diff options
Diffstat (limited to 'src/os/unix')
| -rw-r--r-- | src/os/unix/ngx_atomic.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/src/os/unix/ngx_atomic.h b/src/os/unix/ngx_atomic.h index 9710855aa..b3d300314 100644 --- a/src/os/unix/ngx_atomic.h +++ b/src/os/unix/ngx_atomic.h @@ -308,8 +308,9 @@ typedef volatile ngx_atomic_uint_t ngx_atomic_t; * this branch is unlikely to be taken. * * the "=&r" means that no input registers can be used. - * the "=&b" means that the base registers can be used only, i.e. any register - * except r0. the r0 register can not be used in "addi r0, r0, 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 "1b" means the nearest backward label "1" and the "1f" means * the nearest forward label "1". */ |