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- /*-
- * Copyright (c) 1984 The Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
- #ifndef lint
- static char sccsid[] = "@(#)machdep.c 1.4 (Berkeley) 5/8/91";
- #endif /* not lint */
-
- #include <stdio.h>
- #include <ctype.h>
- #include "inline.h"
-
- extern char *strcpy();
- extern char *strcat();
- extern char *index();
-
- /*
- * The routines and tables in this file must be rewritten
- * for each new machine that this program is ported to.
- */
-
- /*
- * Instruction stop table.
- * All instructions that implicitly modify any of the temporary
- * registers, change control flow, or implicitly loop must be
- * listed in this table. It is used to find the end of a basic
- * block when scanning backwards through the instruction stream
- * trying to merge the inline expansion.
- */
- struct inststoptbl inststoptable[] = {
- /* control */
- { "bbssi" }, { "bcc" }, { "bcs" }, { "beql" }, { "beqlu" },
- { "bgeq" }, { "bgequ" }, { "bgtr" }, { "bgtru" }, { "bleq" },
- { "blequ" }, { "blss" }, { "blssu" }, { "bneq" }, { "bnequ" },
- { "brb" }, { "brw" }, { "bvc" }, { "bvs" }, { "jmp" },
- /* jump versions of control */
- { "jbc" }, { "jbs" }, { "jeql" }, { "jeqlu" },
- { "jgeq" }, { "jgequ" }, { "jgtr" }, { "jgtru" }, { "jleq" },
- { "jlequ" }, { "jlss" }, { "jlssu" }, { "jneq" }, { "jnequ" },
- { "jcc" }, { "jcs" }, { "jvc" }, { "jvs" }, { "jbr" },
- /* multiple registers */
- { "loadr" },
- /* bit field */
- { "bbc" }, { "bbs" },
- /* character string and block move */
- { "cmps2" }, { "cmps3" }, { "movblk" }, { "movs2" }, { "movs3" },
- /* procedure call */
- { "callf" }, { "calls" }, { "ret" },
- /* loop control */
- { "aobleq" }, { "aoblss" }, { "casel" },
- /* privileged and miscellaneous */
- { "bpt" }, { "halt" }, { "kcall" }, { "ldpctx" }, { "rei" },
- { "svpctx" },
- { "" }
- };
-
- /*
- * Check to see if a line is a candidate for replacement.
- * Return pointer to name to be looked up in pattern table.
- */
- char *
- doreplaceon(cp)
- char *cp;
- {
-
- if (bcmp(cp, "callf\t", 6))
- return (0);
- if ((cp = index(cp + 6, ',')) == 0)
- return (0);
- return (++cp);
- }
-
- /*
- * Find out how many arguments the function is being called with.
- * A return value of -1 indicates that the count can't be determined.
- */
- countargs(cp)
- char *cp;
- {
- int i;
-
- if ((cp = index(cp, '$')) == 0)
- return (-1);
- if (!isdigit(*++cp) || (i = atoi(cp)) == -1)
- return (-1);
- return (i/4 - 1);
- }
-
- /*
- * Find the next argument to the function being expanded.
- */
- nextarg(argc, argv)
- int argc;
- char *argv[];
- {
- register char *lastarg = argv[2];
-
- if (argc == 3 &&
- bcmp(argv[0], "mov", 3) == 0 &&
- bcmp(argv[1], "(sp)+", 6) == 0 &&
- lastarg[0] == 'r' && isdigit(lastarg[1]) && lastarg[2] == '\0')
- return (lastarg[1] - '0');
- return (-1);
- }
-
- /*
- * Determine whether the current line pushes an argument.
- */
- ispusharg(argc, argv)
- int argc;
- char *argv[];
- {
-
- if (argc < 2)
- return (0);
- if (argc == 2 && bcmp(argv[0], "push", 4) == 0)
- return (1);
- if (bcmp(argv[argc - 1], "-(sp)", 6) == 0)
- return (1);
- return (0);
- }
-
- /*
- * Determine which (if any) registers are modified
- * Return register number that is modified, -1 if none are modified.
- */
- modifies(argc, argv)
- int argc;
- char *argv[];
- {
- register char *lastarg = argv[argc - 1];
-
- /*
- * For the tahoe all we care about are r0 to r5
- */
- if (lastarg[0] == 'r' && isdigit(lastarg[1]) && lastarg[2] == '\0')
- return (lastarg[1] - '0');
- return (-1);
- }
-
- /*
- * Rewrite the instruction in (argc, argv) to store its
- * contents into arg instead of onto the stack. The new
- * instruction is placed in the buffer that is provided.
- */
- rewrite(instbuf, argc, argv, target)
- char *instbuf;
- int argc;
- char *argv[];
- int target;
- {
-
- switch (argc) {
- case 0:
- instbuf[0] = '\0';
- fprintf(stderr, "blank line to rewrite?\n");
- return;
- case 1:
- sprintf(instbuf, "\t%s\n", argv[0]);
- fprintf(stderr, "rewrite?-> %s", instbuf);
- return;
- case 2:
- if (bcmp(argv[0], "push", 4) == 0) {
- sprintf(instbuf, "\tmov%s\t%s,r%d\n",
- &argv[0][4], argv[1], target);
- return;
- }
- sprintf(instbuf, "\t%s\tr%d\n", argv[0], target);
- return;
- case 3:
- sprintf(instbuf, "\t%s\t%s,r%d\n", argv[0], argv[1], target);
- return;
- case 4:
- sprintf(instbuf, "\t%s\t%s,%s,r%d\n",
- argv[0], argv[1], argv[2], target);
- return;
- case 5:
- sprintf(instbuf, "\t%s\t%s,%s,%s,r%d\n",
- argv[0], argv[1], argv[2], argv[3], target);
- return;
- default:
- sprintf(instbuf, "\t%s\t%s", argv[0], argv[1]);
- argc -= 2, argv += 2;
- while (argc-- > 0) {
- strcat(instbuf, ",");
- strcat(instbuf, *argv++);
- }
- strcat(instbuf, "\n");
- fprintf(stderr, "rewrite?-> %s", instbuf);
- return;
- }
- }
-
- /*
- * Do any necessary post expansion cleanup.
- */
- cleanup(numargs)
- int numargs;
- {
-
- }
-