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116 lines
3.2 KiB
C
116 lines
3.2 KiB
C
/* atomic.c -- Builtins for HSAIL atomic instructions for which
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there is no feasible direct gcc GENERIC expression.
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Copyright (C) 2015-2017 Free Software Foundation, Inc.
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Contributed by Pekka Jaaskelainen <pekka.jaaskelainen@parmance.com>
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for General Processor Tech.
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files
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(the "Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <stdint.h>
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#include <stdio.h>
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#define DO_ATOMICALLY(T, OPERATION) \
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int done = 0; \
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T old_value; \
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T new_value; \
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while (!done) \
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{ \
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old_value = *ptr; \
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new_value = OPERATION; \
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done = __sync_bool_compare_and_swap (ptr, old_value, new_value); \
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} \
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return old_value
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int32_t
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__hsail_atomic_min_s32 (int32_t *ptr, int32_t a)
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{
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DO_ATOMICALLY (int32_t, (old_value < a) ? old_value : a);
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}
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int64_t
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__hsail_atomic_min_s64 (int64_t *ptr, int64_t a)
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{
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DO_ATOMICALLY (int64_t, (old_value < a) ? old_value : a);
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}
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uint32_t
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__hsail_atomic_min_u32 (uint32_t *ptr, uint32_t a)
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{
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DO_ATOMICALLY (uint32_t, (old_value < a) ? old_value : a);
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}
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uint64_t
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__hsail_atomic_min_u64 (uint64_t *ptr, uint64_t a)
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{
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DO_ATOMICALLY (uint64_t, (old_value < a) ? old_value : a);
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}
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uint32_t
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__hsail_atomic_max_u32 (uint32_t *ptr, uint32_t a)
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{
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DO_ATOMICALLY (uint32_t, (old_value > a) ? old_value : a);
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}
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int32_t
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__hsail_atomic_max_s32 (int32_t *ptr, int32_t a)
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{
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DO_ATOMICALLY (int32_t, (old_value > a) ? old_value : a);
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}
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uint64_t
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__hsail_atomic_max_u64 (uint64_t *ptr, uint64_t a)
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{
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DO_ATOMICALLY (uint64_t, (old_value > a) ? old_value : a);
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}
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int64_t
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__hsail_atomic_max_s64 (int64_t *ptr, int64_t a)
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{
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DO_ATOMICALLY (int64_t, (old_value > a) ? old_value : a);
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}
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uint32_t
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__hsail_atomic_wrapinc_u32 (uint32_t *ptr, uint32_t a)
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{
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DO_ATOMICALLY (uint32_t, (old_value >= a) ? 0 : (old_value + 1));
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}
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uint64_t
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__hsail_atomic_wrapinc_u64 (uint64_t *ptr, uint64_t a)
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{
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DO_ATOMICALLY (uint64_t, (old_value >= a) ? 0 : (old_value + 1));
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}
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uint32_t
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__hsail_atomic_wrapdec_u32 (uint32_t *ptr, uint32_t a)
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{
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DO_ATOMICALLY (uint32_t,
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((old_value == 0) || (old_value > a)) ? a : (old_value - 1));
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}
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uint64_t
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__hsail_atomic_wrapdec_u64 (uint64_t *ptr, uint64_t a)
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{
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DO_ATOMICALLY (uint64_t,
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((old_value == 0) || (old_value > a)) ? a : (old_value - 1));
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}
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