1//===-- Unittests for exp2f -----------------------------------------------===//
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/exp2f.h"
13#include "test/UnitTest/FPMatcher.h"
14#include "test/UnitTest/Test.h"
15
16#include <stdint.h>
17
18using LlvmLibcExp2fTest = LIBC_NAMESPACE::testing::FPTest<float>;
19
20TEST_F(LlvmLibcExp2fTest, SpecialNumbers) {
21 libc_errno = 0;
22
23 EXPECT_FP_EQ_WITH_EXCEPTION(aNaN, LIBC_NAMESPACE::exp2f(sNaN), FE_INVALID);
24 EXPECT_MATH_ERRNO(0);
25
26 EXPECT_FP_EQ_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::exp2f(aNaN));
27 EXPECT_MATH_ERRNO(0);
28
29 EXPECT_FP_EQ_ALL_ROUNDING(inf, LIBC_NAMESPACE::exp2f(inf));
30 EXPECT_MATH_ERRNO(0);
31
32 EXPECT_FP_EQ_ALL_ROUNDING(0.0f, LIBC_NAMESPACE::exp2f(neg_inf));
33 EXPECT_MATH_ERRNO(0);
34
35 EXPECT_FP_EQ_ALL_ROUNDING(1.0f, LIBC_NAMESPACE::exp2f(0.0f));
36 EXPECT_MATH_ERRNO(0);
37
38 EXPECT_FP_EQ_ALL_ROUNDING(1.0f, LIBC_NAMESPACE::exp2f(-0.0f));
39 EXPECT_MATH_ERRNO(0);
40
41 EXPECT_FP_EQ_ALL_ROUNDING(2.0f, LIBC_NAMESPACE::exp2f(1.0f));
42 EXPECT_FP_EQ_ALL_ROUNDING(0.5f, LIBC_NAMESPACE::exp2f(-1.0f));
43 EXPECT_FP_EQ_ALL_ROUNDING(4.0f, LIBC_NAMESPACE::exp2f(2.0f));
44 EXPECT_FP_EQ_ALL_ROUNDING(0.25f, LIBC_NAMESPACE::exp2f(-2.0f));
45}
46
47TEST_F(LlvmLibcExp2fTest, Overflow) {
48 libc_errno = 0;
49 EXPECT_FP_EQ_WITH_EXCEPTION(
50 inf, LIBC_NAMESPACE::exp2f(FPBits(0x7f7fffffU).get_val()), FE_OVERFLOW);
51 EXPECT_MATH_ERRNO(ERANGE);
52
53 EXPECT_FP_EQ_WITH_EXCEPTION(
54 inf, LIBC_NAMESPACE::exp2f(FPBits(0x43000000U).get_val()), FE_OVERFLOW);
55 EXPECT_MATH_ERRNO(ERANGE);
56
57 EXPECT_FP_EQ_WITH_EXCEPTION(
58 inf, LIBC_NAMESPACE::exp2f(FPBits(0x43000001U).get_val()), FE_OVERFLOW);
59 EXPECT_MATH_ERRNO(ERANGE);
60}
61
62#ifdef LIBC_TEST_FTZ_DAZ
63
64using namespace LIBC_NAMESPACE::testing;
65
66TEST_F(LlvmLibcExp2fTest, FTZMode) {
67 ModifyMXCSR mxcsr(FTZ);
68
69 EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::exp2f(min_denormal));
70 EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::exp2f(max_denormal));
71}
72
73TEST_F(LlvmLibcExp2fTest, DAZMode) {
74 ModifyMXCSR mxcsr(DAZ);
75
76 EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::exp2f(min_denormal));
77 EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::exp2f(max_denormal));
78}
79
80TEST_F(LlvmLibcExp2fTest, FTZDAZMode) {
81 ModifyMXCSR mxcsr(FTZ | DAZ);
82
83 EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::exp2f(min_denormal));
84 EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::exp2f(max_denormal));
85}
86
87#endif
88

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source code of libc/test/src/math/smoke/exp2f_test.cpp