diff mbox series

Clarify -mmovbe documentation

Message ID 20240108095641.D66D8385842A@sourceware.org
State Accepted
Headers
Series Clarify -mmovbe documentation |

Checks

Context Check Description
snail/gcc-patch-check success Github commit url

Commit Message

Richard Biener Jan. 8, 2024, 9:50 a.m. UTC 
  It was noticed that -mmovbe doesn't use movbe for __builtin_bswap{32,64}
when not optimizing.  The follownig adjusts the documentation to
say it will be used for optimizing and applies to all byte swaps,
not just those carried out via builtin function calls.

OK?

Thanks,
Richard.

	* doc/invoke.texi (-mmovbe): Clarify.
---
 gcc/doc/invoke.texi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 68d1f364ac0..8cf99f395a5 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -34708,8 +34708,8 @@  see @ref{Other Builtins} for details.
 
 @opindex mmovbe
 @item -mmovbe
-This option enables use of the @code{movbe} instruction to implement
-@code{__builtin_bswap32} and @code{__builtin_bswap64}.
+This option enables use of the @code{movbe} instruction to optimize
+byte swapping of four and eight byte entities.
 
 @opindex mshstk
 @item -mshstk