xref: /aosp_15_r20/external/llvm-libc/test/src/math/smoke/logf_test.cpp (revision 71db0c75aadcf003ffe3238005f61d7618a3fead)
1 //===-- Unittests for logf-----------------------------------------------===//
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/math/logf.h"
12 #include "test/UnitTest/FPMatcher.h"
13 #include "test/UnitTest/Test.h"
14 
15 #include <stdint.h>
16 
17 using LlvmLibcLogfTest = LIBC_NAMESPACE::testing::FPTest<float>;
18 
TEST_F(LlvmLibcLogfTest,SpecialNumbers)19 TEST_F(LlvmLibcLogfTest, SpecialNumbers) {
20   EXPECT_FP_EQ(aNaN, LIBC_NAMESPACE::logf(aNaN));
21   EXPECT_FP_EQ(inf, LIBC_NAMESPACE::logf(inf));
22   EXPECT_FP_IS_NAN_WITH_EXCEPTION(LIBC_NAMESPACE::logf(neg_inf), FE_INVALID);
23   EXPECT_FP_EQ_WITH_EXCEPTION(neg_inf, LIBC_NAMESPACE::logf(0.0f),
24                               FE_DIVBYZERO);
25   EXPECT_FP_EQ_WITH_EXCEPTION(neg_inf, LIBC_NAMESPACE::logf(-0.0f),
26                               FE_DIVBYZERO);
27   EXPECT_FP_IS_NAN_WITH_EXCEPTION(LIBC_NAMESPACE::logf(-1.0f), FE_INVALID);
28   EXPECT_FP_EQ_ALL_ROUNDING(zero, LIBC_NAMESPACE::logf(1.0f));
29 }
30 #ifdef LIBC_TEST_FTZ_DAZ
31 
32 using namespace LIBC_NAMESPACE::testing;
33 
TEST_F(LlvmLibcLogfTest,FTZMode)34 TEST_F(LlvmLibcLogfTest, FTZMode) {
35   ModifyMXCSR mxcsr(FTZ);
36 
37   EXPECT_FP_EQ(-0x1.9d1d9fccf477p6f, LIBC_NAMESPACE::logf(min_denormal));
38 }
39 
TEST_F(LlvmLibcLogfTest,DAZMode)40 TEST_F(LlvmLibcLogfTest, DAZMode) {
41   ModifyMXCSR mxcsr(DAZ);
42 
43   EXPECT_FP_EQ(FPBits::inf(Sign::NEG).get_val(),
44                LIBC_NAMESPACE::logf(min_denormal));
45 }
46 
TEST_F(LlvmLibcLogfTest,FTZDAZMode)47 TEST_F(LlvmLibcLogfTest, FTZDAZMode) {
48   ModifyMXCSR mxcsr(FTZ | DAZ);
49 
50   EXPECT_FP_EQ(FPBits::inf(Sign::NEG).get_val(),
51                LIBC_NAMESPACE::logf(min_denormal));
52 }
53 
54 #endif
55