1//===-- Unittests for acos ------------------------------------------------===//
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-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "hdr/fenv_macros.h"
10#include "src/__support/libc_errno.h"
11#include "src/math/acos.h"
12#include "test/UnitTest/FPMatcher.h"
13#include "test/UnitTest/Test.h"
14
15using LlvmLibcAcosTest = LIBC_NAMESPACE::testing::FPTest<double>;
16
17TEST_F(LlvmLibcAcosTest, SpecialNumbers) {
18 EXPECT_FP_EQ_WITH_EXCEPTION_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::acos(sNaN),
19 FE_INVALID);
20 EXPECT_FP_EQ_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::acos(aNaN));
21 EXPECT_FP_EQ(0x1.921fb54442d18p0, LIBC_NAMESPACE::acos(zero));
22 EXPECT_FP_EQ(0x1.921fb54442d18p0, LIBC_NAMESPACE::acos(neg_zero));
23
24 libc_errno = 0;
25 EXPECT_FP_EQ_WITH_EXCEPTION_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::acos(inf),
26 FE_INVALID);
27 EXPECT_MATH_ERRNO(EDOM);
28 EXPECT_FP_EQ_WITH_EXCEPTION_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::acos(neg_inf),
29 FE_INVALID);
30 EXPECT_MATH_ERRNO(EDOM);
31 EXPECT_FP_EQ_WITH_EXCEPTION_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::acos(2.0),
32 FE_INVALID);
33 EXPECT_MATH_ERRNO(EDOM);
34 EXPECT_FP_EQ_WITH_EXCEPTION_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::acos(-2.0),
35 FE_INVALID);
36 EXPECT_MATH_ERRNO(EDOM);
37 EXPECT_FP_EQ(zero, LIBC_NAMESPACE::acos(1.0));
38 EXPECT_FP_EQ(0x1.921fb54442d18p1, LIBC_NAMESPACE::acos(-1.0));
39 EXPECT_FP_EQ(0x1.921fb54442d18p0, LIBC_NAMESPACE::acos(0x1.0p-54));
40}
41
42#ifdef LIBC_TEST_FTZ_DAZ
43
44using namespace LIBC_NAMESPACE::testing;
45
46TEST_F(LlvmLibcAcosTest, FTZMode) {
47 ModifyMXCSR mxcsr(FTZ);
48
49 EXPECT_FP_EQ(0x1.921fb54442d18p0, LIBC_NAMESPACE::acos(min_denormal));
50}
51
52TEST_F(LlvmLibcAcosTest, DAZMode) {
53 ModifyMXCSR mxcsr(DAZ);
54
55 EXPECT_FP_EQ(0x1.921fb54442d18p0, LIBC_NAMESPACE::acos(min_denormal));
56}
57
58TEST_F(LlvmLibcAcosTest, FTZDAZMode) {
59 ModifyMXCSR mxcsr(FTZ | DAZ);
60
61 EXPECT_FP_EQ(0x1.921fb54442d18p0, LIBC_NAMESPACE::acos(min_denormal));
62}
63
64#endif
65

source code of libc/test/src/math/smoke/acos_test.cpp