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| author | John Baldwin <jhb@FreeBSD.org> | 2001-11-12 18:53:45 +0000 |
|---|---|---|
| committer | John Baldwin <jhb@FreeBSD.org> | 2001-11-12 18:53:45 +0000 |
| commit | d9009094398fbdf0e79e8fa16ce715f9f2ab25f7 (patch) | |
| tree | 81c46c09b89483d51c0def1030ae042d50d51893 /sys/i386 | |
| parent | dd05edcb0fec5c4a1385c2c02155e65d6eb354bc (diff) | |
| download | src-d9009094398fbdf0e79e8fa16ce715f9f2ab25f7.tar.gz src-d9009094398fbdf0e79e8fa16ce715f9f2ab25f7.zip | |
Use newer constraints for atomic_cmpset().
Requested by: bde
Notes
Notes:
svn path=/head/; revision=86303
Diffstat (limited to 'sys/i386')
| -rw-r--r-- | sys/i386/include/atomic.h | 20 |
1 files changed, 9 insertions, 11 deletions
diff --git a/sys/i386/include/atomic.h b/sys/i386/include/atomic.h index c3ad67a586c1..0da813316238 100644 --- a/sys/i386/include/atomic.h +++ b/sys/i386/include/atomic.h @@ -120,18 +120,17 @@ atomic_cmpset_int(volatile u_int *dst, u_int exp, u_int src) __asm __volatile( " pushfl ; " " cli ; " - " cmpl %1,%3 ; " + " cmpl %0,%2 ; " " jne 1f ; " - " movl %2,%3 ; " + " movl %1,%2 ; " "1: " " sete %%al; " " movzbl %%al,%0 ; " " popfl ; " "# atomic_cmpset_int" - : "=a" (res) /* 0 (result) */ - : "0" (exp), /* 1 */ - "r" (src), /* 2 */ - "m" (*(dst)) /* 3 */ + : "+a" (res) /* 0 (result) */ + : "r" (src), /* 1 */ + "m" (*(dst)) /* 2 */ : "memory"); return (res); @@ -144,15 +143,14 @@ atomic_cmpset_int(volatile u_int *dst, u_int exp, u_int src) __asm __volatile ( " " MPLOCKED " " - " cmpxchgl %2,%3 ; " + " cmpxchgl %1,%2 ; " " setz %%al ; " " movzbl %%al,%0 ; " "1: " "# atomic_cmpset_int" - : "=a" (res) /* 0 (result) */ - : "0" (exp), /* 1 */ - "r" (src), /* 2 */ - "m" (*(dst)) /* 3 */ + : "+a" (res) /* 0 (result) */ + : "r" (src), /* 1 */ + "m" (*(dst)) /* 2 */ : "memory"); return (res); |