1 //===-- Unittests for log10 -----------------------------------------------===//
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/log10.h"
13 #include "test/UnitTest/FPMatcher.h"
14 #include "test/UnitTest/Test.h"
15
16 #include <stdint.h>
17
18 using LlvmLibcLog10Test = LIBC_NAMESPACE::testing::FPTest<double>;
19
TEST_F(LlvmLibcLog10Test,SpecialNumbers)20 TEST_F(LlvmLibcLog10Test, SpecialNumbers) {
21 EXPECT_FP_EQ(aNaN, LIBC_NAMESPACE::log10(aNaN));
22 EXPECT_FP_EQ(inf, LIBC_NAMESPACE::log10(inf));
23 EXPECT_FP_IS_NAN_WITH_EXCEPTION(LIBC_NAMESPACE::log10(neg_inf), FE_INVALID);
24 EXPECT_FP_EQ_WITH_EXCEPTION(neg_inf, LIBC_NAMESPACE::log10(0.0),
25 FE_DIVBYZERO);
26 EXPECT_FP_EQ_WITH_EXCEPTION(neg_inf, LIBC_NAMESPACE::log10(-0.0),
27 FE_DIVBYZERO);
28 EXPECT_FP_IS_NAN_WITH_EXCEPTION(LIBC_NAMESPACE::log10(-1.0), FE_INVALID);
29 EXPECT_FP_EQ_ALL_ROUNDING(zero, LIBC_NAMESPACE::log10(1.0));
30
31 double x = 1.0;
32 for (int i = 0; i < 11; ++i, x *= 10.0) {
33 EXPECT_FP_EQ_ALL_ROUNDING(static_cast<double>(i), LIBC_NAMESPACE::log10(x));
34 }
35 }
36
37 #ifdef LIBC_TEST_FTZ_DAZ
38
39 using namespace LIBC_NAMESPACE::testing;
40
TEST_F(LlvmLibcLog10Test,FTZMode)41 TEST_F(LlvmLibcLog10Test, FTZMode) {
42 ModifyMXCSR mxcsr(FTZ);
43
44 EXPECT_FP_EQ(-0x1.434e6420f4374p8, LIBC_NAMESPACE::log10(min_denormal));
45 }
46
TEST_F(LlvmLibcLog10Test,DAZMode)47 TEST_F(LlvmLibcLog10Test, DAZMode) {
48 ModifyMXCSR mxcsr(DAZ);
49
50 EXPECT_FP_EQ(FPBits::inf(Sign::NEG).get_val(),
51 LIBC_NAMESPACE::log10(min_denormal));
52 }
53
TEST_F(LlvmLibcLog10Test,FTZDAZMode)54 TEST_F(LlvmLibcLog10Test, FTZDAZMode) {
55 ModifyMXCSR mxcsr(FTZ | DAZ);
56
57 EXPECT_FP_EQ(FPBits::inf(Sign::NEG).get_val(),
58 LIBC_NAMESPACE::log10(min_denormal));
59 }
60
61 #endif
62