70 lines
2.6 KiB
C
70 lines
2.6 KiB
C
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#pragma once
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// OpenCL SDK includes
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#include "OpenCLSDK_Export.h"
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// Standard C includes
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#include <stddef.h> // size_t
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#include <stdint.h> // uint64_t
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// OpenCL includes
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#include <CL/cl.h> // cl_int, cl_float
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/*
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* PCG Random Number Generation for C.
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*
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* Copyright 2014 Melissa O'Neill <oneill@pcg-random.org>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* For additional information about the PCG random number generation scheme,
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* including its license and other licensing options, visit
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*
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* http://www.pcg-random.org
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*/
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// *Really* minimal PCG32 code / (c) 2014 M.E. O'Neill / pcg-random.org
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// Licensed under Apache License 2.0 (NO WARRANTY, etc. see website)
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typedef struct
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{
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uint64_t state;
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uint64_t inc;
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} pcg32_random_t;
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// pcg32_srandom(initstate, initseq)
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// pcg32_srandom_r(rng, initstate, initseq):
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// Seed the rng. Specified in two parts, state initializer and a
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// sequence selection constant (a.k.a. stream id)
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SDK_EXPORT void pcg32_srandom_r(pcg32_random_t* rng, uint64_t initstate,
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uint64_t initseq);
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// fill array with random floats in [0, 1)
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SDK_EXPORT void cl_sdk_fill_with_random_floats(pcg32_random_t* rng,
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cl_float* arr, const size_t len);
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SDK_EXPORT void cl_sdk_fill_with_random_floats_range(pcg32_random_t* rng,
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cl_float* arr,
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const size_t len,
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const cl_float low,
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const cl_float hi);
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// return uniformly distributed numbers in the range [low, hi]
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// use rejection sampling from uniform bit distribution
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SDK_EXPORT void cl_sdk_fill_with_random_ints_range(pcg32_random_t* rng,
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cl_int* arr,
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const size_t len,
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const cl_int low,
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const cl_int hi);
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