c210959c49
* lib.c (dump)[MES_HACK]: Dump small hello-world sexp, to be handled by * doc/examples/tiny-mes.c (display_): New function. * module/mes/libc-i386.mes (i386:accu->base, i386:mem->accu, i386:mem+n->accu): New functions. * module/mes/libc-i386.scm: Export them. * GNUmakefile (mes-32): New target.
362 lines
6.2 KiB
C
362 lines
6.2 KiB
C
/* -*-comment-start: "//";comment-end:""-*-
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* Mes --- Maxwell Equations of Software
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* Copyright © 2016,2017 Jan Nieuwenhuizen <janneke@gnu.org>
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*
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* This file is part of Mes.
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*
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* Mes is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or (at
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* your option) any later version.
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*
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* Mes is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Mes. If not, see <http://www.gnu.org/licenses/>.
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*/
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#if __GNUC__
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void
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exit (int code)
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{
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asm (
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"movl %0,%%ebx\n\t"
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"movl $1,%%eax\n\t"
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"int $0x80"
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: // no outputs "=" (r)
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: "" (code)
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);
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// not reached
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exit (0);
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}
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void
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write (int fd, char const* s, int n)
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{
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int r;
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//syscall (SYS_write, fd, s, n));
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asm (
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"mov %0,%%ebx\n\t"
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"mov %1,%%ecx\n\t"
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"mov %2,%%edx\n\t"
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"mov $0x4,%%eax\n\t"
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"int $0x80\n\t"
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: // no outputs "=" (r)
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: "" (fd), "" (s), "" (n)
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: "eax", "ebx", "ecx", "edx"
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);
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}
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#define STDOUT 1
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typedef long size_t;
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size_t
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strlen (char const* s)
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{
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int i = 0;
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while (s[i]) i++;
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return i;
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}
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int
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puts (char const* s)
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{
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//write (STDOUT, s, strlen (s));
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//int i = write (STDOUT, s, strlen (s));
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int i = strlen (s);
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write (1, s, i);
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return 0;
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}
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int
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putchar (int c)
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{
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//write (STDOUT, s, strlen (s));
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//int i = write (STDOUT, s, strlen (s));
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write (1, (char*)&c, 1);
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return 0;
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}
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int
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strcmp (char const* a, char const* b)
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{
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while (*a && *b && *a == *b) {a++;b++;}
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return *a - *b;
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}
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int test (char *p);
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#endif
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// struct scm {
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// int type;
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// int car;
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// int cdr;
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// };
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char arena[20];
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char *g_cells = arena;
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int
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main (int argc, char *argv[])
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{
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char *p = "t.c\n";
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puts ("t.c\n");
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if (argc > 1 && !strcmp (argv[1], "--help")) return 1;
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puts ("t: if (argc > 1 && !strcmp (argv[1], \"--help\")\n");
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// FIXME mescc?!
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if (argc > 1) if (!strcmp (argv[1], "--help")) return 1;
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return test (p);
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return 22;
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}
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int
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swits (int c)
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{
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int x = -1;
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switch (c)
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{
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case 0:
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{
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x = 0;
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c = 34;
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break;
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}
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case 1:
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{
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x = 1;
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break;
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}
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default:
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{
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x = 2;
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break;
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}
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}
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return x;
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}
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int
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test (char *p)
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{
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int f = 0;
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int t = 1;
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int one = 1;
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char c = 'C';
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puts ("t: if (0)\n");
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if (0) return 1;
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puts ("t: if (f)\n");
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if (f) return 1;
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puts ("t: if (one > 1)\n");
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if (one > 1) return 1;
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puts ("t: if (one < 0)\n");
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if (one < 0) return 1;
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puts ("t: if (strlen (\"\"))\n");
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if (strlen ("")) return 1;
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puts ("t: if (strlen (p) != 4)\n");
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if (strlen (p) != 4) return 1;
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puts ("t: if (!strlen (\".\"))\n");
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if (!strlen (".")) return 1;
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puts ("t: if (strcmp (p, \"foo\"))\n");
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if (!strcmp (p, "foo")) return 1;
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puts ("t: if (strcmp (p, \"t.c\\n\"))\n");
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if (strcmp (p, "t.c\n")) return 1;
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puts ("t: if (!1)\n");
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if (!1) return 1;
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puts ("t: if (one == 0)\n");
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if (one == 0) return 1;
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puts ("t: if (f != 0)\n");
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if (one != 1) return 1;
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puts ("t: if (1 && 0)\n");
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if (1 && 0) return 1;
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puts ("t: if (!t && f)\n");
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if (!t && f) return 1;
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puts ("t: if (t && !one)\n");
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if (t && !one) return 1;
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int i=0;
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puts ("t: if (i++)\n");
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if (i++) return 1;
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puts ("t: if (--i)\n");
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if (--i) return 1;
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puts ("t: (one == 1) ?\n");
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(one == 1) ? 1 : exit (1);
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puts ("t: (f) ?\n");
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(f) ? exit (1) : 1;
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puts ("t: *g_cells != 'A'\n");
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arena[0] = 'A';
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if (*g_cells != 'A') return 1;
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puts ("t: *x != 'A'\n");
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char *x = g_cells;
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if (*x != 'A') return 1;
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puts ("t: *x != 'Q'\n");
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g_cells[0] = 'Q';
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if (*x != 'Q') return 1;
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puts ("t: *x++ != 'C'\n");
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*x++ = c;
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if (*g_cells != 'C') return 1;
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puts ("t: switch 0\n");
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if (swits (0) != 0) return swits (0);
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puts ("t: switch 1\n");
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if (swits (1) != 1) return 1;
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puts ("t: switch -1\n");
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if (swits (-1) != 2) return 1;
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puts ("t: if (1)\n");
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if (1) goto ok0;
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return 1;
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ok0:
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puts ("t: if (t)\n");
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if (t) goto ok1;
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return 1;
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ok1:
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puts ("t: if (one > 0)\n");
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if (one > 0) goto ok2;
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return 1;
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ok2:
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puts ("t: if (one < 2)\n");
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if (one < 2) goto ok3;
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return 1;
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ok3:
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puts ("t: if (strlen (\".\"))\n");
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if (strlen (".")) goto ok4;
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return 1;
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ok4:
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puts ("t: if (strlen (p) == 4)\n");
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if (strlen (p) == 4) goto ok40;
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ok40:
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puts ("t: if (!strcmp (p, \"t.c\\n\"))\n");
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if (!strcmp (p, "t.c\n")) goto ok41;
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return 1;
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ok41:
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puts ("t: if (strcmp (p, \"foo\"))\n");
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if (strcmp (p, "foo")) goto ok42;
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return 1;
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ok42:
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puts ("t: if (!0)\n");
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if (!0) goto ok5;
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return 1;
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ok5:
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puts ("t: if (one == 1)\n");
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if (one == 1) goto ok6;
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return 1;
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ok6:
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puts ("t: if (one != 0)\n");
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if (one != 0) goto ok7;
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return 1;
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ok7:
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puts ("t: if (1 && !0)\n");
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if (1 && !0) goto ok8;
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return 1;
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ok8:
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puts ("t: if (++i)\n");
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if (++i) goto ok9;
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return 1;
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ok9:
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puts ("t: if (i--)\n");
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if (i--) goto ok10;
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return 1;
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ok10:
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puts ("t: *g_cells == 'B'\n");
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arena[0] = 'B';
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if (*g_cells == 'B') goto ok11;
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return 1;
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ok11:
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puts ("t: *x == 'B'\n");
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x = g_cells;
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if (*x == 'B') goto ok12;
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return 1;
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ok12:
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puts ("t: *x == 'R'\n");
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g_cells[0] = 'R';
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x = g_cells;
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if (*x == 'R') goto ok13;
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return 1;
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ok13:
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puts ("t: *x++ == 'C'\n");
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*x++ = c;
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if (*g_cells == 'C') goto ok14;
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return 1;
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ok14:
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puts ("t: for (i=0; i<4; ++i)\n");
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for (i=0; i<4; ++i);
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if (i != 4) return i;
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return 0;
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}
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#if __GNUC__
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void
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_start ()
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{
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// int r=main ();
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// exit (r);
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int r;
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asm (
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"mov %%ebp,%%eax\n\t"
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"addl $8,%%eax\n\t"
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"push %%eax\n\t"
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"mov %%ebp,%%eax\n\t"
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"addl $4,%%eax\n\t"
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"movzbl (%%eax),%%eax\n\t"
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"push %%eax\n\t"
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"call main\n\t"
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"movl %%eax,%0\n\t"
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: "=r" (r)
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: //no inputs "" (&main)
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);
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exit (r);
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}
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#endif
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