forked from OSchip/llvm-project
646 lines
26 KiB
C++
646 lines
26 KiB
C++
//===- unittests/Basic/FixedPointTest.cpp -- fixed point number tests -----===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#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
|