1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
|
/* SPDX-License-Identifier: Apache-2.0
* Copyright 2014-2022 Blender Foundation */
#ifndef __UTIL_ATOMIC_H__
#define __UTIL_ATOMIC_H__
#ifndef __KERNEL_GPU__
/* Using atomic ops header from Blender. */
# include "atomic_ops.h"
# define atomic_add_and_fetch_float(p, x) atomic_add_and_fetch_fl((p), (x))
# define atomic_compare_and_swap_float(p, old_val, new_val) \
atomic_cas_float((p), (old_val), (new_val))
# define atomic_fetch_and_inc_uint32(p) atomic_fetch_and_add_uint32((p), 1)
# define atomic_fetch_and_dec_uint32(p) atomic_fetch_and_add_uint32((p), -1)
# define CCL_LOCAL_MEM_FENCE 0
# define ccl_barrier(flags) ((void)0)
#else /* __KERNEL_GPU__ */
# if defined(__KERNEL_CUDA__) || defined(__KERNEL_HIP__)
# define atomic_add_and_fetch_float(p, x) (atomicAdd((float *)(p), (float)(x)) + (float)(x))
# define atomic_fetch_and_add_uint32(p, x) atomicAdd((unsigned int *)(p), (unsigned int)(x))
# define atomic_fetch_and_sub_uint32(p, x) atomicSub((unsigned int *)(p), (unsigned int)(x))
# define atomic_fetch_and_inc_uint32(p) atomic_fetch_and_add_uint32((p), 1)
# define atomic_fetch_and_dec_uint32(p) atomic_fetch_and_sub_uint32((p), 1)
# define atomic_fetch_and_or_uint32(p, x) atomicOr((unsigned int *)(p), (unsigned int)(x))
ccl_device_inline float atomic_compare_and_swap_float(volatile float *dest,
const float old_val,
const float new_val)
{
union {
unsigned int int_value;
float float_value;
} new_value, prev_value, result;
prev_value.float_value = old_val;
new_value.float_value = new_val;
result.int_value = atomicCAS((unsigned int *)dest, prev_value.int_value, new_value.int_value);
return result.float_value;
}
# define CCL_LOCAL_MEM_FENCE
# define ccl_barrier(flags) __syncthreads()
# endif /* __KERNEL_CUDA__ */
# ifdef __KERNEL_METAL__
// global address space versions
ccl_device_inline float atomic_add_and_fetch_float(volatile ccl_global float *_source,
const float operand)
{
volatile ccl_global atomic_int *source = (ccl_global atomic_int *)_source;
union {
int int_value;
float float_value;
} new_value, prev_value;
prev_value.int_value = atomic_load_explicit(source, memory_order_relaxed);
do {
new_value.float_value = prev_value.float_value + operand;
} while (!atomic_compare_exchange_weak_explicit(source,
&prev_value.int_value,
new_value.int_value,
memory_order_relaxed,
memory_order_relaxed));
return new_value.float_value;
}
# define atomic_fetch_and_add_uint32(p, x) \
atomic_fetch_add_explicit((device atomic_uint *)p, x, memory_order_relaxed)
# define atomic_fetch_and_sub_uint32(p, x) \
atomic_fetch_sub_explicit((device atomic_uint *)p, x, memory_order_relaxed)
# define atomic_fetch_and_inc_uint32(p) \
atomic_fetch_add_explicit((device atomic_uint *)p, 1, memory_order_relaxed)
# define atomic_fetch_and_dec_uint32(p) \
atomic_fetch_sub_explicit((device atomic_uint *)p, 1, memory_order_relaxed)
# define atomic_fetch_and_or_uint32(p, x) \
atomic_fetch_or_explicit((device atomic_uint *)p, x, memory_order_relaxed)
ccl_device_inline float atomic_compare_and_swap_float(volatile ccl_global float *dest,
const float old_val,
const float new_val)
{
int prev_value;
prev_value = __float_as_int(old_val);
atomic_compare_exchange_weak_explicit((ccl_global atomic_int *)dest,
&prev_value,
__float_as_int(new_val),
memory_order_relaxed,
memory_order_relaxed);
return __int_as_float(prev_value);
}
# define atomic_store(p, x) atomic_store_explicit(p, x, memory_order_relaxed)
# define atomic_fetch(p) atomic_load_explicit(p, memory_order_relaxed)
# define CCL_LOCAL_MEM_FENCE mem_flags::mem_threadgroup
# define ccl_barrier(flags) threadgroup_barrier(flags)
# endif /* __KERNEL_METAL__ */
#endif /* __KERNEL_GPU__ */
#endif /* __UTIL_ATOMIC_H__ */
|
