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//===-- Unittests for log2 ------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "hdr/errno_macros.h"
#include "hdr/math_macros.h"
#include "hdr/stdint_proxy.h"
#include "src/__support/FPUtil/FPBits.h"
#include "src/math/log2.h"
#include "test/UnitTest/FPMatcher.h"
#include "test/UnitTest/Test.h"
using LlvmLibcLog2Test = LIBC_NAMESPACE::testing::FPTest<double>;
TEST_F(LlvmLibcLog2Test, SpecialNumbers) {
EXPECT_FP_EQ_WITH_EXCEPTION(aNaN, LIBC_NAMESPACE::log2(sNaN), FE_INVALID);
EXPECT_MATH_ERRNO(0);
EXPECT_FP_EQ(aNaN, LIBC_NAMESPACE::log2(aNaN));
EXPECT_FP_EQ(inf, LIBC_NAMESPACE::log2(inf));
EXPECT_MATH_ERRNO(0);
EXPECT_FP_IS_NAN_WITH_EXCEPTION(LIBC_NAMESPACE::log2(neg_inf), FE_INVALID);
EXPECT_MATH_ERRNO(EDOM);
EXPECT_FP_EQ_WITH_EXCEPTION(neg_inf, LIBC_NAMESPACE::log2(0.0), FE_DIVBYZERO);
EXPECT_MATH_ERRNO(ERANGE);
EXPECT_FP_EQ_WITH_EXCEPTION(neg_inf, LIBC_NAMESPACE::log2(-0.0),
FE_DIVBYZERO);
EXPECT_MATH_ERRNO(ERANGE);
EXPECT_FP_IS_NAN_WITH_EXCEPTION(LIBC_NAMESPACE::log2(-1.0), FE_INVALID);
EXPECT_MATH_ERRNO(EDOM);
EXPECT_FP_EQ_ALL_ROUNDING(zero, LIBC_NAMESPACE::log2(1.0));
}
#ifdef LIBC_TEST_FTZ_DAZ
using namespace LIBC_NAMESPACE::testing;
TEST_F(LlvmLibcLog2Test, FTZMode) {
ModifyMXCSR mxcsr(FTZ);
EXPECT_FP_EQ(-1074.0, LIBC_NAMESPACE::log2(min_denormal));
}
TEST_F(LlvmLibcLog2Test, DAZMode) {
ModifyMXCSR mxcsr(DAZ);
EXPECT_FP_EQ(FPBits::inf(Sign::NEG).get_val(),
LIBC_NAMESPACE::log2(min_denormal));
}
TEST_F(LlvmLibcLog2Test, FTZDAZMode) {
ModifyMXCSR mxcsr(FTZ | DAZ);
EXPECT_FP_EQ(FPBits::inf(Sign::NEG).get_val(),
LIBC_NAMESPACE::log2(min_denormal));
}
#endif
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