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+;; Constraint definitions for S+CORE
+;; Copyright (C) 2005-2014 Free Software Foundation, Inc.
+;; Contributed by Sunnorth.
+
+;; 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/>.  */
+
+;; -------------------------------------------------------------------------
+;; Constraints
+;; -------------------------------------------------------------------------
+
+;; Register constraints.
+(define_register_constraint "d" "G32_REGS"
+  "r0 to r31")
+
+(define_register_constraint "e" "G16_REGS"
+  "r0 to r15")
+
+(define_register_constraint "t" "T32_REGS"
+  "r8 to r11 | r22 to r27")
+
+(define_register_constraint "h" "HI_REG"
+  "hi")
+
+(define_register_constraint "l" "LO_REG"
+  "lo")
+
+(define_register_constraint "x" "CE_REGS"
+  "hi + lo")
+
+(define_register_constraint "q" "CN_REG"
+  "cnt")
+
+(define_register_constraint "y" "LC_REG"
+  "lcb")
+
+(define_register_constraint "z" "SC_REG"
+  "scb")
+
+(define_register_constraint "a" "SP_REGS"
+  "cnt + lcb + scb")
+
+(define_register_constraint "c" "CR_REGS"
+  "cr0 to cr15")
+
+;; Integer constant constraints.
+(define_constraint "I"
+  "High 16-bit constant (32-bit constant with 16 LSBs zero)."
+  (and (match_code "const_int")
+       (match_test "(ival & 0xffff) == 0")))
+
+(define_constraint "J"
+  "Unsigned 5 bit integer (in the range 0 to 31)."
+  (and (match_code "const_int")
+       (match_test "ival >= 0 && ival <= 31")))
+
+(define_constraint "K"
+  "Unsigned 16 bit integer (in the range 0 to 65535)."
+  (and (match_code "const_int")
+       (match_test "ival >= 0 && ival <= 65535")))
+
+(define_constraint "L"
+  "Signed 16 bit integer (in the range −32768 to 32767)."
+  (and (match_code "const_int")
+       (match_test "ival >= -32768 && ival <= 32767")))
+
+(define_constraint "M"
+  "Unsigned 14 bit integer (in the range 0 to 16383)."
+  (and (match_code "const_int")
+       (match_test "ival >= 0 && ival <= 16383")))
+
+(define_constraint "N"
+  "Signed 14 bit integer (in the range −8192 to 8191)."
+  (and (match_code "const_int")
+       (match_test "ival >= -8192 && ival <= 8191")))
+
+(define_constraint "Z"
+  "Any SYMBOL_REF."
+  (and (match_code "symbol_ref")
+       (match_test "GET_CODE (op) == SYMBOL_REF")))