.. _program_listing_file_include_embers_rand_rand.h:

Program Listing for File rand.h
===============================

|exhale_lsh| :ref:`Return to documentation for file <file_include_embers_rand_rand.h>` (``include/embers/rand/rand.h``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   /* Copyright © 2020 Advanced Micro Devices, Inc. All rights reserved */
   
   #ifndef _EMBERS_RAND_H
   #define _EMBERS_RAND_H
   
   #include <cstdint>
   
   #include <hip/hip_runtime.h>
   
   namespace embers
   {
   namespace rand
   {
   
   template <typename T>
   inline __device__ __host__ T rand(uint32_t seed)
   {
     static constexpr uint64_t ANSIC_LCG_MULTIPLIER = 1103515245;
     static constexpr uint64_t ANSIC_LCG_ADDEND = 12345;
   
     const uint64_t rval_lo = (static_cast<uint64_t>(seed) * ANSIC_LCG_MULTIPLIER +
                               ANSIC_LCG_ADDEND) >>
                              9;
     const uint64_t rval_hi = (rval_lo * ANSIC_LCG_MULTIPLIER + ANSIC_LCG_ADDEND) << 20;
     return static_cast<T>(rval_lo ^ rval_hi);
   }
   
   }  // namespace rand
   }  // namespace embers
   
   #endif