[PATCH 2/3] port.h: Make use of compiler support for 64bit atomic ops.
Grazvydas Ignotas
notasas at gmail.com
Mon May 11 19:17:36 CDT 2015
1Ghz ARM Cortex-A8 can call RtlInterlockedCompareExchange64:
before this patch: ~3.6M times
after this patch: ~11.5M times
improvement: ~3.2x
---
include/wine/port.h | 12 +++++++++---
libs/port/interlocked.c | 2 ++
2 files changed, 11 insertions(+), 3 deletions(-)
diff --git a/include/wine/port.h b/include/wine/port.h
index 16127e0..4910f34 100644
--- a/include/wine/port.h
+++ b/include/wine/port.h
@@ -367,8 +367,6 @@ extern int _spawnvp(int mode, const char *cmdname, const char * const argv[]);
#if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
-extern __int64 interlocked_cmpxchg64( __int64 *dest, __int64 xchg, __int64 compare );
-
static inline int interlocked_cmpxchg( int *dest, int xchg, int compare )
{
int ret;
@@ -459,7 +457,6 @@ extern int interlocked_xchg( int *dest, int val );
#endif
extern void *interlocked_cmpxchg_ptr( void **dest, void *xchg, void *compare );
-extern __int64 interlocked_cmpxchg64( __int64 *dest, __int64 xchg, __int64 compare );
extern void *interlocked_xchg_ptr( void **dest, void *val );
#if defined(__x86_64__) || defined(__aarch64__) || defined(_WIN64)
extern unsigned char interlocked_cmpxchg128( __int64 *dest, __int64 xchg_high,
@@ -468,6 +465,15 @@ extern unsigned char interlocked_cmpxchg128( __int64 *dest, __int64 xchg_high,
#endif /* __GNUC__ */
+#ifdef __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8
+static inline __int64 interlocked_cmpxchg64( __int64 *dest, __int64 xchg, __int64 compare )
+{
+ return __sync_val_compare_and_swap( dest, compare, xchg );
+}
+#else
+extern __int64 interlocked_cmpxchg64( __int64 *dest, __int64 xchg, __int64 compare );
+#endif
+
#else /* NO_LIBWINE_PORT */
#define __WINE_NOT_PORTABLE(func) func##_is_not_portable func##_is_not_portable
diff --git a/libs/port/interlocked.c b/libs/port/interlocked.c
index e5b1bb9..b63c50a 100644
--- a/libs/port/interlocked.c
+++ b/libs/port/interlocked.c
@@ -302,6 +302,7 @@ void *interlocked_cmpxchg_ptr( void **dest, void *xchg, void *compare )
return compare;
}
+#ifndef __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8
__int64 interlocked_cmpxchg64( __int64 *dest, __int64 xchg, __int64 compare )
{
pthread_mutex_lock( &interlocked_mutex );
@@ -314,6 +315,7 @@ __int64 interlocked_cmpxchg64( __int64 *dest, __int64 xchg, __int64 compare )
pthread_mutex_unlock( &interlocked_mutex );
return compare;
}
+#endif
#ifndef __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4
int interlocked_xchg( int *dest, int val )
--
1.9.1
More information about the wine-patches
mailing list