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+;; Predicate definitions for Xilinx MicroBlaze
+;; Copyright 2009, 2010 Free Software Foundation, Inc.
+;;
+;; Contributed by Michael Eager <eager@eagercon.com>.
+;;
+;; This file is part of GCC.
+;;
+;; GCC is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 3, or (at your option)
+;; any later version.
+;;
+;; GCC is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with GCC; see the file COPYING3.  If not see
+;; <http://www.gnu.org/licenses/>.  
+
+
+;; Return whether OP can be used as an operands in arithmetic.
+(define_predicate "arith_operand"
+  (ior (match_code "const_int,const_double")
+       (match_operand 0 "register_operand")))
+
+(define_predicate "arith_operand32"
+  (ior (match_operand 0 "register_operand")
+       (and (match_code "const_int,const_double")
+	    (match_test "LARGE_INT (op)"))))
+
+(define_predicate "const_0_operand"
+  (and (match_code "const_int,const_double")
+       (match_test "op == CONST0_RTX (GET_MODE (op))")))
+
+;; Return whether OP is a register or the constant 0.
+(define_predicate "reg_or_0_operand"
+  (ior (match_operand 0 "const_0_operand")
+       (match_operand 0 "register_operand")))
+
+;;  Return if the operand is either the PC or a label_ref.  
+(define_special_predicate "pc_or_label_operand"
+  (ior (match_code "pc,label_ref")
+       (and (match_code "symbol_ref")
+            (match_test "!(strcmp ((XSTR (op, 0)), \"_stack_overflow_exit\"))"))))
+
+;; Test for valid call operand
+(define_predicate "call_insn_operand"
+  (match_test "CALL_INSN_OP (op)"))
+
+;; Return if OPERAND is valid as a source operand for a move instruction.
+(define_predicate "move_operand"
+  (and (
+     not (
+       and (match_code "plus")
+           (not (match_test "(GET_CODE (XEXP (op, 0)) == REG) ^ (GET_CODE (XEXP (op,1)) == REG)"))
+	 )
+       )
+       (match_operand 0 "general_operand")))
+
+;; Test for valid PIC call operand
+(define_predicate "call_insn_plt_operand"
+  (match_test "PLT_ADDR_P (op)"))