| //===-- Unittests for tanhf -----------------------------------------------===// |
| // |
| // 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 "hdr/math_macros.h" |
| #include "src/__support/FPUtil/FPBits.h" |
| #include "src/errno/libc_errno.h" |
| #include "src/math/tanhf.h" |
| #include "test/UnitTest/FPMatcher.h" |
| #include "test/UnitTest/Test.h" |
| #include "utils/MPFRWrapper/MPFRUtils.h" |
| |
| #include <errno.h> |
| #include <stdint.h> |
| |
| using LlvmLibcTanhfTest = LIBC_NAMESPACE::testing::FPTest<float>; |
| |
| namespace mpfr = LIBC_NAMESPACE::testing::mpfr; |
| |
| TEST_F(LlvmLibcTanhfTest, SpecialNumbers) { |
| LIBC_NAMESPACE::libc_errno = 0; |
| |
| EXPECT_FP_EQ(aNaN, LIBC_NAMESPACE::tanhf(aNaN)); |
| EXPECT_MATH_ERRNO(0); |
| |
| EXPECT_FP_EQ(0.0f, LIBC_NAMESPACE::tanhf(0.0f)); |
| EXPECT_MATH_ERRNO(0); |
| |
| EXPECT_FP_EQ(-0.0f, LIBC_NAMESPACE::tanhf(-0.0f)); |
| EXPECT_MATH_ERRNO(0); |
| |
| EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::tanhf(inf)); |
| EXPECT_MATH_ERRNO(0); |
| |
| EXPECT_FP_EQ(-1.0f, LIBC_NAMESPACE::tanhf(neg_inf)); |
| EXPECT_MATH_ERRNO(0); |
| } |
| |
| TEST_F(LlvmLibcTanhfTest, InFloatRange) { |
| constexpr uint32_t COUNT = 100'001; |
| constexpr uint32_t STEP = UINT32_MAX / COUNT; |
| for (uint32_t i = 0, v = 0; i <= COUNT; ++i, v += STEP) { |
| float x = FPBits(v).get_val(); |
| if (isnan(x) || isinf(x)) |
| continue; |
| ASSERT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Tanh, x, |
| LIBC_NAMESPACE::tanhf(x), 0.5); |
| } |
| } |
| |
| TEST_F(LlvmLibcTanhfTest, ExceptionalValues) { |
| constexpr int N = 4; |
| constexpr uint32_t INPUTS[N] = { |
| 0x0040'0000, |
| 0x1780'0000, |
| 0x3a12'85ff, |
| 0x4058'e0a3, |
| }; |
| |
| for (int i = 0; i < N; ++i) { |
| float x = FPBits(INPUTS[i]).get_val(); |
| EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Tanh, x, |
| LIBC_NAMESPACE::tanhf(x), 0.5); |
| EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Tanh, -x, |
| LIBC_NAMESPACE::tanhf(-x), 0.5); |
| } |
| } |