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