1 /* atomic.c -- Builtins for HSAIL atomic instructions for which
2 there is no feasible direct gcc GENERIC expression.
3
4 Copyright (C) 2015-2020 Free Software Foundation, Inc.
5 Contributed by Pekka Jaaskelainen <pekka.jaaskelainen@parmance.com>
6 for General Processor Tech.
7
8 Permission is hereby granted, free of charge, to any person obtaining a
9 copy of this software and associated documentation files
10 (the "Software"), to deal in the Software without restriction, including
11 without limitation the rights to use, copy, modify, merge, publish,
12 distribute, sublicense, and/or sell copies of the Software, and to
13 permit persons to whom the Software is furnished to do so, subject to
14 the following conditions:
15
16 The above copyright notice and this permission notice shall be included
17 in all copies or substantial portions of the Software.
18
19 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
22 IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
23 DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
24 OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
25 USE OR OTHER DEALINGS IN THE SOFTWARE.
26 */
27
28 #include <stdint.h>
29 #include <stdio.h>
30
31 #define DO_ATOMICALLY(T, OPERATION) \
32 int done = 0; \
33 T old_value; \
34 T new_value; \
35 while (!done) \
36 { \
37 old_value = *ptr; \
38 new_value = OPERATION; \
39 done = __sync_bool_compare_and_swap (ptr, old_value, new_value); \
40 } \
41 return old_value
42
43 int32_t
__hsail_atomic_min_s32(int32_t * ptr,int32_t a)44 __hsail_atomic_min_s32 (int32_t *ptr, int32_t a)
45 {
46 DO_ATOMICALLY (int32_t, (old_value < a) ? old_value : a);
47 }
48
49 int64_t
__hsail_atomic_min_s64(int64_t * ptr,int64_t a)50 __hsail_atomic_min_s64 (int64_t *ptr, int64_t a)
51 {
52 DO_ATOMICALLY (int64_t, (old_value < a) ? old_value : a);
53 }
54
55 uint32_t
__hsail_atomic_min_u32(uint32_t * ptr,uint32_t a)56 __hsail_atomic_min_u32 (uint32_t *ptr, uint32_t a)
57 {
58 DO_ATOMICALLY (uint32_t, (old_value < a) ? old_value : a);
59 }
60
61 uint64_t
__hsail_atomic_min_u64(uint64_t * ptr,uint64_t a)62 __hsail_atomic_min_u64 (uint64_t *ptr, uint64_t a)
63 {
64 DO_ATOMICALLY (uint64_t, (old_value < a) ? old_value : a);
65 }
66
67 uint32_t
__hsail_atomic_max_u32(uint32_t * ptr,uint32_t a)68 __hsail_atomic_max_u32 (uint32_t *ptr, uint32_t a)
69 {
70 DO_ATOMICALLY (uint32_t, (old_value > a) ? old_value : a);
71 }
72
73 int32_t
__hsail_atomic_max_s32(int32_t * ptr,int32_t a)74 __hsail_atomic_max_s32 (int32_t *ptr, int32_t a)
75 {
76 DO_ATOMICALLY (int32_t, (old_value > a) ? old_value : a);
77 }
78
79 uint64_t
__hsail_atomic_max_u64(uint64_t * ptr,uint64_t a)80 __hsail_atomic_max_u64 (uint64_t *ptr, uint64_t a)
81 {
82 DO_ATOMICALLY (uint64_t, (old_value > a) ? old_value : a);
83 }
84
85 int64_t
__hsail_atomic_max_s64(int64_t * ptr,int64_t a)86 __hsail_atomic_max_s64 (int64_t *ptr, int64_t a)
87 {
88 DO_ATOMICALLY (int64_t, (old_value > a) ? old_value : a);
89 }
90
91 uint32_t
__hsail_atomic_wrapinc_u32(uint32_t * ptr,uint32_t a)92 __hsail_atomic_wrapinc_u32 (uint32_t *ptr, uint32_t a)
93 {
94 DO_ATOMICALLY (uint32_t, (old_value >= a) ? 0 : (old_value + 1));
95 }
96
97 uint64_t
__hsail_atomic_wrapinc_u64(uint64_t * ptr,uint64_t a)98 __hsail_atomic_wrapinc_u64 (uint64_t *ptr, uint64_t a)
99 {
100 DO_ATOMICALLY (uint64_t, (old_value >= a) ? 0 : (old_value + 1));
101 }
102
103 uint32_t
__hsail_atomic_wrapdec_u32(uint32_t * ptr,uint32_t a)104 __hsail_atomic_wrapdec_u32 (uint32_t *ptr, uint32_t a)
105 {
106 DO_ATOMICALLY (uint32_t,
107 ((old_value == 0) || (old_value > a)) ? a : (old_value - 1));
108 }
109
110 uint64_t
__hsail_atomic_wrapdec_u64(uint64_t * ptr,uint64_t a)111 __hsail_atomic_wrapdec_u64 (uint64_t *ptr, uint64_t a)
112 {
113 DO_ATOMICALLY (uint64_t,
114 ((old_value == 0) || (old_value > a)) ? a : (old_value - 1));
115 }
116