedPadding=*/false); |
| } |
| |
| FixedPointSemantics getUAccumSema() { |
| return FixedPointSemantics(/*width=*/32, /*scale=*/16, /*isSigned=*/false, |
| /*isSaturated=*/false, |
| /*hasUnsignedPadding=*/false); |
| } |
| |
| FixedPointSemantics getULAccumSema() { |
| return FixedPointSemantics(/*width=*/64, /*scale=*/32, /*isSigned=*/false, |
| /*isSaturated=*/false, |
| /*hasUnsignedPadding=*/false); |
| } |
| |
| FixedPointSemantics getUSFractSema() { |
| return FixedPointSemantics(/*width=*/8, /*scale=*/8, /*isSigned=*/false, |
| /*isSaturated=*/false, |
| /*hasUnsignedPadding=*/false); |
| } |
| |
| FixedPointSemantics getUFractSema() { |
| return FixedPointSemantics(/*width=*/16, /*scale=*/16, /*isSigned=*/false, |
| /*isSaturated=*/false, |
| /*hasUnsignedPadding=*/false); |
| } |
| |
| FixedPointSemantics getULFractSema() { |
| return FixedPointSemantics(/*width=*/32, /*scale=*/32, /*isSigned=*/false, |
| /*isSaturated=*/false, |
| /*hasUnsignedPadding=*/false); |
| } |
| |
| FixedPointSemantics getPadUSAccumSema() { |
| return FixedPointSemantics(/*width=*/16, /*scale=*/7, /*isSigned=*/false, |
| /*isSaturated=*/false, |
| /*hasUnsignedPadding=*/true); |
| } |
| |
| FixedPointSemantics getPadUAccumSema() { |
| return FixedPointSemantics(/*width=*/32, /*scale=*/15, /*isSigned=*/false, |
| /*isSaturated=*/false, |
| /*hasUnsignedPadding=*/true); |
| } |
| |
| FixedPointSemantics getPadULAccumSema() { |
| return FixedPointSemantics(/*width=*/64, /*scale=*/31, /*isSigned=*/false, |
| /*isSaturated=*/false, |
| /*hasUnsignedPadding=*/true); |
| } |
| |
| FixedPointSemantics getPadUSFractSema() { |
| return FixedPointSemantics(/*width=*/8, /*scale=*/7, /*isSigned=*/false, |
| /*isSaturated=*/false, |
| /*hasUnsignedPadding=*/true); |
| } |
| |
| FixedPointSemantics getPadUFractSema() { |
| return FixedPointSemantics(/*width=*/16, /*scale=*/15, /*isSigned=*/false, |
| /*isSaturated=*/false, |
| /*hasUnsignedPadding=*/true); |
| } |
| |
| FixedPointSemantics getPadULFractSema() { |
| return FixedPointSemantics(/*width=*/32, /*scale=*/31, /*isSigned=*/false, |
| /*isSaturated=*/false, |
| /*hasUnsignedPadding=*/true); |
| } |
| |
| void CheckUnpaddedMax(const FixedPointSemantics &Sema) { |
| ASSERT_EQ(APFixedPoint::getMax(Sema).getValue(), |
| APSInt::getMaxValue(Sema.getWidth(), !Sema.isSigned())); |
| } |
| |
| void CheckPaddedMax(const FixedPointSemantics &Sema) { |
| ASSERT_EQ(APFixedPoint::getMax(Sema).getValue(), |
| APSInt::getMaxValue(Sema.getWidth(), !Sema.isSigned()) >> 1); |
| } |
| |
| void CheckMin(const FixedPointSemantics &Sema) { |
| ASSERT_EQ(APFixedPoint::getMin(Sema).getValue(), |
| APSInt::getMinValue(Sema.getWidth(), !Sema.isSigned())); |
| } |
| |
| TEST(FixedPointTest, getMax) { |
| CheckUnpaddedMax(getSAccumSema()); |
| CheckUnpaddedMax(getAccumSema()); |
| CheckUnpaddedMax(getLAccumSema()); |
| CheckUnpaddedMax(getUSAccumSema()); |
| CheckUnpaddedMax(getUAccumSema()); |
| CheckUnpaddedMax(getULAccumSema()); |
| CheckUnpaddedMax(getSFractSema()); |
| CheckUnpaddedMax(getFractSema()); |
| CheckUnpaddedMax(getLFractSema()); |
| CheckUnpaddedMax(getUSFractSema()); |
| CheckUnpaddedMax(getUFractSema()); |
| CheckUnpaddedMax(getULFractSema()); |
| |
| CheckPaddedMax(getPadUSAccumSema()); |
| CheckPaddedMax(getPadUAccumSema()); |
| CheckPaddedMax(getPadULAccumSema()); |
| CheckPaddedMax(getPadUSFractSema()); |
| CheckPaddedMax(getPadUFractSema()); |
| CheckPaddedMax(getPadULFractSema()); |
| } |
| |
| TEST(FixedPointTest, getMin) { |
| CheckMin(getSAccumSema()); |
| CheckMin(getAccumSema()); |
| CheckMin(getLAccumSema()); |
| CheckMin(getUSAccumSema()); |
| CheckMin(getUAccumSema()); |
| CheckMin(getULAccumSema()); |
| CheckMin(getSFractSema()); |
| CheckMin(getFractSema()); |
| CheckMin(getLFractSema()); |
| CheckMin(getUSFractSema()); |
| CheckMin(getUFractSema()); |
| CheckMin(getULFractSema()); |
| |
| CheckMin(getPadUSAccumSema()); |
| CheckMin(getPadUAccumSema()); |
| CheckMin(getPadULAccumSema()); |
| CheckMin(getPadUSFractSema()); |
| CheckMin(getPadUFractSema()); |
| CheckMin(getPadULFractSema()); |
| } |
| |
| void CheckIntPart(const FixedPointSemantics &Sema, int64_t IntPart) { |
| unsigned Scale = Sema.getScale(); |
| |
| // Value with a fraction |
| APFixedPoint ValWithFract(APInt(Sema.getWidth(), |
| (IntPart << Scale) + (1ULL << (Scale - 1)), |
| Sema.isSigned()), |
| Sema); |
| ASSERT_EQ(ValWithFract.getIntPart(), IntPart); |
| |
| // Just fraction |
| APFixedPoint JustFract( |
| APInt(Sema.getWidth(), (1ULL << (Scale - 1)), Sema.isSigned()), Sema); |
| ASSERT_EQ(JustFract.getIntPart(), 0); |
| |
| // Whole number |
| APFixedPoint WholeNum( |
| APInt(Sema.getWidth(), (IntPart << Scale), Sema.isSigned()), Sema); |
| ASSERT_EQ(WholeNum.getIntPart(), IntPart); |
| |
| // Negative |
| if (Sema.isSigned()) { |
| APFixedPoint Negative( |
| APInt(Sema.getWidth(), (IntPart << Scale), Sema.isSigned()), Sema); |
| ASSERT_EQ(Negative.getIntPart(), IntPart); |
| } |
| } |
| |
| void CheckIntPartMin(const FixedPointSemantics &Sema, int64_t Expected) { |
| ASSERT_EQ(APFixedPoint::getMin(Sema).getIntPart(), Expected); |
| } |
| |
| void CheckIntPartMax(const FixedPointSemantics &Sema, uint64_t Expected) { |
| ASSERT_EQ(APFixedPoint::getMax(Sema).getIntPart(), Expected); |
| } |
| |
| TEST(FixedPoint, getIntPart) { |
| // Normal values |
| CheckIntPart(getSAccumSema(), 2); |
| CheckIntPart(getAccumSema(), 2); |
| CheckIntPart(getLAccumSema(), 2); |
| CheckIntPart(getUSAccumSema(), 2); |
| CheckIntPart(getUAccumSema(), 2); |
| CheckIntPart(getULAccumSema(), 2); |
| |
| // Zero |
| CheckIntPart(getSAccumSema(), 0); |
| CheckIntPart(getAccumSema(), 0); |
| CheckIntPart(getLAccumSema(), 0); |
| CheckIntPart(getUSAccumSema(), 0); |
| CheckIntPart(getUAccumSema(), 0); |
| CheckIntPart(getULAccumSema(), 0); |
| |
| CheckIntPart(getSFractSema(), 0); |
| CheckIntPart(getFractSema(), 0); |
| CheckIntPart(getLFractSema(), 0); |
| CheckIntPart(getUSFractSema(), 0); |
| CheckIntPart(getUFractSema(), 0); |
| CheckIntPart(getULFractSema(), 0); |
| |
| // Min |
| CheckIntPartMin(getSAccumSema(), -256); |
| CheckIntPartMin(getAccumSema(), -65536); |
| CheckIntPartMin(getLAccumSema(), -4294967296); |
| |
| CheckIntPartMin(getSFractSema(), -1); |
| CheckIntPartMin(getFractSema(), -1); |
| CheckIntPartMin(getLFractSema(), -1); |
| |
| // Max |
| CheckIntPartMax(getSAccumSema(), 255); |
| CheckIntPartMax(getAccumSema(), 65535); |
| CheckIntPartMax(getLAccumSema(), 4294967295); |
| CheckIntPartMax(getUSAccumSema(), 255); |
| CheckIntPartMax(getUAccumSema(), 65535); |
| CheckIntPartMax(getULAccumSema(), 4294967295); |
| |
| CheckIntPartMax(getSFractSema(), 0); |
| CheckIntPartMax(getFractSema(), 0); |
| CheckIntPartMax(getLFractSema(), 0); |
| CheckIntPartMax(getUSFractSema(), 0); |
| CheckIntPartMax(getUFractSema(), 0); |
| CheckIntPartMax(getULFractSema(), 0); |
| |
| // Padded |
| // Normal Values |
| CheckIntPart(getPadUSAccumSema(), 2); |
| CheckIntPart(getPadUAccumSema(), 2); |
| CheckIntPart(getPadULAccumSema(), 2); |
| |
| // Zero |
| CheckIntPart(getPadUSAccumSema(), 0); |
| CheckIntPart(getPadUAccumSema(), 0); |
| CheckIntPart(getPadULAccumSema(), 0); |
| |
| CheckIntPart(getPadUSFractSema(), 0); |
| CheckIntPart(getPadUFractSema(), 0); |
| CheckIntPart(getPadULFractSema(), 0); |
| |
| // Max |
| CheckIntPartMax(getPadUSAccumSema(), 255); |
| CheckIntPartMax(getPadUAccumSema(), 65535); |
| CheckIntPartMax(getPadULAccumSema(), 4294967295); |
| |
| CheckIntPartMax(getPadUSFractSema(), 0); |
| CheckIntPartMax(getPadUFractSema(), 0); |
| CheckIntPartMax(getPadULFractSema(), 0); |
| } |
| |
| TEST(FixedPoint, compare) { |
| // Equality |
| // With fractional part (2.5) |
| // Across sizes |
| ASSERT_EQ(APFixedPoint(320, getSAccumSema()), |
| APFixedPoint(81920, getAccumSema())); |
| ASSERT_EQ(APFixedPoint(320, getSAccumSema()), |
| APFixedPoint(5368709120, getLAccumSema())); |
| ASSERT_EQ(APFixedPoint(0, getSAccumSema()), APFixedPoint(0, getLAccumSema())); |
| |
| // Across types (0.5) |
| ASSERT_EQ(APFixedPoint(64, getSAccumSema()), |
| APFixedPoint(64, getSFractSema())); |
| ASSERT_EQ(APFixedPoint(16384, getAccumSema()), |
| APFixedPoint(16384, getFractSema())); |
| ASSERT_EQ(APFixedPoint(1073741824, getLAccumSema()), |
| APFixedPoint(1073741824, getLFractSema())); |
| |
| // Across widths and types (0.5) |
| ASSERT_EQ(APFixedPoint(64, getSAccumSema()), |
| APFixedPoint(16384, getFractSema())); |
| ASSERT_EQ(APFixedPoint(64, getSAccumSema()), |
| APFixedPoint(1073741824, getLFractSema())); |
| |
| // Across saturation |
| ASSERT_EQ(APFixedPoint(320, getSAccumSema()), |
| APFixedPoint(81920, Saturated(getAccumSema()))); |
| |
| // Across signs |
| ASSERT_EQ(APFixedPoint(320, getSAccumSema()), |
| APFixedPoint(640, getUSAccumSema())); |
| ASSERT_EQ(APFixedPoint(-320, getSAccumSema()), |
| APFixedPoint(-81920, getAccumSema())); |
| |
| // Across padding |
| ASSERT_EQ(APFixedPoint(320, getSAccumSema()), |
| APFixedPoint(320, getPadUSAccumSema())); |
| ASSERT_EQ(APFixedPoint(640, getUSAccumSema()), |
| APFixedPoint(320, getPadUSAccumSema())); |
| |
| // Less than |
| ASSERT_LT(APFixedPoint(-1, getSAccumSema()), APFixedPoint(0, getAccumSema())); |
| ASSERT_LT(APFixedPoint(-1, getSAccumSema()), |
| APFixedPoint(0, getUAccumSema())); |
| ASSERT_LT(APFixedPoint(0, getSAccumSema()), APFixedPoint(1, getAccumSema())); |
| ASSERT_LT(APFixedPoint(0, getSAccumSema()), APFixedPoint(1, getUAccumSema())); |
| ASSERT_LT(APFixedPoint(0, getUSAccumSema()), APFixedPoint(1, getAccumSema())); |
| ASSERT_LT(APFixedPoint(0, getUSAccumSema()), |
| APFixedPoint(1, getUAccumSema())); |
| |
| // Greater than |
| ASSERT_GT(APFixedPoint(0, getAccumSema()), APFixedPoint(-1, getSAccumSema())); |
| ASSERT_GT(APFixedPoint(0, getUAccumSema()), |
| APFixedPoint(-1, getSAccumSema())); |
| ASSERT_GT(APFixedPoint(1, getAccumSema()), APFixedPoint(0, getSAccumSema())); |
| ASSERT_GT(APFixedPoint(1, getUAccumSema()), APFixedPoint(0, getSAccumSema())); |
| ASSERT_GT(APFixedPoint(1, getAccumSema()), APFixedPoint(0, getUSAccumSema())); |
| ASSERT_GT(APFixedPoint(1, getUAccumSema()), |
| APFixedPoint(0, getUSAccumSema())); |
| } |
| |
| // Check that a fixed point value in one sema is the same in another sema |
| void CheckUnsaturatedConversion(FixedPointSemantics Src, |
| FixedPointSemantics Dst, int64_t TestVal) { |
| int64_t ScaledVal = TestVal; |
| bool IsNegative = ScaledVal < 0; |
| if (IsNegative) |
| ScaledVal = -ScaledVal; |
| |
| if (Dst.getScale() > Src.getScale()) { |
| ScaledVal <<= (Dst.getScale() - Src.getScale()); |
| } else { |
| ScaledVal >>= (Src.getScale() - Dst.getScale()); |
| } |
| |
| if (IsNegative) |
| ScaledVal = -ScaledVal; |
| |
| APFixedPoint Fixed(TestVal, Src); |
| APFixedPoint Expected(ScaledVal, Dst); |
| ASSERT_EQ(Fixed.convert(Dst), Expected); |
| } |
| |
| // Check the value in a given fixed point sema overflows to the saturated min |
| // for another sema |
| void CheckSaturatedConversionMin(FixedPointSemantics Src, |
| FixedPointSemantics Dst, int64_t TestVal) { |
| APFixedPoint Fixed(TestVal, Src); |
| ASSERT_EQ(Fixed.convert(Dst), APFixedPoint::getMin(Dst)); |
| } |
| |
| // Check the value in a given fixed point sema overflows to the saturated max |
| // for another sema |
| void CheckSaturatedConversionMax(FixedPointSemantics Src, |
| FixedPointSemantics Dst, int64_t TestVal) { |
| APFixedPoint Fixed(TestVal, Src); |
| ASSERT_EQ(Fixed.convert(Dst), APFixedPoint::getMax(Dst)); |
| } |
| |
| // Check one signed _Accum sema converted to other sema for different values. |
| void CheckSignedAccumConversionsAgainstOthers(FixedPointSemantics Src, |
| int64_t OneVal) { |
| int64_t NormalVal = (OneVal * 2) + (OneVal / 2); // 2.5 |
| int64_t HalfVal = (OneVal / 2); // 0.5 |
| |
| // +Accums to Accums |
| CheckUnsaturatedConversion(Src, getSAccumSema(), NormalVal); |
| CheckUnsaturatedConversion(Src, getAccumSema(), NormalVal); |
| CheckUnsaturatedConversion(Src, getLAccumSema(), NormalVal); |
| CheckUnsaturatedConversion(Src, getUSAccumSema(), NormalVal); |
| CheckUnsaturatedConversion(Src, getUAccumSema(), NormalVal); |
| CheckUnsaturatedConversion(Src, getULAccumSema(), NormalVal); |
| CheckUnsaturatedConversion(Src, getPadUSAccumSema(), NormalVal); |
| CheckUnsaturatedConversion(Src, getPadUAccumSema(), NormalVal); |
| CheckUnsaturatedConversion(Src, getPadULAccumSema(), NormalVal); |
| |
| // -Accums to Accums |
| CheckUnsaturatedConversion(Src, getSAccumSema(), -NormalVal); |
| CheckUnsaturatedConversion(Src, getAccumSema(), -NormalVal); |
| CheckUnsaturatedConversion(Src, getLAccumSema(), -NormalVal); |
| CheckSaturatedConversionMin(Src, Saturated(getUSAccumSema()), -NormalVal); |
| CheckSaturatedConversionMin(Src, Saturated(getUAccumSema()), -NormalVal); |
| CheckSaturatedConversionMin(Src, Saturated(getULAccumSema()), -NormalVal); |
| CheckSaturatedConversionMin(Src, Saturated(getPadUSAccumSema()), -NormalVal); |
| CheckSaturatedConversionMin(Src, Saturated(getPadUAccumSema()), -NormalVal); |
| CheckSaturatedConversionMin(Src, Saturated(getPadULAccumSema()), -NormalVal); |
| |
| // +Accums to Fracts |
| CheckUnsaturatedConversion(Src, getSFractSema(), HalfVal); |
| CheckUnsaturatedConversion(Src, getFractSema(), HalfVal); |
| CheckUnsaturatedConversion(Src, getLFractSema(), HalfVal); |
| CheckUnsaturatedConversion(Src, getUSFractSema(), HalfVal); |
| CheckUnsaturatedConversion(Src, getUFractSema(), HalfVal); |
| CheckUnsaturatedConversion(Src, getULFractSema(), HalfVal); |
| CheckUnsaturatedConversion(Src, getPadUSFractSema(), HalfVal); |
| CheckUnsaturatedConversion(Src, getPadUFractSema(), HalfVal); |
| CheckUnsaturatedConversion(Src, getPadULFractSema(), HalfVal); |
| |
| // -Accums to Fracts |
| CheckUnsaturatedConversion(Src, getSFractSema(), -HalfVal); |
| CheckUnsaturatedConversion(Src, getFractSema(), -HalfVal); |
| CheckUnsaturatedConversion(Src, getLFractSema(), -HalfVal); |
| CheckSaturatedConversionMin(Src, Saturated(getUSFractSema()), -HalfVal); |
| CheckSaturatedConversionMin(Src, Saturated(getUFractSema()), -HalfVal); |
| CheckSaturatedConversionMin(Src, Saturated(getULFractSema()), -HalfVal); |
| CheckSaturatedConversionMin(Src, Saturated(getPadUSFractSema()), -HalfVal); |
| CheckSaturatedConversionMin(Src, Saturated(getPadUFractSema()), -HalfVal); |
| CheckSaturatedConversionMin(Src, Saturated(getPadULFractSema()), -HalfVal); |
| |
| // 0 to Accums |
| CheckUnsaturatedConversion(Src, getSAccumSema(), 0); |
| CheckUnsaturatedConversion(Src, getAccumSema(), 0); |
| CheckUnsaturatedConversion(Src, getLAccumSema(), 0); |
| CheckUnsaturatedConversion(Src, getUSAccumSema(), 0); |
| CheckUnsaturatedConversion(Src, getUAccumSema(), 0); |
| CheckUnsaturatedConversion(Src, getULAccumSema(), 0); |
| CheckUnsaturatedConversion(Src, getPadUSAccumSema(), 0); |
| CheckUnsaturatedConversion(Src, getPadUAccumSema(), 0); |
| CheckUnsaturatedConversion(Src, getPadULAccumSema(), 0); |
| |
| // 0 to Fracts |
| CheckUnsaturatedConversion(Src, getSFractSema(), 0); |
| CheckUnsaturatedConversion(Src, getFractSema(), 0); |
| CheckUnsaturatedConversion(Src, getLFractSema(), 0); |
| CheckUnsaturatedConversion(Src, getUSFractSema(), 0); |
| CheckUnsaturatedConversion(Src, getUFractSema(), 0); |
| CheckUnsaturatedConversion(Src, getULFractSema(), 0); |
| CheckUnsaturatedConversion(Src, getPadUSFractSema(), 0); |
| CheckUnsaturatedConversion(Src, getPadUFractSema(), 0); |
| CheckUnsaturatedConversion(Src, getPadULFractSema(), 0); |
| } |
| |
| // Check one unsigned _Accum sema converted to other sema for different |
| // values. |
| void CheckUnsignedAccumConversionsAgainstOthers(FixedPointSemantics Src, |
| int64_t OneVal) { |
| int64_t NormalVal = (OneVal * 2) + (OneVal / 2); // 2.5 |
| int64_t HalfVal = (OneVal / 2); // 0.5 |
| |
| // +UAccums to Accums |
| CheckUnsaturatedConversion(Src, getSAccumSema(), NormalVal); |
| CheckUnsaturatedConversion(Src, getAccumSema(), NormalVal); |
| CheckUnsaturatedConversion(Src, getLAccumSema(), NormalVal); |
| CheckUnsaturatedConversion(Src, getUSAccumSema(), NormalVal); |
| CheckUnsaturatedConversion(Src, getUAccumSema(), NormalVal); |
| CheckUnsaturatedConversion(Src, getULAccumSema(), NormalVal); |
| CheckUnsaturatedConversion(Src, getPadUSAccumSema(), NormalVal); |
| CheckUnsaturatedConversion(Src, getPadUAccumSema(), NormalVal); |
| CheckUnsaturatedConversion(Src, getPadULAccumSema(), NormalVal); |
| |
| // +UAccums to Fracts |
| CheckUnsaturatedConversion(Src, getSFractSema(), HalfVal); |
| CheckUnsaturatedConversion(Src, getFractSema(), HalfVal); |
| CheckUnsaturatedConversion(Src, getLFractSema(), HalfVal); |
| CheckUnsaturatedConversion(Src, getUSFractSema(), HalfVal); |
| CheckUnsaturatedConversion(Src, getUFractSema(), HalfVal); |
| CheckUnsaturatedConversion(Src, getULFractSema(), HalfVal); |
| CheckUnsaturatedConversion(Src, getPadUSFractSema(), HalfVal); |
| CheckUnsaturatedConversion(Src, getPadUFractSema(), HalfVal); |
| CheckUnsaturatedConversion(Src, getPadULFractSema(), HalfVal); |
| } |
| |
| TEST(FixedPoint, AccumConversions) { |
| // Normal conversions |
| CheckSignedAccumConversionsAgainstOthers(getSAccumSema(), 128); |
| CheckUnsignedAccumConversionsAgainstOthers(getUSAccumSema(), 256); |
| CheckSignedAccumConversionsAgainstOthers(getAccumSema(), 32768); |
| CheckUnsignedAccumConversionsAgainstOthers(getUAccumSema(), 65536); |
| CheckSignedAccumConversionsAgainstOthers(getLAccumSema(), 2147483648); |
| CheckUnsignedAccumConversionsAgainstOthers(getULAccumSema(), 4294967296); |
| |
| CheckUnsignedAccumConversionsAgainstOthers(getPadUSAccumSema(), 128); |
| CheckUnsignedAccumConversionsAgainstOthers(getPadUAccumSema(), 32768); |
| CheckUnsignedAccumConversionsAgainstOthers(getPadULAccumSema(), 2147483648); |
| } |
| |
| TEST(FixedPoint, AccumConversionOverflow) { |
| // To SAccum max limit (65536) |
| CheckSaturatedConversionMax(getLAccumSema(), Saturated(getAccumSema()), |
| 140737488355328); |
| CheckSaturatedConversionMax(getLAccumSema(), Saturated(getUAccumSema()), |
| 140737488355328); |
| CheckSaturatedConversionMax(getLAccumSema(), Saturated(getPadUAccumSema()), |
| 140737488355328); |
| CheckSaturatedConversionMax(getULAccumSema(), Saturated(getAccumSema()), |
| 281474976710656); |
| CheckSaturatedConversionMax(getULAccumSema(), Saturated(getUAccumSema()), |
| 281474976710656); |
| CheckSaturatedConversionMax(getULAccumSema(), Saturated(getPadUAccumSema()), |
| 281474976710656); |
| |
| CheckSaturatedConversionMax(getPadULAccumSema(), Saturated(getAccumSema()), |
| 140737488355328); |
| CheckSaturatedConversionMax(getPadULAccumSema(), Saturated(getUAccumSema()), |
| 140737488355328); |
| CheckSaturatedConversionMax(getPadULAccumSema(), |
| Saturated(getPadUAccumSema()), 140737488355328); |
| |
| // To SAccum min limit (-65536) |
| CheckSaturatedConversionMin(getLAccumSema(), Saturated(getAccumSema()), |
| -140737488355328); |
| CheckSaturatedConversionMin(getLAccumSema(), Saturated(getUAccumSema()), |
| -140737488355328); |
| CheckSaturatedConversionMin(getLAccumSema(), Saturated(getPadUAccumSema()), |
| -140737488355328); |
| } |
| |
| TEST(FixedPoint, SAccumConversionOverflow) { |
| // To SAccum max limit (256) |
| CheckSaturatedConversionMax(getAccumSema(), Saturated(getSAccumSema()), |
| 8388608); |
| CheckSaturatedConversionMax(getAccumSema(), Saturated(getUSAccumSema()), |
| 8388608); |
| CheckSaturatedConversionMax(getAccumSema(), Saturated(getPadUSAccumSema()), |
| 8388608); |
| CheckSaturatedConversionMax(getUAccumSema(), Saturated(getSAccumSema()), |
| 16777216); |
| CheckSaturatedConversionMax(getUAccumSema(), Saturated(getUSAccumSema()), |
| 16777216); |
| CheckSaturatedConversionMax(getUAccumSema(), Saturated(getPadUSAccumSema()), |
| 16777216); |
| CheckSaturatedConversionMax(getLAccumSema(), Saturated(getSAccumSema()), |
| 549755813888); |
| CheckSaturatedConversionMax(getLAccumSema(), Saturated(getUSAccumSema()), |
| 549755813888); |
| CheckSaturatedConversionMax(getLAccumSema(), Saturated(getPadUSAccumSema()), |
| 549755813888); |
| CheckSaturatedConversionMax(getULAccumSema(), Saturated(getSAccumSema()), |
| 1099511627776); |
| CheckSaturatedConversionMax(getULAccumSema(), Saturated(getUSAccumSema()), |
| 1099511627776); |
| CheckSaturatedConversionMax(getULAccumSema(), Saturated(getPadUSAccumSema()), |
| 1099511627776); |
| |
| CheckSaturatedConversionMax(getPadUAccumSema(), Saturated(getSAccumSema()), |
| 8388608); |
| CheckSaturatedConversionMax(getPadUAccumSema(), Saturated(getUSAccumSema()), |
| 8388608); |
| CheckSaturatedConversionMax(getPadUAccumSema(), |
| Saturated(getPadUSAccumSema()), 8388608); |
| CheckSaturatedConversionMax(getPadULAccumSema(), Saturated(getSAccumSema()), |
| 549755813888); |
| CheckSaturatedConversionMax(getPadULAccumSema(), Saturated(getUSAccumSema()), |
| 549755813888); |
| CheckSaturatedConversionMax(getPadULAccumSema(), |
| Saturated(getPadUSAccumSema()), 549755813888); |
| |
| // To SAccum min limit (-256) |
| CheckSaturatedConversionMin(getAccumSema(), Saturated(getSAccumSema()), |
| -8388608); |
| CheckSaturatedConversionMin(getAccumSema(), Saturated(getUSAccumSema()), |
| -8388608); |
| CheckSaturatedConversionMin(getAccumSema(), Saturated(getPadUSAccumSema()), |
| -8388608); |
| CheckSaturatedConversionMin(getLAccumSema(), Saturated(getSAccumSema()), |
| -549755813888); |
| CheckSaturatedConversionMin(getLAccumSema(), Saturated(getUSAccumSema()), |
| -549755813888); |
| CheckSaturatedConversionMin(getLAccumSema(), Saturated(getPadUSAccumSema()), |
| -549755813888); |
| } |
| |
| TEST(FixedPoint, GetValueSignAfterConversion) { |
| APFixedPoint Fixed(255 << 7, getSAccumSema()); |
| ASSERT_TRUE(Fixed.getValue().isSigned()); |
| APFixedPoint UFixed = Fixed.convert(getUSAccumSema()); |
| ASSERT_TRUE(UFixed.getValue().isUnsigned()); |
| ASSERT_EQ(UFixed.getValue(), APSInt::getUnsigned(255 << 8).extOrTrunc(16)); |
| } |
| |
| TEST(FixedPoint, ModularWrapAround) { |
| // Positive to negative |
| APFixedPoint Val = APFixedPoint(1ULL << 7, getSAccumSema()); |
| ASSERT_EQ(Val.convert(getLFractSema()).getValue(), -(1ULL << 31)); |
| |
| Val = APFixedPoint(1ULL << 23, getAccumSema()); |
| ASSERT_EQ(Val.convert(getSAccumSema()).getValue(), -(1ULL << 15)); |
| |
| Val = APFixedPoint(1ULL << 47, getLAccumSema()); |
| ASSERT_EQ(Val.convert(getAccumSema()).getValue(), -(1ULL << 31)); |
| |
| // Negative to positive |
| Val = APFixedPoint(/*-1.5*/ -192, getSAccumSema()); |
| ASSERT_EQ(Val.convert(getLFractSema()).getValue(), 1ULL << 30); |
| |
| Val = APFixedPoint(-(257 << 15), getAccumSema()); |
| ASSERT_EQ(Val.convert(getSAccumSema()).getValue(), 255 << 7); |
| |
| Val = APFixedPoint(-(65537ULL << 31), getLAccumSema()); |
| ASSERT_EQ(Val.convert(getAccumSema()).getValue(), 65535 << 15); |
| |
| // Signed to unsigned |
| Val = APFixedPoint(-(1 << 7), getSAccumSema()); |
| ASSERT_EQ(Val.convert(getUSAccumSema()).getValue(), 255 << 8); |
| |
| Val = APFixedPoint(-(1 << 15), getAccumSema()); |
| ASSERT_EQ(Val.convert(getUAccumSema()).getValue(), 65535ULL << 16); |
| |
| Val = APFixedPoint(-(1ULL << 31), getLAccumSema()); |
| ASSERT_EQ(Val.convert(getULAccumSema()).getValue().getZExtValue(), |
| 4294967295ULL << 32); |
| } |
| |
| } // namespace |
