Merge lp:~vkolesnikov/pbxt/pbxt-atomic-inc into lp:pbxt

[Vladimir Kolesnikov]

[Vladimir Kolesnikov (vkolesnikov)]

changed ADD to INC, fixed a bug in Linux asm code

=== modified file 'src/lock_xt.h'
--- src/lock_xt.h	2009-03-05 13:31:40 +0000
+++ src/lock_xt.h	2009-03-06 09:59:56 +0000
@@ -195,12 +195,10 @@
 inline void xt_atomic_inc2(volatile xtWord2 *mptr)
 {
 #ifdef XT_SPL_WIN32_ASM
-	__asm LOCK ADD	WORD PTR mptr, 1
+	__asm LOCK INC	WORD PTR mptr
 #elif defined(XT_SPL_GNUC_X86)
 #ifdef XT_HAVE_XADD
-	xtWord2 inc = 1;
-
-	asm volatile ("lock; addw %0, %1" : "+r" (inc) : "m" (*mptr) : "memory");
+        asm volatile ("lock; incw %0" : : "m" (*mptr) : "memory");
 #else
 	xtWord2 val1, val2;
 
@@ -222,12 +220,10 @@
 inline void xt_atomic_dec2(volatile xtWord2 *mptr)
 {
 #ifdef XT_SPL_WIN32_ASM
-	__asm LOCK SUB	WORD PTR mptr, 1
+	__asm LOCK DEC	WORD PTR mptr
 #elif defined(XT_SPL_GNUC_X86)
 #ifdef XT_HAVE_XADD
-        xtWord2 inc = -1;
-
-        asm volatile ("lock; subw %0, %1" : "+r" (inc) : "m" (*mptr) : "memory");
+	asm volatile ("lock; decw %0" : : "m" (*mptr) : "memory");
 #else
 	xtWord2 val1, val2;