d19e35873f
This patch contains many small leftover fixes and additions that are required for Metal-enablement: - Address space fixes and a few other small compile fixes - Addition of missing functionality to the Metal adapter headers - Addition of various scattered `__KERNEL_METAL__` blocks (e.g. for atomic support & maths functions) Ref T92212 Differential Revision: https://developer.blender.org/D13263
54 lines
1.5 KiB
C++
54 lines
1.5 KiB
C++
/*
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* Copyright 2011-2013 Blender Foundation
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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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#pragma once
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CCL_NAMESPACE_BEGIN
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/* Linear Congruential Generator */
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/* This is templated to handle multiple address spaces on Metal. */
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template<class T> ccl_device uint lcg_step_uint(T rng)
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{
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/* implicit mod 2^32 */
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*rng = (1103515245 * (*rng) + 12345);
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return *rng;
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}
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/* This is templated to handle multiple address spaces on Metal. */
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template<class T> ccl_device float lcg_step_float(T rng)
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{
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/* implicit mod 2^32 */
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*rng = (1103515245 * (*rng) + 12345);
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return (float)*rng * (1.0f / (float)0xFFFFFFFF);
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}
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ccl_device uint lcg_init(uint seed)
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{
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uint rng = seed;
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lcg_step_uint(&rng);
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return rng;
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}
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ccl_device_inline uint lcg_state_init(const uint rng_hash,
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const uint rng_offset,
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const uint sample,
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const uint scramble)
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{
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return lcg_init(rng_hash + rng_offset + sample * scramble);
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}
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CCL_NAMESPACE_END
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