(adddi3, subdi3): New patterns.

From-SVN: r8684

gcc/config/m68k/m68k.md

@@ -1854,6 +1854,18 @@
 
 ;; add instructions
 
+(define_insn "adddi3"
+  [(set (match_operand:DI 0 "register_operand" "=d")
+	(plus:DI (match_operand:DI 1 "register_operand" "%0")
+		 (match_operand:DI 2 "register_operand" "d")))]
+  ""
+  "*
+{
+  operands[1] = gen_rtx (REG, SImode, REGNO (operands[0]) + 1);
+  operands[3] = gen_rtx (REG, SImode, REGNO (operands[2]) + 1);
+  return \"add%.l %3,%1\;addx%.l %2,%0\";
+} ")
+
 ;; Note that the middle two alternatives are near-duplicates
 ;; in order to handle insns generated by reload.
 ;; This is needed since they are not themselves reloaded,
@@ -2274,6 +2286,18 @@
 
 ;; subtract instructions
 
+(define_insn "subdi3"
+  [(set (match_operand:DI 0 "register_operand" "=d")
+	(minus:DI (match_operand:DI 1 "register_operand" "0")
+		 (match_operand:DI 2 "register_operand" "d")))]
+  ""
+  "*
+{
+  operands[1] = gen_rtx (REG, SImode, REGNO (operands[0]) + 1);
+  operands[3] = gen_rtx (REG, SImode, REGNO (operands[2]) + 1);
+  return \"sub%.l %3,%1\;subx%.l %2,%0\";
+} ")
+
 (define_insn "subsi3"
   [(set (match_operand:SI 0 "general_operand" "=m,r")
 	(minus:SI (match_operand:SI 1 "general_operand" "0,0")