1//===-- Utility class to test idivfx functions ------------------*- C++ -*-===//
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 "test/UnitTest/Test.h"
10
11#include "src/__support/fixed_point/fx_rep.h"
12#include "src/__support/macros/sanitizer.h"
13
14#include "hdr/signal_macros.h"
15
16template <typename T, typename XType>
17class IdivTest : public LIBC_NAMESPACE::testing::Test {
18
19 using FXRep = LIBC_NAMESPACE::fixed_point::FXRep<T>;
20
21 static constexpr T zero = FXRep::ZERO();
22 static constexpr T max = FXRep::MAX();
23 static constexpr T min = FXRep::MIN();
24 static constexpr T one_half = FXRep::ONE_HALF();
25 static constexpr T one_fourth = FXRep::ONE_FOURTH();
26
27public:
28 typedef XType (*IdivFunc)(T, T);
29
30 void testSpecialNumbers(IdivFunc func) {
31 constexpr bool is_signed = (FXRep::SIGN_LEN > 0);
32 constexpr bool has_integral = (FXRep::INTEGRAL_LEN > 0);
33
34 EXPECT_EQ(func(one_half, one_fourth), static_cast<XType>(2));
35 EXPECT_EQ(func(one_half, one_half), static_cast<XType>(1));
36 EXPECT_EQ(func(one_fourth, one_half), static_cast<XType>(0));
37 EXPECT_EQ(func(0.75, 0.25), static_cast<XType>(3));
38 EXPECT_EQ(func(0.625, 0.125), static_cast<XType>(5));
39
40 if constexpr (is_signed) {
41 EXPECT_EQ(func(min, one_half), static_cast<XType>(min) * 2);
42 } else {
43 EXPECT_EQ(func(min, one_half), static_cast<XType>(0));
44 }
45
46 if constexpr (has_integral && min <= 7 && max >= 5) {
47 EXPECT_EQ(func(6.9, 4.2), static_cast<XType>(1));
48 EXPECT_EQ(func(4.2, 6.9), static_cast<XType>(0));
49 EXPECT_EQ(func(4.5, 2.2), static_cast<XType>(2));
50 EXPECT_EQ(func(2.2, 1.1), static_cast<XType>(2));
51 EXPECT_EQ(func(2.25, 1.0), static_cast<XType>(2));
52 EXPECT_EQ(func(2.25, 3.0), static_cast<XType>(0));
53
54 if constexpr (is_signed) {
55 EXPECT_EQ(func(4.2, -6.9), static_cast<XType>(0));
56 EXPECT_EQ(func(-6.9, 4.2), static_cast<XType>(-1));
57 EXPECT_EQ(func(-2.5, 1.25), static_cast<XType>(-2));
58 EXPECT_EQ(func(-2.25, 1.0), static_cast<XType>(-2));
59 EXPECT_EQ(func(2.25, -3.0), static_cast<XType>(0));
60 }
61 }
62 }
63
64 void testInvalidNumbers(IdivFunc func) {
65 constexpr bool has_integral = (FXRep::INTEGRAL_LEN > 0);
66
67 EXPECT_DEATH([func] { func(0.5, 0.0); }, WITH_SIGNAL(-1));
68 if constexpr (has_integral) {
69 EXPECT_DEATH([func] { func(2.5, 0.0); }, WITH_SIGNAL(-1));
70 }
71 }
72};
73
74#if defined(LIBC_ADD_NULL_CHECKS) && !defined(LIBC_HAS_SANITIZER)
75#define LIST_IDIV_TESTS(Name, T, XType, func) \
76 using LlvmLibcIdiv##Name##Test = IdivTest<T, XType>; \
77 TEST_F(LlvmLibcIdiv##Name##Test, InvalidNumbers) { \
78 testInvalidNumbers(&func); \
79 } \
80 TEST_F(LlvmLibcIdiv##Name##Test, SpecialNumbers) { \
81 testSpecialNumbers(&func); \
82 } \
83 static_assert(true, "Require semicolon.")
84#else
85#define LIST_IDIV_TESTS(Name, T, XType, func) \
86 using LlvmLibcIdiv##Name##Test = IdivTest<T, XType>; \
87 TEST_F(LlvmLibcIdiv##Name##Test, SpecialNumbers) { \
88 testSpecialNumbers(&func); \
89 } \
90 static_assert(true, "Require semicolon.")
91#endif // LIBC_HAS_ADDRESS_SANITIZER
92

source code of libc/test/src/stdfix/IdivTest.h