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+;; Faraday FA606TE Pipeline Description
+;; Copyright (C) 2010 Free Software Foundation, Inc.
+;; Written by Mingfeng Wu, based on ARM926EJ-S Pipeline Description.
+;;
+;; 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/>.  */
+
+;; These descriptions are based on the information contained in the
+;; FA606TE Core Design Note, Copyright (c) 2010 Faraday Technology Corp.
+
+;; Modeled pipeline characteristics:
+;; LD -> any use: latency = 2 (1 cycle penalty).
+;; ALU -> any use: latency = 1 (0 cycle penalty).
+
+;; This automaton provides a pipeline description for the Faraday
+;; FA606TE core.
+;;
+;; The model given here assumes that the condition for all conditional
+;; instructions is "true", i.e., that all of the instructions are
+;; actually executed.
+
+(define_automaton "fa606te")
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Pipelines
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+;; There is a single pipeline
+;;
+;;   The ALU pipeline has fetch, decode, execute, memory, and
+;;   write stages.  We only need to model the execute, memory and write
+;;   stages.
+
+;;      E      M      W
+
+(define_cpu_unit "fa606te_core" "fa606te")
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; ALU Instructions
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+;; ALU instructions require two cycles to execute, and use the ALU
+;; pipeline in each of the three stages.  The results are available
+;; after the execute stage stage has finished.
+;;
+;; If the destination register is the PC, the pipelines are stalled
+;; for several cycles.  That case is not modeled here.
+
+;; ALU operations
+(define_insn_reservation "606te_alu_op" 1
+ (and (eq_attr "tune" "fa606te")
+      (eq_attr "type" "alu,alu_shift,alu_shift_reg"))
+ "fa606te_core")
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Multiplication Instructions
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+(define_insn_reservation "606te_mult1" 2
+ (and (eq_attr "tune" "fa606te")
+      (eq_attr "insn" "smlalxy"))
+ "fa606te_core")
+
+(define_insn_reservation "606te_mult2" 3
+ (and (eq_attr "tune" "fa606te")
+      (eq_attr "insn" "smlaxy,smulxy,smulwy,smlawy"))
+ "fa606te_core*2")
+
+(define_insn_reservation "606te_mult3" 4
+ (and (eq_attr "tune" "fa606te")
+      (eq_attr "insn" "mul,mla,muls,mlas"))
+ "fa606te_core*3")
+
+(define_insn_reservation "606te_mult4" 5
+ (and (eq_attr "tune" "fa606te")
+      (eq_attr "insn" "umull,umlal,smull,smlal,umulls,umlals,smulls,smlals"))
+ "fa606te_core*4")
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Load/Store Instructions
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+;; The models for load/store instructions do not accurately describe
+;; the difference between operations with a base register writeback
+;; (such as "ldm!").  These models assume that all memory references
+;; hit in dcache.
+
+(define_insn_reservation "606te_load1_op" 2
+ (and (eq_attr "tune" "fa606te")
+      (eq_attr "type" "load1,load_byte"))
+ "fa606te_core")
+
+(define_insn_reservation "606te_load2_op" 3
+ (and (eq_attr "tune" "fa606te")
+      (eq_attr "type" "load2"))
+ "fa606te_core*2")
+
+(define_insn_reservation "606te_load3_op" 4
+ (and (eq_attr "tune" "fa606te")
+      (eq_attr "type" "load3"))
+ "fa606te_core*3")
+
+(define_insn_reservation "606te_load4_op" 5
+ (and (eq_attr "tune" "fa606te")
+      (eq_attr "type" "load4"))
+ "fa606te_core*4")
+
+(define_insn_reservation "606te_store1_op" 0
+ (and (eq_attr "tune" "fa606te")
+      (eq_attr "type" "store1"))
+ "fa606te_core")
+
+(define_insn_reservation "606te_store2_op" 1
+ (and (eq_attr "tune" "fa606te")
+      (eq_attr "type" "store2"))
+ "fa606te_core*2")
+
+(define_insn_reservation "606te_store3_op" 2
+ (and (eq_attr "tune" "fa606te")
+      (eq_attr "type" "store3"))
+ "fa606te_core*3")
+
+(define_insn_reservation "606te_store4_op" 3
+ (and (eq_attr "tune" "fa606te")
+      (eq_attr "type" "store4"))
+ "fa606te_core*4")
+
+
+;;(define_insn_reservation "606te_ldm_op" 9
+;; (and (eq_attr "tune" "fa606te")
+;;      (eq_attr "type" "load2,load3,load4,store2,store3,store4"))
+;; "fa606te_core*7")
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Branch and Call Instructions
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+;; Branch instructions are difficult to model accurately.  The FA606TE
+;; core can predict most branches.  If the branch is predicted
+;; correctly, and predicted early enough, the branch can be completely
+;; eliminated from the instruction stream.  Some branches can
+;; therefore appear to require zero cycles to execute.  We assume that
+;; all branches are predicted correctly, and that the latency is
+;; therefore the minimum value.
+
+(define_insn_reservation "606te_branch_op" 0
+ (and (eq_attr "tune" "fa606te")
+      (eq_attr "type" "branch"))
+ "fa606te_core")
+
+;; The latency for a call is actually the latency when the result is available.
+;; i.e. R0 ready for int return value.  For most cases, the return value is set
+;; by a mov instruction, which has 1 cycle latency.
+(define_insn_reservation "606te_call_op" 1
+ (and (eq_attr "tune" "fa606te")
+      (eq_attr "type" "call"))
+ "fa606te_core")
+