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AmigActive 6
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AACD06.ISO
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AACD
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Emulation
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BasiliskII
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src
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uae_cpu
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build68k.c
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C/C++ Source or Header
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1999-11-03
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6KB
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242 lines
/*
* UAE - The Un*x Amiga Emulator
*
* Read 68000 CPU specs from file "table68k" and build table68k.c
*
* Copyright 1995,1996 Bernd Schmidt
*/
#include <assert.h>
#include <ctype.h>
#include <stdio.h>
#include "sysdeps.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 \"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;
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;
case '5': cpulevel = 5; 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 '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;
}