124 lines · cpp
1//===-- Unittests for exp10f ----------------------------------------------===//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/math_macros.h"10#include "src/__support/FPUtil/FPBits.h"11#include "src/__support/libc_errno.h"12#include "src/math/exp10f.h"13#include "test/UnitTest/FPMatcher.h"14#include "test/UnitTest/Test.h"15#include "utils/MPFRWrapper/MPFRUtils.h"16 17#include "hdr/stdint_proxy.h"18 19using LlvmLibcExp10fTest = LIBC_NAMESPACE::testing::FPTest<float>;20 21namespace mpfr = LIBC_NAMESPACE::testing::mpfr;22 23TEST_F(LlvmLibcExp10fTest, SpecialNumbers) {24 EXPECT_FP_EQ(aNaN, LIBC_NAMESPACE::exp10f(aNaN));25 EXPECT_MATH_ERRNO(0);26 27 EXPECT_FP_EQ(inf, LIBC_NAMESPACE::exp10f(inf));28 EXPECT_MATH_ERRNO(0);29 30 EXPECT_FP_EQ(0.0f, LIBC_NAMESPACE::exp10f(neg_inf));31 EXPECT_MATH_ERRNO(0);32 33 EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::exp10f(0.0f));34 EXPECT_MATH_ERRNO(0);35 36 EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::exp10f(-0.0f));37 EXPECT_MATH_ERRNO(0);38}39 40TEST_F(LlvmLibcExp10fTest, Overflow) {41 EXPECT_FP_EQ_WITH_EXCEPTION(42 inf, LIBC_NAMESPACE::exp10f(FPBits(0x7f7fffffU).get_val()), FE_OVERFLOW);43 EXPECT_MATH_ERRNO(ERANGE);44 45 EXPECT_FP_EQ_WITH_EXCEPTION(46 inf, LIBC_NAMESPACE::exp10f(FPBits(0x43000000U).get_val()), FE_OVERFLOW);47 EXPECT_MATH_ERRNO(ERANGE);48 49 EXPECT_FP_EQ_WITH_EXCEPTION(50 inf, LIBC_NAMESPACE::exp10f(FPBits(0x43000001U).get_val()), FE_OVERFLOW);51 EXPECT_MATH_ERRNO(ERANGE);52}53 54TEST_F(LlvmLibcExp10fTest, Underflow) {55 EXPECT_FP_EQ_WITH_EXCEPTION(56 0.0f, LIBC_NAMESPACE::exp10f(FPBits(0xff7fffffU).get_val()),57 FE_UNDERFLOW);58 EXPECT_MATH_ERRNO(ERANGE);59 60 float x = FPBits(0xc2cffff8U).get_val();61 EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Exp10, x,62 LIBC_NAMESPACE::exp10f(x), 0.5);63 EXPECT_MATH_ERRNO(ERANGE);64 65 x = FPBits(0xc2d00008U).get_val();66 EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Exp10, x,67 LIBC_NAMESPACE::exp10f(x), 0.5);68 EXPECT_MATH_ERRNO(ERANGE);69}70 71TEST_F(LlvmLibcExp10fTest, TrickyInputs) {72 constexpr int N = 20;73 constexpr uint32_t INPUTS[N] = {74 0x325e5bd8, // x = 0x1.bcb7bp-27f75 0x325e5bd9, // x = 0x1.bcb7b2p-27f76 0x325e5bda, // x = 0x1.bcb7b4p-27f77 0x3d14d956, // x = 0x1.29b2acp-5f78 0x4116498a, // x = 0x1.2c9314p3f79 0x4126f431, // x = 0x1.4de862p3f80 0x4187d13c, // x = 0x1.0fa278p4f81 0x4203e9da, // x = 0x1.07d3b4p5f82 0x420b5f5d, // x = 0x1.16bebap5f83 0x42349e35, // x = 0x1.693c6ap5f84 0x3f800000, // x = 1.0f85 0x40000000, // x = 2.0f86 0x40400000, // x = 3.0f87 0x40800000, // x = 4.0f88 0x40a00000, // x = 5.0f89 0x40c00000, // x = 6.0f90 0x40e00000, // x = 7.0f91 0x41000000, // x = 8.0f92 0x41100000, // x = 9.0f93 0x41200000, // x = 10.0f94 };95 for (int i = 0; i < N; ++i) {96 float x = FPBits(INPUTS[i]).get_val();97 EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Exp10, x,98 LIBC_NAMESPACE::exp10f(x), 0.5);99 EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Exp10, -x,100 LIBC_NAMESPACE::exp10f(-x), 0.5);101 }102}103 104TEST_F(LlvmLibcExp10fTest, InFloatRange) {105 constexpr uint32_t COUNT = 100'000;106 constexpr uint32_t STEP = UINT32_MAX / COUNT;107 for (uint32_t i = 0, v = 0; i <= COUNT; ++i, v += STEP) {108 float x = FPBits(v).get_val();109 if (FPBits(v).is_nan() || FPBits(v).is_inf())110 continue;111 libc_errno = 0;112 float result = LIBC_NAMESPACE::exp10f(x);113 114 // If the computation resulted in an error or did not produce valid result115 // in the single-precision floating point range, then ignore comparing with116 // MPFR result as MPFR can still produce valid results because of its117 // wider precision.118 if (FPBits(result).is_nan() || FPBits(result).is_inf() || libc_errno != 0)119 continue;120 ASSERT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Exp10, x,121 LIBC_NAMESPACE::exp10f(x), 0.5);122 }123}124