d87eea35fa
This is the first step in preparation for: https://discourse.llvm.org/t/rfc-make-clang-builtin-math-functions-constexpr-with-llvm-libc-to-support-c-23-constexpr-math-functions/86450
59 lines
1.8 KiB
C++
59 lines
1.8 KiB
C++
//===-- 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/math_macros.h"
|
|
#include "src/__support/FPUtil/FPBits.h"
|
|
#include "src/__support/libc_errno.h"
|
|
#include "src/math/log2.h"
|
|
#include "test/UnitTest/FPMatcher.h"
|
|
#include "test/UnitTest/Test.h"
|
|
|
|
#include <stdint.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_FP_IS_NAN_WITH_EXCEPTION(LIBC_NAMESPACE::log2(neg_inf), FE_INVALID);
|
|
EXPECT_FP_EQ_WITH_EXCEPTION(neg_inf, LIBC_NAMESPACE::log2(0.0), FE_DIVBYZERO);
|
|
EXPECT_FP_EQ_WITH_EXCEPTION(neg_inf, LIBC_NAMESPACE::log2(-0.0),
|
|
FE_DIVBYZERO);
|
|
EXPECT_FP_IS_NAN_WITH_EXCEPTION(LIBC_NAMESPACE::log2(-1.0), FE_INVALID);
|
|
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
|