Logo Search packages:      
Sourcecode: hatari version File versions  Download package

build68k.c

/*
 * UAE - The Un*x Amiga Emulator - CPU core
 *
 * Read 68000 CPU specs from file "table68k" and build table68k.c
 *
 * Copyright 1995,1996 Bernd Schmidt
 *
 * Adaptation to Hatari by Thomas Huth
 *
 * This file is distributed under the GNU Public License, version 2 or at
 * your option any later version. Read the file gpl.txt for details.
 */
char Build68k_rcsid[] = "Hatari $Id: build68k.c,v 1.4 2004/04/19 08:53:49 thothy Exp $";

#include <assert.h>
#include <ctype.h>
#include <string.h>

#include "readcpu.h"


static FILE *tablef;
static int nextch = 0;


static void getnextch(void)
{
    do {
      nextch = fgetc(tablef);
      if (nextch == '%') {
          do {
            nextch = fgetc(tablef);
          } while (nextch != EOF && nextch != '\n');
      }
    } while (nextch != EOF && isspace(nextch));
}

static int nextchtohex(void)
{
    switch (isupper (nextch) ? tolower (nextch) : nextch) {
     case '0': return 0;
     case '1': return 1;
     case '2': return 2;
     case '3': return 3;
     case '4': return 4;
     case '5': return 5;
     case '6': return 6;
     case '7': return 7;
     case '8': return 8;
     case '9': return 9;
     case 'a': return 10;
     case 'b': return 11;
     case 'c': return 12;
     case 'd': return 13;
     case 'e': return 14;
     case 'f': return 15;
     default: abort();
    }
}

int main(int argc, char **argv)
{
    int no_insns = 0;

    /*printf ("#include \"sysconfig.h\"\n");*/
    printf ("#include \"sysdeps.h\"\n");
    printf ("#include \"readcpu.h\"\n");
    printf ("struct instr_def defs68k[] = {\n");
#if 0
    tablef = fopen("table68k","r");
    if (tablef == NULL) {
      fprintf(stderr, "table68k not found\n");
      exit(1);
    }
#else
    tablef = stdin;
#endif
    getnextch();
    while (nextch != EOF) {
      int cpulevel, plevel, sduse;
      int i;

      char patbits[16];
      char opcstr[256];
      int bitpos[16];
      int flagset[5], flaguse[5];

      unsigned int bitmask,bitpattern;
      int n_variable;

      n_variable = 0;
      bitmask = bitpattern = 0;
      memset (bitpos, 0, sizeof(bitpos));
      for(i=0; i<16; i++) {
          int currbit;
          bitmask <<= 1;
          bitpattern <<= 1;

          switch (nextch) {
           case '0': currbit = bit0; bitmask |= 1; break;
           case '1': currbit = bit1; bitmask |= 1; bitpattern |= 1; break;
           case 'c': currbit = bitc; break;
           case 'C': currbit = bitC; break;
           case 'f': currbit = bitf; break;
           case 'i': currbit = biti; break;
           case 'I': currbit = bitI; break;
           case 'j': currbit = bitj; break;
           case 'J': currbit = bitJ; break;
           case 'k': currbit = bitk; break;
           case 'K': currbit = bitK; break;
           case 's': currbit = bits; break;
           case 'S': currbit = bitS; break;
           case 'd': currbit = bitd; break;
           case 'D': currbit = bitD; break;
           case 'r': currbit = bitr; break;
           case 'R': currbit = bitR; break;
           case 'z': currbit = bitz; break;
           case 'p': currbit = bitp; break;
           default: abort();
          }
          if (!(bitmask & 1)) {
            bitpos[n_variable] = currbit;
            n_variable++;
          }

          if (nextch == '0' || nextch == '1')
            bitmask |= 1;
          if (nextch == '1')
            bitpattern |= 1;
          patbits[i] = nextch;
          getnextch();
      }

      while (isspace(nextch) || nextch == ':') /* Get CPU and privilege level */
          getnextch();

      switch (nextch) {
       case '0': cpulevel = 0; break;
       case '1': cpulevel = 1; break;
       case '2': cpulevel = 2; break;
       case '3': cpulevel = 3; break;
       case '4': cpulevel = 4; break;
       default: abort();
      }
      getnextch();

      switch (nextch) {
       case '0': plevel = 0; break;
       case '1': plevel = 1; break;
       case '2': plevel = 2; break;
       case '3': plevel = 3; break;
       default: abort();
      }
      getnextch();

      while (isspace(nextch))                   /* Get flag set information */
          getnextch();

      if (nextch != ':')
          abort();

      for(i = 0; i < 5; i++) {
          getnextch();
          switch(nextch){
           case '-': flagset[i] = fa_unset; break;
           case '/': flagset[i] = fa_isjmp; break;
           case '+': flagset[i] = fa_isbranch; break;
           case '0': flagset[i] = fa_zero; break;
           case '1': flagset[i] = fa_one; break;
           case 'x': flagset[i] = fa_dontcare; break;
           case '?': flagset[i] = fa_unknown; break;
           default: flagset[i] = fa_set; break;
          }
      }

      getnextch();
      while (isspace(nextch))
          getnextch();

      if (nextch != ':')                        /* Get flag used information */
          abort();

      for(i = 0; i < 5; i++) {
          getnextch();
          switch(nextch){
           case '-': flaguse[i] = fu_unused; break;
           case '/': flaguse[i] = fu_isjmp; break;
           case '+': flaguse[i] = fu_maybecc; break;
           case '?': flaguse[i] = fu_unknown; break;
           default: flaguse[i] = fu_used; break;
          }
      }

      getnextch();
      while (isspace(nextch))
          getnextch();

      if (nextch != ':')                        /* Get source/dest usage information */
          abort();

      getnextch();
      sduse = nextchtohex() << 4;
      getnextch();
      sduse |= nextchtohex();

      getnextch();
      while (isspace(nextch))
          getnextch();

      if (nextch != ':')
          abort();

      fgets(opcstr, 250, tablef);
      getnextch();
      {
          int j;
          /* Remove superfluous spaces from the string */
          char *opstrp = opcstr, *osendp;
          int slen = 0;

          while (isspace(*opstrp))
            opstrp++;

          osendp = opstrp;
          while (*osendp) {
            if (!isspace (*osendp))
                slen = osendp - opstrp + 1;
            osendp++;
          }
          opstrp[slen] = 0;

          if (no_insns > 0)
            printf(",\n");
          no_insns++;
          printf("{ %d, %d, {", bitpattern, n_variable);
          for (j = 0; j < 16; j++) {
            printf("%d", bitpos[j]);
            if (j < 15)
                printf(",");
          }
          printf ("}, %d, %d, %d, { ", bitmask, cpulevel, plevel);
          for(i = 0; i < 5; i++) {
            printf("{ %d, %d }%c ", flaguse[i], flagset[i], i == 4 ? ' ' : ',');
          }
          printf("}, %d, \"%s\"}", sduse, opstrp);
      }
    }
    printf("};\nint n_defs68k = %d;\n", no_insns);
    return 0;
}

Generated by  Doxygen 1.6.0   Back to index