29 lines · cpp
1//===-- Unittests for atan ------------------------------------------------===//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 "src/math/atan.h"10#include "test/UnitTest/FPMatcher.h"11#include "test/UnitTest/Test.h"12 13using LlvmLibcAtanTest = LIBC_NAMESPACE::testing::FPTest<double>;14 15TEST_F(LlvmLibcAtanTest, SpecialNumbers) {16 EXPECT_FP_EQ_WITH_EXCEPTION(aNaN, LIBC_NAMESPACE::atan(sNaN), FE_INVALID);17 EXPECT_MATH_ERRNO(0);18 19 EXPECT_FP_EQ_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::atan(aNaN));20 EXPECT_FP_EQ_ALL_ROUNDING(zero, LIBC_NAMESPACE::atan(zero));21 EXPECT_FP_EQ_ALL_ROUNDING(neg_zero, LIBC_NAMESPACE::atan(neg_zero));22 // atan(+-Inf) = +- pi/2.23 EXPECT_FP_EQ(0x1.921fb54442d18p0, LIBC_NAMESPACE::atan(inf));24 EXPECT_FP_EQ(-0x1.921fb54442d18p0, LIBC_NAMESPACE::atan(neg_inf));25 // atan(+-1) = +- pi/4.26 EXPECT_FP_EQ(0x1.921fb54442d18p-1, LIBC_NAMESPACE::atan(1.0));27 EXPECT_FP_EQ(-0x1.921fb54442d18p-1, LIBC_NAMESPACE::atan(-1.0));28}29