1 //===-- Unittests for tanhf -----------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "hdr/math_macros.h" 10 #include "src/__support/FPUtil/FPBits.h" 11 #include "src/errno/libc_errno.h" 12 #include "src/math/tanhf.h" 13 #include "test/UnitTest/FPMatcher.h" 14 #include "test/UnitTest/Test.h" 15 #include "utils/MPFRWrapper/MPFRUtils.h" 16 17 #include <stdint.h> 18 19 using LlvmLibcTanhfTest = LIBC_NAMESPACE::testing::FPTest<float>; 20 21 namespace mpfr = LIBC_NAMESPACE::testing::mpfr; 22 23 TEST_F(LlvmLibcTanhfTest, SpecialNumbers) { 24 LIBC_NAMESPACE::libc_errno = 0; 25 26 EXPECT_FP_EQ(aNaN, LIBC_NAMESPACE::tanhf(aNaN)); 27 EXPECT_MATH_ERRNO(0); 28 29 EXPECT_FP_EQ(0.0f, LIBC_NAMESPACE::tanhf(0.0f)); 30 EXPECT_MATH_ERRNO(0); 31 32 EXPECT_FP_EQ(-0.0f, LIBC_NAMESPACE::tanhf(-0.0f)); 33 EXPECT_MATH_ERRNO(0); 34 35 EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::tanhf(inf)); 36 EXPECT_MATH_ERRNO(0); 37 38 EXPECT_FP_EQ(-1.0f, LIBC_NAMESPACE::tanhf(neg_inf)); 39 EXPECT_MATH_ERRNO(0); 40 } 41 42 TEST_F(LlvmLibcTanhfTest, InFloatRange) { 43 constexpr uint32_t COUNT = 100'001; 44 constexpr uint32_t STEP = UINT32_MAX / COUNT; 45 for (uint32_t i = 0, v = 0; i <= COUNT; ++i, v += STEP) { 46 float x = FPBits(v).get_val(); 47 if (FPBits(v).is_nan() || FPBits(v).is_inf()) 48 continue; 49 ASSERT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Tanh, x, 50 LIBC_NAMESPACE::tanhf(x), 0.5); 51 } 52 } 53 54 TEST_F(LlvmLibcTanhfTest, ExceptionalValues) { 55 constexpr int N = 4; 56 constexpr uint32_t INPUTS[N] = { 57 0x0040'0000, 58 0x1780'0000, 59 0x3a12'85ff, 60 0x4058'e0a3, 61 }; 62 63 for (int i = 0; i < N; ++i) { 64 float x = FPBits(INPUTS[i]).get_val(); 65 EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Tanh, x, 66 LIBC_NAMESPACE::tanhf(x), 0.5); 67 EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Tanh, -x, 68 LIBC_NAMESPACE::tanhf(-x), 0.5); 69 } 70 } 71