| //===-- Unittests for fmax -----------------------------------------------===// |
| // |
| // 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 "include/math.h" |
| #include "src/math/fmax.h" |
| #include "utils/FPUtil/FPBits.h" |
| #include "utils/FPUtil/TestHelpers.h" |
| #include "utils/UnitTest/Test.h" |
| |
| using FPBits = __llvm_libc::fputil::FPBits<double>; |
| |
| double nan = FPBits::buildNaN(1); |
| double inf = FPBits::inf(); |
| double negInf = FPBits::negInf(); |
| |
| TEST(FmaxTest, NaNArg) { |
| EXPECT_FP_EQ(inf, __llvm_libc::fmax(nan, inf)); |
| EXPECT_FP_EQ(negInf, __llvm_libc::fmax(negInf, nan)); |
| EXPECT_FP_EQ(0.0, __llvm_libc::fmax(nan, 0.0)); |
| EXPECT_FP_EQ(-0.0, __llvm_libc::fmax(-0.0, nan)); |
| EXPECT_FP_EQ(-1.2345, __llvm_libc::fmax(nan, -1.2345)); |
| EXPECT_FP_EQ(1.2345, __llvm_libc::fmax(1.2345, nan)); |
| EXPECT_NE(isnan(__llvm_libc::fmax(nan, nan)), 0); |
| } |
| |
| TEST(FmaxTest, InfArg) { |
| EXPECT_FP_EQ(inf, __llvm_libc::fmax(negInf, inf)); |
| EXPECT_FP_EQ(inf, __llvm_libc::fmax(inf, 0.0)); |
| EXPECT_FP_EQ(inf, __llvm_libc::fmax(-0.0, inf)); |
| EXPECT_FP_EQ(inf, __llvm_libc::fmax(inf, 1.2345)); |
| EXPECT_FP_EQ(inf, __llvm_libc::fmax(-1.2345, inf)); |
| } |
| |
| TEST(FmaxTest, NegInfArg) { |
| EXPECT_FP_EQ(inf, __llvm_libc::fmax(inf, negInf)); |
| EXPECT_FP_EQ(0.0, __llvm_libc::fmax(negInf, 0.0)); |
| EXPECT_FP_EQ(-0.0, __llvm_libc::fmax(-0.0, negInf)); |
| EXPECT_FP_EQ(-1.2345, __llvm_libc::fmax(negInf, -1.2345)); |
| EXPECT_FP_EQ(1.2345, __llvm_libc::fmax(1.2345, negInf)); |
| } |
| |
| TEST(FmaxTest, BothZero) { |
| EXPECT_FP_EQ(0.0, __llvm_libc::fmax(0.0, 0.0)); |
| EXPECT_FP_EQ(0.0, __llvm_libc::fmax(-0.0, 0.0)); |
| EXPECT_FP_EQ(0.0, __llvm_libc::fmax(0.0, -0.0)); |
| EXPECT_FP_EQ(-0.0, __llvm_libc::fmax(-0.0, -0.0)); |
| } |
| |
| TEST(FmaxTest, InDoubleRange) { |
| using UIntType = FPBits::UIntType; |
| 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) { |
| double x = FPBits(v), y = FPBits(w); |
| if (isnan(x) || isinf(x)) |
| continue; |
| if (isnan(y) || isinf(y)) |
| continue; |
| if ((x == 0) && (y == 0)) |
| continue; |
| |
| if (x > y) { |
| EXPECT_FP_EQ(x, __llvm_libc::fmax(x, y)); |
| } else { |
| EXPECT_FP_EQ(y, __llvm_libc::fmax(x, y)); |
| } |
| } |
| } |