Brecht Van Lommel
9cfc7967dd
* Replace license text in headers with SPDX identifiers. * Remove specific license info from outdated readme.txt, instead leave details to the source files. * Add list of SPDX license identifiers used, and corresponding license texts. * Update copyright dates while we're at it. Ref D14069, T95597
112 lines
4.4 KiB
C++
112 lines
4.4 KiB
C++
/* SPDX-License-Identifier: Apache-2.0
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* Copyright 2014-2022 Blender Foundation */
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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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# ifdef __KERNEL_METAL__
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// global address space versions
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ccl_device_inline float atomic_add_and_fetch_float(volatile ccl_global float *_source,
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const float operand)
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{
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volatile ccl_global atomic_int *source = (ccl_global atomic_int *)_source;
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union {
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int int_value;
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float float_value;
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} new_value, prev_value;
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prev_value.int_value = atomic_load_explicit(source, memory_order_relaxed);
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do {
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new_value.float_value = prev_value.float_value + operand;
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} while (!atomic_compare_exchange_weak_explicit(source,
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&prev_value.int_value,
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new_value.int_value,
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memory_order_relaxed,
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memory_order_relaxed));
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return new_value.float_value;
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}
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# define atomic_fetch_and_add_uint32(p, x) \
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atomic_fetch_add_explicit((device atomic_uint *)p, x, memory_order_relaxed)
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# define atomic_fetch_and_sub_uint32(p, x) \
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atomic_fetch_sub_explicit((device atomic_uint *)p, x, memory_order_relaxed)
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# define atomic_fetch_and_inc_uint32(p) \
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atomic_fetch_add_explicit((device atomic_uint *)p, 1, memory_order_relaxed)
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# define atomic_fetch_and_dec_uint32(p) \
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atomic_fetch_sub_explicit((device atomic_uint *)p, 1, memory_order_relaxed)
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# define atomic_fetch_and_or_uint32(p, x) \
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atomic_fetch_or_explicit((device atomic_uint *)p, x, memory_order_relaxed)
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ccl_device_inline float atomic_compare_and_swap_float(volatile ccl_global 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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int prev_value;
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prev_value = __float_as_int(old_val);
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atomic_compare_exchange_weak_explicit((ccl_global atomic_int *)dest,
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&prev_value,
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__float_as_int(new_val),
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memory_order_relaxed,
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memory_order_relaxed);
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return __int_as_float(prev_value);
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}
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# define atomic_store(p, x) atomic_store_explicit(p, x, memory_order_relaxed)
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# define atomic_fetch(p) atomic_load_explicit(p, memory_order_relaxed)
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# define CCL_LOCAL_MEM_FENCE mem_flags::mem_threadgroup
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# define ccl_barrier(flags) threadgroup_barrier(flags)
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# endif /* __KERNEL_METAL__ */
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#endif /* __KERNEL_GPU__ */
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#endif /* __UTIL_ATOMIC_H__ */
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