fdf20941a8
Add tests for signaling NaNs, and fix function behavior for handling signaling NaN input. Fixes https://github.com/llvm/llvm-project/issues/124812
59 lines
1.9 KiB
C++
59 lines
1.9 KiB
C++
//===-- Unittests for log2f -----------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "hdr/math_macros.h"
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#include "src/__support/FPUtil/FPBits.h"
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#include "src/errno/libc_errno.h"
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#include "src/math/log2f.h"
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#include "test/UnitTest/FPMatcher.h"
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#include "test/UnitTest/Test.h"
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#include <stdint.h>
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using LlvmLibcLog2fTest = LIBC_NAMESPACE::testing::FPTest<float>;
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TEST_F(LlvmLibcLog2fTest, SpecialNumbers) {
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EXPECT_FP_EQ_WITH_EXCEPTION(aNaN, LIBC_NAMESPACE::log2f(sNaN), FE_INVALID);
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EXPECT_MATH_ERRNO(0);
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EXPECT_FP_EQ(aNaN, LIBC_NAMESPACE::log2f(aNaN));
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EXPECT_FP_EQ(inf, LIBC_NAMESPACE::log2f(inf));
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EXPECT_FP_IS_NAN_WITH_EXCEPTION(LIBC_NAMESPACE::log2f(neg_inf), FE_INVALID);
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EXPECT_FP_EQ_WITH_EXCEPTION(neg_inf, LIBC_NAMESPACE::log2f(0.0f),
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FE_DIVBYZERO);
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EXPECT_FP_EQ_WITH_EXCEPTION(neg_inf, LIBC_NAMESPACE::log2f(-0.0f),
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FE_DIVBYZERO);
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EXPECT_FP_IS_NAN_WITH_EXCEPTION(LIBC_NAMESPACE::log2f(-1.0f), FE_INVALID);
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EXPECT_FP_EQ_ALL_ROUNDING(zero, LIBC_NAMESPACE::log2f(1.0f));
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}
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#ifdef LIBC_TEST_FTZ_DAZ
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using namespace LIBC_NAMESPACE::testing;
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TEST_F(LlvmLibcLog2fTest, FTZMode) {
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ModifyMXCSR mxcsr(FTZ);
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EXPECT_FP_EQ(-149.0f, LIBC_NAMESPACE::log2f(min_denormal));
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}
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TEST_F(LlvmLibcLog2fTest, DAZMode) {
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ModifyMXCSR mxcsr(DAZ);
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EXPECT_FP_EQ(FPBits::inf(Sign::NEG).get_val(),
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LIBC_NAMESPACE::log2f(min_denormal));
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}
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TEST_F(LlvmLibcLog2fTest, FTZDAZMode) {
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ModifyMXCSR mxcsr(FTZ | DAZ);
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EXPECT_FP_EQ(FPBits::inf(Sign::NEG).get_val(),
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LIBC_NAMESPACE::log2f(min_denormal));
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}
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#endif
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