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constraints.md (Cm2): New constraint for int -2.

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* config/avr/constraints.md (Cm2): New constraint for int -2.
	* config/avr/avr.md (addqi3): Use it. New alternatives for +/-2.
	(*negqihi2): New insn.

From-SVN: r181103
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Georg-Johann Lay 2011-11-07 18:07:56 +00:00 • committed by Georg-Johann Lay
parent 6d87092d19
commit 8b42d3defd
3 changed files with 27 additions and 6 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2011-11-07 Georg-Johann Lay <avr@gjlay.de>
* config/avr/constraints.md (Cm2): New constraint for int -2.
* config/avr/avr.md (addqi3): Use it. New alternatives for +/-2.
(*negqihi2): New insn.
2011-11-07 H.J. Lu <hongjiu.lu@intel.com>
* dwarf2cfi.c (dwarf2out_frame_debug_expr): Check

22
gcc/config/avr/avr.md
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@ -752,17 +752,19 @@
; add bytes
(define_insn "addqi3"
[(set (match_operand:QI 0 "register_operand" "=r,d,r,r")
(plus:QI (match_operand:QI 1 "register_operand" "%0,0,0,0")
(match_operand:QI 2 "nonmemory_operand" "r,i,P,N")))]
[(set (match_operand:QI 0 "register_operand" "=r,d,r,r,r,r")
(plus:QI (match_operand:QI 1 "register_operand" "%0,0,0,0,0,0")
(match_operand:QI 2 "nonmemory_operand" "r,i,P,N,K,Cm2")))]
""
"@
add %0,%2
subi %0,lo8(-(%2))
inc %0
dec %0"
[(set_attr "length" "1,1,1,1")
(set_attr "cc" "set_czn,set_czn,set_zn,set_zn")])
dec %0
inc %0\;inc %0
dec %0\;dec %0"
[(set_attr "length" "1,1,1,1,2,2")
(set_attr "cc" "set_czn,set_czn,set_zn,set_zn,set_zn,set_zn")])
(define_expand "addhi3"
@ -3386,6 +3388,14 @@
[(set_attr "length" "1")
(set_attr "cc" "set_zn")])
(define_insn "*negqihi2"
[(set (match_operand:HI 0 "register_operand" "=r")
(neg:HI (sign_extend:HI (match_operand:QI 1 "register_operand" "0"))))]
""
"clr %B0\;neg %A0\;brge .+2\;com %B0"
[(set_attr "length" "4")
(set_attr "cc" "set_n")])
(define_insn "neghi2"
[(set (match_operand:HI 0 "register_operand" "=!d,r,&r")
(neg:HI (match_operand:HI 1 "register_operand" "0,0,r")))]

5
gcc/config/avr/constraints.md
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@ -103,6 +103,11 @@
(and (match_code "mem")
(match_test "extra_constraint_Q (op)")))
(define_constraint "Cm2"
"Constant integer @minus{}2."
(and (match_code "const_int")
(match_test "ival == -2")))
(define_constraint "C03"
"Constant integer 3."
(and (match_code "const_int")