--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/fortran/arith.h	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,87 @@
+/* Compiler arithmetic header.
+   Copyright (C) 2000-2017 Free Software Foundation, Inc.
+   Contributed by Steven Bosscher
+
+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 GFC_ARITH_H
+#define GFC_ARITH_H
+
+/* MPFR also does not have the conversion of a mpfr_t to a mpz_t, so declare
+   a function for this as well.  */
+
+void gfc_mpfr_to_mpz (mpz_t, mpfr_t, locus *);
+void gfc_set_model_kind (int);
+void gfc_set_model (mpfr_t);
+
+/* Make sure a gfc_expr expression is within its allowed range.  Checks
+   for overflow and underflow.  */
+arith gfc_range_check (gfc_expr *);
+
+int gfc_compare_expr (gfc_expr *, gfc_expr *, gfc_intrinsic_op);
+int gfc_compare_string (gfc_expr *, gfc_expr *);
+int gfc_compare_with_Cstring (gfc_expr *, const char *, bool);
+
+
+/* Constant folding for gfc_expr trees.  */
+gfc_expr *gfc_parentheses (gfc_expr * op);
+gfc_expr *gfc_uplus (gfc_expr * op);
+gfc_expr *gfc_uminus (gfc_expr * op);
+gfc_expr *gfc_add (gfc_expr *, gfc_expr *);
+gfc_expr *gfc_subtract (gfc_expr *, gfc_expr *);
+gfc_expr *gfc_multiply (gfc_expr *, gfc_expr *);
+gfc_expr *gfc_divide (gfc_expr *, gfc_expr *);
+gfc_expr *gfc_power (gfc_expr *, gfc_expr *);
+gfc_expr *gfc_concat (gfc_expr *, gfc_expr *);
+gfc_expr *gfc_and (gfc_expr *, gfc_expr *);
+gfc_expr *gfc_or (gfc_expr *, gfc_expr *);
+gfc_expr *gfc_not (gfc_expr *);
+gfc_expr *gfc_eqv (gfc_expr *, gfc_expr *);
+gfc_expr *gfc_neqv (gfc_expr *, gfc_expr *);
+gfc_expr *gfc_eq (gfc_expr *, gfc_expr *, gfc_intrinsic_op);
+gfc_expr *gfc_ne (gfc_expr *, gfc_expr *, gfc_intrinsic_op);
+gfc_expr *gfc_gt (gfc_expr *, gfc_expr *, gfc_intrinsic_op);
+gfc_expr *gfc_ge (gfc_expr *, gfc_expr *, gfc_intrinsic_op);
+gfc_expr *gfc_lt (gfc_expr *, gfc_expr *, gfc_intrinsic_op);
+gfc_expr *gfc_le (gfc_expr *, gfc_expr *, gfc_intrinsic_op);
+
+/* Convert strings to literal constants.  */
+gfc_expr *gfc_convert_integer (const char *, int, int, locus *);
+gfc_expr *gfc_convert_real (const char *, int, locus *);
+gfc_expr *gfc_convert_complex (gfc_expr *, gfc_expr *, int);
+
+/* Convert a constant of one kind to another kind.  */
+gfc_expr *gfc_int2int (gfc_expr *, int);
+gfc_expr *gfc_int2real (gfc_expr *, int);
+gfc_expr *gfc_int2complex (gfc_expr *, int);
+gfc_expr *gfc_real2int (gfc_expr *, int);
+gfc_expr *gfc_real2real (gfc_expr *, int);
+gfc_expr *gfc_real2complex (gfc_expr *, int);
+gfc_expr *gfc_complex2int (gfc_expr *, int);
+gfc_expr *gfc_complex2real (gfc_expr *, int);
+gfc_expr *gfc_complex2complex (gfc_expr *, int);
+gfc_expr *gfc_log2log (gfc_expr *, int);
+gfc_expr *gfc_log2int (gfc_expr *, int);
+gfc_expr *gfc_int2log (gfc_expr *, int);
+gfc_expr *gfc_hollerith2int (gfc_expr *, int);
+gfc_expr *gfc_hollerith2real (gfc_expr *, int);
+gfc_expr *gfc_hollerith2complex (gfc_expr *, int);
+gfc_expr *gfc_hollerith2character (gfc_expr *, int);
+gfc_expr *gfc_hollerith2logical (gfc_expr *, int);
+
+#endif /* GFC_ARITH_H  */
+