1 //===-- Unittests for log1p -----------------------------------------------===//
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/math_macros.h"
10 #include "src/__support/FPUtil/FPBits.h"
11 #include "src/errno/libc_errno.h"
12 #include "src/math/log1p.h"
13 #include "test/UnitTest/FPMatcher.h"
14 #include "test/UnitTest/Test.h"
15
16 using LlvmLibcLog1pTest = LIBC_NAMESPACE::testing::FPTest<double>;
17
TEST_F(LlvmLibcLog1pTest,SpecialNumbers)18 TEST_F(LlvmLibcLog1pTest, SpecialNumbers) {
19 EXPECT_FP_EQ(aNaN, LIBC_NAMESPACE::log1p(aNaN));
20 EXPECT_FP_EQ(inf, LIBC_NAMESPACE::log1p(inf));
21 EXPECT_FP_IS_NAN_WITH_EXCEPTION(LIBC_NAMESPACE::log1p(neg_inf), FE_INVALID);
22 EXPECT_FP_IS_NAN_WITH_EXCEPTION(LIBC_NAMESPACE::log1p(-2.0), FE_INVALID);
23 EXPECT_FP_EQ(zero, LIBC_NAMESPACE::log1p(0.0));
24 EXPECT_FP_EQ(neg_zero, LIBC_NAMESPACE::log1p(-0.0));
25 EXPECT_FP_EQ_WITH_EXCEPTION(neg_inf, LIBC_NAMESPACE::log1p(-1.0),
26 FE_DIVBYZERO);
27
28 EXPECT_FP_EQ(0x1.62c829bf8fd9dp9,
29 LIBC_NAMESPACE::log1p(0x1.9b536cac3a09dp1023));
30 }
31
32 #ifdef LIBC_TEST_FTZ_DAZ
33
34 using namespace LIBC_NAMESPACE::testing;
35
TEST_F(LlvmLibcLog1pTest,FTZMode)36 TEST_F(LlvmLibcLog1pTest, FTZMode) {
37 ModifyMXCSR mxcsr(FTZ);
38
39 EXPECT_FP_EQ(0.0, LIBC_NAMESPACE::log1p(min_denormal));
40 EXPECT_FP_EQ(0x1.62c829bf8fd9dp9,
41 LIBC_NAMESPACE::log1p(0x1.9b536cac3a09dp1023));
42 }
43
TEST_F(LlvmLibcLog1pTest,DAZMode)44 TEST_F(LlvmLibcLog1pTest, DAZMode) {
45 ModifyMXCSR mxcsr(DAZ);
46
47 EXPECT_FP_EQ(0.0, LIBC_NAMESPACE::log1p(min_denormal));
48 EXPECT_FP_EQ(0x1.62c829bf8fd9dp9,
49 LIBC_NAMESPACE::log1p(0x1.9b536cac3a09dp1023));
50 }
51
TEST_F(LlvmLibcLog1pTest,FTZDAZMode)52 TEST_F(LlvmLibcLog1pTest, FTZDAZMode) {
53 ModifyMXCSR mxcsr(FTZ | DAZ);
54
55 EXPECT_FP_EQ(0.0, LIBC_NAMESPACE::log1p(min_denormal));
56 EXPECT_FP_EQ(0x1.62c829bf8fd9dp9,
57 LIBC_NAMESPACE::log1p(0x1.9b536cac3a09dp1023));
58 }
59
60 #endif
61