1//===-- Unittests for log2f -----------------------------------------------===//
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/__support/libc_errno.h"
12#include "src/math/log2f.h"
13#include "test/UnitTest/FPMatcher.h"
14#include "test/UnitTest/Test.h"
15
16#include <stdint.h>
17
18using LlvmLibcLog2fTest = LIBC_NAMESPACE::testing::FPTest<float>;
19
20TEST_F(LlvmLibcLog2fTest, SpecialNumbers) {
21 EXPECT_FP_EQ_WITH_EXCEPTION(aNaN, LIBC_NAMESPACE::log2f(sNaN), FE_INVALID);
22 EXPECT_MATH_ERRNO(0);
23
24 EXPECT_FP_EQ(aNaN, LIBC_NAMESPACE::log2f(aNaN));
25 EXPECT_FP_EQ(inf, LIBC_NAMESPACE::log2f(inf));
26 EXPECT_FP_IS_NAN_WITH_EXCEPTION(LIBC_NAMESPACE::log2f(neg_inf), FE_INVALID);
27 EXPECT_FP_EQ_WITH_EXCEPTION(neg_inf, LIBC_NAMESPACE::log2f(0.0f),
28 FE_DIVBYZERO);
29 EXPECT_FP_EQ_WITH_EXCEPTION(neg_inf, LIBC_NAMESPACE::log2f(-0.0f),
30 FE_DIVBYZERO);
31 EXPECT_FP_IS_NAN_WITH_EXCEPTION(LIBC_NAMESPACE::log2f(-1.0f), FE_INVALID);
32 EXPECT_FP_EQ_ALL_ROUNDING(zero, LIBC_NAMESPACE::log2f(1.0f));
33}
34#ifdef LIBC_TEST_FTZ_DAZ
35
36using namespace LIBC_NAMESPACE::testing;
37
38TEST_F(LlvmLibcLog2fTest, FTZMode) {
39 ModifyMXCSR mxcsr(FTZ);
40
41 EXPECT_FP_EQ(-149.0f, LIBC_NAMESPACE::log2f(min_denormal));
42}
43
44TEST_F(LlvmLibcLog2fTest, DAZMode) {
45 ModifyMXCSR mxcsr(DAZ);
46
47 EXPECT_FP_EQ(FPBits::inf(Sign::NEG).get_val(),
48 LIBC_NAMESPACE::log2f(min_denormal));
49}
50
51TEST_F(LlvmLibcLog2fTest, FTZDAZMode) {
52 ModifyMXCSR mxcsr(FTZ | DAZ);
53
54 EXPECT_FP_EQ(FPBits::inf(Sign::NEG).get_val(),
55 LIBC_NAMESPACE::log2f(min_denormal));
56}
57
58#endif
59

source code of libc/test/src/math/smoke/log2f_test.cpp