044a77352f
NOTE: this feature is not ready for user testing, and not yet enabled in daily builds. It is being merged now for easier collaboration on development. HIP is a heterogenous compute interface allowing C++ code to be executed on GPUs similar to CUDA. It is intended to bring back AMD GPU rendering support on Windows and Linux. https://github.com/ROCm-Developer-Tools/HIP. As of the time of writing, it should compile and run on Linux with existing HIP compilers and driver runtimes. Publicly available compilers and drivers for Windows will come later. See task T91571 for more details on the current status and work remaining to be done. Credits: Sayak Biswas (AMD) Arya Rafii (AMD) Brian Savery (AMD) Differential Revision: https://developer.blender.org/D12578
69 lines
2.4 KiB
C++
69 lines
2.4 KiB
C++
/*
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* Copyright 2014 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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#ifndef __UTIL_ATOMIC_H__
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#define __UTIL_ATOMIC_H__
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#ifndef __KERNEL_GPU__
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/* Using atomic ops header from Blender. */
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# include "atomic_ops.h"
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# define atomic_add_and_fetch_float(p, x) atomic_add_and_fetch_fl((p), (x))
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# define atomic_compare_and_swap_float(p, old_val, new_val) \
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atomic_cas_float((p), (old_val), (new_val))
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# define atomic_fetch_and_inc_uint32(p) atomic_fetch_and_add_uint32((p), 1)
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# define atomic_fetch_and_dec_uint32(p) atomic_fetch_and_add_uint32((p), -1)
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# define CCL_LOCAL_MEM_FENCE 0
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# define ccl_barrier(flags) ((void)0)
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#else /* __KERNEL_GPU__ */
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# if defined(__KERNEL_CUDA__) || defined(__KERNEL_HIP__)
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# define atomic_add_and_fetch_float(p, x) (atomicAdd((float *)(p), (float)(x)) + (float)(x))
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# define atomic_fetch_and_add_uint32(p, x) atomicAdd((unsigned int *)(p), (unsigned int)(x))
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# define atomic_fetch_and_sub_uint32(p, x) atomicSub((unsigned int *)(p), (unsigned int)(x))
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# define atomic_fetch_and_inc_uint32(p) atomic_fetch_and_add_uint32((p), 1)
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# define atomic_fetch_and_dec_uint32(p) atomic_fetch_and_sub_uint32((p), 1)
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# define atomic_fetch_and_or_uint32(p, x) atomicOr((unsigned int *)(p), (unsigned int)(x))
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ccl_device_inline float atomic_compare_and_swap_float(volatile float *dest,
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const float old_val,
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const float new_val)
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{
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union {
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unsigned int int_value;
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float float_value;
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} new_value, prev_value, result;
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prev_value.float_value = old_val;
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new_value.float_value = new_val;
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result.int_value = atomicCAS((unsigned int *)dest, prev_value.int_value, new_value.int_value);
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return result.float_value;
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}
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# define CCL_LOCAL_MEM_FENCE
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# define ccl_barrier(flags) __syncthreads()
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# endif /* __KERNEL_CUDA__ */
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#endif /* __KERNEL_GPU__ */
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#endif /* __UTIL_ATOMIC_H__ */
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