;; ??? Should check all DImode patterns for consistency and usefulness.
-;; ??? Should add support for using BSR for short function calls.
-
;; ??? The MAC.W and MAC.L instructions are not supported. There is no
;; way to generate them.
-;; ??? The BSR instruction is not supported. It might be possible to
-;; generate it by keeping track of function sizes (and hence relative
-;; addresses), and then using it only if the target is earlier in the same
-;; file, and is within range. Better would be assembler/linker relaxing,
-;; but that is much harder.
-
;; ??? The cmp/str instruction is not supported. Perhaps it can be used
;; for a str* inline function.
+;; BSR is not generated by the compiler proper, but when relaxing, it
+;; generates .uses pseudo-ops that allow linker relaxation to create
+;; BSR. This is actually implemented in bfd/{coff,elf32}-sh.c
+
;; Special constraints for SH machine description:
;;
;; t -- T