75 lines
2.1 KiB
C
75 lines
2.1 KiB
C
/* $Id$ */
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/*
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* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
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* See the copyright notice in the ACK home directory, in the file "Copyright".
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*/
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/* I N T E R M E D I A T E C O D E
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*
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* G L O B A L C O N S T A N T S & V A R I A B L E S
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*/
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/* Data structures for Intermediate Code generation */
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typedef struct sym *sym_p;
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typedef struct prc *prc_p;
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typedef struct num *num_p;
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struct sym {
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sym_p sy_next; /* link */
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char *sy_name; /* name of the symbol */
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dblock_p sy_dblock; /* pointer to dblock struct */
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};
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struct prc {
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prc_p pr_next; /* link */
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char *pr_name; /* name of the procedure */
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proc_p pr_proc; /* pointer tto proc struct */
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};
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struct num {
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num_p n_next; /* link */
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unsigned n_number; /* EM repr. e.g. 120 in 'BRA *120' */
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lab_id n_labid; /* sequential integer repr. of IC */
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};
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/* macros used by ic_lib.c and ic_io.c: */
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#define ARCHIVE 0
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#define NO_ARCHIVE 1
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/*
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* The next constants are close to sp_cend for fast switches
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*/
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#define INST 256 /* instruction: number in tabval */
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#define PSEU 257 /* pseudo: number in tabval */
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#define ILBX 258 /* label: number in tabval */
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#define DLBX 259 /* symbol: name in string[] */
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#define CSTX1 260 /* short constant: stored in tabval */
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#define CSTX2 261 /* offset: value in tabval2 */
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#define VALX1 262 /* symbol+short: in string[] and tabval */
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#define VALX2 263 /* symbol+offset: in string[] and tabval2 */
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#define ATEOF 264 /* bumped into end of file */
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/* Global variables */
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extern dblock_p db;
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extern dblock_p hol0_db; /* ABS block */
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extern dblock_p ldblock; /* last dblock processed so far */
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extern proc_p lproc; /* last proc processed so far */
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extern short tabval; /* used by table1, table2 and table3 */
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extern offset tabval2;
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extern char string[];
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extern line_p lastline; /* last line read */
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extern int labelcount; /* # labels in current procedure */
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extern obj_id lastoid; /* last object identifier used */
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extern proc_id lastpid; /* last proc identifier used */
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extern lab_id lastlid; /* last label identifier used */
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extern dblock_id lastdid; /* last dblock identifier used */
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extern byte em_flag[];
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