/*      $OpenBSD: divremtest.c,v 1.2 2001/01/29 02:05:39 niklas Exp $   */
/*      $NetBSD: divremtest.c,v 1.1 1995/04/24 05:53:35 cgd Exp $       */

/*
 * Copyright (c) 1995 Christopher G. Demetriou
 * 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 Christopher G. Demetriou
 *      for the NetBSD Project.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 */

#include <stdio.h>
#include <unistd.h>
#include <signal.h>

void    testfile();
void    usage();

int generate;

int
main(argc, argv)
        int argc;
        char **argv;
{
        int c;

        signal(SIGFPE, SIG_IGN);

        while ((c = getopt(argc, argv, "g")) != -1)
                switch (c) {
                case 'g':
                        generate = 1;
                        break;

                default:
                        usage();
                        break;
        }

        argc -= optind;
        argv += optind;

        if (argc == 0)
                testfile();
        else
                for (; argc != 0; argc--, argv++) {
                        if (freopen(argv[0], "r", stdin) == NULL) {
                                fprintf(stderr,
                                    "divremtest: couldn't open %s\n",
                                    argv[0]);
                                exit(1);
                        }

                        testfile();
                }

        exit(0);
}

void
testfile()
{
        union operand {
                unsigned long   input;
                int             op_int;
                unsigned int    op_u_int;
                long            op_long;
                unsigned long   op_u_long;
        } op1, op2, divres, modres, divwant, modwant;
        char opspec[6];
        int encoded, i;

        while (scanf("%6c %lx %lx %lx %lx\n", opspec, &op1.input,
            &op2.input, &divwant.input, &modwant.input) != EOF) {

                encoded = 0;

                for (i = 0; i < 6; i += 2) {
                        int posval;

                        switch (opspec[i]) {
                        case '.':
                                posval = 0;
                                break;
                        case '-':
                                posval = 1;
                                break;
                        default:
                                fprintf(stderr,
                                    "unknown signedness spec %c\n",
                                    opspec[i]);
                                exit(1);
                        }
                        encoded |= posval << ((5 - i) * 4);
                }
                        
                for (i = 1; i < 6; i += 2) {
                        int posval;

                        switch (opspec[i]) {
                        case 'i':
                                posval = 0;
                                break;
                        case 'l':
                                posval = 1;
                                break;
                        default:
                                fprintf(stderr, "unknown length spec %c\n",
                                    opspec[i]);
                                exit(1);
                        }
                        encoded |= posval << ((5 - i) * 4);
                }

                /* KILL ME!!! */
                switch (encoded) {

#define TRY_IT(a, b, c)                                                 \
        divres.a = op1.b / op2.c;                                       \
        modres.a = op1.b % op2.c;                                       \
        if (generate) {                                                 \
                printf("%6s 0x%016lx 0x%016lx 0x%016lx 0x%016lx\n",     \
                    opspec, op1.input, op2.input,                       \
                    divres.a, modres.a);                                \
        } else {                                                        \
                if ((divres.a != divwant.a) ||                          \
                    (modres.a != modwant.a)) {                          \
                        fprintf(stderr, "%6s 0x%016lx 0x%016lx\n",      \
                            opspec, op1.input, op2.input);              \
                        fprintf(stderr, "FAILED:\n");                   \
                        fprintf(stderr,                                 \
                            "div:\twanted 0x%16lx, got 0x%16lx\n",      \
                            divwant.a, divres.a);                       \
                        fprintf(stderr,                                 \
                            "mod:\twanted 0x%16lx, got 0x%16lx\n",      \
                            modwant.a, modres.a);                       \
                                                                        \
                        exit(1);                                        \
                }                                                       \
        }

#include "cases.c"

#undef TRY_IT

                default:
                        fprintf(stderr,
                            "INTERNAL ERROR: unknown encoding %x\n", encoded);
                        exit(1);
                }
        }
}

void
usage()
{

        fprintf(stderr, "usage: divremtest [-v] [testfile ...]\n");
        exit(1);
}