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