1 //===-- Unittests for atan2 -----------------------------------------------===//
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 "src/math/atan2.h"
10 #include "test/UnitTest/FPMatcher.h"
11 #include "test/UnitTest/Test.h"
12
13 using LlvmLibcAtan2Test = LIBC_NAMESPACE::testing::FPTest<double>;
14
TEST_F(LlvmLibcAtan2Test,SpecialNumbers)15 TEST_F(LlvmLibcAtan2Test, SpecialNumbers) {
16 EXPECT_FP_EQ_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::atan2(aNaN, zero));
17 EXPECT_FP_EQ_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::atan2(1.0, aNaN));
18 EXPECT_FP_EQ_ALL_ROUNDING(0.0, LIBC_NAMESPACE::atan2(zero, zero));
19 EXPECT_FP_EQ_ALL_ROUNDING(-0.0, LIBC_NAMESPACE::atan2(-0.0, zero));
20 EXPECT_FP_EQ_ALL_ROUNDING(0.0, LIBC_NAMESPACE::atan2(1.0, inf));
21 EXPECT_FP_EQ_ALL_ROUNDING(-0.0, LIBC_NAMESPACE::atan2(-1.0, inf));
22 }
23
24 #ifdef LIBC_TEST_FTZ_DAZ
25
26 using namespace LIBC_NAMESPACE::testing;
27
TEST_F(LlvmLibcAtan2Test,FTZMode)28 TEST_F(LlvmLibcAtan2Test, FTZMode) {
29 ModifyMXCSR mxcsr(FTZ);
30
31 EXPECT_FP_EQ(0x1.921fb54442d18p-1,
32 LIBC_NAMESPACE::atan2(min_denormal, min_denormal));
33 EXPECT_FP_EQ(0x1.0000000000001p-52,
34 LIBC_NAMESPACE::atan2(min_denormal, max_denormal));
35 EXPECT_FP_EQ(0x1.921fb54442d17p0,
36 LIBC_NAMESPACE::atan2(max_denormal, min_denormal));
37 EXPECT_FP_EQ(0x1.921fb54442d18p-1,
38 LIBC_NAMESPACE::atan2(max_denormal, max_denormal));
39 }
40
TEST_F(LlvmLibcAtan2Test,DAZMode)41 TEST_F(LlvmLibcAtan2Test, DAZMode) {
42 ModifyMXCSR mxcsr(DAZ);
43
44 EXPECT_FP_EQ(0.0, LIBC_NAMESPACE::atan2(min_denormal, min_denormal));
45 EXPECT_FP_EQ(0.0, LIBC_NAMESPACE::atan2(min_denormal, max_denormal));
46 EXPECT_FP_EQ(0.0, LIBC_NAMESPACE::atan2(max_denormal, min_denormal));
47 EXPECT_FP_EQ(0.0, LIBC_NAMESPACE::atan2(max_denormal, max_denormal));
48 }
49
TEST_F(LlvmLibcAtan2Test,FTZDAZMode)50 TEST_F(LlvmLibcAtan2Test, FTZDAZMode) {
51 ModifyMXCSR mxcsr(FTZ | DAZ);
52
53 EXPECT_FP_EQ(0.0, LIBC_NAMESPACE::atan2(min_denormal, min_denormal));
54 EXPECT_FP_EQ(0.0, LIBC_NAMESPACE::atan2(min_denormal, max_denormal));
55 EXPECT_FP_EQ(0.0, LIBC_NAMESPACE::atan2(max_denormal, min_denormal));
56 EXPECT_FP_EQ(0.0, LIBC_NAMESPACE::atan2(max_denormal, max_denormal));
57 }
58
59 #endif
60