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/macros/properties/cpu_features.h" // LIBC_TARGET_CPU_HAS_FMA
12#include "src/errno/libc_errno.h"
13#include "src/math/exp2f.h"
14#include "test/UnitTest/FPMatcher.h"
15#include "test/UnitTest/Test.h"
16
17#include <stdint.h>
18
19using LlvmLibcExp2fTest = LIBC_NAMESPACE::testing::FPTest<float>;
20
21TEST_F(LlvmLibcExp2fTest, SpecialNumbers) {
22 LIBC_NAMESPACE::libc_errno = 0;
23
24 EXPECT_FP_EQ_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::exp2f(aNaN));
25 EXPECT_MATH_ERRNO(0);
26
27 EXPECT_FP_EQ_ALL_ROUNDING(inf, LIBC_NAMESPACE::exp2f(inf));
28 EXPECT_MATH_ERRNO(0);
29
30 EXPECT_FP_EQ_ALL_ROUNDING(0.0f, LIBC_NAMESPACE::exp2f(neg_inf));
31 EXPECT_MATH_ERRNO(0);
32
33 EXPECT_FP_EQ_ALL_ROUNDING(1.0f, LIBC_NAMESPACE::exp2f(0.0f));
34 EXPECT_MATH_ERRNO(0);
35
36 EXPECT_FP_EQ_ALL_ROUNDING(1.0f, LIBC_NAMESPACE::exp2f(-0.0f));
37 EXPECT_MATH_ERRNO(0);
38
39 EXPECT_FP_EQ_ALL_ROUNDING(2.0f, LIBC_NAMESPACE::exp2f(1.0f));
40 EXPECT_FP_EQ_ALL_ROUNDING(0.5f, LIBC_NAMESPACE::exp2f(-1.0f));
41 EXPECT_FP_EQ_ALL_ROUNDING(4.0f, LIBC_NAMESPACE::exp2f(2.0f));
42 EXPECT_FP_EQ_ALL_ROUNDING(0.25f, LIBC_NAMESPACE::exp2f(-2.0f));
43}
44
45TEST_F(LlvmLibcExp2fTest, Overflow) {
46 LIBC_NAMESPACE::libc_errno = 0;
47 EXPECT_FP_EQ_WITH_EXCEPTION(
48 inf, LIBC_NAMESPACE::exp2f(FPBits(0x7f7fffffU).get_val()), FE_OVERFLOW);
49 EXPECT_MATH_ERRNO(ERANGE);
50
51 EXPECT_FP_EQ_WITH_EXCEPTION(
52 inf, LIBC_NAMESPACE::exp2f(FPBits(0x43000000U).get_val()), FE_OVERFLOW);
53 EXPECT_MATH_ERRNO(ERANGE);
54
55 EXPECT_FP_EQ_WITH_EXCEPTION(
56 inf, LIBC_NAMESPACE::exp2f(FPBits(0x43000001U).get_val()), FE_OVERFLOW);
57 EXPECT_MATH_ERRNO(ERANGE);
58}
59

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