| 1 | //===-- Unittests for atan ------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #include "src/math/atan.h" |
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| 10 | #include "test/UnitTest/FPMatcher.h" |
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| 11 | #include "test/UnitTest/Test.h" |
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| 12 | |
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| 13 | using LlvmLibcAtanTest = LIBC_NAMESPACE::testing::FPTest<double>; |
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| 14 | |
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| 15 | TEST_F(LlvmLibcAtanTest, SpecialNumbers) { |
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| 16 | EXPECT_FP_EQ_WITH_EXCEPTION(aNaN, LIBC_NAMESPACE::atan(sNaN), FE_INVALID); |
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| 17 | EXPECT_MATH_ERRNO(0); |
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| 18 | |
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| 19 | EXPECT_FP_EQ_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::atan(aNaN)); |
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| 20 | EXPECT_FP_EQ_ALL_ROUNDING(zero, LIBC_NAMESPACE::atan(zero)); |
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| 21 | EXPECT_FP_EQ_ALL_ROUNDING(neg_zero, LIBC_NAMESPACE::atan(neg_zero)); |
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| 22 | // atan(+-Inf) = +- pi/2. |
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| 23 | EXPECT_FP_EQ(0x1.921fb54442d18p0, LIBC_NAMESPACE::atan(inf)); |
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| 24 | EXPECT_FP_EQ(-0x1.921fb54442d18p0, LIBC_NAMESPACE::atan(neg_inf)); |
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| 25 | // atan(+-1) = +- pi/4. |
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| 26 | EXPECT_FP_EQ(0x1.921fb54442d18p-1, LIBC_NAMESPACE::atan(1.0)); |
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| 27 | EXPECT_FP_EQ(-0x1.921fb54442d18p-1, LIBC_NAMESPACE::atan(-1.0)); |
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| 28 | } |
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| 29 | |
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