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diff --git a/gcc/config/crx/crx-protos.h b/gcc/config/crx/crx-protos.h
new file mode 100644
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--- /dev/null
+++ b/gcc/config/crx/crx-protos.h
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+/* Prototypes for exported functions defined in crx.c
+   Copyright (C) 1991, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
+   2002, 2003, 2004, 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/>.  */
+
+#ifndef GCC_CRX_PROTOS_H
+#define GCC_CRX_PROTOS_H
+
+
+/* Register usage. */
+extern enum reg_class crx_regno_reg_class (int);
+extern int crx_hard_regno_mode_ok (int regno, enum machine_mode);
+#ifdef RTX_CODE
+extern enum reg_class crx_secondary_reload_class (enum reg_class, enum machine_mode, rtx);
+#endif /* RTX_CODE */
+
+/* Passing function arguments.  */
+extern int crx_function_arg_regno_p (int);
+#ifdef TREE_CODE
+extern void crx_function_arg_advance (CUMULATIVE_ARGS *, enum machine_mode, tree, int);
+#ifdef RTX_CODE
+extern void crx_init_cumulative_args (CUMULATIVE_ARGS *, tree, rtx);
+extern rtx crx_function_arg (struct cumulative_args *, enum machine_mode, tree, int);
+#endif /* RTX_CODE */
+#endif /* TREE_CODE */
+
+#ifdef RTX_CODE
+/* Addressing Modes.  */
+struct crx_address
+{
+  rtx base, index, disp, side_effect;
+  int scale;
+};
+
+enum crx_addrtype
+{
+  CRX_INVALID, CRX_REG_REL, CRX_POST_INC, CRX_SCALED_INDX, CRX_ABSOLUTE
+};
+
+extern enum crx_addrtype crx_decompose_address (rtx addr, struct crx_address *out);
+extern int crx_legitimate_address_p (enum machine_mode, rtx, int);
+
+extern int crx_const_double_ok (rtx op);
+
+/* Instruction output.  */
+extern void crx_print_operand (FILE *, rtx, int);
+extern void crx_print_operand_address (FILE *, rtx);
+
+/* Misc functions called from crx.md.  */
+extern rtx crx_expand_compare (enum rtx_code, enum machine_mode);
+extern void crx_expand_branch (enum rtx_code, rtx);
+extern void crx_expand_scond (enum rtx_code, rtx);
+
+extern void crx_expand_movmem_single (rtx, rtx, rtx, rtx, rtx, unsigned HOST_WIDE_INT *);
+extern int crx_expand_movmem (rtx, rtx, rtx, rtx);
+#endif /* RTX_CODE */
+
+/* Routines to compute costs.  */
+extern int crx_memory_move_cost (enum machine_mode, enum reg_class, int);
+
+/* Prologue/Epilogue functions.  */
+extern int crx_initial_elimination_offset (int, int);
+extern char *crx_prepare_push_pop_string (int);
+extern void crx_expand_prologue (void);
+extern void crx_expand_epilogue (void);
+
+
+/* Handling the "interrupt" attribute */
+extern int crx_interrupt_function_p (void);
+
+#endif /* GCC_CRX_PROTOS_H */