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| author | Kwok Cheung Yeung <kcy@codesourcery.com> | 2020-01-09 15:35:14 +0000 |
|---|---|---|
| committer | Kwok Cheung Yeung <kcy@gcc.gnu.org> | 2020-01-09 15:35:14 +0000 |
| commit | d6491d15676b0255eaaa4f5394fbb8ec7e3c6a5f (patch) | |
| tree | d132711071512cdee9c5378d5f8ca89a408f4e38 /libgcc | |
| parent | bad5e58a9fdbf6c090ff2adcc4022e1788173ccb (diff) | |
| download | gcc-d6491d15676b0255eaaa4f5394fbb8ec7e3c6a5f.zip gcc-d6491d15676b0255eaaa4f5394fbb8ec7e3c6a5f.tar.gz gcc-d6491d15676b0255eaaa4f5394fbb8ec7e3c6a5f.tar.bz2 | |
[amdgcn] Add support for sub-word sync_compare_and_swap operations
2020-01-09 Kwok Cheung Yeung <kcy@codesourcery.com>
libgcc/
* config/gcn/atomic.c: New.
* config/gcn/t-amdgcn (LIB2ADD): Add atomic.c.
From-SVN: r280055
Diffstat (limited to 'libgcc')
| -rw-r--r-- | libgcc/ChangeLog | 5 | ||||
| -rw-r--r-- | libgcc/config/gcn/atomic.c | 60 | ||||
| -rw-r--r-- | libgcc/config/gcn/t-amdgcn | 3 |
3 files changed, 67 insertions, 1 deletions
diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog index 08e96e5..d72249d 100644 --- a/libgcc/ChangeLog +++ b/libgcc/ChangeLog @@ -1,3 +1,8 @@ +2020-01-09 Kwok Cheung Yeung <kcy@codesourcery.com> + + * config/gcn/atomic.c: New. + * config/gcn/t-amdgcn (LIB2ADD): Add atomic.c. + 2020-01-08 Georg-Johann Lay <avr@gjlay.de> Implement 64-bit double functions. diff --git a/libgcc/config/gcn/atomic.c b/libgcc/config/gcn/atomic.c new file mode 100644 index 0000000..214c9a5 --- /dev/null +++ b/libgcc/config/gcn/atomic.c @@ -0,0 +1,60 @@ +/* AMD GCN atomic operations + Copyright (C) 2020 Free Software Foundation, Inc. + Contributed by Mentor Graphics. + + This file is free software; you can redistribute it and/or modify it + under the terms of the GNU General Public License as published by the + Free Software Foundation; either version 3, or (at your option) any + later version. + + This file is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + Under Section 7 of GPL version 3, you are granted additional + permissions described in the GCC Runtime Library Exception, version + 3.1, as published by the Free Software Foundation. + + You should have received a copy of the GNU General Public License and + a copy of the GCC Runtime Library Exception along with this program; + see the files COPYING3 and COPYING.RUNTIME respectively. If not, see + <http://www.gnu.org/licenses/>. */ + +#include <stdbool.h> +#include <stdint.h> + +#define __SYNC_SUBWORD_COMPARE_AND_SWAP(TYPE, SIZE) \ + \ +TYPE \ +__sync_val_compare_and_swap_##SIZE (TYPE *ptr, TYPE oldval, TYPE newval) \ +{ \ + unsigned int *wordptr = (unsigned int *)((uintptr_t) ptr & ~3UL); \ + int shift = ((uintptr_t) ptr & 3UL) * 8; \ + unsigned int valmask = (1 << (SIZE * 8)) - 1; \ + unsigned int wordmask = ~(valmask << shift); \ + unsigned int oldword = *wordptr; \ + for (;;) \ + { \ + TYPE prevval = (oldword >> shift) & valmask; \ + if (__builtin_expect (prevval != oldval, 0)) \ + return prevval; \ + unsigned int newword = oldword & wordmask; \ + newword |= ((unsigned int) newval) << shift; \ + unsigned int prevword \ + = __sync_val_compare_and_swap_4 (wordptr, oldword, newword); \ + if (__builtin_expect (prevword == oldword, 1)) \ + return oldval; \ + oldword = prevword; \ + } \ +} \ + \ +bool \ +__sync_bool_compare_and_swap_##SIZE (TYPE *ptr, TYPE oldval, TYPE newval) \ +{ \ + return __sync_val_compare_and_swap_##SIZE (ptr, oldval, newval) == oldval; \ +} + +__SYNC_SUBWORD_COMPARE_AND_SWAP (unsigned char, 1) +__SYNC_SUBWORD_COMPARE_AND_SWAP (unsigned short, 2) + diff --git a/libgcc/config/gcn/t-amdgcn b/libgcc/config/gcn/t-amdgcn index adbd866..fe7b5fa 100644 --- a/libgcc/config/gcn/t-amdgcn +++ b/libgcc/config/gcn/t-amdgcn @@ -1,4 +1,5 @@ -LIB2ADD += $(srcdir)/config/gcn/lib2-divmod.c \ +LIB2ADD += $(srcdir)/config/gcn/atomic.c \ + $(srcdir)/config/gcn/lib2-divmod.c \ $(srcdir)/config/gcn/lib2-divmod-hi.c \ $(srcdir)/config/gcn/unwind-gcn.c |