1 //===-- Template to diff two-input-single-output 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 #ifndef LLVM_LIBC_FUZZING_MATH_TWO_INPUT_SINGLE_OUTPUT_DIFF_H
10 #define LLVM_LIBC_FUZZING_MATH_TWO_INPUT_SINGLE_OUTPUT_DIFF_H
11 
12 #include "fuzzing/math/Compare.h"
13 #include "utils/FPUtil/FPBits.h"
14 
15 #include <math.h>
16 #include <stddef.h>
17 #include <stdint.h>
RemQuoDiff(RemQuoFunc<T> func1,RemQuoFunc<T> func2,const uint8_t * data,size_t size)18 
19 template <typename T1, typename T2>
20 using TwoInputSingleOutputFunc = T1 (*)(T1, T2);
21 
22 template <typename T1, typename T2>
23 void TwoInputSingleOutputDiff(TwoInputSingleOutputFunc<T1, T2> func1,
24                               TwoInputSingleOutputFunc<T1, T2> func2,
25                               const uint8_t *data, size_t size) {
26   constexpr size_t t1Size = sizeof(T1);
27   if (size < t1Size + sizeof(T2))
28     return;
29 
30   T1 x = *reinterpret_cast<const T1 *>(data);
31   T2 y = *reinterpret_cast<const T2 *>(data + t1Size);
32 
33   T1 result1 = func1(x, y);
34   T1 result2 = func2(x, y);
35 
36   if (!ValuesEqual(result1, result2))
37     __builtin_trap();
38 }
39 
40 #endif // LLVM_LIBC_FUZZING_MATH_TWO_INPUT_SINGLE_OUTPUT_DIFF_H
41