chromium/third_party/tflite/src/third_party/xla/third_party/tsl/tsl/lib/random/random_distributions_utils.h

/* Copyright 2021 The TensorFlow Authors. All Rights Reserved.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
==============================================================================*/

#ifndef TENSORFLOW_TSL_LIB_RANDOM_RANDOM_DISTRIBUTIONS_UTILS_H_
#define TENSORFLOW_TSL_LIB_RANDOM_RANDOM_DISTRIBUTIONS_UTILS_H_

#include <string.h>

#include <cstdint>

#include "tsl/lib/random/philox_random.h"

#ifndef M_PI
#define M_PI …
#endif

namespace tsl {
namespace random {

// Helper function to convert an 32-bit integer to a float between [0..1).
PHILOX_DEVICE_INLINE float Uint32ToFloat(uint32_t x) { … }

// Helper function to convert two 32-bit integers to a double between [0..1).
PHILOX_DEVICE_INLINE double Uint64ToDouble(uint32_t x0, uint32_t x1) { … }

// Helper function to convert two 32-bit uniform integers to two floats
// under the unit normal distribution.
PHILOX_DEVICE_INLINE
void BoxMullerFloat(uint32_t x0, uint32_t x1, float* f0, float* f1) { … }

}  // namespace random
}  // namespace tsl

#endif  // TENSORFLOW_TSL_LIB_RANDOM_RANDOM_DISTRIBUTIONS_UTILS_H_