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cebix |
1.1 |
/* |
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* UAE - The Un*x Amiga Emulator |
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* |
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* Read 68000 CPU specs from file "table68k" and build table68k.c |
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* |
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* Copyright 1995,1996 Bernd Schmidt |
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*/ |
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#include <assert.h> |
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#include <ctype.h> |
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#include <stdio.h> |
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#include "sysdeps.h" |
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#include "readcpu.h" |
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static FILE *tablef; |
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static int nextch = 0; |
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static void getnextch(void) |
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{ |
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do { |
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nextch = fgetc(tablef); |
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if (nextch == '%') { |
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do { |
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nextch = fgetc(tablef); |
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} while (nextch != EOF && nextch != '\n'); |
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} |
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} while (nextch != EOF && isspace(nextch)); |
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} |
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static int nextchtohex(void) |
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{ |
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switch (isupper (nextch) ? tolower (nextch) : nextch) { |
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case '0': return 0; |
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case '1': return 1; |
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case '2': return 2; |
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case '3': return 3; |
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case '4': return 4; |
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case '5': return 5; |
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case '6': return 6; |
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case '7': return 7; |
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case '8': return 8; |
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case '9': return 9; |
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case 'a': return 10; |
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case 'b': return 11; |
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case 'c': return 12; |
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case 'd': return 13; |
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case 'e': return 14; |
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case 'f': return 15; |
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default: abort(); |
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} |
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} |
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int main(int argc, char **argv) |
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{ |
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int no_insns = 0; |
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printf ("#include \"sysdeps.h\"\n"); |
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printf ("#include \"readcpu.h\"\n"); |
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printf ("struct instr_def defs68k[] = {\n"); |
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#if 0 |
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tablef = fopen("table68k","r"); |
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if (tablef == NULL) { |
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fprintf(stderr, "table68k not found\n"); |
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exit(1); |
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} |
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#else |
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tablef = stdin; |
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#endif |
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getnextch(); |
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while (nextch != EOF) { |
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int cpulevel, plevel, sduse; |
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int i; |
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char patbits[16]; |
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char opcstr[256]; |
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int bitpos[16]; |
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int flagset[5], flaguse[5]; |
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unsigned int bitmask,bitpattern; |
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int n_variable; |
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n_variable = 0; |
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bitmask = bitpattern = 0; |
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memset (bitpos, 0, sizeof(bitpos)); |
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for(i=0; i<16; i++) { |
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int currbit; |
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bitmask <<= 1; |
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bitpattern <<= 1; |
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switch (nextch) { |
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case '0': currbit = bit0; bitmask |= 1; break; |
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case '1': currbit = bit1; bitmask |= 1; bitpattern |= 1; break; |
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case 'c': currbit = bitc; break; |
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case 'C': currbit = bitC; break; |
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case 'f': currbit = bitf; break; |
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case 'i': currbit = biti; break; |
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case 'I': currbit = bitI; break; |
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case 'j': currbit = bitj; break; |
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case 'J': currbit = bitJ; break; |
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case 'k': currbit = bitk; break; |
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case 'K': currbit = bitK; break; |
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case 's': currbit = bits; break; |
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case 'S': currbit = bitS; break; |
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case 'd': currbit = bitd; break; |
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case 'D': currbit = bitD; break; |
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case 'r': currbit = bitr; break; |
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case 'R': currbit = bitR; break; |
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case 'z': currbit = bitz; break; |
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default: abort(); |
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} |
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if (!(bitmask & 1)) { |
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bitpos[n_variable] = currbit; |
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n_variable++; |
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} |
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if (nextch == '0' || nextch == '1') |
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bitmask |= 1; |
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if (nextch == '1') |
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bitpattern |= 1; |
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patbits[i] = nextch; |
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getnextch(); |
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} |
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while (isspace(nextch) || nextch == ':') /* Get CPU and privilege level */ |
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getnextch(); |
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switch (nextch) { |
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case '0': cpulevel = 0; break; |
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case '1': cpulevel = 1; break; |
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case '2': cpulevel = 2; break; |
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case '3': cpulevel = 3; break; |
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case '4': cpulevel = 4; break; |
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default: abort(); |
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} |
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getnextch(); |
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switch (nextch) { |
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case '0': plevel = 0; break; |
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case '1': plevel = 1; break; |
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case '2': plevel = 2; break; |
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case '3': plevel = 3; break; |
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default: abort(); |
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} |
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getnextch(); |
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while (isspace(nextch)) /* Get flag set information */ |
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getnextch(); |
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if (nextch != ':') |
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abort(); |
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for(i = 0; i < 5; i++) { |
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getnextch(); |
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switch(nextch){ |
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case '-': flagset[i] = fa_unset; break; |
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case '/': flagset[i] = fa_isjmp; break; |
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case '0': flagset[i] = fa_zero; break; |
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case '1': flagset[i] = fa_one; break; |
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case 'x': flagset[i] = fa_dontcare; break; |
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case '?': flagset[i] = fa_unknown; break; |
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default: flagset[i] = fa_set; break; |
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} |
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} |
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getnextch(); |
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while (isspace(nextch)) |
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getnextch(); |
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if (nextch != ':') /* Get flag used information */ |
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abort(); |
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for(i = 0; i < 5; i++) { |
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getnextch(); |
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switch(nextch){ |
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case '-': flaguse[i] = fu_unused; break; |
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case '/': flaguse[i] = fu_isjmp; break; |
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case '+': flaguse[i] = fu_maybecc; break; |
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case '?': flaguse[i] = fu_unknown; break; |
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default: flaguse[i] = fu_used; break; |
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} |
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} |
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getnextch(); |
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while (isspace(nextch)) |
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getnextch(); |
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if (nextch != ':') /* Get source/dest usage information */ |
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abort(); |
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getnextch(); |
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sduse = nextchtohex() << 4; |
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getnextch(); |
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sduse |= nextchtohex(); |
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getnextch(); |
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while (isspace(nextch)) |
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getnextch(); |
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if (nextch != ':') |
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abort(); |
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fgets(opcstr, 250, tablef); |
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getnextch(); |
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{ |
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int j; |
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/* Remove superfluous spaces from the string */ |
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char *opstrp = opcstr, *osendp; |
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int slen = 0; |
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while (isspace(*opstrp)) |
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opstrp++; |
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osendp = opstrp; |
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while (*osendp) { |
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if (!isspace (*osendp)) |
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slen = osendp - opstrp + 1; |
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osendp++; |
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} |
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opstrp[slen] = 0; |
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if (no_insns > 0) |
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printf(",\n"); |
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no_insns++; |
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printf("{ %d, %d, {", bitpattern, n_variable); |
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for (j = 0; j < 16; j++) { |
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printf("%d", bitpos[j]); |
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if (j < 15) |
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printf(","); |
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} |
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printf ("}, %d, %d, %d, { ", bitmask, cpulevel, plevel); |
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for(i = 0; i < 5; i++) { |
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printf("{ %d, %d }%c ", flaguse[i], flagset[i], i == 4 ? ' ' : ','); |
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} |
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printf("}, %d, \"%s\"}", sduse, opstrp); |
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} |
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} |
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printf("};\nint n_defs68k = %d;\n", no_insns); |
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fclose(tablef); |
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return 0; |
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} |
