63 lines · cpp
1//===-- Unittests for log2 ------------------------------------------------===//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/log2.h"14#include "test/UnitTest/FPMatcher.h"15#include "test/UnitTest/Test.h"16 17using LlvmLibcLog2Test = LIBC_NAMESPACE::testing::FPTest<double>;18 19TEST_F(LlvmLibcLog2Test, SpecialNumbers) {20 EXPECT_FP_EQ_WITH_EXCEPTION(aNaN, LIBC_NAMESPACE::log2(sNaN), FE_INVALID);21 EXPECT_MATH_ERRNO(0);22 23 EXPECT_FP_EQ(aNaN, LIBC_NAMESPACE::log2(aNaN));24 EXPECT_FP_EQ(inf, LIBC_NAMESPACE::log2(inf));25 EXPECT_MATH_ERRNO(0);26 EXPECT_FP_IS_NAN_WITH_EXCEPTION(LIBC_NAMESPACE::log2(neg_inf), FE_INVALID);27 EXPECT_MATH_ERRNO(EDOM);28 EXPECT_FP_EQ_WITH_EXCEPTION(neg_inf, LIBC_NAMESPACE::log2(0.0), FE_DIVBYZERO);29 EXPECT_MATH_ERRNO(ERANGE);30 EXPECT_FP_EQ_WITH_EXCEPTION(neg_inf, LIBC_NAMESPACE::log2(-0.0),31 FE_DIVBYZERO);32 EXPECT_MATH_ERRNO(ERANGE);33 EXPECT_FP_IS_NAN_WITH_EXCEPTION(LIBC_NAMESPACE::log2(-1.0), FE_INVALID);34 EXPECT_MATH_ERRNO(EDOM);35 EXPECT_FP_EQ_ALL_ROUNDING(zero, LIBC_NAMESPACE::log2(1.0));36}37 38#ifdef LIBC_TEST_FTZ_DAZ39 40using namespace LIBC_NAMESPACE::testing;41 42TEST_F(LlvmLibcLog2Test, FTZMode) {43 ModifyMXCSR mxcsr(FTZ);44 45 EXPECT_FP_EQ(-1074.0, LIBC_NAMESPACE::log2(min_denormal));46}47 48TEST_F(LlvmLibcLog2Test, DAZMode) {49 ModifyMXCSR mxcsr(DAZ);50 51 EXPECT_FP_EQ(FPBits::inf(Sign::NEG).get_val(),52 LIBC_NAMESPACE::log2(min_denormal));53}54 55TEST_F(LlvmLibcLog2Test, FTZDAZMode) {56 ModifyMXCSR mxcsr(FTZ | DAZ);57 58 EXPECT_FP_EQ(FPBits::inf(Sign::NEG).get_val(),59 LIBC_NAMESPACE::log2(min_denormal));60}61 62#endif63