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(cmpdi): Rewrite to avoid bogus matching constraints. 

From-SVN: r9880
This commit is contained in:
Richard Kenner 1995-06-05 19:00:56 -04:00
parent 7f49c33119
commit a1efcf3c40
1 changed files with 22 additions and 12 deletions
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34
gcc/config/m68k/m68k.md
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@ -411,23 +411,33 @@
;; compare instructions.
(define_insn "cmpdi"
(define_expand "cmpdi"
[(parallel
[(set (cc0)
(compare (match_operand:DI 0 "nonimmediate_operand" "")
(match_operand:DI 1 "general_operand" "")))
(clobber (match_dup 2))])]
""
"
{
operands[2] = gen_reg_rtx (DImode);
}")
(define_insn ""
[(set (cc0)
;; (compare (match_operand:DI 0 "general_operand" "=&d*a")
;; (compare (match_operand:DI 0 "general_operand" "+&d*a")
;; (compare (match_operand:DI 0 "general_operand" "+d*a")
(compare (match_operand:DI 0 "general_operand" "d*a")
(match_operand:DI 1 "general_operand" "d")))
(clobber (match_scratch:DI 2 "=0"))]
(compare (match_operand:DI 1 "nonimmediate_operand" "0,d")
(match_operand:DI 2 "general_operand" "d,0")))
(clobber (match_operand:DI 0 "register_operand" "=d,d"))]
""
"*
{
operands[2] = gen_rtx (REG, SImode, REGNO (operands[0]) + 1);
operands[3] = gen_rtx (REG, SImode, REGNO (operands[1]) + 1);
if (DATA_REG_P (operands[0]))
return \"sub%.l %3,%2\;subx%.l %1,%0\";
if (rtx_equal_p (operands[0], operands[1]))
return \"sub%.l %R2,%R0\;subx%.l %2,%0\";
else
return \"exg %/d0,%2\;sub%.l %3,%/d0\;exg %/d0,%0\;subx%.l %1,%/d0\;exg %/d0,%2\";
{
return \"sub%.l %R1,%R0\;subx%.l %1,%0\";
cc_status.flags |= CC_REVERSED;
}
}")
;; This is the second "hook" for PIC code (in addition to movsi). See