Alexandre Julliard : libport: Added an interlocked_cmpxchg128 function for 64-bit.
Alexandre Julliard
julliard at winehq.org
Tue Sep 1 11:05:27 CDT 2009
Module: wine
Branch: master
Commit: 192fcc5bb31e6921c3eb6a700f30892dd24c62d4
URL: http://source.winehq.org/git/wine.git/?a=commit;h=192fcc5bb31e6921c3eb6a700f30892dd24c62d4
Author: Alexandre Julliard <julliard at winehq.org>
Date: Tue Sep 1 12:39:17 2009 +0200
libport: Added an interlocked_cmpxchg128 function for 64-bit.
---
include/wine/port.h | 20 ++++++++++++++++++++
libs/port/interlocked.c | 23 +++++++++++++++++------
2 files changed, 37 insertions(+), 6 deletions(-)
diff --git a/include/wine/port.h b/include/wine/port.h
index 0fc877c..61c8399 100644
--- a/include/wine/port.h
+++ b/include/wine/port.h
@@ -412,6 +412,22 @@ extern inline int interlocked_xchg_add( int *dest, int incr )
return ret;
}
+#ifdef __x86_64__
+extern inline unsigned char interlocked_cmpxchg128( __int64 *dest, __int64 xchg_high,
+ __int64 xchg_low, __int64 *compare );
+extern inline unsigned char interlocked_cmpxchg128( __int64 *dest, __int64 xchg_high,
+ __int64 xchg_low, __int64 *compare )
+{
+ unsigned char ret;
+ __asm__ __volatile__( "lock cmpxchg16b %0; setz %b2"
+ : "=m" (dest[0]), "=m" (dest[1]), "=r" (ret),
+ "=a" (compare[0]), "=d" (compare[1])
+ : "m" (dest[0]), "m" (dest[1]), "3" (compare[0]), "4" (compare[1]),
+ "c" (xchg_high), "b" (xchg_low) );
+ return ret;
+}
+#endif
+
#else /* __GNUC__ */
extern int interlocked_cmpxchg( int *dest, int xchg, int compare );
@@ -420,6 +436,10 @@ extern __int64 interlocked_cmpxchg64( __int64 *dest, __int64 xchg, __int64 compa
extern int interlocked_xchg( int *dest, int val );
extern void *interlocked_xchg_ptr( void **dest, void *val );
extern int interlocked_xchg_add( int *dest, int incr );
+#ifdef _WIN64
+extern unsigned char interlocked_cmpxchg128( __int64 *dest, __int64 xchg_high,
+ __int64 xchg_low, __int64 *compare );
+#endif
#endif /* __GNUC__ */
diff --git a/libs/port/interlocked.c b/libs/port/interlocked.c
index cefbb5e..c2ac3eb 100644
--- a/libs/port/interlocked.c
+++ b/libs/port/interlocked.c
@@ -139,8 +139,6 @@ __declspec(naked) int interlocked_xchg_add( int *dest, int incr )
#elif defined(__x86_64__)
-#ifdef __GNUC__
-
__ASM_GLOBAL_FUNC(interlocked_cmpxchg,
"mov %edx, %eax\n\t"
"lock cmpxchgl %esi,(%rdi)\n\t"
@@ -165,10 +163,23 @@ __ASM_GLOBAL_FUNC(interlocked_xchg_add,
"mov %esi, %eax\n\t"
"lock xaddl %eax, (%rdi)\n\t"
"ret")
-
-#else
-# error You must implement the interlocked* functions for your compiler
-#endif
+__ASM_GLOBAL_FUNC(interlocked_cmpxchg128,
+ "push %rbx\n\t"
+ ".cfi_adjust_cfa_offset 8\n\t"
+ ".cfi_rel_offset %rbx,0\n\t"
+ "mov %rcx,%r8\n\t" /* compare */
+ "mov %rdx,%rbx\n\t" /* xchg_low */
+ "mov %rsi,%rcx\n\t" /* xchg_high */
+ "mov 0(%r8),%rax\n\t"
+ "mov 8(%r8),%rdx\n\t"
+ "lock cmpxchg16b (%rdi)\n\t"
+ "mov %rax,0(%r8)\n\t"
+ "mov %rdx,8(%r8)\n\t"
+ "setz %al\n\t"
+ "pop %rbx\n\t"
+ ".cfi_adjust_cfa_offset -8\n\t"
+ ".cfi_same_value %rbx\n\t"
+ "ret")
#elif defined(__powerpc__)
void* interlocked_cmpxchg_ptr( void **dest, void* xchg, void* compare)
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