diff options
| author | Chris Robinson <[email protected]> | 2023-05-26 22:45:53 -0700 |
|---|---|---|
| committer | Chris Robinson <[email protected]> | 2023-05-26 22:45:53 -0700 |
| commit | 17b1b31320079d88bb80ba7da9504fd91231cd85 (patch) | |
| tree | d048ab1bf71f3b8616e92d5addb3e6b15a1a25ef /common/threads.h | |
| parent | 453677bc983a5c17a6d4426e845114bb7be9b770 (diff) | |
Update and clarify a comment
Diffstat (limited to 'common/threads.h')
| -rw-r--r-- | common/threads.h | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/common/threads.h b/common/threads.h index 1cdb5d8f..59fccd12 100644 --- a/common/threads.h +++ b/common/threads.h @@ -2,10 +2,13 @@ #define AL_THREADS_H #if defined(__GNUC__) && defined(__i386__) -/* force_align_arg_pointer is required for proper function arguments aligning - * when SSE code is used. Some systems (Windows, QNX) do not guarantee our - * thread functions will be properly aligned on the stack, even though GCC may - * generate code with the assumption that it is. */ +/* force_align_arg_pointer may be required for proper stack alignment when SSE + * code is used. GCC generates code with the assumption the stack pointer is + * suitably aligned, while some systems (Windows, QNX) do not guarantee non- + * exported functions will be properly aligned when called externally, and + * older apps for other systems may have been built with a lower stack + * alignment than expected by newer builds. + */ #define FORCE_ALIGN __attribute__((force_align_arg_pointer)) #else #define FORCE_ALIGN |