--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/config/csky/csky-protos.h	Thu Oct 25 07:37:49 2018 +0900
@@ -0,0 +1,71 @@
+/* Prototype declarations for the C-SKY back end.
+   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/>.  */
+
+#ifndef GCC_CSKY_PROTOS_H
+#define GCC_CSKY_PROTOS_H
+
+extern bool csky_simple_addr_operand_p (rtx);
+extern bool csky_symbolic_address_p (rtx);
+extern bool csky_legitimate_pic_operand_p (rtx);
+
+extern void csky_cpu_cpp_builtins (cpp_reader *);
+
+extern bool csky_inlinable_constant (HOST_WIDE_INT value);
+extern bool csky_shifted_imm8_constant (unsigned HOST_WIDE_INT,
+					unsigned int *, unsigned int *);
+extern bool csky_valid_fpuv2_mem_operand (rtx);
+
+extern bool csky_minipool_load_p (rtx_insn *);
+extern const char *csky_output_move (rtx insn, rtx *, machine_mode);
+extern const char *csky_output_movedouble (rtx *, machine_mode);
+extern const char *csky_output_ck801_move (rtx, rtx *, machine_mode);
+extern const char *csky_output_ck801_movedouble (rtx *, machine_mode);
+extern char *csky_output_call (rtx *, int);
+extern const char *csky_output_casesi (rtx *);
+
+extern bool csky_split_and (rtx *);
+extern bool csky_split_ior (rtx *);
+extern bool csky_split_xor (rtx *);
+
+#ifdef RTX_CODE
+extern bool csky_emit_compare (enum rtx_code, rtx, rtx);
+extern bool csky_emit_compare_float (enum rtx_code, rtx, rtx);
+#endif /* RTX_CODE */
+
+extern rtx csky_return_addr (int, rtx);
+extern void csky_init_expanders (void);
+extern HOST_WIDE_INT csky_initial_elimination_offset (int, int);
+extern void csky_expand_prologue (void);
+extern void csky_expand_epilogue (void);
+extern const char *csky_output_return_instruction (void);
+extern void csky_set_eh_return_address (rtx, rtx);
+
+extern bool csky_symbol_mentioned_p (rtx);
+extern bool csky_label_mentioned_p (rtx);
+extern rtx csky_legitimize_pic_address (rtx, rtx, bool);
+
+extern bool csky_tls_referenced_p (rtx);
+extern rtx csky_legitimize_tls_address (rtx, rtx);
+
+extern int csky_compute_pushpop_length (rtx *);
+
+extern int csky_default_branch_cost (bool, bool);
+extern bool csky_default_logical_op_non_short_circuit (void);
+#endif /* GCC_CSKY_PROTOS_H */