rs6000.c (num_insns_constant): Compute number of instructions more accurately.

        * rs6000.c (num_insns_constant): Compute number of instructions
        more accurately.

From-SVN: r45484

gcc/ChangeLog

+2001-09-07  David Edelsohn  <edelsohn@gnu.org>
+
+	* rs6000.c (num_insns_constant): Compute number of instructions
+	more accurately.
+
 2001-09-07  Jim Wilson  <wilson@redhat.com>
 
 	* alias.c (clear_reg_alias_info): New.

gcc/config/rs6000/rs6000.c

@@ -880,7 +880,8 @@ num_insns_constant (op, mode)
   if (GET_CODE (op) == CONST_INT)
     {
 #if HOST_BITS_PER_WIDE_INT == 64
-      if (mask64_operand (op, mode))
+      if ((INTVAL (op) >> 31) != 0 && (INTVAL (op) >> 31) != -1
+	  && mask64_operand (op, mode))
 	    return 2;
       else
 #endif