diff options
| author | hiller <hiller@138bc75d-0d04-0410-961f-82ee72b054a4> | 2001-03-29 02:32:46 +0000 |
|---|---|---|
| committer | hiller <hiller@138bc75d-0d04-0410-961f-82ee72b054a4> | 2001-03-29 02:32:46 +0000 |
| commit | 26f0753fad09f8b29e47e60a19508a304b5d3154 (patch) | |
| tree | 62b821db395e83b74400dea719d7f47b4f80b576 /gcc/config/mn10300 | |
| parent | 9461b3505a0e61471edec0ff577f3be5c1fba395 (diff) | |
| download | gcc-26f0753fad09f8b29e47e60a19508a304b5d3154.tar.gz | |
2001-03-28 Matthew Hiller <hiller@redhat.com>
* config/mn10300/mn10300.md (cmpsi): Fix first alternative's
output template.
* MAINTAINERS: Added self.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@40956 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/config/mn10300')
| -rw-r--r-- | gcc/config/mn10300/mn10300.md | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/gcc/config/mn10300/mn10300.md b/gcc/config/mn10300/mn10300.md index 564a4c95d34..bf913b23b72 100644 --- a/gcc/config/mn10300/mn10300.md +++ b/gcc/config/mn10300/mn10300.md @@ -709,15 +709,23 @@ "* return output_tst (operands[0], insn);" [(set_attr "cc" "set_znv")]) +;; Ordinarily, the cmp instruction will set the Z bit of cc0 to 1 if +;; its operands hold equal values, but the operands of a cmp +;; instruction must be distinct registers. In the case where we'd +;; like to compare a register to itself, we can achieve this effect +;; with a btst 0,d0 instead. (This will not alter the contents of d0 +;; but will have the proper effect on cc0. Using d0 is arbitrary; any +;; data register would work.) + (define_insn "cmpsi" [(set (cc0) - (compare (match_operand:SI 0 "register_operand" "!*d*a*x,dax") - (match_operand:SI 1 "nonmemory_operand" "!*0,daxi")))] + (compare (match_operand:SI 0 "register_operand" "*d*a*x,dax") + (match_operand:SI 1 "nonmemory_operand" "*0,daxi")))] "" "@ - add 0,%0 + btst 0,d0 cmp %1,%0" - [(set_attr "cc" "invert,compare")]) + [(set_attr "cc" "compare,compare")]) ;; ---------------------------------------------------------------------- ;; ADD INSTRUCTIONS |