From: Joern Rennecke <amylaar@gcc.gnu.org>
Date: Mon, 3 Feb 1997 18:17:13 +0000 (+0000)
Subject: Update comment about BSR.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=4ed4cb9a0360080746a2d2fad2d2a875f122230c;p=gcc.git

Update comment about BSR.

From-SVN: r13601
---

diff --git a/gcc/config/sh/sh.md b/gcc/config/sh/sh.md
index c9ce22a654a..0ff08aad635 100644
--- a/gcc/config/sh/sh.md
+++ b/gcc/config/sh/sh.md
@@ -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