Implement several Fortran operations

This implements several straightforward Fortran operations, primarily
by reusing existing template classes.

gdb/ChangeLog
2021-03-08  Tom Tromey  <tom@tromey.com>

	* f-lang.c (eval_op_f_abs, eval_op_f_mod, eval_op_f_ceil)
	(eval_op_f_floor, eval_op_f_modulo, eval_op_f_cmplx)
	(eval_op_f_kind): No longer static.  Add "opcode" parameter.
	(evaluate_subexp_f): Update.
	* f-exp.h: New file.

1 files changed, 101 insertions, 0 deletions

diff --git a/gdb/f-exp.h b/gdb/f-exp.h
new file mode 100644
index 0000000..4b3fdd4
--- /dev/null
+++ b/gdb/f-exp.h
@@ -0,0 +1,101 @@
+/* Definitions for Fortran expressions
+
+   Copyright (C) 2020 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program 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 of the License, or
+   (at your option) any later version.
+
+   This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#ifndef FORTRAN_EXP_H
+#define FORTRAN_EXP_H
+
+#include "expop.h"
+
+extern struct value *eval_op_f_abs (struct type *expect_type,
+				    struct expression *exp,
+				    enum noside noside,
+				    enum exp_opcode opcode,
+				    struct value *arg1);
+extern struct value *eval_op_f_mod (struct type *expect_type,
+				    struct expression *exp,
+				    enum noside noside,
+				    enum exp_opcode opcode,
+				    struct value *arg1, struct value *arg2);
+extern struct value *eval_op_f_ceil (struct type *expect_type,
+				     struct expression *exp,
+				     enum noside noside,
+				     enum exp_opcode opcode,
+				     struct value *arg1);
+extern struct value *eval_op_f_floor (struct type *expect_type,
+				      struct expression *exp,
+				      enum noside noside,
+				      enum exp_opcode opcode,
+				      struct value *arg1);
+extern struct value *eval_op_f_modulo (struct type *expect_type,
+				       struct expression *exp,
+				       enum noside noside,
+				       enum exp_opcode opcode,
+				       struct value *arg1, struct value *arg2);
+extern struct value *eval_op_f_cmplx (struct type *expect_type,
+				      struct expression *exp,
+				      enum noside noside,
+				      enum exp_opcode opcode,
+				      struct value *arg1, struct value *arg2);
+extern struct value *eval_op_f_kind (struct type *expect_type,
+				     struct expression *exp,
+				     enum noside noside,
+				     enum exp_opcode opcode,
+				     struct value *arg1);
+
+namespace expr
+{
+
+using fortran_abs_operation = unop_operation<UNOP_ABS, eval_op_f_abs>;
+using fortran_ceil_operation = unop_operation<UNOP_FORTRAN_CEILING,
+					      eval_op_f_ceil>;
+using fortran_floor_operation = unop_operation<UNOP_FORTRAN_FLOOR,
+					       eval_op_f_floor>;
+using fortran_kind_operation = unop_operation<UNOP_FORTRAN_KIND,
+					      eval_op_f_kind>;
+
+using fortran_mod_operation = binop_operation<BINOP_MOD, eval_op_f_mod>;
+using fortran_modulo_operation = binop_operation<BINOP_FORTRAN_MODULO,
+						 eval_op_f_modulo>;
+
+/* The Fortran "complex" operation.  */
+class fortran_cmplx_operation
+  : public tuple_holding_operation<operation_up, operation_up>
+{
+public:
+
+  using tuple_holding_operation::tuple_holding_operation;
+
+  value *evaluate (struct type *expect_type,
+		   struct expression *exp,
+		   enum noside noside) override
+  {
+    value *arg1 = std::get<0> (m_storage)->evaluate (nullptr, exp, noside);
+    value *arg2 = std::get<1> (m_storage)->evaluate (value_type (arg1),
+						     exp, noside);
+    return eval_op_f_cmplx (expect_type, exp, noside, BINOP_FORTRAN_CMPLX,
+			    arg1, arg2);
+  }
+
+  enum exp_opcode opcode () const override
+  { return BINOP_FORTRAN_CMPLX; }
+};
+
+} /* namespace expr */
+
+#endif /* FORTRAN_EXP_H */