70 lines · cpp
1//===-- Unittests for 2^x -------------------------------------------------===//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/math/exp2.h"14#include "test/UnitTest/FPMatcher.h"15#include "test/UnitTest/Test.h"16 17using LlvmLibcExp2Test = LIBC_NAMESPACE::testing::FPTest<double>;18 19TEST_F(LlvmLibcExp2Test, SpecialNumbers) {20 EXPECT_FP_EQ_WITH_EXCEPTION(aNaN, LIBC_NAMESPACE::exp2(sNaN), FE_INVALID);21 EXPECT_MATH_ERRNO(0);22 23 EXPECT_FP_EQ(aNaN, LIBC_NAMESPACE::exp2(aNaN));24 EXPECT_MATH_ERRNO(0);25 EXPECT_FP_EQ(inf, LIBC_NAMESPACE::exp2(inf));26 EXPECT_MATH_ERRNO(0);27 EXPECT_FP_EQ_ALL_ROUNDING(zero, LIBC_NAMESPACE::exp2(neg_inf));28 EXPECT_MATH_ERRNO(0);29 30 EXPECT_FP_EQ_WITH_EXCEPTION(zero, LIBC_NAMESPACE::exp2(-0x1.0p20),31 FE_UNDERFLOW);32 EXPECT_MATH_ERRNO(ERANGE);33 EXPECT_FP_EQ_WITH_EXCEPTION(inf, LIBC_NAMESPACE::exp2(0x1.0p20), FE_OVERFLOW);34 EXPECT_MATH_ERRNO(ERANGE);35 36 EXPECT_FP_EQ_ALL_ROUNDING(1.0, LIBC_NAMESPACE::exp2(0.0));37 EXPECT_FP_EQ_ALL_ROUNDING(1.0, LIBC_NAMESPACE::exp2(-0.0));38 EXPECT_FP_EQ_ALL_ROUNDING(2.0, LIBC_NAMESPACE::exp2(1.0));39 EXPECT_FP_EQ_ALL_ROUNDING(0.5, LIBC_NAMESPACE::exp2(-1.0));40 EXPECT_FP_EQ_ALL_ROUNDING(4.0, LIBC_NAMESPACE::exp2(2.0));41 EXPECT_FP_EQ_ALL_ROUNDING(0.25, LIBC_NAMESPACE::exp2(-2.0));42}43 44#ifdef LIBC_TEST_FTZ_DAZ45 46using namespace LIBC_NAMESPACE::testing;47 48TEST_F(LlvmLibcExp2Test, FTZMode) {49 ModifyMXCSR mxcsr(FTZ);50 51 EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp2(min_denormal));52 EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp2(max_denormal));53}54 55TEST_F(LlvmLibcExp2Test, DAZMode) {56 ModifyMXCSR mxcsr(DAZ);57 58 EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp2(min_denormal));59 EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp2(max_denormal));60}61 62TEST_F(LlvmLibcExp2Test, FTZDAZMode) {63 ModifyMXCSR mxcsr(FTZ | DAZ);64 65 EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp2(min_denormal));66 EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp2(max_denormal));67}68 69#endif70