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| author | Georg-Johann Lay <avr@gjlay.de> | 2011-10-10 09:57:02 +0000 |
|---|---|---|
| committer | Georg-Johann Lay <gjl@gcc.gnu.org> | 2011-10-10 09:57:02 +0000 |
| commit | beddf669bb9117e6425aae6908e8d339aec37ffd (patch) | |
| tree | f8acd0af0cc2a488df61df97489565ee3f495ca1 | |
| parent | e12693c1edf12b1e92d17313b4a83038ba4f8aa5 (diff) | |
| download | gcc-beddf669bb9117e6425aae6908e8d339aec37ffd.zip gcc-beddf669bb9117e6425aae6908e8d339aec37ffd.tar.gz gcc-beddf669bb9117e6425aae6908e8d339aec37ffd.tar.bz2 | |
avr.md (*mulhi3_enh): Treat squaring smarter.
* config/avr/avr.md (*mulhi3_enh): Treat squaring smarter.
From-SVN: r179739
| -rw-r--r-- | gcc/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/config/avr/avr.md | 12 |
2 files changed, 9 insertions, 7 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 7e7d6b2..6dc2963 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,9 @@ 2011-10-10 Georg-Johann Lay <avr@gjlay.de> + * config/avr/avr.md (*mulhi3_enh): Treat squaring smarter. + +2011-10-10 Georg-Johann Lay <avr@gjlay.de> + PR target/50652 * config/avr/avr-mcus.def (AVR_MCU): Set .data_section_start of atmega164a to 0x100. diff --git a/gcc/config/avr/avr.md b/gcc/config/avr/avr.md index f1ac95d..e17f7f2 100644 --- a/gcc/config/avr/avr.md +++ b/gcc/config/avr/avr.md @@ -1560,13 +1560,11 @@ (mult:HI (match_operand:HI 1 "register_operand" "r") (match_operand:HI 2 "register_operand" "r")))] "AVR_HAVE_MUL" - "mul %A1,%A2 - movw %0,r0 - mul %A1,%B2 - add %B0,r0 - mul %B1,%A2 - add %B0,r0 - clr r1" + { + return REGNO (operands[1]) == REGNO (operands[2]) + ? "mul %A1,%A1\;movw %0,r0\;mul %A1,%B1\;add %B0,r0\;add %B0,r0\;clr r1" + : "mul %A1,%A2\;movw %0,r0\;mul %A1,%B2\;add %B0,r0\;mul %B1,%A2\;add %B0,r0\;clr r1"; + } [(set_attr "length" "7") (set_attr "cc" "clobber")]) |