1 //===-- Unittests for fmin -----------------------------------------------===//
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 "src/math/fmin.h"
10 #include "utils/FPUtil/FPBits.h"
11 #include "utils/FPUtil/TestHelpers.h"
12 #include "utils/UnitTest/Test.h"
13 #include <math.h>
14
15 using FPBits = __llvm_libc::fputil::FPBits<double>;
16
17 DECLARE_SPECIAL_CONSTANTS(double)
18
TEST(LlvmLibcFminTest,NaNArg)19 TEST(LlvmLibcFminTest, NaNArg) {
20 EXPECT_FP_EQ(inf, __llvm_libc::fmin(aNaN, inf));
21 EXPECT_FP_EQ(negInf, __llvm_libc::fmin(negInf, aNaN));
22 EXPECT_FP_EQ(0.0, __llvm_libc::fmin(aNaN, 0.0));
23 EXPECT_FP_EQ(-0.0, __llvm_libc::fmin(-0.0, aNaN));
24 EXPECT_FP_EQ(-1.2345, __llvm_libc::fmin(aNaN, -1.2345));
25 EXPECT_FP_EQ(1.2345, __llvm_libc::fmin(1.2345, aNaN));
26 EXPECT_FP_EQ(aNaN, __llvm_libc::fmin(aNaN, aNaN));
27 }
28
TEST(LlvmLibcFminTest,InfArg)29 TEST(LlvmLibcFminTest, InfArg) {
30 EXPECT_FP_EQ(negInf, __llvm_libc::fmin(negInf, inf));
31 EXPECT_FP_EQ(0.0, __llvm_libc::fmin(inf, 0.0));
32 EXPECT_FP_EQ(-0.0, __llvm_libc::fmin(-0.0, inf));
33 EXPECT_FP_EQ(1.2345, __llvm_libc::fmin(inf, 1.2345));
34 EXPECT_FP_EQ(-1.2345, __llvm_libc::fmin(-1.2345, inf));
35 }
36
TEST(LlvmLibcFminTest,NegInfArg)37 TEST(LlvmLibcFminTest, NegInfArg) {
38 EXPECT_FP_EQ(negInf, __llvm_libc::fmin(inf, negInf));
39 EXPECT_FP_EQ(negInf, __llvm_libc::fmin(negInf, 0.0));
40 EXPECT_FP_EQ(negInf, __llvm_libc::fmin(-0.0, negInf));
41 EXPECT_FP_EQ(negInf, __llvm_libc::fmin(negInf, -1.2345));
42 EXPECT_FP_EQ(negInf, __llvm_libc::fmin(1.2345, negInf));
43 }
44
TEST(LlvmLibcFminTest,BothZero)45 TEST(LlvmLibcFminTest, BothZero) {
46 EXPECT_FP_EQ(0.0, __llvm_libc::fmin(0.0, 0.0));
47 EXPECT_FP_EQ(-0.0, __llvm_libc::fmin(-0.0, 0.0));
48 EXPECT_FP_EQ(-0.0, __llvm_libc::fmin(0.0, -0.0));
49 EXPECT_FP_EQ(-0.0, __llvm_libc::fmin(-0.0, -0.0));
50 }
51
TEST(LlvmLibcFminTest,InFloatRange)52 TEST(LlvmLibcFminTest, InFloatRange) {
53 using UIntType = FPBits::UIntType;
54 constexpr UIntType count = 10000000;
55 constexpr UIntType step = UIntType(-1) / count;
56 for (UIntType i = 0, v = 0, w = UIntType(-1); i <= count;
57 ++i, v += step, w -= step) {
58 double x = FPBits(v), y = FPBits(w);
59 if (isnan(x) || isinf(x))
60 continue;
61 if (isnan(y) || isinf(y))
62 continue;
63 if ((x == 0) && (y == 0))
64 continue;
65
66 if (x < y) {
67 ASSERT_FP_EQ(x, __llvm_libc::fmin(x, y));
68 } else {
69 ASSERT_FP_EQ(y, __llvm_libc::fmin(x, y));
70 }
71 }
72 }
73