Author: jkim
Date: Wed Aug 21 21:30:06 2013
New Revision: 254614
URL: http://svnweb.freebsd.org/changeset/base/254614
Log:
- Remove the "a" constraint from main output operand for atomic_cmpset().
- Use "+" modifier for the "expect" because it is also an output (unused).
Modified:
head/sys/amd64/include/atomic.h
head/sys/i386/include/atomic.h
Modified: head/sys/amd64/include/atomic.h
==============================================================================
--- head/sys/amd64/include/atomic.h Wed Aug 21 21:20:16 2013
(r254613)
+++ head/sys/amd64/include/atomic.h Wed Aug 21 21:30:06 2013
(r254614)
@@ -138,13 +138,13 @@ atomic_cmpset_int(volatile u_int *dst, u
__asm __volatile(
" " MPLOCKED " "
- " cmpxchgl %2,%1 ; "
+ " cmpxchgl %3,%1 ; "
" sete %0 ; "
"# atomic_cmpset_int"
- : "=a" (res), /* 0 */
- "+m" (*dst) /* 1 */
- : "r" (src), /* 2 */
- "a" (expect) /* 3 */
+ : "=q" (res), /* 0 */
+ "+m" (*dst), /* 1 */
+ "+a" (expect) /* 2 */
+ : "r" (src) /* 3 */
: "memory", "cc");
return (res);
@@ -157,13 +157,13 @@ atomic_cmpset_long(volatile u_long *dst,
__asm __volatile(
" " MPLOCKED " "
- " cmpxchgq %2,%1 ; "
+ " cmpxchgq %3,%1 ; "
" sete %0 ; "
"# atomic_cmpset_long"
- : "=a" (res), /* 0 */
- "+m" (*dst) /* 1 */
- : "r" (src), /* 2 */
- "a" (expect) /* 3 */
+ : "=q" (res), /* 0 */
+ "+m" (*dst), /* 1 */
+ "+a" (expect) /* 2 */
+ : "r" (src) /* 3 */
: "memory", "cc");
return (res);
Modified: head/sys/i386/include/atomic.h
==============================================================================
--- head/sys/i386/include/atomic.h Wed Aug 21 21:20:16 2013
(r254613)
+++ head/sys/i386/include/atomic.h Wed Aug 21 21:30:06 2013
(r254614)
@@ -243,13 +243,13 @@ atomic_cmpset_int(volatile u_int *dst, u
__asm __volatile(
" " MPLOCKED " "
- " cmpxchgl %2,%1 ; "
+ " cmpxchgl %3,%1 ; "
" sete %0 ; "
"# atomic_cmpset_int"
- : "=a" (res), /* 0 */
- "+m" (*dst) /* 1 */
- : "r" (src), /* 2 */
- "a" (expect) /* 3 */
+ : "=q" (res), /* 0 */
+ "+m" (*dst), /* 1 */
+ "+a" (expect) /* 2 */
+ : "r" (src) /* 3 */
: "memory", "cc");
return (res);
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