diff options
Diffstat (limited to 'app/nginx/src/os/unix/ngx_gcc_atomic_ppc.h')
| -rw-r--r-- | app/nginx/src/os/unix/ngx_gcc_atomic_ppc.h | 155 |
1 files changed, 0 insertions, 155 deletions
diff --git a/app/nginx/src/os/unix/ngx_gcc_atomic_ppc.h b/app/nginx/src/os/unix/ngx_gcc_atomic_ppc.h deleted file mode 100644 index 45afc4b..0000000 --- a/app/nginx/src/os/unix/ngx_gcc_atomic_ppc.h +++ /dev/null @@ -1,155 +0,0 @@ - -/* - * Copyright (C) Igor Sysoev - * Copyright (C) Nginx, Inc. - */ - - -/* - * The ppc assembler treats ";" as comment, so we have to use "\n". - * The minus in "bne-" is a hint for the branch prediction unit that - * this branch is unlikely to be taken. - * The "1b" means the nearest backward label "1" and the "1f" means - * the nearest forward label "1". - * - * The "b" means that the base registers can be used only, i.e. - * any register except r0. The r0 register always has a zero value and - * could not be used in "addi r0, r0, 1". - * The "=&b" means that no input registers can be used. - * - * "sync" read and write barriers - * "isync" read barrier, is faster than "sync" - * "eieio" write barrier, is faster than "sync" - * "lwsync" write barrier, is faster than "eieio" on ppc64 - */ - -#if (NGX_PTR_SIZE == 8) - -static ngx_inline ngx_atomic_uint_t -ngx_atomic_cmp_set(ngx_atomic_t *lock, ngx_atomic_uint_t old, - ngx_atomic_uint_t set) -{ - ngx_atomic_uint_t res, temp; - - __asm__ volatile ( - - " li %0, 0 \n" /* preset "0" to "res" */ - " lwsync \n" /* write barrier */ - "1: \n" - " ldarx %1, 0, %2 \n" /* load from [lock] into "temp" */ - /* and store reservation */ - " cmpd %1, %3 \n" /* compare "temp" and "old" */ - " bne- 2f \n" /* not equal */ - " stdcx. %4, 0, %2 \n" /* store "set" into [lock] if reservation */ - /* is not cleared */ - " bne- 1b \n" /* the reservation was cleared */ - " isync \n" /* read barrier */ - " li %0, 1 \n" /* set "1" to "res" */ - "2: \n" - - : "=&b" (res), "=&b" (temp) - : "b" (lock), "b" (old), "b" (set) - : "cc", "memory"); - - return res; -} - - -static ngx_inline ngx_atomic_int_t -ngx_atomic_fetch_add(ngx_atomic_t *value, ngx_atomic_int_t add) -{ - ngx_atomic_uint_t res, temp; - - __asm__ volatile ( - - " lwsync \n" /* write barrier */ - "1: ldarx %0, 0, %2 \n" /* load from [value] into "res" */ - /* and store reservation */ - " add %1, %0, %3 \n" /* "res" + "add" store in "temp" */ - " stdcx. %1, 0, %2 \n" /* store "temp" into [value] if reservation */ - /* is not cleared */ - " bne- 1b \n" /* try again if reservation was cleared */ - " isync \n" /* read barrier */ - - : "=&b" (res), "=&b" (temp) - : "b" (value), "b" (add) - : "cc", "memory"); - - return res; -} - - -#if (NGX_SMP) -#define ngx_memory_barrier() \ - __asm__ volatile ("isync \n lwsync \n" ::: "memory") -#else -#define ngx_memory_barrier() __asm__ volatile ("" ::: "memory") -#endif - -#else - -static ngx_inline ngx_atomic_uint_t -ngx_atomic_cmp_set(ngx_atomic_t *lock, ngx_atomic_uint_t old, - ngx_atomic_uint_t set) -{ - ngx_atomic_uint_t res, temp; - - __asm__ volatile ( - - " li %0, 0 \n" /* preset "0" to "res" */ - " eieio \n" /* write barrier */ - "1: \n" - " lwarx %1, 0, %2 \n" /* load from [lock] into "temp" */ - /* and store reservation */ - " cmpw %1, %3 \n" /* compare "temp" and "old" */ - " bne- 2f \n" /* not equal */ - " stwcx. %4, 0, %2 \n" /* store "set" into [lock] if reservation */ - /* is not cleared */ - " bne- 1b \n" /* the reservation was cleared */ - " isync \n" /* read barrier */ - " li %0, 1 \n" /* set "1" to "res" */ - "2: \n" - - : "=&b" (res), "=&b" (temp) - : "b" (lock), "b" (old), "b" (set) - : "cc", "memory"); - - return res; -} - - -static ngx_inline ngx_atomic_int_t -ngx_atomic_fetch_add(ngx_atomic_t *value, ngx_atomic_int_t add) -{ - ngx_atomic_uint_t res, temp; - - __asm__ volatile ( - - " eieio \n" /* write barrier */ - "1: lwarx %0, 0, %2 \n" /* load from [value] into "res" */ - /* and store reservation */ - " add %1, %0, %3 \n" /* "res" + "add" store in "temp" */ - " stwcx. %1, 0, %2 \n" /* store "temp" into [value] if reservation */ - /* is not cleared */ - " bne- 1b \n" /* try again if reservation was cleared */ - " isync \n" /* read barrier */ - - : "=&b" (res), "=&b" (temp) - : "b" (value), "b" (add) - : "cc", "memory"); - - return res; -} - - -#if (NGX_SMP) -#define ngx_memory_barrier() \ - __asm__ volatile ("isync \n eieio \n" ::: "memory") -#else -#define ngx_memory_barrier() __asm__ volatile ("" ::: "memory") -#endif - -#endif - - -#define ngx_cpu_pause() |