Documentation in @file{gcc/doc/extend.texi} for any target-specific
pragmas supported.
@item
-Documentation of any target-specific built-in functions supported.
-FIXME: where should this documentation be? For MMX built-in functions
-it is currently in @file{gcc/doc/invoke.texi}.
+Documentation in @file{gcc/doc/extend.texi} of any target-specific
+built-in functions supported.
@item
Documentation in @file{gcc/doc/md.texi} of any target-specific
constraint letters (@pxref{Machine Constraints, , Constraints for