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| author | Jim Wilson <wilson@gcc.gnu.org> | 1994-06-28 10:41:52 -0700 |
|---|---|---|
| committer | Jim Wilson <wilson@gcc.gnu.org> | 1994-06-28 10:41:52 -0700 |
| commit | 3c9b21309942ec8b66c000356452f4d0f2e7a610 (patch) | |
| tree | 3182a8cb20f637e1ba8c63f7b4be137d5412d941 /gcc/config/i960/i960.md | |
| parent | 3bbbf89c84217eb443e20347c635a73c58ce99fc (diff) | |
| download | gcc-3c9b21309942ec8b66c000356452f4d0f2e7a610.zip gcc-3c9b21309942ec8b66c000356452f4d0f2e7a610.tar.gz gcc-3c9b21309942ec8b66c000356452f4d0f2e7a610.tar.bz2 | |
(andsi3+6): Replace bad clrbit pattern with two working ones.
From-SVN: r7585
Diffstat (limited to 'gcc/config/i960/i960.md')
| -rw-r--r-- | gcc/config/i960/i960.md | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/gcc/config/i960/i960.md b/gcc/config/i960/i960.md index dd52829..5a93cfe 100644 --- a/gcc/config/i960/i960.md +++ b/gcc/config/i960/i960.md @@ -1657,14 +1657,25 @@ return \"clrbit %2,%1,%0\"; }") +;; (not (ashift 1 reg)) canonicalizes to (rotate -2 reg) (define_insn "" [(set (match_operand:SI 0 "register_operand" "=d") - (and:SI (ashift:SI (const_int 1) + (and:SI (rotate:SI (const_int -2) (match_operand:SI 1 "register_operand" "d")) - (match_operand:SI 2 "arith_operand" "dI")))] + (match_operand:SI 2 "register_operand" "d")))] "" "clrbit %1,%2,%0") +;; The above pattern canonicalizes to this when both the input and output +;; are the same pseudo-register. +(define_insn "" + [(set (zero_extract:SI (match_operand:SI 0 "register_operand" "=d") + (const_int 1) + (match_operand:SI 1 "register_operand" "d")) + (const_int 0))] + "" + "clrbit %1,%0,%0") + (define_insn "" [(set (match_operand:SI 0 "register_operand" "=d") (xor:SI (match_operand:SI 1 "arith_operand" "dI") |