1 | //===-- Unittests for 2^x -------------------------------------------------===// |
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/exp2.h" |
13 | #include "test/UnitTest/FPMatcher.h" |
14 | #include "test/UnitTest/Test.h" |
15 | |
16 | #include <stdint.h> |
17 | |
18 | using LlvmLibcExp2Test = LIBC_NAMESPACE::testing::FPTest<double>; |
19 | |
20 | TEST_F(LlvmLibcExp2Test, SpecialNumbers) { |
21 | EXPECT_FP_EQ_WITH_EXCEPTION(aNaN, LIBC_NAMESPACE::exp2(sNaN), FE_INVALID); |
22 | EXPECT_MATH_ERRNO(0); |
23 | |
24 | EXPECT_FP_EQ(aNaN, LIBC_NAMESPACE::exp2(aNaN)); |
25 | EXPECT_FP_EQ(inf, LIBC_NAMESPACE::exp2(inf)); |
26 | EXPECT_FP_EQ_ALL_ROUNDING(zero, LIBC_NAMESPACE::exp2(neg_inf)); |
27 | EXPECT_FP_EQ_WITH_EXCEPTION(zero, LIBC_NAMESPACE::exp2(-0x1.0p20), |
28 | FE_UNDERFLOW); |
29 | EXPECT_FP_EQ_WITH_EXCEPTION(inf, LIBC_NAMESPACE::exp2(0x1.0p20), FE_OVERFLOW); |
30 | EXPECT_FP_EQ_ALL_ROUNDING(1.0, LIBC_NAMESPACE::exp2(0.0)); |
31 | EXPECT_FP_EQ_ALL_ROUNDING(1.0, LIBC_NAMESPACE::exp2(-0.0)); |
32 | EXPECT_FP_EQ_ALL_ROUNDING(2.0, LIBC_NAMESPACE::exp2(1.0)); |
33 | EXPECT_FP_EQ_ALL_ROUNDING(0.5, LIBC_NAMESPACE::exp2(-1.0)); |
34 | EXPECT_FP_EQ_ALL_ROUNDING(4.0, LIBC_NAMESPACE::exp2(2.0)); |
35 | EXPECT_FP_EQ_ALL_ROUNDING(0.25, LIBC_NAMESPACE::exp2(-2.0)); |
36 | } |
37 | |
38 | #ifdef LIBC_TEST_FTZ_DAZ |
39 | |
40 | using namespace LIBC_NAMESPACE::testing; |
41 | |
42 | TEST_F(LlvmLibcExp2Test, FTZMode) { |
43 | ModifyMXCSR mxcsr(FTZ); |
44 | |
45 | EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp2(min_denormal)); |
46 | EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp2(max_denormal)); |
47 | } |
48 | |
49 | TEST_F(LlvmLibcExp2Test, DAZMode) { |
50 | ModifyMXCSR mxcsr(DAZ); |
51 | |
52 | EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp2(min_denormal)); |
53 | EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp2(max_denormal)); |
54 | } |
55 | |
56 | TEST_F(LlvmLibcExp2Test, FTZDAZMode) { |
57 | ModifyMXCSR mxcsr(FTZ | DAZ); |
58 | |
59 | EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp2(min_denormal)); |
60 | EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp2(max_denormal)); |
61 | } |
62 | |
63 | #endif |
64 | |