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| author | Igor Sysoev <igor@sysoev.ru> | 2006-12-21 15:20:15 +0000 |
|---|---|---|
| committer | Igor Sysoev <igor@sysoev.ru> | 2006-12-21 15:20:15 +0000 |
| commit | 053d1c4da805b6545990031457270f5c7ce973ec (patch) | |
| tree | f43199f1be8c39eba43e2ef521b80a4d970fcb5a /src/os/unix/ngx_gcc_atomic_ppc.h | |
| parent | 4e08b9c17a06e41afda9be9c8b547b1aa3331d2d (diff) | |
| download | nginx-053d1c4da805b6545990031457270f5c7ce973ec.tar.gz nginx-053d1c4da805b6545990031457270f5c7ce973ec.zip | |
larx/stcx. should cycle if the reservation was cleared
Diffstat (limited to 'src/os/unix/ngx_gcc_atomic_ppc.h')
| -rw-r--r-- | src/os/unix/ngx_gcc_atomic_ppc.h | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/src/os/unix/ngx_gcc_atomic_ppc.h b/src/os/unix/ngx_gcc_atomic_ppc.h index 68d244e41..cfa58f92a 100644 --- a/src/os/unix/ngx_gcc_atomic_ppc.h +++ b/src/os/unix/ngx_gcc_atomic_ppc.h @@ -28,15 +28,16 @@ ngx_atomic_cmp_set(ngx_atomic_t *lock, ngx_atomic_uint_t old, __asm__ volatile ( " li %0, 0 \n" /* preset "0" to "res" */ + "1: \n" " ldarx %1, 0, %2 \n" /* load from [lock] into "temp" */ /* and store reservation */ " cmpd %1, %3 \n" /* compare "temp" and "old" */ - " bne- 1f \n" /* not equal */ + " bne- 2f \n" /* not equal */ " stdcx. %4, 0, %2 \n" /* store "set" into [lock] if reservation */ /* is not cleared */ - " bne- 1f \n" /* the reservation was cleared */ + " bne- 1b \n" /* the reservation was cleared */ " li %0, 1 \n" /* set "1" to "res" */ - "1: \n" + "2: \n" : "=&b" (res), "=&b" (temp) : "b" (lock), "b" (old), "b" (set) @@ -85,15 +86,16 @@ ngx_atomic_cmp_set(ngx_atomic_t *lock, ngx_atomic_uint_t old, __asm__ volatile ( " li %0, 0 \n" /* preset "0" to "res" */ + "1: \n" " lwarx %1, 0, %2 \n" /* load from [lock] into "temp" */ /* and store reservation */ " cmpw %1, %3 \n" /* compare "temp" and "old" */ - " bne- 1f \n" /* not equal */ + " bne- 2f \n" /* not equal */ " stwcx. %4, 0, %2 \n" /* store "set" into [lock] if reservation */ /* is not cleared */ - " bne- 1f \n" /* the reservation was cleared */ + " bne- 1b \n" /* the reservation was cleared */ " li %0, 1 \n" /* set "1" to "res" */ - "1: \n" + "2: \n" : "=&b" (res), "=&b" (temp) : "b" (lock), "b" (old), "b" (set) |