|
110
|
1 /
|
|
|
2 / Copyright (C) Igor Sysoev
|
|
|
3 /
|
|
|
4
|
|
|
5 / ngx_atomic_uint_t ngx_atomic_cmp_set(ngx_atomic_t *lock,
|
|
|
6 / ngx_atomic_uint_t old, ngx_atomic_uint_t set);
|
|
|
7 /
|
|
|
8 / the arguments are passed in %rdi, %rsi, %rdx
|
|
|
9 / the result is returned in the %rax
|
|
|
10
|
|
|
11 .inline ngx_atomic_cmp_set,0
|
|
|
12 movq %rsi, %rax
|
|
|
13 lock
|
|
|
14 cmpxchgq %rdx, (%rdi)
|
|
|
15 setz %al
|
|
|
16 movzbq %al, %rax
|
|
|
17 .end
|
|
|
18
|
|
|
19
|
|
|
20 / ngx_atomic_int_t ngx_atomic_fetch_add(ngx_atomic_t *value,
|
|
|
21 / ngx_atomic_int_t add);
|
|
|
22 /
|
|
|
23 / the arguments are passed in %rdi, %rsi
|
|
|
24 / the result is returned in the %rax
|
|
|
25
|
|
|
26 .inline ngx_atomic_fetch_add,0
|
|
|
27 movq %rsi, %rax
|
|
|
28 lock
|
|
|
29 xaddq %rax, (%rdi)
|
|
|
30 .end
|
|
320
|
31
|
|
|
32
|
|
|
33 / ngx_cpu_pause()
|
|
579
|
34 /
|
|
|
35 / the "rep; nop" is used instead of "pause" to avoid the "[ PAUSE ]" hardware
|
|
|
36 / capability added by linker because Solaris/amd64 does not know about it:
|
|
|
37 /
|
|
|
38 / ld.so.1: nginx: fatal: hardware capability unsupported: 0x2000 [ PAUSE ]
|
|
320
|
39
|
|
|
40 .inline ngx_cpu_pause,0
|
|
579
|
41 rep; nop
|
|
320
|
42 .end
|
