OpenE2K/gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

* vax.md (sltu, sgeu): Delete sltu and sgeu insn patterns.

Browse Source 
From-SVN: r36044
This commit is contained in:
J. David Anglin 2000-08-29 19:10:05 +00:00 committed by Jeff Law
parent 2c8f0515bb
commit 76f941a847
2 changed files with 10 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
gcc/ChangeLog
View File

@ -1,3 +1,7 @@
2000-08-29 J. David Anglin <dave@hiauly1.hia.nrc.ca>
* vax.md (sltu, sgeu): Delete sltu and sgeu insn patterns.
2000-08-29 Zack Weinberg <zack@wolery.cumb.org>
* cpperror.c (print_file_and_line): If line is (unsigned int)-1,

30
gcc/config/vax/vax.md
View File

@ -122,31 +122,13 @@
""
"bitb %0,%1")
;; The vax has no sltu or sgeu patterns, but does have two-operand
;; add/subtract with carry. This is still better than the alternative.
;; Since the cc0-using insn cannot be separated from the cc0-setting insn,
;; and the two are created independently, we can't just use a define_expand
;; to try to optimize this. (The "movl" and "clrl" insns alter the cc0
;; flags, but leave the carry flag alone, but that can't easily be expressed.)
;;
;; Several two-operator combinations could be added to make slightly more
;; optimal code, but they'd have to cover all combinations of plus and minus
;; using match_dup. If you want to do this, I'd suggest changing the "sgeu"
;; pattern to something like (minus (const_int 1) (ltu ...)), so fewer
;; patterns need to be recognized.
;; -- Ken Raeburn (Raeburn@Watch.COM) 24 August 1991.
;; The vax has no sCOND insns. It does have add/subtract with carry
;; which could be used to implement the sltu and sgeu patterns. However,
;; to do this properly requires a complete rewrite of the compare insns
;; to keep them together with the sltu/sgeu insns until after the
;; reload pass is complete. The previous implementation didn't do this
;; and has been deleted.
(define_insn "sltu"
[(set (match_operand:SI 0 "general_operand" "=ro")
(ltu (cc0) (const_int 0)))]
""
"clrl %0\;adwc $0,%0")
(define_insn "sgeu"
[(set (match_operand:SI 0 "general_operand" "=ro")
(geu (cc0) (const_int 0)))]
""
"movl $1,%0\;sbwc $0,%0")
(define_insn "movdf"
[(set (match_operand:DF 0 "general_operand" "=g,g")