rs6000.c (mask_constant): Delete.

	* rs6000.c (mask_constant): Delete.
	(mask_operand): Move mask_constant() body to here.
	* rs6000.h (mask_constant): Delete declaration.
	* rs6000.md (nabsdi2): Reverse subtraction in splitter.

From-SVN: r26925

gcc/ChangeLog

+Thu May 13 15:34:18 1999  David Edelsohn  <edelsohn@gnu.org>
+
+	* rs6000.c (mask_constant): Delete.
+	(mask_operand): Move mask_constant() body to here.
+	* rs6000.h (mask_constant): Delete declaration.
+	* rs6000.md (nabsdi2): Reverse subtraction in splitter.
+
 Thu May 13 02:25:01 1999  Jeffrey A Law  (law@cygnus.com)
 
 	* cpp.texi: Fix some typos.

gcc/config/rs6000/rs6000.c

@@ -922,19 +922,26 @@ non_logical_cint_operand (op, mode)
 	  && (INTVAL (op) & (~ (HOST_WIDE_INT) 0xffff0000)) != 0);
 }
 
-/* Return 1 if C is a constant that can be encoded in a mask on the
+/* Return 1 if C is a constant that can be encoded in a 32-bit mask on the
    RS/6000.  It is if there are no more than two 1->0 or 0->1 transitions.
    Reject all ones and all zeros, since these should have been optimized
    away and confuse the making of MB and ME.  */
 
 int
-mask_constant (c)
-     register HOST_WIDE_INT c;
+mask_operand (op, mode)
+     register rtx op;
+     enum machine_mode mode ATTRIBUTE_UNUSED;
 {
+  HOST_WIDE_INT c;
   int i;
   int last_bit_value;
   int transitions = 0;
 
+  if (GET_CODE (op) != CONST_INT)
+    return 0;
+
+  c = INTVAL (op);
+
   if (c == 0 || c == ~0)
     return 0;
 
@@ -947,16 +954,6 @@ mask_constant (c)
   return transitions <= 2;
 }
 
-/* Return 1 if the operand is a constant that is a mask on the RS/6000. */
-
-int
-mask_operand (op, mode)
-     register rtx op;
-     enum machine_mode mode ATTRIBUTE_UNUSED;
-{
-  return GET_CODE (op) == CONST_INT && mask_constant (INTVAL (op));
-}
-
 /* Return 1 if the operand is a constant that is a PowerPC64 mask.
    It is if there are no more than one 1->0 or 0->1 transitions.
    Reject all ones and all zeros, since these should have been optimized

gcc/config/rs6000/rs6000.h

@@ -3257,7 +3257,6 @@ extern int add_operand ();
 extern int non_add_cint_operand ();
 extern int non_logical_cint_operand ();
 extern int logical_operand ();
-extern int mask_constant ();
 extern int mask_operand ();
 extern int mask64_operand ();
 extern int and64_operand ();

gcc/config/rs6000/rs6000.md

@@ -4963,7 +4963,7 @@
    (set (match_dup 0) (minus:DI (match_dup 0) (match_dup 2)))]
   "")
 
-(define_insn ""
+(define_insn "*nabsdi2"
   [(set (match_operand:DI 0 "gpc_reg_operand" "=&r,r")
 	(neg:DI (abs:DI (match_operand:DI 1 "gpc_reg_operand" "r,0"))))
    (clobber (match_scratch:DI 2 "=&r,&r"))]
@@ -4978,7 +4978,7 @@
   "TARGET_POWERPC64 && reload_completed"
   [(set (match_dup 2) (ashiftrt:DI (match_dup 1) (const_int 63)))
    (set (match_dup 0) (xor:DI (match_dup 2) (match_dup 1)))
-   (set (match_dup 0) (minus:DI (match_dup 0) (match_dup 2)))]
+   (set (match_dup 0) (minus:DI (match_dup 2) (match_dup 0)))]
   "")
 
 (define_expand "negdi2"