/* expr.h -> header file for expr.c
- Copyright (C) 1987, 92-98, 1999 Free Software Foundation, Inc.
+ Copyright (C) 1987-2020 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,
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, 59 Temple Place - Suite 330, Boston, MA
- 02111-1307, USA. */
+ 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_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. */
+ /* (X_add_symbol - X_op_symbol) + X_add_number. */
O_subtract,
/* (X_add_symbol == X_op_symbol) + X_add_number. */
O_eq,
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
-{
+typedef struct expressionS {
/* The main symbol. */
symbolS *X_add_symbol;
/* The second symbol, if needed. */
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 : 7;
+ operatorT X_op : 8;
#else
- unsigned X_op : 7;
+ 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. */
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;
-extern char get_symbol_end PARAMS ((void));
-extern void expr_begin PARAMS ((void));
-extern void expr_set_precedence PARAMS ((void));
-extern segT expr PARAMS ((int rank, expressionS * resultP));
-extern unsigned int get_single_number PARAMS ((void));
-extern symbolS *make_expr_symbol PARAMS ((expressionS * expressionP));
-extern int expr_symbol_where
- PARAMS ((symbolS *, char **, unsigned int *));
-
-extern symbolS *expr_build_uconstant PARAMS ((offsetT));
-extern symbolS *expr_build_unary PARAMS ((operatorT, symbolS *));
-extern symbolS *expr_build_binary PARAMS ((operatorT, symbolS *, symbolS *));
-extern symbolS *expr_build_dot PARAMS ((void));
-
-/* end of expr.h */
+extern char get_symbol_name (char **);
+extern char restore_line_pointer (char);
+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 *, const char **, unsigned int *);
+extern void current_location (expressionS *);
+
+extern symbolS *expr_build_uconstant (offsetT);
+extern symbolS *expr_build_dot (void);
+
+int resolve_expression (expressionS *);
+
+extern bfd_boolean literal_prefix_dollar_hex;
projects / deliverable / binutils-gdb.git / blobdiff