87 lines · cpp
1//===-- Unittests for acosf -----------------------------------------------===//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-exception6//7//===----------------------------------------------------------------------===//8 9#include "hdr/errno_macros.h"10#include "hdr/math_macros.h"11#include "hdr/stdint_proxy.h"12#include "src/__support/FPUtil/FPBits.h"13#include "src/__support/macros/optimization.h"14#include "src/math/acosf.h"15#include "test/UnitTest/FPMatcher.h"16#include "test/UnitTest/Test.h"17#include "utils/MPFRWrapper/MPFRUtils.h"18 19#ifdef LIBC_MATH_HAS_SKIP_ACCURATE_PASS20#define TOLERANCE 121#else22#define TOLERANCE 023#endif // LIBC_MATH_HAS_SKIP_ACCURATE_PASS24 25namespace mpfr = LIBC_NAMESPACE::testing::mpfr;26 27using LlvmLibcAcosfTest = LIBC_NAMESPACE::testing::FPTest<float>;28 29TEST_F(LlvmLibcAcosfTest, SpecialNumbers) {30 EXPECT_FP_EQ_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::acosf(aNaN));31 EXPECT_MATH_ERRNO(0);32 33 EXPECT_FP_EQ_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::acosf(inf));34 EXPECT_MATH_ERRNO(EDOM);35 36 EXPECT_FP_EQ_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::acosf(neg_inf));37 EXPECT_MATH_ERRNO(EDOM);38 39 EXPECT_FP_EQ_ALL_ROUNDING(zero, LIBC_NAMESPACE::acosf(1.0f));40 EXPECT_MATH_ERRNO(0);41 42 EXPECT_FP_EQ_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::acosf(2.0f));43 EXPECT_MATH_ERRNO(EDOM);44 45 EXPECT_FP_EQ_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::acosf(-2.0f));46 EXPECT_MATH_ERRNO(EDOM);47}48 49TEST_F(LlvmLibcAcosfTest, InFloatRange) {50 constexpr uint32_t COUNT = 100'000;51 constexpr uint32_t STEP = UINT32_MAX / COUNT;52 for (uint32_t i = 0, v = 0; i <= COUNT; ++i, v += STEP) {53 float x = FPBits(v).get_val();54 if (FPBits(v).is_nan() || FPBits(v).is_inf())55 continue;56 ASSERT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Acos, x,57 LIBC_NAMESPACE::acosf(x), 0.5);58 }59}60 61TEST_F(LlvmLibcAcosfTest, SpecificBitPatterns) {62 constexpr int N = 13;63 constexpr uint32_t INPUTS[N] = {64 0x3f000000, // x = 0.5f65 0x3f3504f3, // x = sqrt(2)/2, FE_DOWNWARD66 0x3f3504f4, // x = sqrt(2)/2, FE_UPWARD67 0x3f5db3d7, // x = sqrt(3)/2, FE_DOWNWARD68 0x3f5db3d8, // x = sqrt(3)/2, FE_UPWARD69 0x3f800000, // x = 1.0f70 0x40000000, // x = 2.0f71 0x328885a3, // x = 0x1.110b46p-2672 0x39826222, // x = 0x1.04c444p-1273 0x3d09bf86, // x = 0x1.137f0cp-5f74 0x3de5fa1e, // x = 0x1.cbf43cp-4f75 0x3f083a1a, // x = 0x1.107434p-1f76 0x3f7741b6, // x = 0x1.ee836cp-1f77 };78 79 for (int i = 0; i < N; ++i) {80 float x = FPBits(INPUTS[i]).get_val();81 EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Acos, x,82 LIBC_NAMESPACE::acosf(x), TOLERANCE + 0.5);83 EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Acos, -x,84 LIBC_NAMESPACE::acosf(-x), TOLERANCE + 0.5);85 }86}87