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1 /* atomic.c -- Builtins for HSAIL atomic instructions for which
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2 there is no feasible direct gcc GENERIC expression.
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3
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145
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4 Copyright (C) 2015-2020 Free Software Foundation, Inc.
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111
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5 Contributed by Pekka Jaaskelainen <pekka.jaaskelainen@parmance.com>
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6 for General Processor Tech.
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7
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8 Permission is hereby granted, free of charge, to any person obtaining a
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9 copy of this software and associated documentation files
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10 (the "Software"), to deal in the Software without restriction, including
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11 without limitation the rights to use, copy, modify, merge, publish,
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12 distribute, sublicense, and/or sell copies of the Software, and to
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13 permit persons to whom the Software is furnished to do so, subject to
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14 the following conditions:
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15
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16 The above copyright notice and this permission notice shall be included
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17 in all copies or substantial portions of the Software.
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18
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19 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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20 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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21 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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22 IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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23 DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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24 OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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25 USE OR OTHER DEALINGS IN THE SOFTWARE.
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26 */
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27
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28 #include <stdint.h>
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29 #include <stdio.h>
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30
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31 #define DO_ATOMICALLY(T, OPERATION) \
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32 int done = 0; \
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33 T old_value; \
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34 T new_value; \
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35 while (!done) \
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36 { \
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37 old_value = *ptr; \
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38 new_value = OPERATION; \
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39 done = __sync_bool_compare_and_swap (ptr, old_value, new_value); \
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40 } \
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41 return old_value
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42
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43 int32_t
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44 __hsail_atomic_min_s32 (int32_t *ptr, int32_t a)
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45 {
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46 DO_ATOMICALLY (int32_t, (old_value < a) ? old_value : a);
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47 }
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48
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49 int64_t
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50 __hsail_atomic_min_s64 (int64_t *ptr, int64_t a)
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51 {
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52 DO_ATOMICALLY (int64_t, (old_value < a) ? old_value : a);
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53 }
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54
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55 uint32_t
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56 __hsail_atomic_min_u32 (uint32_t *ptr, uint32_t a)
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57 {
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58 DO_ATOMICALLY (uint32_t, (old_value < a) ? old_value : a);
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59 }
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60
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61 uint64_t
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62 __hsail_atomic_min_u64 (uint64_t *ptr, uint64_t a)
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63 {
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64 DO_ATOMICALLY (uint64_t, (old_value < a) ? old_value : a);
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65 }
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66
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67 uint32_t
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68 __hsail_atomic_max_u32 (uint32_t *ptr, uint32_t a)
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69 {
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70 DO_ATOMICALLY (uint32_t, (old_value > a) ? old_value : a);
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71 }
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72
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73 int32_t
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74 __hsail_atomic_max_s32 (int32_t *ptr, int32_t a)
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75 {
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76 DO_ATOMICALLY (int32_t, (old_value > a) ? old_value : a);
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77 }
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78
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79 uint64_t
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80 __hsail_atomic_max_u64 (uint64_t *ptr, uint64_t a)
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81 {
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82 DO_ATOMICALLY (uint64_t, (old_value > a) ? old_value : a);
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83 }
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84
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85 int64_t
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86 __hsail_atomic_max_s64 (int64_t *ptr, int64_t a)
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87 {
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88 DO_ATOMICALLY (int64_t, (old_value > a) ? old_value : a);
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89 }
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90
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91 uint32_t
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92 __hsail_atomic_wrapinc_u32 (uint32_t *ptr, uint32_t a)
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93 {
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94 DO_ATOMICALLY (uint32_t, (old_value >= a) ? 0 : (old_value + 1));
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95 }
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96
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97 uint64_t
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98 __hsail_atomic_wrapinc_u64 (uint64_t *ptr, uint64_t a)
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99 {
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100 DO_ATOMICALLY (uint64_t, (old_value >= a) ? 0 : (old_value + 1));
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101 }
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102
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103 uint32_t
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104 __hsail_atomic_wrapdec_u32 (uint32_t *ptr, uint32_t a)
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105 {
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106 DO_ATOMICALLY (uint32_t,
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107 ((old_value == 0) || (old_value > a)) ? a : (old_value - 1));
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108 }
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109
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110 uint64_t
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111 __hsail_atomic_wrapdec_u64 (uint64_t *ptr, uint64_t a)
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112 {
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113 DO_ATOMICALLY (uint64_t,
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114 ((old_value == 0) || (old_value > a)) ? a : (old_value - 1));
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115 }
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