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Add three special-cases of CMP insns against zero.

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From-SVN: r3573
This commit is contained in:
Richard Kenner 1993-03-01 07:29:39 -05:00
parent 26915fa9bc
commit 5e2a751adc
1 changed files with 27 additions and 0 deletions
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27
gcc/config/alpha/alpha.md
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@ -1128,6 +1128,33 @@
"cmp%C1 %r2,%3,%0"
[(set_attr "type" "icmp")])
;; There are three important special-case that don't fit the above pattern
;; but which we want to handle here.
(define_insn ""
[(set (match_operand:DI 0 "register_operand" "=r")
(ne:DI (match_operand:DI 1 "register_operand" "r")
(const_int 0)))]
""
"cmpult $31,%1,%0"
[(set_attr "type" "icmp")])
(define_insn ""
[(set (match_operand:DI 0 "register_operand" "=r")
(gt:DI (match_operand:DI 1 "register_operand" "r")
(const_int 0)))]
""
"cmplt $31,%1,%0"
[(set_attr "type" "icmp")])
(define_insn ""
[(set (match_operand:DI 0 "register_operand" "=r")
(ge:DI (match_operand:DI 1 "register_operand" "r")
(const_int 0)))]
""
"cmple $31,%1,%0"
[(set_attr "type" "icmp")])
(define_insn ""
[(set (match_operand:DI 0 "register_operand" "=r,r")
(if_then_else:DI