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h8300.md (*zero_extendqihi2_h8300): Make the second alternative "#".

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* config/h8300/h8300.md (*zero_extendqihi2_h8300): Make the
	second alternative "#".
	(*zero_extendqihi2_h8300hs): Likewise.
	(a define_split): New.

From-SVN: r60388
This commit is contained in:
Kazu Hirata 2002-12-21 17:47:32 +00:00 • committed by Kazu Hirata
parent 3cee1a78e2
commit f7e42925f6
2 changed files with 26 additions and 4 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2002-12-21 Kazu Hirata <kazu@cs.umass.edu>
* config/h8300/h8300.md (*zero_extendqihi2_h8300): Make the
second alternative "#".
(*zero_extendqihi2_h8300hs): Likewise.
(a define_split): New.
2002-12-21 Kazu Hirata <kazu@cs.umass.edu>
* config/h8300/h8300-protos.h: Update the prototype for

23
gcc/config/h8300/h8300.md
View file

@ -1802,26 +1802,41 @@
""
"")
(define_insn ""
(define_insn "*zero_extendqihi2_h8300"
[(set (match_operand:HI 0 "register_operand" "=r,r")
(zero_extend:HI (match_operand:QI 1 "general_operand_src" "0,g>")))]
"TARGET_H8300"
"@
mov.b #0,%t0
mov.b %R1,%s0\;mov.b #0,%t0"
#"
[(set_attr "length" "2,10")
(set_attr "cc" "clobber,clobber")])
(define_insn ""
(define_insn "*zero_extendqihi2_h8300hs"
[(set (match_operand:HI 0 "register_operand" "=r,r")
(zero_extend:HI (match_operand:QI 1 "general_operand_src" "0,g>")))]
"TARGET_H8300H || TARGET_H8300S"
"@
extu.w %T0
mov.b %R1,%s0\;extu.w %T0"
#"
[(set_attr "length" "2,10")
(set_attr "cc" "set_znv,set_znv")])
;; Split the zero extension of a general operand (actually a memory
;; operand) into a load of the operand and the actual zero extension
;; so that 1) the length will be accurate, and 2) the zero extensions
;; appearing at the end of basic blocks may be merged.
(define_split
[(set (match_operand:HI 0 "register_operand" "")
(zero_extend:HI (match_operand:QI 1 "general_operand_src" "")))]
"reload_completed"
[(set (match_dup 2)
(match_dup 1))
(set (match_dup 0)
(zero_extend:HI (match_dup 2)))]
"operands[2] = gen_rtx_REG (QImode, REGNO (operands[0]));")
;; The compiler can synthesize a H8/300H variant of this which is
;; just as efficient as one that we'd create
(define_insn "zero_extendqisi2"