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+;; Machine description for AArch64 architecture.
+;; Copyright (C) 2009-2014 Free Software Foundation, Inc.
+;; Contributed by ARM Ltd.
+;;
+;; 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_register_constraint "k" "STACK_REG"
+  "@internal The stack register.")
+
+(define_register_constraint "w" "FP_REGS"
+  "Floating point and SIMD vector registers.")
+
+(define_register_constraint "x" "FP_LO_REGS"
+  "Floating point and SIMD vector registers V0 - V15.")
+
+(define_constraint "I"
+ "A constant that can be used with an ADD operation."
+ (and (match_code "const_int")
+      (match_test "aarch64_uimm12_shift (ival)")))
+
+(define_constraint "J"
+ "A constant that can be used with a SUB operation (once negated)."
+ (and (match_code "const_int")
+      (match_test "aarch64_uimm12_shift (-ival)")))
+
+;; We can't use the mode of a CONST_INT to determine the context in
+;; which it is being used, so we must have a separate constraint for
+;; each context.
+
+(define_constraint "K"
+ "A constant that can be used with a 32-bit logical operation."
+ (and (match_code "const_int")
+      (match_test "aarch64_bitmask_imm (ival, SImode)")))
+
+(define_constraint "L"
+ "A constant that can be used with a 64-bit logical operation."
+ (and (match_code "const_int")
+      (match_test "aarch64_bitmask_imm (ival, DImode)")))
+
+(define_constraint "M"
+ "A constant that can be used with a 32-bit MOV immediate operation."
+ (and (match_code "const_int")
+      (match_test "aarch64_move_imm (ival, SImode)")))
+
+(define_constraint "N"
+ "A constant that can be used with a 64-bit MOV immediate operation."
+ (and (match_code "const_int")
+      (match_test "aarch64_move_imm (ival, DImode)")))
+
+(define_constraint "S"
+  "A constraint that matches an absolute symbolic address."
+  (and (match_code "const,symbol_ref,label_ref")
+       (match_test "aarch64_symbolic_address_p (op)")))
+
+(define_constraint "Y"
+  "Floating point constant zero."
+  (and (match_code "const_double")
+       (match_test "aarch64_float_const_zero_rtx_p (op)")))
+
+(define_constraint "Z"
+  "Integer constant zero."
+  (match_test "op == const0_rtx"))
+
+(define_constraint "Ush"
+  "A constraint that matches an absolute symbolic address high part."
+  (and (match_code "high")
+       (match_test "aarch64_valid_symref (XEXP (op, 0), GET_MODE (XEXP (op, 0)))")))
+
+(define_constraint "Uss"
+  "@internal
+  A constraint that matches an immediate shift constant in SImode."
+  (and (match_code "const_int")
+       (match_test "(unsigned HOST_WIDE_INT) ival < 32")))
+
+(define_constraint "Usd"
+  "@internal
+  A constraint that matches an immediate shift constant in DImode."
+  (and (match_code "const_int")
+       (match_test "(unsigned HOST_WIDE_INT) ival < 64")))
+
+(define_constraint "UsM"
+  "@internal
+  A constraint that matches the immediate constant -1."
+  (match_test "op == constm1_rtx"))
+
+(define_constraint "Ui1"
+  "@internal
+  A constraint that matches the immediate constant +1."
+  (match_test "op == const1_rtx"))
+
+(define_constraint "Ui3"
+  "@internal
+  A constraint that matches the integers 0...4."
+  (and (match_code "const_int")
+       (match_test "(unsigned HOST_WIDE_INT) ival <= 4")))
+
+(define_constraint "Up3"
+  "@internal
+  A constraint that matches the integers 2^(0...4)."
+  (and (match_code "const_int")
+       (match_test "(unsigned) exact_log2 (ival) <= 4")))
+
+(define_memory_constraint "Q"
+ "A memory address which uses a single base register with no offset."
+ (and (match_code "mem")
+      (match_test "REG_P (XEXP (op, 0))")))
+
+(define_memory_constraint "Ump"
+  "@internal
+  A memory address suitable for a load/store pair operation."
+  (and (match_code "mem")
+       (match_test "aarch64_legitimate_address_p (GET_MODE (op), XEXP (op, 0),
+						  PARALLEL, 1)")))
+
+(define_memory_constraint "Utv"
+  "@internal
+   An address valid for loading/storing opaque structure
+   types wider than TImode."
+  (and (match_code "mem")
+       (match_test "aarch64_simd_mem_operand_p (op)")))
+
+(define_constraint "Ufc"
+  "A floating point constant which can be used with an\
+   FMOV immediate operation."
+  (and (match_code "const_double")
+       (match_test "aarch64_float_const_representable_p (op)")))
+
+(define_constraint "Dn"
+  "@internal
+ A constraint that matches vector of immediates."
+ (and (match_code "const_vector")
+      (match_test "aarch64_simd_valid_immediate (op, GET_MODE (op),
+						 false, NULL)")))
+
+(define_constraint "Dh"
+  "@internal
+ A constraint that matches an immediate operand valid for\
+ AdvSIMD scalar move in HImode."
+ (and (match_code "const_int")
+      (match_test "aarch64_simd_scalar_immediate_valid_for_move (op,
+						 HImode)")))
+
+(define_constraint "Dq"
+  "@internal
+ A constraint that matches an immediate operand valid for\
+ AdvSIMD scalar move in QImode."
+ (and (match_code "const_int")
+      (match_test "aarch64_simd_scalar_immediate_valid_for_move (op,
+						 QImode)")))
+
+(define_constraint "Dl"
+  "@internal
+ A constraint that matches vector of immediates for left shifts."
+ (and (match_code "const_vector")
+      (match_test "aarch64_simd_shift_imm_p (op, GET_MODE (op),
+						 true)")))
+
+(define_constraint "Dr"
+  "@internal
+ A constraint that matches vector of immediates for right shifts."
+ (and (match_code "const_vector")
+      (match_test "aarch64_simd_shift_imm_p (op, GET_MODE (op),
+						 false)")))
+(define_constraint "Dz"
+  "@internal
+ A constraint that matches vector of immediate zero."
+ (and (match_code "const_vector")
+      (match_test "aarch64_simd_imm_zero_p (op, GET_MODE (op))")))
+
+(define_constraint "Dd"
+  "@internal
+ A constraint that matches an immediate operand valid for AdvSIMD scalar."
+ (and (match_code "const_int")
+      (match_test "aarch64_simd_imm_scalar_p (op, GET_MODE (op))")))