libc/fuzzing/math/Compare.h

   1 //===-- Template functions to compare scalar values -------------*- 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_COMPARE_H
  10 #define LLVM_LIBC_FUZZING_MATH_COMPARE_H
  11
  12 #include "src/__support/CPP/type_traits.h"
  13 #include "src/__support/FPUtil/FPBits.h"
  14
  15 template <typename T>
  16 LIBC_NAMESPACE::cpp::enable_if_t<LIBC_NAMESPACE::cpp::is_floating_point_v<T>,
  17                                  bool>
  18 ValuesEqual(T x1, T x2) {
  19   LIBC_NAMESPACE::fputil::FPBits<T> bits1(x1);
  20   LIBC_NAMESPACE::fputil::FPBits<T> bits2(x2);
  21   // If either is NaN, we want both to be NaN.
  22   if (bits1.is_nan() || bits2.is_nan())
  23     return bits1.is_nan() && bits2.is_nan();
  24
  25   // For all other values, we want the values to be bitwise equal.
  26   return bits1.uintval() == bits2.uintval();
  27 }
  28
  29 template <typename T>
  30 LIBC_NAMESPACE::cpp::enable_if_t<LIBC_NAMESPACE::cpp::is_integral_v<T>, bool>
  31 ValuesEqual(T x1, T x2) {
  32   return x1 == x2;
  33 }
  34
  35 #endif // LLVM_LIBC_FUZZING_MATH_COMPARE_H