.. _program_listing_file_include_embers_crypto_helpers.h:

Program Listing for File helpers.h
==================================

|exhale_lsh| :ref:`Return to documentation for file <file_include_embers_crypto_helpers.h>` (``include/embers/crypto/helpers.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_CRYPTO_HELPERS_H_
   #define _EMBERS_CRYPTO_HELPERS_H_
   
   #include <cstdint>
   #include <hip/hip_runtime.h>
   
   namespace embers
   {
   
   namespace crypto
   {
   
   constexpr int HASH256_H8_NUM_INDEXES = 4;
   constexpr int HASH256_H4_NUM_INDEXES = (2 * HASH256_H8_NUM_INDEXES);
   constexpr int HASH256_H2_NUM_INDEXES = (2 * HASH256_H4_NUM_INDEXES);
   constexpr int HASH256_H1_NUM_INDEXES = (2 * HASH256_H2_NUM_INDEXES);
   
   struct hash256_t {
     union {
       uint64_t h8[HASH256_H8_NUM_INDEXES];
       uint32_t h4[HASH256_H4_NUM_INDEXES];
       uint16_t h2[HASH256_H2_NUM_INDEXES];
       uint8_t h1[HASH256_H1_NUM_INDEXES];
     };
     __host__ __device__ inline bool operator==(const hash256_t &other) const
     {
       for (auto i = 0; i < HASH256_H8_NUM_INDEXES; i++) {
         if (h8[i] != other.h8[i]) {
           return false;
         }
       }
       return true;
     }
     __host__ __device__ inline bool operator!=(const hash256_t &other) const
     {
       return !(this->operator==(other));
     }
     __host__ __device__ inline hash256_t operator^(const hash256_t &other) const
     {
       hash256_t hash;
       for (auto i = 0; i < HASH256_H8_NUM_INDEXES; i++) {
         hash.h8[i] = h8[i] ^ other.h8[i];
       }
       return hash;
     }
   };
   }  // namespace crypto
   }  // namespace embers
   #endif  // _EMBERS_CRYPTO_HELPERS_H_