138 lines · cpp
1//===-- Unittests for tanf ------------------------------------------------===//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 "src/__support/FPUtil/FPBits.h"12#include "src/__support/macros/optimization.h"13#include "src/math/tanf.h"14#include "test/UnitTest/FPMatcher.h"15#include "test/UnitTest/Test.h"16#include "test/src/math/sdcomp26094.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 25#include "hdr/stdint_proxy.h"26 27using LlvmLibcTanfTest = LIBC_NAMESPACE::testing::FPTest<float>;28 29using LIBC_NAMESPACE::testing::SDCOMP26094_VALUES;30 31namespace mpfr = LIBC_NAMESPACE::testing::mpfr;32 33TEST_F(LlvmLibcTanfTest, SpecialNumbers) {34 EXPECT_FP_EQ(aNaN, LIBC_NAMESPACE::tanf(aNaN));35 EXPECT_MATH_ERRNO(0);36 37 EXPECT_FP_EQ(0.0f, LIBC_NAMESPACE::tanf(0.0f));38 EXPECT_MATH_ERRNO(0);39 40 EXPECT_FP_EQ(-0.0f, LIBC_NAMESPACE::tanf(-0.0f));41 EXPECT_MATH_ERRNO(0);42 43 EXPECT_FP_EQ(aNaN, LIBC_NAMESPACE::tanf(inf));44 EXPECT_MATH_ERRNO(EDOM);45 46 EXPECT_FP_EQ(aNaN, LIBC_NAMESPACE::tanf(neg_inf));47 EXPECT_MATH_ERRNO(EDOM);48}49 50TEST_F(LlvmLibcTanfTest, InFloatRange) {51 constexpr uint32_t COUNT = 100'000;52 constexpr uint32_t STEP = UINT32_MAX / COUNT;53 for (uint32_t i = 0, v = 0; i <= COUNT; ++i, v += STEP) {54 float x = FPBits(v).get_val();55 if (FPBits(v).is_nan() || FPBits(v).is_inf())56 continue;57 ASSERT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Tan, x,58 LIBC_NAMESPACE::tanf(x), 0.5);59 }60}61 62TEST_F(LlvmLibcTanfTest, SpecificBitPatterns) {63 constexpr int N = 54;64 constexpr uint32_t INPUTS[N] = {65 0x3a7a'8d2fU, // x = 0x1.f51a5ep-11f66 0x3f06'0a92U, // x = pi/667 0x3f3a'dc51U, // x = 0x1.75b8a2p-1f68 0x3f49'0fdbU, // x = pi/469 0x3f86'0a92U, // x = pi/370 0x3f8a'1f62U, // x = 0x1.143ec4p+0f71 0x3fa7'832aU, // x = 0x1.4f0654p+0f72 0x3fc9'0fdbU, // x = pi/273 0x4017'1973U, // x = 0x1.2e32e6p+1f74 0x4049'0fdbU, // x = pi75 0x4096'cbe4U, // x = 0x1.2d97c8p+2f76 0x40c9'0fdbU, // x = 2*pi77 0x433b'7490U, // x = 0x1.76e92p+7f78 0x437c'e5f1U, // x = 0x1.f9cbe2p+7f79 0x4619'9998U, // x = 0x1.33333p+13f80 0x474d'246fU, // x = 0x1.9a48dep+15f81 0x4afd'ece4U, // x = 0x1.fbd9c8p+22f82 0x4c23'32e9U, // x = 0x1.4665d2p+25f83 0x4d56'd355U, // x = 0x1.ada6aap+27f84 0x5043'1032U, // x = 0x1.862064p+33f85 0x50a3'e87fU, // x = 0x1.47d0fep+34f86 0x5239'47f6U, // x = 0x1.728fecp+37f87 0x531d'744cU, // x = 0x1.3ae898p+39f88 0x53b1'46a6U, // x = 0x1.628d4cp+40f89 0x5532'5019U, // x = 0x1.64a032p+43f90 0x55ca'fb2aU, // x = 0x1.95f654p+44f91 0x57d7'b0edU, // x = 0x1.af61dap+48f92 0x588e'f060U, // x = 0x1.1de0cp+50f93 0x5922'aa80U, // x = 0x1.4555p+51f94 0x5980'445eU, // x = 0x1.0088bcp+52f95 0x5aa4'542cU, // x = 0x1.48a858p+54f96 0x5c07'bcd0U, // x = 0x1.0f79ap+57f97 0x5ebc'fddeU, // x = 0x1.79fbbcp+62f98 0x5f18'b878U, // x = 0x1.3170fp+63f99 0x5fa6'eba7U, // x = 0x1.4dd74ep+64f100 0x6115'cb11U, // x = 0x1.2b9622p+67f101 0x61a4'0b40U, // x = 0x1.48168p+68f102 0x6386'134eU, // x = 0x1.0c269cp+72f103 0x63fc'86feU, // x = 0x1.f90dfcp+72f104 0x6589'8498U, // x = 0x1.13093p+76f105 0x65ee'8695U, // x = 0x1.dd0d2ap+76f106 0x6600'0001U, // x = 0x1.000002p+77f107 0x664e'46e4U, // x = 0x1.9c8dc8p+77f108 0x66b0'14aaU, // x = 0x1.602954p+78f109 0x6798'fe4fU, // x = 0x1.31fc9ep+80f110 0x67a9'242bU, // x = 0x1.524856p+80f111 0x6a19'76f1U, // x = 0x1.32ede2p+85f112 0x6ad3'6709U, // x = 0x1.a6ce12p+86f113 0x6c55'da58U, // x = 0x1.abb4bp+89f114 0x6f79'be45U, // x = 0x1.f37c8ap+95f115 0x7276'69d4U, // x = 0x1.ecd3a8p+101f116 0x72b5'05bbU, // x = 0x1.6a0b76p+102f117 0x7758'4625U, // x = 0x1.b08c4ap+111f118 0x7bee'f5efU, // x = 0x1.ddebdep+120f119 };120 121 for (int i = 0; i < N; ++i) {122 float x = FPBits(INPUTS[i]).get_val();123 EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Tan, x,124 LIBC_NAMESPACE::tanf(x), TOLERANCE + 0.5);125 EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Tan, -x,126 LIBC_NAMESPACE::tanf(-x), TOLERANCE + 0.5);127 }128}129 130// SDCOMP-26094: check tanf in the cases for which the range reducer131// returns values furthest beyond its nominal upper bound of pi/4.132TEST_F(LlvmLibcTanfTest, SDCOMP_26094) {133 for (uint32_t v : SDCOMP26094_VALUES) {134 float x = FPBits(v).get_val();135 ASSERT_MPFR_MATCH(mpfr::Operation::Tan, x, LIBC_NAMESPACE::tanf(x), 0.5);136 }137}138