--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/config/gcn/constraints.md	Thu Feb 13 11:34:05 2020 +0900
@@ -0,0 +1,144 @@
+;; Constraint definitions for GCN.
+;; Copyright (C) 2016-2020 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/>.
+
+(define_constraint "I"
+  "Inline integer constant"
+  (and (match_code "const_int")
+       (match_test "ival >= -16 && ival <= 64")))
+
+(define_constraint "J"
+  "Signed integer 16-bit inline constant"
+  (and (match_code "const_int")
+       (match_test "((unsigned HOST_WIDE_INT) ival + 0x8000) < 0x10000")))
+
+(define_constraint "Kf"
+  "Immeditate constant -1"
+  (and (match_code "const_int")
+       (match_test "ival == -1")))
+
+(define_constraint "L"
+  "Unsigned integer 15-bit constant"
+  (and (match_code "const_int")
+       (match_test "((unsigned HOST_WIDE_INT) ival) < 0x8000")))
+
+(define_constraint "A"
+  "Inline immediate parameter"
+  (and (match_code "const_int,const_double,const_vector")
+       (match_test "gcn_inline_constant_p (op)")))
+
+(define_constraint "B"
+  "Immediate 32-bit parameter"
+  (and (match_code "const_int,const_double,const_vector")
+	(match_test "gcn_constant_p (op)")))
+
+(define_constraint "C"
+  "Immediate 32-bit parameter zero-extended to 64-bits"
+  (and (match_code "const_int,const_double,const_vector")
+	(match_test "gcn_constant64_p (op)")))
+
+(define_constraint "DA"
+  "Immediate 64-bit parameter, low and high part match 'A'"
+  (and (match_code "const_int,const_double,const_vector")
+       (match_test "gcn_inline_constant64_p (op, 0)")))
+
+(define_constraint "Db"
+  "Immediate 64-bit parameter, low part matches 'B', high part matches 'A'"
+  (and (match_code "const_int,const_double,const_vector")
+       (match_test "gcn_inline_constant64_p (op, 1)")))
+
+(define_constraint "DB"
+  "Immediate 64-bit parameter, low and high part match 'B'"
+  (match_code "const_int,const_double,const_vector"))
+
+(define_constraint "U"
+  "unspecified value"
+  (match_code "unspec"))
+
+(define_constraint "Y"
+  "Symbol or label for relative calls"
+  (match_code "symbol_ref,label_ref"))
+
+(define_register_constraint "v" "VGPR_REGS"
+  "VGPR registers")
+
+(define_register_constraint "Sg" "SGPR_REGS"
+  "SGPR registers")
+
+(define_register_constraint "SD" "SGPR_DST_REGS"
+  "registers useable as a destination of scalar operation")
+
+(define_register_constraint "SS" "SGPR_SRC_REGS"
+  "registers useable as a source of scalar operation")
+
+(define_register_constraint "Sm" "SGPR_MEM_SRC_REGS"
+  "registers useable as a source of scalar memory operation")
+
+(define_register_constraint "Sv" "SGPR_VOP_SRC_REGS"
+  "registers useable as a source of VOP3A instruction")
+
+(define_register_constraint "ca" "ALL_CONDITIONAL_REGS"
+  "SCC VCCZ or EXECZ")
+
+(define_register_constraint "cs" "SCC_CONDITIONAL_REG"
+  "SCC")
+
+(define_register_constraint "cV" "VCC_CONDITIONAL_REG"
+  "VCC")
+
+(define_register_constraint "e" "EXEC_MASK_REG"
+  "EXEC")
+
+(define_special_memory_constraint "RB"
+  "Buffer memory address to scratch memory."
+  (and (match_code "mem")
+       (match_test "AS_SCRATCH_P (MEM_ADDR_SPACE (op))")))
+
+(define_special_memory_constraint "RF"
+  "Buffer memory address to flat memory."
+  (and (match_code "mem")
+       (match_test "AS_FLAT_P (MEM_ADDR_SPACE (op))
+		    && gcn_flat_address_p (XEXP (op, 0), mode)")))
+
+(define_special_memory_constraint "RS"
+  "Buffer memory address to scalar flat memory."
+  (and (match_code "mem")
+       (match_test "AS_SCALAR_FLAT_P (MEM_ADDR_SPACE (op))
+		    && gcn_scalar_flat_mem_p (op)")))
+
+(define_special_memory_constraint "RL"
+  "Buffer memory address to LDS memory."
+  (and (match_code "mem")
+       (match_test "AS_LDS_P (MEM_ADDR_SPACE (op))")))
+
+(define_special_memory_constraint "RG"
+  "Buffer memory address to GDS memory."
+  (and (match_code "mem")
+       (match_test "AS_GDS_P (MEM_ADDR_SPACE (op))")))
+
+(define_special_memory_constraint "RD"
+  "Buffer memory address to GDS or LDS memory."
+  (and (match_code "mem")
+       (ior (match_test "AS_GDS_P (MEM_ADDR_SPACE (op))")
+	    (match_test "AS_LDS_P (MEM_ADDR_SPACE (op))"))))
+
+(define_special_memory_constraint "RM"
+  "Memory address to global (main) memory."
+  (and (match_code "mem")
+       (match_test "AS_GLOBAL_P (MEM_ADDR_SPACE (op))
+		    && gcn_global_address_p (XEXP (op, 0))")))