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/* ************************************************************************
* Copyright (C) 2018-2022 Advanced Micro Devices, Inc. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell cop-
* ies of the Software, and to permit persons to whom the Software is furnished
* to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IM-
* PLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNE-
* CTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* ************************************************************************ */
#include "rocblas_random.hpp"
// Random number generator
// Note: We do not use random_device to initialize the RNG, because we want
// repeatability in case of test failure. TODO: Add seed as an optional CLI
// argument, and print the seed on output, to ensure repeatability.
rocblas_rng_t g_rocblas_seed(69069); // A fixed seed to start at
// This records the main thread ID at startup
std::thread::id g_main_thread_id = std::this_thread::get_id();
// For the main thread, we use g_rocblas_seed; for other threads, we start with a different seed but
// deterministically based on the thread id's hash function.
thread_local rocblas_rng_t t_rocblas_rng = get_seed();
thread_local int t_rocblas_rand_idx;
// length to allow use as bitmask to wraparound
#define RANDLEN 1024
#define RANDWIN 256
#define RANDBUF RANDLEN + RANDWIN
static thread_local int t_rand_init = 0;
static thread_local float t_rand_f_array[RANDBUF];
static thread_local double t_rand_d_array[RANDBUF];
/* ============================================================================================ */
float rocblas_uniform_int_1_10()
{
if(!t_rand_init)
{
for(int i = 0; i < RANDBUF; i++)
{
t_rand_f_array[i]
= (float)std::uniform_int_distribution<unsigned>(1, 10)(t_rocblas_rng);
t_rand_d_array[i] = (double)t_rand_f_array[i];
}
t_rand_init = 1;
}
t_rocblas_rand_idx = (t_rocblas_rand_idx + 1) & (RANDLEN - 1);
return t_rand_f_array[t_rocblas_rand_idx];
}
inline int pseudo_rand_ptr_offset()
{
t_rocblas_rand_idx = (t_rocblas_rand_idx + 1) & (RANDWIN - 1);
return t_rocblas_rand_idx;
}
void rocblas_uniform_int_1_10_run_float(float* ptr, size_t num)
{
if(!t_rand_init)
rocblas_uniform_int_1_10();
for(size_t i = 0; i < num; i += RANDLEN)
{
float* rptr = t_rand_f_array + pseudo_rand_ptr_offset();
size_t n = i + RANDLEN < num ? RANDLEN : num - i;
memcpy(ptr, rptr, sizeof(float) * n);
ptr += RANDLEN;
}
}
void rocblas_uniform_int_1_10_run_double(double* ptr, size_t num)
{
if(!t_rand_init)
rocblas_uniform_int_1_10();
for(size_t i = 0; i < num; i += RANDLEN)
{
double* rptr = t_rand_d_array + pseudo_rand_ptr_offset();
size_t n = i + RANDLEN < num ? RANDLEN : num - i;
memcpy(ptr, rptr, sizeof(double) * n);
ptr += RANDLEN;
}
}
void rocblas_uniform_int_1_10_run_float_complex(rocblas_float_complex* ptr, size_t num)
{
if(!t_rand_init)
rocblas_uniform_int_1_10();
constexpr int rand_len = RANDLEN / 2;
for(size_t i = 0; i < num; i += rand_len)
{
float* rptr = t_rand_f_array + pseudo_rand_ptr_offset();
size_t n = i + rand_len < num ? rand_len : num - i;
memcpy(ptr, rptr, sizeof(float) * 2 * n);
ptr += rand_len;
}
}
void rocblas_uniform_int_1_10_run_double_complex(rocblas_double_complex* ptr, size_t num)
{
if(!t_rand_init)
rocblas_uniform_int_1_10();
constexpr int rand_len = RANDLEN / 2;
for(size_t i = 0; i < num; i += rand_len)
{
double* rptr = t_rand_d_array + pseudo_rand_ptr_offset();
size_t n = i + rand_len < num ? rand_len : num - i;
memcpy(ptr, rptr, sizeof(double) * 2 * n);
ptr += rand_len;
}
}
#undef RANDLEN
#undef RANDWIN
#undef RANDBUF
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