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diff --git a/gcc/config/arc/arc700.md b/gcc/config/arc/arc700.md
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+;; DFA scheduling description of the ARC700 cpu for GNU C compiler
+;;    Comments and Support For ARC700 instructions added by
+;;    Saurabh Verma (saurabh.verma@codito.com)
+;;    Ramana Radhakrishnan(ramana.radhakrishnan@codito.com)
+;; Copyright (C) 2006 Free Software Foundation, Inc.
+;;    Factoring out and improvement of ARC700 Scheduling by
+;;    Joern Rennecke (joern.rennecke@arc.com)
+;; Copyright (C) 2007 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_automaton "ARC700")
+
+;; aux to be added here
+(define_cpu_unit "core, dmp,  write_port, dmp_write_port, multiplier, issue, blockage, simd_unit" "ARC700")
+
+(define_insn_reservation "core_insn_DI" 2
+  (and (eq_attr "tune_arc700" "true")
+       (eq_attr "type" "unary, move, cmove, binary")
+       (match_operand:DI 0 "" ""))
+  "issue+core, issue+core+write_port, write_port")
+
+(define_insn_reservation "lr" 2
+  (and (eq_attr "tune_arc700" "true")
+       (eq_attr "type" "lr"))
+  "issue+blockage, blockage*2, write_port")
+
+(define_insn_reservation "sr" 1
+  (and (eq_attr "tune_arc700" "true")
+       (eq_attr "type" "sr"))
+  "issue+dmp_write_port+blockage, blockage*9")
+
+(define_insn_reservation "core_insn" 1
+  (and (eq_attr "tune_arc700" "true")
+       (eq_attr "type" "unary, move, binary"))
+  "issue+core, nothing, write_port")
+
+(define_insn_reservation "cmove" 1
+  (and (eq_attr "tune_arc700" "true")
+       (eq_attr "type" "cmove"))
+  "issue+core, nothing, write_port")
+
+(define_insn_reservation "cc_arith" 1
+  (and (eq_attr "tune_arc700" "true")
+       (eq_attr "type" "cc_arith"))
+  "issue+core, nothing, write_port")
+
+(define_insn_reservation "two_cycle_core_insn" 2
+  (and (eq_attr "tune_arc700" "true")
+       (eq_attr "type" "two_cycle_core"))
+  "issue+core, nothing, write_port")
+
+(define_insn_reservation "divaw_insn" 2
+  (and (eq_attr "tune_arc700" "true")
+       (eq_attr "type" "divaw"))
+  "issue+core, nothing, write_port")
+
+(define_insn_reservation "shift_insn" 2
+  (and (eq_attr "tune_arc700" "true")
+       (eq_attr "type" "shift"))
+  "issue+core, nothing, write_port")
+
+; Latency from flag setters to arithmetic with carry is 3.
+(define_insn_reservation "compare_700" 3
+  (and (eq_attr "tune_arc700" "true")
+       (eq_attr "type" "compare"))
+  "issue+core, nothing, write_port")
+
+; Assume here the branch is predicted correctly and has a delay slot insn
+; or is properly unaligned.
+(define_insn_reservation "branch_700" 1
+  (and (eq_attr "tune_arc700" "true")
+       (eq_attr "type" "compare"))
+  "issue+core, nothing, write_port")
+
+; TODOs: is this correct ??
+(define_insn_reservation "multi_DI" 10
+  (and (eq_attr "tune_arc700" "true")
+       (eq_attr "type" "multi")
+       (match_operand:DI 0 "" ""))
+  "issue+multiplier, multiplier*2,issue+multiplier, multiplier*2, 
+   nothing,write_port,nothing*2, write_port")
+
+(define_insn_reservation "umulti_DI" 9
+  (and (eq_attr "tune_arc700" "true")
+       (eq_attr "type" "umulti")
+       (match_operand:DI 0 "" ""))
+  "issue+multiplier, multiplier,issue+multiplier, multiplier*2, 
+   write_port,nothing*3, write_port")
+
+(define_insn_reservation "umulti_xmac" 5
+  (and (eq_attr "tune_arc700" "true")
+       (eq_attr "type" "umulti"))
+  "issue+multiplier, multiplier, nothing*3, write_port")
+
+; latency of mpyu is lower than mpy / mpyh / mpyhu
+(define_insn_reservation "umulti_std" 6
+  (and (eq_attr "tune_arc700" "true")
+       (eq_attr "type" "umulti"))
+  "issue+multiplier, multiplier*3, nothing*2, write_port")
+
+;; arc700 xmac multiplier
+(define_insn_reservation "multi_xmac" 5
+  (and (eq_attr "tune" "arc700_4_2_xmac")
+       (eq_attr "type" "multi"))
+  "issue+multiplier,multiplier,nothing*3,write_port")
+
+; arc700 standard multiplier
+(define_insn_reservation "multi_std" 7
+  (and (eq_attr "tune" "arc700_4_2_std")
+       (eq_attr "type" "multi"))
+  "issue+multiplier,multiplier*4,nothing*2,write_port")
+
+;(define_insn_reservation "multi_SI" 7
+;       (eq_attr "type" "multi")
+;  "issue+multiplier, multiplier*2, nothing*4, write_port")
+
+; There is no multiplier -> multiplier bypass except for the
+; mac -> mac dependency on the accumulator.
+
+; divaw -> divaw latency is 1 cycle
+(define_bypass 1 "divaw_insn" "divaw_insn")
+
+(define_bypass 1 "compare_700" "branch_700,core_insn,data_store,data_load")
+
+; we could shedule the cmove immediately after the compare, but then
+; the cmove would have higher latency... so just keep the cmove apart
+; from the compare.
+(define_bypass 2 "compare_700" "cmove")
+
+; no functional unit runs when blockage is reserved
+(exclusion_set "blockage" "core, multiplier")
+
+(define_insn_reservation "data_load_DI" 4
+  (and (eq_attr "tune_arc700" "true")
+       (eq_attr "type" "load")
+       (match_operand:DI 0 "" ""))
+  "issue+dmp, issue+dmp, dmp_write_port, dmp_write_port")
+
+(define_insn_reservation "data_load" 3
+  (and (eq_attr "tune_arc700" "true")
+       (eq_attr "type" "load")
+       (not (match_operand:DI 0 "" "")))
+  "issue+dmp, nothing, dmp_write_port")
+
+(define_insn_reservation "data_store_DI" 2
+  (and (eq_attr "tune_arc700" "true")
+       (eq_attr "type" "store")
+       (match_operand:DI 0 "" ""))
+  "issue+dmp_write_port, issue+dmp_write_port")
+
+(define_insn_reservation "data_store" 1
+  (and (eq_attr "tune_arc700" "true")
+       (eq_attr "type" "store")
+       (not (match_operand:DI 0 "" "")))
+  "issue+dmp_write_port")