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Update comment about BSR. 

From-SVN: r13601
This commit is contained in:
Joern Rennecke 1997-02-03 18:17:13 +00:00
parent 47c8cf9147
commit 4ed4cb9a03
1 changed files with 4 additions and 8 deletions
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12
gcc/config/sh/sh.md
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@ -29,20 +29,16 @@
;; ??? 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