1 //===-- Unittests for expf ------------------------------------------------===//
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/expf.h"
13 #include "test/UnitTest/FPMatcher.h"
14 #include "test/UnitTest/Test.h"
15
16 #include <stdint.h>
17
18 using LlvmLibcExpfTest = LIBC_NAMESPACE::testing::FPTest<float>;
19
TEST_F(LlvmLibcExpfTest,SpecialNumbers)20 TEST_F(LlvmLibcExpfTest, SpecialNumbers) {
21 LIBC_NAMESPACE::libc_errno = 0;
22
23 EXPECT_FP_EQ_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::expf(aNaN));
24 EXPECT_MATH_ERRNO(0);
25
26 EXPECT_FP_EQ_ALL_ROUNDING(inf, LIBC_NAMESPACE::expf(inf));
27 EXPECT_MATH_ERRNO(0);
28
29 EXPECT_FP_EQ_ALL_ROUNDING(0.0f, LIBC_NAMESPACE::expf(neg_inf));
30 EXPECT_MATH_ERRNO(0);
31
32 EXPECT_FP_EQ_ALL_ROUNDING(1.0f, LIBC_NAMESPACE::expf(0.0f));
33 EXPECT_MATH_ERRNO(0);
34
35 EXPECT_FP_EQ_ALL_ROUNDING(1.0f, LIBC_NAMESPACE::expf(-0.0f));
36 EXPECT_MATH_ERRNO(0);
37 }
38
TEST_F(LlvmLibcExpfTest,Overflow)39 TEST_F(LlvmLibcExpfTest, Overflow) {
40 LIBC_NAMESPACE::libc_errno = 0;
41 EXPECT_FP_EQ_WITH_EXCEPTION(
42 inf, LIBC_NAMESPACE::expf(FPBits(0x7f7fffffU).get_val()), FE_OVERFLOW);
43 EXPECT_MATH_ERRNO(ERANGE);
44
45 EXPECT_FP_EQ_WITH_EXCEPTION(
46 inf, LIBC_NAMESPACE::expf(FPBits(0x42cffff8U).get_val()), FE_OVERFLOW);
47 EXPECT_MATH_ERRNO(ERANGE);
48
49 EXPECT_FP_EQ_WITH_EXCEPTION(
50 inf, LIBC_NAMESPACE::expf(FPBits(0x42d00008U).get_val()), FE_OVERFLOW);
51 EXPECT_MATH_ERRNO(ERANGE);
52 }
53
54 #ifdef LIBC_TEST_FTZ_DAZ
55
56 using namespace LIBC_NAMESPACE::testing;
57
TEST_F(LlvmLibcExpfTest,FTZMode)58 TEST_F(LlvmLibcExpfTest, FTZMode) {
59 ModifyMXCSR mxcsr(FTZ);
60
61 EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::expf(min_denormal));
62 EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::expf(max_denormal));
63 }
64
TEST_F(LlvmLibcExpfTest,DAZMode)65 TEST_F(LlvmLibcExpfTest, DAZMode) {
66 ModifyMXCSR mxcsr(DAZ);
67
68 EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::expf(min_denormal));
69 EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::expf(max_denormal));
70 }
71
TEST_F(LlvmLibcExpfTest,FTZDAZMode)72 TEST_F(LlvmLibcExpfTest, FTZDAZMode) {
73 ModifyMXCSR mxcsr(FTZ | DAZ);
74
75 EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::expf(min_denormal));
76 EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::expf(max_denormal));
77 }
78
79 #endif
80