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+;; GCC machine description for picochip
+;; Copyright (C) 2008 Free Software Foundation, Inc.
+;; Contributed by Picochip Ltd (http://www.picochip.com)
+;; Maintained by Daniel Towner (dant@picochip.com) and Hariharan
+;; Sandanagobalane (hariharan@picochip.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/>.
+
+(define_predicate "picochip_register_or_immediate_operand"
+  (ior (match_operand 0 "register_operand")
+       (match_operand 0 "immediate_operand")))
+
+(define_predicate "power_of_2_imm_operand"
+  (match_code "const_int")
+{
+  if (GET_CODE (op) == CONST_INT)
+    {
+      if (exact_log2 (INTVAL (op)) <= 16 && exact_log2 (INTVAL (op)) > 0)
+        return 1;
+    }
+
+  return 0;
+})
+
+;; Limit the comparison operators to a selected subset.
+(define_predicate "picochip_supported_comparison_operator"
+  (and (match_operand 0 "comparison_operator")
+       (match_code "ne,eq,ge,geu,lt,ltu")))
+(define_predicate "picochip_peephole_comparison_operator"
+  (and (match_operand 0 "comparison_operator")
+       (match_code "ne,eq")))
+
+;; Allow selected arithmetic operators to apply a shift to their first
+;; operands
+
+(define_predicate "picochip_first_op_shift_operator"
+  (match_code "and,plus,minus,ior,xor"))
+
+;; The same as the previous predicate, but only allowing those
+;; operators which can accept an immediate.
+(define_predicate "picochip_first_op_shift_operator_imm"
+  (match_code "plus,minus"))
+
+;; Predicate on a J type integer.
+(define_predicate "picochip_J_operand"
+  (match_operand 0 "immediate_operand")
+  {
+    return (CONST_INT == GET_CODE(op) &&
+            picochip_const_ok_for_letter_p (INTVAL(op), 'J'));
+  })
+
+;; Is the operand suitable for use in a compare?
+
+(define_predicate "picochip_comparison_operand"
+  (ior (match_operand 0 "register_operand")
+       (and (match_operand 0 "immediate_operand")
+            (match_test "picochip_const_ok_for_letter_p(INTVAL(op), 'O')"))))
+