| //===-- Unittests for exp2m1f ---------------------------------------------===// |
| // |
| // 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/CPP/array.h" |
| #include "src/__support/FPUtil/FPBits.h" |
| #include "src/errno/libc_errno.h" |
| #include "src/math/exp2m1f.h" |
| #include "test/UnitTest/FPMatcher.h" |
| #include "test/UnitTest/Test.h" |
| #include "utils/MPFRWrapper/MPFRUtils.h" |
| |
| #include <stdint.h> |
| |
| using LlvmLibcExp2m1fTest = LIBC_NAMESPACE::testing::FPTest<float>; |
| |
| namespace mpfr = LIBC_NAMESPACE::testing::mpfr; |
| |
| TEST_F(LlvmLibcExp2m1fTest, TrickyInputs) { |
| constexpr LIBC_NAMESPACE::cpp::array<float, 10> INPUTS = { |
| // EXP2M1F_EXCEPTS_LO |
| 0x1.36dc8ep-36, |
| 0x1.224936p-19, |
| 0x1.d16d2p-20, |
| 0x1.17949ep-14, |
| -0x1.9c3e1ep-38, |
| -0x1.4d89b4p-32, |
| -0x1.a6eac4p-10, |
| -0x1.e7526ep-6, |
| // EXP2M1F_EXCEPTS_HI |
| 0x1.16a972p-1, |
| -0x1.9f12acp-5, |
| }; |
| |
| for (float x : INPUTS) { |
| LIBC_NAMESPACE::libc_errno = 0; |
| EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Exp2m1, x, |
| LIBC_NAMESPACE::exp2m1f(x), 0.5); |
| } |
| } |
| |
| TEST_F(LlvmLibcExp2m1fTest, InFloatRange) { |
| constexpr uint32_t COUNT = 100'000; |
| 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; |
| LIBC_NAMESPACE::libc_errno = 0; |
| float result = LIBC_NAMESPACE::exp2m1f(x); |
| |
| // If the computation resulted in an error or did not produce valid result |
| // in the single-precision floating point range, then ignore comparing with |
| // MPFR result as MPFR can still produce valid results because of its |
| // wider precision. |
| if (isnan(result) || isinf(result) || LIBC_NAMESPACE::libc_errno != 0) |
| continue; |
| ASSERT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Exp2m1, x, |
| LIBC_NAMESPACE::exp2m1f(x), 0.5); |
| } |
| } |