--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/config/csky/csky_pipeline_ck801.md	Thu Oct 25 07:37:49 2018 +0900
@@ -0,0 +1,54 @@
+;; Scheduler information for C-SKY CK801 processors.
+;; Copyright (C) 2018 Free Software Foundation, Inc.
+;; Contributed by C-SKY Microsystems and Mentor Graphics.
+;;
+;; 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/>.  */
+
+;; This is just a placeholder for a more accurate pipeline
+;; description for CK801.
+
+(define_automaton "ck801")
+
+(define_cpu_unit "ck801_ex1" "ck801")
+(define_cpu_unit "ck801_exit" "ck801")
+
+(define_insn_reservation "ck801_generic" 1
+  (and (match_test "CSKY_TARGET_ARCH (CK801)")
+       (eq_attr "type" "alu,cmp,branch,cbranch,addsub,alu_ix,branch_jmp,call_jsr,call"))
+  "ck801_ex1+ck801_exit")
+
+(define_insn_reservation "ck801_load" 1
+  (and (match_test "CSKY_TARGET_ARCH (CK801)")
+       (and (eq_attr "type" "load")
+	    (match_test "!csky_minipool_load_p (insn)")))
+  "ck801_ex1+ck801_exit")
+
+(define_insn_reservation "ck801_pool" 1
+  (and (match_test "CSKY_TARGET_ARCH (CK801)")
+       (and (eq_attr "type" "load")
+	    (match_test "csky_minipool_load_p (insn)")))
+  "ck801_ex1+ck801_exit")
+
+(define_insn_reservation "ck801_store" 1
+  (and (match_test "CSKY_TARGET_ARCH (CK801)")
+       (eq_attr "type" "store"))
+  "ck801_ex1+ck801_exit")
+
+;; Switching between constant pool loads and loads/stores in the data section
+;; carries an extra penalty.
+(define_bypass 2 "ck801_load,ck801_store" "ck801_pool")
+(define_bypass 2 "ck801_pool" "ck801_load,ck801_store")