Doc: Explicitly document extensions implied by -march=x86_64 [PR97585]

gcc/ChangeLog
	PR target/97585
	* doc/invoke.texi (x86 Options): Document list of extensions
	supported by -march=x86_64, according to the declaration of
	PTA_X86_64_BASELINE in config/i386/i386.h.

diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 4be80a7f7f9a39de7891a9d16c08b20946129592..fbaa29f49258b3fce1f3db768f9ef12a93d47ee7 100644 (file)
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -34838,7 +34838,8 @@ produces code optimized for the local machine under the constraints
 of the selected instruction set.
 
 @item x86-64
-A generic CPU with 64-bit extensions.
+A generic CPU with 64-bit extensions, MMX, SSE, SSE2, and FXSR instruction set
+support.
 
 @item x86-64-v2
 @itemx x86-64-v3