diff options
Diffstat (limited to 'src/os/unix/ngx_gcc_atomic_x86.h')
| -rw-r--r-- | src/os/unix/ngx_gcc_atomic_x86.h | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/src/os/unix/ngx_gcc_atomic_x86.h b/src/os/unix/ngx_gcc_atomic_x86.h index b458032b5..8e3480d71 100644 --- a/src/os/unix/ngx_gcc_atomic_x86.h +++ b/src/os/unix/ngx_gcc_atomic_x86.h @@ -61,7 +61,16 @@ ngx_atomic_cmp_set(ngx_atomic_t *lock, ngx_atomic_uint_t old, */ -#if !(__GNUC__ == 2 && __GNUC_MINOR__ <= 7) +#if !(( __GNUC__ == 2 && __GNUC_MINOR__ <= 7 ) || ( __INTEL_COMPILER >= 800 )) + +/* + * icc 8.1 and 9.0 compile broken code with -march=pentium4 option: + * ngx_atomic_fetch_add() always return the input "add" value, + * so we use the gcc 2.7 version. + * + * icc 8.1 and 9.0 with -march=pentiumpro option or icc 7.1 compile + * correct code. + */ static ngx_inline ngx_atomic_int_t ngx_atomic_fetch_add(ngx_atomic_t *value, ngx_atomic_int_t add) @@ -77,7 +86,7 @@ ngx_atomic_fetch_add(ngx_atomic_t *value, ngx_atomic_int_t add) } -#else /* (__GNUC__ == 2 && __GNUC_MINOR__ <= 7) */ +#else /* * gcc 2.7 does not support "+q", so we have to use the fixed %eax ("=a" and |