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//===-- Unittests for atan2 -----------------------------------------------===//
//
// 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 "src/math/atan2.h"
#include "test/UnitTest/FPMatcher.h"
#include "test/UnitTest/Test.h"
using LlvmLibcAtan2Test = LIBC_NAMESPACE::testing::FPTest<double>;
TEST_F(LlvmLibcAtan2Test, SpecialNumbers) {
EXPECT_FP_EQ_WITH_EXCEPTION(aNaN, LIBC_NAMESPACE::atan2(sNaN, sNaN),
FE_INVALID);
EXPECT_MATH_ERRNO(0);
EXPECT_FP_EQ_WITH_EXCEPTION(aNaN, LIBC_NAMESPACE::atan2(sNaN, 1.0),
FE_INVALID);
EXPECT_MATH_ERRNO(0);
EXPECT_FP_EQ_WITH_EXCEPTION(aNaN, LIBC_NAMESPACE::atan2(1.0, sNaN),
FE_INVALID);
EXPECT_MATH_ERRNO(0);
EXPECT_FP_EQ_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::atan2(aNaN, zero));
EXPECT_FP_EQ_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::atan2(1.0, aNaN));
EXPECT_FP_EQ_ALL_ROUNDING(0.0, LIBC_NAMESPACE::atan2(zero, zero));
EXPECT_FP_EQ_ALL_ROUNDING(-0.0, LIBC_NAMESPACE::atan2(-0.0, zero));
EXPECT_FP_EQ_ALL_ROUNDING(0.0, LIBC_NAMESPACE::atan2(1.0, inf));
EXPECT_FP_EQ_ALL_ROUNDING(-0.0, LIBC_NAMESPACE::atan2(-1.0, inf));
}
#ifdef LIBC_TEST_FTZ_DAZ
using namespace LIBC_NAMESPACE::testing;
TEST_F(LlvmLibcAtan2Test, FTZMode) {
ModifyMXCSR mxcsr(FTZ);
EXPECT_FP_EQ(0x1.921fb54442d18p-1,
LIBC_NAMESPACE::atan2(min_denormal, min_denormal));
EXPECT_FP_EQ(0x1.0000000000001p-52,
LIBC_NAMESPACE::atan2(min_denormal, max_denormal));
EXPECT_FP_EQ(0x1.921fb54442d17p0,
LIBC_NAMESPACE::atan2(max_denormal, min_denormal));
EXPECT_FP_EQ(0x1.921fb54442d18p-1,
LIBC_NAMESPACE::atan2(max_denormal, max_denormal));
}
TEST_F(LlvmLibcAtan2Test, DAZMode) {
ModifyMXCSR mxcsr(DAZ);
EXPECT_FP_EQ(0.0, LIBC_NAMESPACE::atan2(min_denormal, min_denormal));
EXPECT_FP_EQ(0.0, LIBC_NAMESPACE::atan2(min_denormal, max_denormal));
EXPECT_FP_EQ(0.0, LIBC_NAMESPACE::atan2(max_denormal, min_denormal));
EXPECT_FP_EQ(0.0, LIBC_NAMESPACE::atan2(max_denormal, max_denormal));
}
TEST_F(LlvmLibcAtan2Test, FTZDAZMode) {
ModifyMXCSR mxcsr(FTZ | DAZ);
EXPECT_FP_EQ(0.0, LIBC_NAMESPACE::atan2(min_denormal, min_denormal));
EXPECT_FP_EQ(0.0, LIBC_NAMESPACE::atan2(min_denormal, max_denormal));
EXPECT_FP_EQ(0.0, LIBC_NAMESPACE::atan2(max_denormal, min_denormal));
EXPECT_FP_EQ(0.0, LIBC_NAMESPACE::atan2(max_denormal, max_denormal));
}
#endif
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