/* expr.h -> header file for expr.c
- Copyright (C) 1987, 1992, 1993 Free Software Foundation, Inc.
+ Copyright 1987, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
+ 2002, 2003, 2005, 2007, 2009 Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
GAS 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 2, or (at your option)
+ the Free Software Foundation; either version 3, or (at your option)
any later version.
GAS is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with GAS; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+ along with GAS; see the file COPYING. If not, write to the Free
+ Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
+ 02110-1301, USA. */
/*
* By popular demand, we define a struct to represent an expression.
NOTE: This enumeration must match the op_rank array in expr.c. */
-typedef enum
-{
+typedef enum {
/* An illegal expression. */
O_illegal,
/* A nonexistent expression. */
O_constant,
/* X_add_symbol + X_add_number. */
O_symbol,
+ /* X_add_symbol + X_add_number - the base address of the image. */
+ O_symbol_rva,
/* A register (X_add_number is register number). */
O_register,
/* A big value. If X_add_number is negative or 0, the value is in
O_uminus,
/* (~ X_add_symbol) + X_add_number. */
O_bit_not,
+ /* (! X_add_symbol) + X_add_number. */
+ O_logical_not,
/* (X_add_symbol * X_op_symbol) + X_add_number. */
O_multiply,
/* (X_add_symbol / X_op_symbol) + X_add_number. */
O_divide,
- /* X_add_symbol % X_op_symbol) + X_add_number. */
+ /* (X_add_symbol % X_op_symbol) + X_add_number. */
O_modulus,
- /* X_add_symbol << X_op_symbol) + X_add_number. */
+ /* (X_add_symbol << X_op_symbol) + X_add_number. */
O_left_shift,
- /* X_add_symbol >> X_op_symbol) + X_add_number. */
+ /* (X_add_symbol >> X_op_symbol) + X_add_number. */
O_right_shift,
- /* X_add_symbol | X_op_symbol) + X_add_number. */
+ /* (X_add_symbol | X_op_symbol) + X_add_number. */
O_bit_inclusive_or,
- /* X_add_symbol |~ X_op_symbol) + X_add_number. */
+ /* (X_add_symbol |~ X_op_symbol) + X_add_number. */
O_bit_or_not,
- /* X_add_symbol ^ X_op_symbol) + X_add_number. */
+ /* (X_add_symbol ^ X_op_symbol) + X_add_number. */
O_bit_exclusive_or,
- /* X_add_symbol & X_op_symbol) + X_add_number. */
+ /* (X_add_symbol & X_op_symbol) + X_add_number. */
O_bit_and,
- /* X_add_symbol + X_op_symbol) + X_add_number. */
+ /* (X_add_symbol + X_op_symbol) + X_add_number. */
O_add,
- /* X_add_symbol - X_op_symbol) + X_add_number. */
- O_subtract
+ /* (X_add_symbol - X_op_symbol) + X_add_number. */
+ O_subtract,
+ /* (X_add_symbol == X_op_symbol) + X_add_number. */
+ O_eq,
+ /* (X_add_symbol != X_op_symbol) + X_add_number. */
+ O_ne,
+ /* (X_add_symbol < X_op_symbol) + X_add_number. */
+ O_lt,
+ /* (X_add_symbol <= X_op_symbol) + X_add_number. */
+ O_le,
+ /* (X_add_symbol >= X_op_symbol) + X_add_number. */
+ O_ge,
+ /* (X_add_symbol > X_op_symbol) + X_add_number. */
+ O_gt,
+ /* (X_add_symbol && X_op_symbol) + X_add_number. */
+ O_logical_and,
+ /* (X_add_symbol || X_op_symbol) + X_add_number. */
+ O_logical_or,
+ /* X_op_symbol [ X_add_symbol ] */
+ O_index,
+ /* machine dependent operators */
+ O_md1, O_md2, O_md3, O_md4, O_md5, O_md6, O_md7, O_md8,
+ O_md9, O_md10, O_md11, O_md12, O_md13, O_md14, O_md15, O_md16,
+ O_md17, O_md18, O_md19, O_md20, O_md21, O_md22, O_md23, O_md24,
+ O_md25, O_md26, O_md27, O_md28, O_md29, O_md30, O_md31, O_md32,
+ /* this must be the largest value */
+ O_max
} operatorT;
-typedef struct expressionS
-{
- /* The type of the expression. */
- operatorT X_op;
+typedef struct expressionS {
/* The main symbol. */
- struct symbol *X_add_symbol;
+ symbolS *X_add_symbol;
/* The second symbol, if needed. */
- struct symbol *X_op_symbol;
+ symbolS *X_op_symbol;
/* A number to add. */
offsetT X_add_number;
+
+ /* The type of the expression. We can't assume that an arbitrary
+ compiler can handle a bitfield of enum type. FIXME: We could
+ check this using autoconf. */
+#ifdef __GNUC__
+ operatorT X_op : 8;
+#else
+ unsigned char X_op;
+#endif
+
/* Non-zero if X_add_number should be regarded as unsigned. This is
only valid for O_constant expressions. It is only used when an
O_constant must be extended into a bignum (i.e., it is not used
when performing arithmetic on these values).
- FIXME: This field is not set very reliably.
- If we ever need more flags here, we can make them bitfields. */
- int X_unsigned;
+ FIXME: This field is not set very reliably. */
+ unsigned int X_unsigned : 1;
+ /* This is used to implement "word size + 1 bit" arithmetic, so that e.g.
+ expressions used with .sleb128 directives can use the full range available
+ for an unsigned word, but can also properly represent all values of a
+ signed word. */
+ unsigned int X_extrabit : 1;
+
+ /* 7 additional bits can be defined if needed. */
+
+ /* Machine dependent field */
+ unsigned short X_md;
} expressionS;
-/* "result" should be type (expressionS *). */
-#define expression(result) expr (0, result)
+enum expr_mode
+{
+ expr_evaluate,
+ expr_normal,
+ expr_defer
+};
+
+/* "result" should be type (expressionS *). */
+#define expression(result) expr (0, result, expr_normal)
+#define expression_and_evaluate(result) expr (0, result, expr_evaluate)
+#define deferred_expression(result) expr (0, result, expr_defer)
/* If an expression is O_big, look here for its value. These common
- data may be clobbered whenever expr() is called. */
-/* Flonums returned here. Big enough to hold most precise flonum. */
+ data may be clobbered whenever expr() is called. */
+/* Flonums returned here. Big enough to hold most precise flonum. */
extern FLONUM_TYPE generic_floating_point_number;
-/* Bignums returned here. */
+/* Bignums returned here. */
extern LITTLENUM_TYPE generic_bignum[];
-/* Number of littlenums in above. */
+/* Number of littlenums in above. */
#define SIZE_OF_LARGE_NUMBER (20)
typedef char operator_rankT;
-char get_symbol_end PARAMS ((void));
-segT expr PARAMS ((int rank, expressionS * resultP));
-unsigned int get_single_number PARAMS ((void));
-symbolS *make_expr_symbol PARAMS ((expressionS * expressionP));
+extern char get_symbol_end (void);
+extern void expr_begin (void);
+extern void expr_set_precedence (void);
+extern void expr_set_rank (operatorT, operator_rankT);
+extern void add_to_result (expressionS *, offsetT, int);
+extern void subtract_from_result (expressionS *, offsetT, int);
+extern segT expr (int, expressionS *, enum expr_mode);
+extern unsigned int get_single_number (void);
+extern symbolS *make_expr_symbol (expressionS * expressionP);
+extern int expr_symbol_where (symbolS *, char **, unsigned int *);
+extern void current_location (expressionS *);
+
+extern symbolS *expr_build_uconstant (offsetT);
+extern symbolS *expr_build_dot (void);
-/* end of expr.h */
+int resolve_expression (expressionS *);