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//===-- Utility class to test different flavors of fdim ---------*- C++ -*-===//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
#include "src/__support/FPUtil/BasicOperations.h"
#include "src/__support/FPUtil/FPBits.h"
#include "utils/UnitTest/FPMatcher.h"
#include "utils/UnitTest/Test.h"
#include <math.h>
template <typename T>
class FDimTestTemplate : public __llvm_libc::testing::Test {
using FuncPtr = T (*)(T, T);
using FPBits = __llvm_libc::fputil::FPBits<T>;
using UIntType = typename FPBits::UIntType;
void testNaNArg(FuncPtr func) {
EXPECT_FP_EQ(nan, func(nan, inf));
EXPECT_FP_EQ(nan, func(negInf, nan));
EXPECT_FP_EQ(nan, func(nan, zero));
EXPECT_FP_EQ(nan, func(negZero, nan));
EXPECT_FP_EQ(nan, func(nan, T(-1.2345)));
EXPECT_FP_EQ(nan, func(T(1.2345), nan));
EXPECT_FP_EQ(func(nan, nan), nan);
void testInfArg(FuncPtr func) {
EXPECT_FP_EQ(zero, func(negInf, inf));
EXPECT_FP_EQ(inf, func(inf, zero));
EXPECT_FP_EQ(zero, func(negZero, inf));
EXPECT_FP_EQ(inf, func(inf, T(1.2345)));
EXPECT_FP_EQ(zero, func(T(-1.2345), inf));
void testNegInfArg(FuncPtr func) {
EXPECT_FP_EQ(inf, func(inf, negInf));
EXPECT_FP_EQ(zero, func(negInf, zero));
EXPECT_FP_EQ(inf, func(negZero, negInf));
EXPECT_FP_EQ(zero, func(negInf, T(-1.2345)));
EXPECT_FP_EQ(inf, func(T(1.2345), negInf));
void testBothZero(FuncPtr func) {
EXPECT_FP_EQ(zero, func(zero, zero));
EXPECT_FP_EQ(zero, func(zero, negZero));
EXPECT_FP_EQ(zero, func(negZero, zero));
EXPECT_FP_EQ(zero, func(negZero, negZero));
void testInRange(FuncPtr func) {
constexpr UIntType count = 10000001;
constexpr UIntType step = UIntType(-1) / count;
for (UIntType i = 0, v = 0, w = UIntType(-1); i <= count;
++i, v += step, w -= step) {
T x = T(FPBits(v)), y = T(FPBits(w));
if (isnan(x) || isinf(x))
if (isnan(y) || isinf(y))
if (x > y) {
EXPECT_FP_EQ(x - y, func(x, y));
} else {
EXPECT_FP_EQ(zero, func(x, y));
// constexpr does not work on FPBits yet, so we cannot have these constants as
// static.
const T nan = T(__llvm_libc::fputil::FPBits<T>::buildNaN(1));
const T inf = T(__llvm_libc::fputil::FPBits<T>::inf());
const T negInf = T(__llvm_libc::fputil::FPBits<T>::negInf());
const T zero = T(__llvm_libc::fputil::FPBits<T>::zero());
const T negZero = T(__llvm_libc::fputil::FPBits<T>::negZero());