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3cddb2a3e2
is identical to the older version, just the copyright has changed. Many thanks go to Dean Gehnert of the Linux camp who went the extra mile to make this happen. Other changes: Update assembler man page to include the -v and -D options Merge in Dean's latest changes to the assembler Have the sequencer do a MSG_REJECT when the negotiated syncronous rate is lower than the adapter supports. This forces asyncronous mode which is faster at these rates anyway. This code will be moved shortly to the non-gpld portion of the tree.
644 lines
14 KiB
C
644 lines
14 KiB
C
/*+M*************************************************************************
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* Adaptec AIC7770/AIC7870 sequencer code assembler.
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*
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* Copyright (c) 1994 John Aycock
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* The University of Calgary Department of Computer Science.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of Calgary
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* Department of Computer Science and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* Comments are started by `#' and continue to the end of the line; lines
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* may be of the form:
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* <label>*
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* <label>* <undef-sym> = <value>
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* <label>* <opcode> <operand>*
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*
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* A <label> is an <undef-sym> ending in a colon. Spaces, tabs, and commas
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* are token separators.
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*
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*-M*************************************************************************/
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static char id[] = "$Id$";
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#include <ctype.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#define MEMORY 448
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#define MAXLINE 1024
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#define MAXTOKEN 32
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#define ADOTOUT "a.out"
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#define NOVALUE -1
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/*
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* AIC-7770/AIC-7870 register definitions
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*/
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#define R_SINDEX 0x65
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#define R_ALLONES 0x69
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#define R_ALLZEROS 0x6a
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#define R_NONE 0x6a
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int debug;
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int lineno, LC;
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char *filename;
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FILE *ifp, *ofp;
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unsigned char M[MEMORY][4];
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void
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error(char *s)
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{
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fprintf(stderr, "%s: %s at line %d\n", filename, s, lineno);
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exit(EXIT_FAILURE);
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}
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void *
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Malloc(size_t size)
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{
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void *p = malloc(size);
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if (!p)
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error("out of memory");
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return(p);
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}
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void *
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Realloc(void *ptr, size_t size)
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{
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void *p = realloc(ptr, size);
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if (!p)
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error("out of memory");
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return(p);
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}
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char *
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Strdup(char *s)
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{
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char *p = (char *)Malloc(strlen(s) + 1);
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strcpy(p, s);
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return(p);
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}
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typedef struct sym_t {
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struct sym_t *next; /* MUST BE FIRST */
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char *name;
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int value;
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int npatch;
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int *patch;
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} sym_t;
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sym_t *head;
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void
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define(char *name, int value)
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{
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sym_t *p, *q;
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for (p = head, q = (sym_t *)&head; p; p = p->next) {
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if (!strcmp(p->name, name))
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error("redefined symbol");
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q = p;
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}
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p = q->next = (sym_t *)Malloc(sizeof(sym_t));
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p->next = NULL;
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p->name = Strdup(name);
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p->value = value;
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p->npatch = 0;
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p->patch = NULL;
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if (debug) {
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fprintf(stderr, "\"%s\" ", p->name);
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if (p->value != NOVALUE)
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fprintf(stderr, "defined as 0x%x\n", p->value);
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else
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fprintf(stderr, "undefined\n");
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}
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}
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sym_t *
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lookup(char *name)
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{
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sym_t *p;
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for (p = head; p; p = p->next)
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if (!strcmp(p->name, name))
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return(p);
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return(NULL);
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}
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void
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patch(sym_t *p, int location)
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{
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p->npatch += 1;
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p->patch = (int *)Realloc(p->patch, p->npatch * sizeof(int *));
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p->patch[p->npatch - 1] = location;
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}
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void backpatch(void)
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{
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int i;
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sym_t *p;
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for (p = head; p; p = p->next) {
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if (p->value == NOVALUE) {
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fprintf(stderr,
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"%s: undefined symbol \"%s\"\n",
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filename, p->name);
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exit(EXIT_FAILURE);
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}
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if (p->npatch) {
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if (debug)
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fprintf(stderr,
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"\"%s\" (0x%x) patched at",
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p->name, p->value);
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for (i = 0; i < p->npatch; i++) {
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M[p->patch[i]][0] &= ~1;
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M[p->patch[i]][0] |= ((p->value >> 8) & 1);
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M[p->patch[i]][1] = p->value & 0xff;
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if (debug)
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fprintf(stderr, " 0x%x", p->patch[i]);
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}
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if (debug)
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fputc('\n', stderr);
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}
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}
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}
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/*
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* Output words in byte-reversed order (least significant first)
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* since the sequencer RAM is loaded that way.
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*/
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void
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output(FILE *fp)
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{
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int i;
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for (i = 0; i < LC; i++)
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fprintf(fp, "\t0x%02x, 0x%02x, 0x%02x, 0x%02x,\n",
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M[i][3],
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M[i][2],
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M[i][1],
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M[i][0]);
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printf("%d out of %d instructions used.\n", LC, MEMORY);
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}
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char **
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getl(int *n)
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{
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int i;
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char *p, *quote;
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static char buf[MAXLINE];
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static char *a[MAXTOKEN];
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i = 0;
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while (fgets(buf, sizeof(buf), ifp)) {
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lineno += 1;
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if (buf[strlen(buf)-1] != '\n')
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error("line too long");
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p = strchr(buf, '#');
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if (p)
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*p = '\0';
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p = buf;
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rescan:
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quote = strchr(p, '\"');
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if (quote)
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*quote = '\0';
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for (p = strtok(p, ", \t\n"); p; p = strtok(NULL, ", \t\n"))
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if (i < MAXTOKEN-1)
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a[i++] = p;
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else
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error("too many tokens");
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if (quote) {
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quote++;
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p = strchr(quote, '\"');
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if (!p)
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error("unterminated string constant");
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else if (i < MAXTOKEN-1) {
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a[i++] = quote;
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*p = '\0';
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p++;
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}
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else
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error("too many tokens");
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goto rescan;
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}
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if (i) {
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*n = i;
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return(a);
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}
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}
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return(NULL);
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}
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#define A 0x8000 /* `A'ccumulator ok */
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#define I 0x4000 /* use as immediate value */
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#define SL 0x2000 /* shift left */
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#define SR 0x1000 /* shift right */
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#define RL 0x0800 /* rotate left */
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#define RR 0x0400 /* rotate right */
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#define LO 0x8000 /* lookup: ori-{jmp,jc,jnc,call} */
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#define LA 0x4000 /* lookup: and-{jz,jnz} */
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#define LX 0x2000 /* lookup: xor-{je,jne} */
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#define NA -1 /* not applicable */
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struct {
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char *name;
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int n; /* number of operands, including opcode */
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unsigned int op; /* immediate or L?|pos_from_0 */
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unsigned int dest; /* NA, pos_from_0, or I|immediate */
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unsigned int src; /* NA, pos_from_0, or I|immediate */
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unsigned int imm; /* pos_from_0, A|pos_from_0, or I|immediate */
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unsigned int addr; /* NA or pos_from_0 */
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int fmt; /* instruction format - 1, 2, or 3 */
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} instr[] = {
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/*
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* N OP DEST SRC IMM ADDR FMT
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*/
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{ "mov", 3, 1, 1, 2, I|0xff, NA, 1 },
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{ "mov", 4, LO|2, NA, 1, I|0, 3, 3 },
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{ "mvi", 3, 0, 1, I|R_ALLZEROS, A|2, NA, 1 },
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{ "mvi", 4, LO|2, NA, I|R_ALLZEROS, 1, 3, 3 },
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{ "not", 2, 2, 1, 1, I|0xff, NA, 1 },
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{ "and", 3, 1, 1, 1, A|2, NA, 1 },
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{ "and", 4, 1, 1, 3, A|2, NA, 1 },
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{ "or", 3, 0, 1, 1, A|2, NA, 1 },
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{ "or", 4, 0, 1, 3, A|2, NA, 1 },
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{ "or", 5, LO|3, NA, 1, 2, 4, 3 },
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{ "xor", 3, 2, 1, 1, A|2, NA, 1 },
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{ "xor", 4, 2, 1, 3, A|2, NA, 1 },
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{ "nop", 1, 1, I|R_NONE, I|R_ALLZEROS, I|0xff, NA, 1 },
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{ "inc", 2, 3, 1, 1, I|1, NA, 1 },
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{ "inc", 3, 3, 1, 2, I|1, NA, 1 },
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{ "dec", 2, 3, 1, 1, I|0xff, NA, 1 },
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{ "dec", 3, 3, 1, 2, I|0xff, NA, 1 },
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{ "jmp", 2, LO|0, NA, I|R_SINDEX, I|0, 1, 3 },
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{ "jc", 2, LO|0, NA, I|R_SINDEX, I|0, 1, 3 },
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{ "jnc", 2, LO|0, NA, I|R_SINDEX, I|0, 1, 3 },
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{ "call", 2, LO|0, NA, I|R_SINDEX, I|0, 1, 3 },
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{ "test", 5, LA|3, NA, 1, A|2, 4, 3 },
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{ "cmp", 5, LX|3, NA, 1, A|2, 4, 3 },
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{ "ret", 1, 1, I|R_NONE, I|R_ALLZEROS, I|0xff, NA, 1 },
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{ "ret", 1, 1, I|R_NONE, I|R_ALLZEROS, I|0xff, NA, 1 },
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{ "clc", 1, 3, I|R_NONE, I|R_ALLZEROS, I|1, NA, 1 },
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{ "clc", 4, 3, 2, I|R_ALLZEROS, A|3, NA, 1 },
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{ "stc", 2, 3, 1, I|R_ALLONES, I|1, NA, 1 },
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{ "add", 3, 3, 1, 1, A|2, NA, 1 },
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{ "add", 4, 3, 1, 3, A|2, NA, 1 },
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{ "adc", 3, 4, 1, 1, A|2, NA, 1 },
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{ "adc", 4, 4, 1, 3, A|2, NA, 1 },
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{ "shl", 3, 5, 1, 1, SL|2, NA, 2 },
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{ "shl", 4, 5, 1, 2, SL|3, NA, 2 },
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{ "shr", 3, 5, 1, 1, SR|2, NA, 2 },
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{ "shr", 4, 5, 1, 2, SR|3, NA, 2 },
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{ "rol", 3, 5, 1, 1, RL|2, NA, 2 },
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{ "rol", 4, 5, 1, 2, RL|3, NA, 2 },
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{ "ror", 3, 5, 1, 1, RR|2, NA, 2 },
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{ "ror", 4, 5, 1, 2, RR|3, NA, 2 },
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/*
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* Extensions (note also that mvi allows A)
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*/
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{ "clr", 2, 1, 1, I|R_ALLZEROS, I|0xff, NA, 1 },
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{ 0, 0, 0, 0, 0, 0, 0, 0 }
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};
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int
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eval_operand(char **a, int spec)
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{
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int i;
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unsigned int want = spec & (LO|LA|LX);
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static struct {
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unsigned int what;
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char *name;
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int value;
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} jmptab[] = {
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{ LO, "jmp", 8 },
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{ LO, "jc", 9 },
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{ LO, "jnc", 10 },
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{ LO, "call", 11 },
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{ LA, "jz", 15 },
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{ LA, "jnz", 13 },
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{ LX, "je", 14 },
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{ LX, "jne", 12 },
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};
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spec &= ~(LO|LA|LX);
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for (i = 0; i < sizeof(jmptab)/sizeof(jmptab[0]); i++)
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if (jmptab[i].what == want &&
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!strcmp(jmptab[i].name, a[spec]))
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{
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return(jmptab[i].value);
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}
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if (want)
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error("invalid jump");
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return(spec); /* "case 0" - no flags set */
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}
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int
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eval_sdi(char **a, int spec)
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{
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sym_t *p;
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unsigned val;
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if (spec == NA)
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return(NA);
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switch (spec & (A|I|SL|SR|RL|RR)) {
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case SL:
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case SR:
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case RL:
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case RR:
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if (isdigit(*a[spec &~ (SL|SR|RL|RR)]))
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val = strtol(a[spec &~ (SL|SR|RL|RR)], NULL, 0);
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else {
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p = lookup(a[spec &~ (SL|SR|RL|RR)]);
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if (!p)
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error("undefined symbol used");
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val = p->value;
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}
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switch (spec & (SL|SR|RL|RR)) { /* blech */
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case SL:
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if (val > 7)
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return(0xf0);
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return(((val % 8) << 4) |
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(val % 8));
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case SR:
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if (val > 7)
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return(0xf0);
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return(((val % 8) << 4) |
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(1 << 3) |
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((8 - (val % 8)) % 8));
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case RL:
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return(val % 8);
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case RR:
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return((8 - (val % 8)) % 8);
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}
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case I:
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return(spec &~ I);
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case A:
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/*
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* An immediate field of zero selects
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* the accumulator. Vigorously object
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* if zero is given otherwise - it's
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* most likely an error.
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*/
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spec &= ~A;
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if (!strcmp("A", a[spec]))
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return(0);
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if (isdigit(*a[spec]) &&
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strtol(a[spec], NULL, 0) == 0)
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{
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error("immediate value of zero selects accumulator");
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}
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/* falls through */
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case 0:
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if (isdigit(*a[spec]))
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return(strtol(a[spec], NULL, 0));
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p = lookup(a[spec]);
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if (p)
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return(p->value);
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error("undefined symbol used");
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}
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return(NA); /* shut the compiler up */
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}
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int
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eval_addr(char **a, int spec)
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{
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sym_t *p;
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if (spec == NA)
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return(NA);
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if (isdigit(*a[spec]))
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return(strtol(a[spec], NULL, 0));
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p = lookup(a[spec]);
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if (p) {
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if (p->value != NOVALUE)
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return(p->value);
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patch(p, LC);
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} else {
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define(a[spec], NOVALUE);
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p = lookup(a[spec]);
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patch(p, LC);
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}
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return(NA); /* will be patched in later */
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}
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int
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crack(char **a, int n)
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{
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int i;
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int I_imm, I_addr;
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int I_op, I_dest, I_src, I_ret;
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/*
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* Check for "ret" at the end of the line; remove
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* it unless it's "ret" alone - we still want to
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* look it up in the table.
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*/
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I_ret = (strcmp(a[n-1], "ret") ? 0 : !0);
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if (I_ret && n > 1)
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n -= 1;
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for (i = 0; instr[i].name; i++) {
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/*
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* Look for match in table given constraints,
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* currently just the name and the number of
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* operands.
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*/
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if (!strcmp(instr[i].name, *a) && instr[i].n == n)
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break;
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}
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if (!instr[i].name)
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error("unknown opcode or wrong number of operands");
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I_op = eval_operand(a, instr[i].op);
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I_src = eval_sdi(a, instr[i].src);
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I_imm = eval_sdi(a, instr[i].imm);
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I_dest = eval_sdi(a, instr[i].dest);
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I_addr = eval_addr(a, instr[i].addr);
|
|
|
|
if( LC >= MEMORY )
|
|
error("Memory exhausted!\n");
|
|
|
|
switch (instr[i].fmt) {
|
|
case 1:
|
|
case 2:
|
|
M[LC][0] = (I_op << 1) | I_ret;
|
|
M[LC][1] = I_dest;
|
|
M[LC][2] = I_src;
|
|
M[LC][3] = I_imm;
|
|
break;
|
|
case 3:
|
|
if (I_ret)
|
|
error("illegal use of \"ret\"");
|
|
M[LC][0] = (I_op << 1) | ((I_addr >> 8) & 1);
|
|
M[LC][1] = I_addr & 0xff;
|
|
M[LC][2] = I_src;
|
|
M[LC][3] = I_imm;
|
|
break;
|
|
}
|
|
|
|
return (1); /* no two-byte instructions yet */
|
|
}
|
|
|
|
#undef SL
|
|
#undef SR
|
|
#undef RL
|
|
#undef RR
|
|
#undef LX
|
|
#undef LA
|
|
#undef LO
|
|
#undef I
|
|
#undef A
|
|
|
|
void
|
|
assemble(void)
|
|
{
|
|
int n;
|
|
char **a;
|
|
sym_t *p;
|
|
|
|
while ((a = getl(&n))) {
|
|
|
|
while (a[0][strlen(*a)-1] == ':') {
|
|
a[0][strlen(*a)-1] = '\0';
|
|
p = lookup(*a);
|
|
if (p)
|
|
p->value = LC;
|
|
else
|
|
define(*a, LC);
|
|
a += 1;
|
|
n -= 1;
|
|
}
|
|
|
|
if (!n) /* line was all labels */
|
|
continue;
|
|
|
|
if (n == 3 && !strcmp("VERSION", *a))
|
|
fprintf(ofp, "#define %s \"%s\"\n", a[1], a[2]);
|
|
else {
|
|
if (n == 3 && !strcmp("=", a[1]))
|
|
define(*a, strtol(a[2], NULL, 0));
|
|
else
|
|
LC += crack(a, n);
|
|
}
|
|
}
|
|
|
|
backpatch();
|
|
output(ofp);
|
|
|
|
if (debug)
|
|
output(stderr);
|
|
}
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
int c;
|
|
|
|
while ((c = getopt(argc, argv, "dho:vD")) != EOF) {
|
|
switch (c) {
|
|
case 'd':
|
|
debug = !0;
|
|
break;
|
|
case 'D':
|
|
{
|
|
char *p;
|
|
if ((p = strchr(optarg, '=')) != NULL) {
|
|
*p = '\0';
|
|
define(optarg, strtol(p + 1, NULL, 0));
|
|
}
|
|
else
|
|
define(optarg, 1);
|
|
break;
|
|
}
|
|
case 'o':
|
|
ofp = fopen(optarg, "w");
|
|
if (!ofp) {
|
|
perror(optarg);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
break;
|
|
case 'h':
|
|
printf("usage: %s [-d] [-Dname] [-ooutput] input\n",
|
|
*argv);
|
|
exit(EXIT_SUCCESS);
|
|
break;
|
|
case 'v':
|
|
printf("%s\n", id);
|
|
exit(EXIT_SUCCESS);
|
|
break;
|
|
default:
|
|
exit(EXIT_FAILURE);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (argc - optind != 1) {
|
|
fprintf(stderr, "%s: must have one input file\n", *argv);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
filename = argv[optind];
|
|
|
|
ifp = fopen(filename, "r");
|
|
if (!ifp) {
|
|
perror(filename);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
if (!ofp) {
|
|
ofp = fopen(ADOTOUT, "w");
|
|
if (!ofp) {
|
|
perror(ADOTOUT);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
}
|
|
|
|
assemble();
|
|
exit(EXIT_SUCCESS);
|
|
}
|