mirror of https://github.com/uffejakobsen/acme.git
78 lines
3.1 KiB
C
78 lines
3.1 KiB
C
// ACME - a crossassembler for producing 6502/65c02/65816/65ce02 code.
|
|
// Copyright (C) 1998-2020 Marco Baye
|
|
// Have a look at "acme.c" for further info
|
|
//
|
|
// ALU stuff (the expression parser)
|
|
#ifndef alu_H
|
|
#define alu_H
|
|
|
|
|
|
#include "config.h"
|
|
|
|
|
|
struct op;
|
|
struct dynabuf;
|
|
struct type {
|
|
const char *name;
|
|
boolean (*is_defined)(const struct object *self);
|
|
boolean (*differs)(const struct object *self, const struct object *other);
|
|
void (*assign)(struct object *self, const struct object *new_value, boolean accept_change);
|
|
void (*monadic_op)(struct object *self, const struct op *op);
|
|
void (*dyadic_op)(struct object *self, const struct op *op, struct object *other);
|
|
void (*fix_result)(struct object *self);
|
|
void (*print)(const struct object *self, struct dynabuf *db);
|
|
};
|
|
extern struct type type_number;
|
|
extern struct type type_list;
|
|
extern struct type type_string;
|
|
|
|
struct expression {
|
|
struct object result;
|
|
boolean is_empty; // nothing parsed (first character was a delimiter)
|
|
int open_parentheses; // number of parentheses still open
|
|
boolean is_parenthesized; // whole expression was in parentheses (indicating indirect addressing)
|
|
// TODO - how to return reserved cpu constant (register names)?
|
|
};
|
|
|
|
|
|
// constants
|
|
|
|
// flag bits in number struct:
|
|
#define NO_FORCE_BIT 0 // (just to make source more readable)
|
|
#define NUMBER_FORCES_8 (1u << 0) // value usage forces 8-bit usage
|
|
#define NUMBER_FORCES_16 (1u << 1) // value usage forces 16-bit usage
|
|
#define NUMBER_FORCES_24 (1u << 2) // value usage forces 24-bit usage
|
|
#define NUMBER_FORCEBITS (NUMBER_FORCES_8 | NUMBER_FORCES_16 | NUMBER_FORCES_24)
|
|
#define NUMBER_FITS_BYTE (1u << 3) // value is guaranteed to fit in one byte
|
|
#define NUMBER_EVER_UNDEFINED (1u << 4) // value once was related to
|
|
// undefined expression. Needed for producing the same addresses in all
|
|
// passes; because in the first pass there will almost for sure be
|
|
// labels that are undefined, we can't simply get the addressing mode
|
|
// from looking at the parameter's value. FIXME - rename to TAINTED :)
|
|
|
|
/*
|
|
// FIXME - replace all the functions below with a single one using a "flags" arg!
|
|
// its return value would then be "error"/"ok".
|
|
// input flags:
|
|
#define ACCEPT_UNDEFINED (1u << 0) // if not given, undefined throws serious error
|
|
#define ACCEPT_INT (1u << 1)
|
|
#define ACCEPT_FLOAT (1u << 2) // if not given, floats are converted to integer
|
|
#define ACCEPT_OPENPARENTHESIS (1u << 3) // if not given, throws syntax error
|
|
#define ACCEPT_STRING (1u << 4) // if not given, convert 1-char strings to int?
|
|
#define ACCEPT_LIST (1u << 5)
|
|
// do I need ACCEPT_NONADDR and/or ACCEPT_ADDRESS?
|
|
*/
|
|
|
|
// stores int value (0 if result was undefined)
|
|
extern void ALU_any_int(intval_t *target);
|
|
// stores int value and flags (floats are transformed to int)
|
|
// if result was undefined, serious error is thrown
|
|
extern void ALU_defined_int(struct number *intresult);
|
|
// stores int value and flags, allowing for "paren" '(' too many (x-indirect addr).
|
|
extern void ALU_addrmode_int(struct expression *expression, int paren);
|
|
// stores resulting object
|
|
extern void ALU_any_result(struct object *result);
|
|
|
|
|
|
#endif
|