(swapsi): Add `+' operand constraints.

(insert to memory recognizer): Add `+'.
(peephole for moving returned value to fp reg): Add `='.

From-SVN: r1459

gcc/config/m68k/m68k.md

@@ -656,8 +656,8 @@
 
 ;This is never used.
 ;(define_insn "swapsi"
-;  [(set (match_operand:SI 0 "general_operand" "r")
-;	(match_operand:SI 1 "general_operand" "r"))
+;  [(set (match_operand:SI 0 "general_operand" "+r")
+;	(match_operand:SI 1 "general_operand" "+r"))
 ;   (set (match_dup 1) (match_dup 0))]
 ;  ""
 ;  "exg %1,%0")
@@ -3624,7 +3624,7 @@
 ; than an odd byte aligned bit field instruction.
 ;
 (define_insn ""
-  [(set (zero_extract:SI (match_operand:QI 0 "nonimmediate_operand" "o")
+  [(set (zero_extract:SI (match_operand:QI 0 "nonimmediate_operand" "+o")
 			 (match_operand:SI 1 "immediate_operand" "i")
 			 (match_operand:SI 2 "immediate_operand" "i"))
 	(match_operand:SI 3 "general_operand" "rmi"))]
@@ -4770,7 +4770,7 @@
 
 (define_peephole
   [(set (reg:SI 15) (plus:SI (reg:SI 15) (const_int 4)))
-   (set (match_operand:DF 0 "register_operand" "f")
+   (set (match_operand:DF 0 "register_operand" "=f")
 	(match_operand:DF 1 "register_operand" "ad"))]
   "FP_REG_P (operands[0]) && ! FP_REG_P (operands[1])"
   "*