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| author | Joern Rennecke <amylaar@gcc.gnu.org> | 1997-02-03 18:17:13 +0000 |
|---|---|---|
| committer | Joern Rennecke <amylaar@gcc.gnu.org> | 1997-02-03 18:17:13 +0000 |
| commit | 4ed4cb9a0360080746a2d2fad2d2a875f122230c (patch) | |
| tree | af492184fe9d8c3577dfb94ab0fc7af4e313ba14 /gcc | |
| parent | 47c8cf914763cec943ddafe373cf75f64d93c5a3 (diff) | |
| download | gcc-4ed4cb9a0360080746a2d2fad2d2a875f122230c.zip gcc-4ed4cb9a0360080746a2d2fad2d2a875f122230c.tar.gz gcc-4ed4cb9a0360080746a2d2fad2d2a875f122230c.tar.bz2 | |
Update comment about BSR.
From-SVN: r13601
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/sh/sh.md | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/gcc/config/sh/sh.md b/gcc/config/sh/sh.md index c9ce22a..0ff08aa 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 |