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diff --git a/gcc-4.9/gcc/config/stormy16/constraints.md b/gcc-4.9/gcc/config/stormy16/constraints.md
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+;; Constraint definitions for XSTORMY16.
+;; Copyright (C) 2011-2014 Free Software Foundation, Inc.
+;;
+;; 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/>.
+
+;; Register constraints.
+(define_register_constraint "a" "R0_REGS"
+  "@internal")
+
+(define_register_constraint "b" "R1_REGS"
+  "@internal")
+
+(define_register_constraint "c" "R2_REGS"
+  "@internal")
+
+(define_register_constraint "d" "R8_REGS"
+  "@internal")
+
+(define_register_constraint "e" "EIGHT_REGS"
+  "@internal")
+
+(define_register_constraint "t" "TWO_REGS"
+  "@internal")
+
+(define_register_constraint "z" "ICALL_REGS"
+  "@internal")
+
+;; Integer constraints.
+(define_constraint "I"
+  "An integer between 0 and 3."
+  (and (match_code "const_int")
+       (match_test "IN_RANGE (ival, 0, 3)")))
+
+(define_constraint "J"
+  "A power of two."
+  (and (match_code "const_int")
+       (match_test "exact_log2 (ival) != -1")))
+
+(define_constraint "K"
+  "A power of two when inverted."
+  (and (match_code "const_int")
+       (match_test "exact_log2 (~ival) != -1")))
+
+(define_constraint "L"
+  "An 8-bit unsigned integer."
+  (and (match_code "const_int")
+       (match_test "IN_RANGE (ival, 0, 255)")))
+
+(define_constraint "M"
+  "An integer between -255 and 0."
+  (and (match_code "const_int")
+       (match_test "IN_RANGE (ival, -255, 0)")))
+
+(define_constraint "N"
+  "An integer between -3 and 0."
+  (and (match_code "const_int")
+       (match_test "IN_RANGE (ival, -3, 0)")))
+
+(define_constraint "O"
+  "An integer between 1 and 4."
+  (and (match_code "const_int")
+       (match_test "IN_RANGE (ival, 1, 4)")))
+
+(define_constraint "P"
+  "An integer between -4 and -1."
+  (and (match_code "const_int")
+       (match_test "IN_RANGE (ival, -4, -1)")))
+
+;; Extra constraints.
+(define_constraint "Q"
+  "A register push operation."
+  (and (match_code "mem")
+       (match_code "post_inc" "0")
+       (match_test "XEXP (XEXP (op, 0), 0) == stack_pointer_rtx")))
+
+(define_constraint "R"
+  "A register pop operation."
+  (and (match_code "mem")
+       (match_code "pre_dec" "0")
+       (match_test "XEXP (XEXP (op, 0), 0) == stack_pointer_rtx")))
+
+(define_constraint "S"
+  "An immediate memory address."
+  (and (match_code "mem")
+       (match_code "const_int" "0")
+       (match_test "xstormy16_legitimate_address_p (VOIDmode, XEXP (op, 0), false)")))
+
+(define_constraint "T"
+  "@internal"
+  ;; For Rx; not implemented yet.
+  (match_test "0"))
+
+(define_constraint "U"
+  "An integer not between 2 and 15."
+  (and (match_code "const_int")
+       (match_test "!IN_RANGE (ival, 2, 15)")))
+
+(define_constraint "W"
+  "@internal"
+  (match_operand 0 "xstormy16_below100_operand"))
+
+(define_constraint "Z"
+  "Zero."
+  (and (match_code "const_int")
+       (match_test "ival == 0")))
+\ No newline at end of file