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diff --git a/gcc-4.9/gcc/config/arc/arc600.md b/gcc-4.9/gcc/config/arc/arc600.md
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+;; DFA scheduling description of the Synopsys DesignWare ARC600 cpu
+;; for GNU C compiler
+;; Copyright (C) 2007-2014 Free Software Foundation, Inc.
+;; Contributor: Joern Rennecke <joern.rennecke@embecosm.com>
+;;              on behalf of Synopsys 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_automaton "ARC600")
+
+(define_cpu_unit "issue_600" "ARC600")
+(define_cpu_unit "mul64_600" "ARC600")
+
+; latency from flag-setting insns to branches is 3.
+(define_insn_reservation "compare_600" 3
+  (and (eq_attr "tune" "arc600")
+       (eq_attr "type" "compare"))
+  "issue_600")
+
+(define_insn_reservation "load_DI_600" 4
+  (and (eq_attr "tune" "arc600")
+       (eq_attr "type" "load")
+       (match_operand:DI 0 "" ""))
+  "issue_600")
+
+(define_insn_reservation "load_600" 3
+  (and (eq_attr "tune" "arc600")
+       (eq_attr "type" "load")
+       (not (match_operand:DI 0 "" "")))
+  "issue_600")
+
+(define_insn_reservation "mul_600_fast" 3
+  (and (eq_attr "tune" "arc600")
+       (match_test "arc_multcost < COSTS_N_INSNS (7)")
+       (eq_attr "type" "multi,umulti"))
+  "mul64_600*3")
+
+(define_insn_reservation "mul_600_slow" 8
+  (and (eq_attr "tune" "arc600")
+       (match_test "arc_multcost >= COSTS_N_INSNS (7)")
+       (eq_attr "type" "multi,umulti"))
+  "mul64_600*8")
+
+(define_insn_reservation "mul_mac_600" 3
+  (and (eq_attr "tune" "arc600")
+       (eq_attr "type" "mulmac_600"))
+  "nothing*3")
+
+(define_bypass 1 "mul_mac_600" "mul_mac_600")