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avr.md (*umaddqihi4.2): New insn-and-split. 

* config/avr/avr.md (*umaddqihi4.2): New insn-and-split.

From-SVN: r184919
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Georg-Johann Lay 2012-03-05 10:28:45 +00:00 committed by Georg-Johann Lay
parent 1f338c3122
commit d84f3a058b
2 changed files with 27 additions and 0 deletions
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4
gcc/ChangeLog
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@ -1,3 +1,7 @@
2012-03-05 Georg-Johann Lay <avr@gjlay.de>
* config/avr/avr.md (*umaddqihi4.2): New insn-and-split.
2012-03-04 H.J. Lu <hongjiu.lu@intel.com>
* config/i386/i386.c (pro_epilogue_adjust_stack): Check Pmode

23
gcc/config/avr/avr.md
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@ -1692,6 +1692,29 @@
;; Handle small constants
;; Special case of a += 2*b as frequently seen with accesses to int arrays.
;; This is shorter, faster than MUL and has lower register pressure.
(define_insn_and_split "*umaddqihi4.2"
[(set (match_operand:HI 0 "register_operand" "=r")
(plus:HI (mult:HI (zero_extend:HI (match_operand:QI 1 "register_operand" "r"))
(const_int 2))
(match_operand:HI 2 "register_operand" "r")))]
"!reload_completed
&& !reg_overlap_mentioned_p (operands[0], operands[1])"
{ gcc_unreachable(); }
"&& 1"
[(set (match_dup 0)
(match_dup 2))
; *addhi3_zero_extend
(set (match_dup 0)
(plus:HI (zero_extend:HI (match_dup 1))
(match_dup 0)))
; *addhi3_zero_extend
(set (match_dup 0)
(plus:HI (zero_extend:HI (match_dup 1))
(match_dup 0)))])
;; "umaddqihi4.uconst"
;; "maddqihi4.sconst"
(define_insn_and_split "*<extend_u>maddqihi4.<extend_su>const"