(addsi3...

(addsi3, addhi3): Use two addqw (or subqw) insns when adding (or
subtracting) small integer constants (8 < N <= 16) to both address and
data registers.

From-SVN: r13367

gcc/config/m68k/m68k.md

 ;;- Machine description for GNU compiler, Motorola 68000 Version
-;;  Copyright (C) 1987, 88, 93, 94, 95, 1996 Free Software Foundation, Inc.
+;;  Copyright (C) 1987, 88, 93, 94, 95, 96, 1997 Free Software Foundation, Inc.
 
 ;; This file is part of GNU CC.
 
@@ -2167,9 +2167,9 @@
 		  : \"subq%.l %2,%0\");
 	}
       /* On the CPU32 it is faster to use two addqw instructions to
-	 add a small integer (8 < N <= 16) to an address register.
+	 add a small integer (8 < N <= 16) to a register.
 	 Likewise for subqw. */
-      if (TARGET_CPU32 && ADDRESS_REG_P (operands[0]))
+      if (TARGET_CPU32 && REG_P (operands[0]))
 	{
 	  if (INTVAL (operands[2]) > 8
 	      && INTVAL (operands[2]) <= 16)
@@ -2242,9 +2242,9 @@
 	  return \"subq%.w %2,%0\";
 	}
       /* On the CPU32 it is faster to use two addqw instructions to
-	 add a small integer (8 < N <= 16) to an address register.  
+	 add a small integer (8 < N <= 16) to a register.  
 	 Likewise for subqw. */
-      if (TARGET_CPU32 && ADDRESS_REG_P (operands[0]))
+      if (TARGET_CPU32 && REG_P (operands[0]))
 	{
 	  if (INTVAL (operands[2]) > 8
 	      && INTVAL (operands[2]) <= 16)
@@ -2308,9 +2308,9 @@
 	  return \"subq%.w %1,%0\";
 	}
       /* On the CPU32 it is faster to use two addqw instructions to
-	 add a small integer (8 < N <= 16) to an address register. 
+	 add a small integer (8 < N <= 16) to a register. 
 	 Likewise for subqw. */
-      if (TARGET_CPU32 && ADDRESS_REG_P (operands[0]))
+      if (TARGET_CPU32 && REG_P (operands[0]))
 	{
 	  if (INTVAL (operands[1]) > 8
 	      && INTVAL (operands[1]) <= 16)
@@ -2368,9 +2368,9 @@
 	  return \"subq%.w %1,%0\";
 	}
       /* On the CPU32 it is faster to use two addqw instructions to
-	 add a small integer (8 < N <= 16) to an address register.
+	 add a small integer (8 < N <= 16) to a register.
 	 Likewise for subqw. */
-      if (TARGET_CPU32 && ADDRESS_REG_P (operands[0])) 
+      if (TARGET_CPU32 && REG_P (operands[0])) 
 	{
 	  if (INTVAL (operands[1]) > 8
 	      && INTVAL (operands[1]) <= 16)