1 //===-- Unittests for hypotf ----------------------------------------------===//
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 "include/math.h"
10 #include "src/math/hypotf.h"
11 #include "utils/FPUtil/FPBits.h"
12 #include "utils/FPUtil/TestHelpers.h"
13 #include "utils/MPFRWrapper/MPFRUtils.h"
14 #include "utils/UnitTest/Test.h"
15 
16 using FPBits = __llvm_libc::fputil::FPBits<float>;
17 using UIntType = FPBits::UIntType;
18 
19 namespace mpfr = __llvm_libc::testing::mpfr;
20 
21 static const float zero = FPBits::zero();
22 static const float negZero = FPBits::negZero();
23 static const float nan = FPBits::buildNaN(1);
24 static const float inf = FPBits::inf();
25 static const float negInf = FPBits::negInf();
26 
27 TEST(HypotfTest, SpecialNumbers) {
28   EXPECT_FP_EQ(__llvm_libc::hypotf(inf, nan), inf);
29   EXPECT_FP_EQ(__llvm_libc::hypotf(nan, negInf), inf);
30   EXPECT_FP_EQ(__llvm_libc::hypotf(zero, inf), inf);
31   EXPECT_FP_EQ(__llvm_libc::hypotf(negInf, negZero), inf);
32 
33   EXPECT_FP_EQ(__llvm_libc::hypotf(nan, nan), nan);
34   EXPECT_FP_EQ(__llvm_libc::hypotf(nan, zero), nan);
35   EXPECT_FP_EQ(__llvm_libc::hypotf(negZero, nan), nan);
36 
37   EXPECT_FP_EQ(__llvm_libc::hypotf(negZero, zero), zero);
38 }
39 
40 TEST(HypotfTest, SubnormalRange) {
41   constexpr UIntType count = 1000001;
42   constexpr UIntType step =
43       (FPBits::maxSubnormal - FPBits::minSubnormal) / count;
44   for (UIntType v = FPBits::minSubnormal, w = FPBits::maxSubnormal;
45        v <= FPBits::maxSubnormal && w >= FPBits::minSubnormal;
46        v += step, w -= step) {
47     float x = FPBits(v), y = FPBits(w);
48     float result = __llvm_libc::hypotf(x, y);
49     mpfr::BinaryInput<float> input{x, y};
50     ASSERT_MPFR_MATCH(mpfr::Operation::Hypot, input, result, 0.5);
51   }
52 }
53 
54 TEST(HypotfTest, NormalRange) {
55   constexpr UIntType count = 1000001;
56   constexpr UIntType step = (FPBits::maxNormal - FPBits::minNormal) / count;
57   for (UIntType v = FPBits::minNormal, w = FPBits::maxNormal;
58        v <= FPBits::maxNormal && w >= FPBits::minNormal; v += step, w -= step) {
59     float x = FPBits(v), y = FPBits(w);
60     float result = __llvm_libc::hypotf(x, y);
61     ;
62     mpfr::BinaryInput<float> input{x, y};
63     ASSERT_MPFR_MATCH(mpfr::Operation::Hypot, input, result, 0.5);
64   }
65 }
66