summaryrefslogtreecommitdiff
path: root/include/atomic/x86-gcc.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/atomic/x86-gcc.h')
-rw-r--r--include/atomic/x86-gcc.h58
1 files changed, 0 insertions, 58 deletions
diff --git a/include/atomic/x86-gcc.h b/include/atomic/x86-gcc.h
deleted file mode 100644
index d79dadbf05e..00000000000
--- a/include/atomic/x86-gcc.h
+++ /dev/null
@@ -1,58 +0,0 @@
-/* Copyright (C) 2006 MySQL AB
-
- This program 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; version 2 of the License.
-
- This program 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.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
-
-/*
- XXX 64-bit atomic operations can be implemented using
- cmpxchg8b, if necessary. Though I've heard that not all 64-bit
- architectures support double-word (128-bit) cas.
-*/
-
-#ifdef MY_ATOMIC_NO_XADD
-#define MY_ATOMIC_MODE "gcc-x86" LOCK "-no-xadd"
-#else
-#define MY_ATOMIC_MODE "gcc-x86" LOCK
-#endif
-
-/* fix -ansi errors while maintaining readability */
-#ifndef asm
-#define asm __asm__
-#endif
-
-#ifndef MY_ATOMIC_NO_XADD
-#define make_atomic_add_body(S) \
- asm volatile (LOCK "; xadd %0, %1;" : "+r" (v) , "+m" (*a))
-#endif
-#define make_atomic_swap_body(S) \
- asm volatile ("; xchg %0, %1;" : "+r" (v) , "+m" (*a))
-#define make_atomic_cas_body(S) \
- asm volatile (LOCK "; cmpxchg %3, %0; setz %2;" \
- : "+m" (*a), "+a" (*cmp), "=q" (ret): "r" (set))
-
-#ifdef MY_ATOMIC_MODE_DUMMY
-#define make_atomic_load_body(S) ret=*a
-#define make_atomic_store_body(S) *a=v
-#else
-/*
- Actually 32-bit reads/writes are always atomic on x86
- But we add LOCK here anyway to force memory barriers
-*/
-#define make_atomic_load_body(S) \
- ret=0; \
- asm volatile (LOCK "; cmpxchg %2, %0" \
- : "+m" (*a), "+a" (ret): "r" (ret))
-#define make_atomic_store_body(S) \
- asm volatile ("; xchg %0, %1;" : "+m" (*a) : "r" (v))
-#endif
-