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gencpu.c
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C/C++ Source or Header
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1996-05-26
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65KB
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1,903 lines
/*
* UAE - The Un*x Amiga Emulator
*
* MC68000 emulation generator
*
* This is a fairly stupid program that generates a lot of case labels that
* can be #included in a switch statement.
* As an alternative, it can generate functions that handle specific
* MC68000 instructions, plus a prototype header file and a function pointer
* array to look up the function for an opcode.
* Error checking is bad, an illegal table68k file will cause the program to
* call abort().
* The generated code is sometimes sub-optimal, an optimizing compiler should
* take care of this.
*
* (c) 1995 Bernd Schmidt
*
*/
#include "sysconfig.h"
#include "sysdeps.h"
#include <ctype.h>
#include "config.h"
#include "options.h"
#include "readcpu.h"
#define BOOL_TYPE "int"
long int counts[65536];
static int isspecific(int opcode)
{
return counts[opcode]>5;
}
static void read_counts(void)
{
FILE *file;
unsigned long opcode,count, total;
int trapcount=0;
int trap=0;
memset(counts, 0, sizeof counts);
file=fopen("insncount","r");
if(file)
{
fscanf(file,"Total: %d",&total);
while(fscanf(file,"%x: %d\n",&opcode,&count)==2)
{
counts[opcode]=10000.0*count/total;
if(isspecific(opcode))
{
trapcount+=count;
trap++;
}
}
#if 0
fprintf(stderr,"trap %d function: %f%\n",trap,100.0*trapcount/total);
#endif
}
}
static int n_braces = 0;
static void start_brace(void)
{
n_braces++;
printf("{");
}
static void close_brace(void)
{
assert (n_braces > 0);
n_braces--;
printf("}");
}
static void finish_braces(void)
{
while (n_braces > 0)
close_brace();
}
static void pop_braces(int to)
{
while (n_braces > to)
close_brace();
}
static void genamode(amodes mode, char *reg, wordsizes size, char *name, int getv, int movem)
{
start_brace ();
switch(mode) {
case Dreg:
if (movem)
abort();
if (getv)
switch(size) {
case sz_byte:
printf("\tBYTE %s = regs.d[%s];\n", name, reg);
break;
case sz_word:
printf("\tWORD %s = regs.d[%s];\n", name, reg);
break;
case sz_long:
printf("\tLONG %s = regs.d[%s];\n", name, reg);
break;
default: abort();
}
break;
case Areg:
if (movem)
abort();
if (getv)
switch(size) {
case sz_word:
printf("\tWORD %s = regs.a[%s];\n", name, reg);
break;
case sz_long:
printf("\tLONG %s = regs.a[%s];\n", name, reg);
break;
default: abort();
}
break;
case Aind:
printf("\tCPTR %sa = regs.a[%s];\n", name, reg);
if (getv)
switch(size) {
case sz_byte:
printf("\tBYTE %s = get_byte(%sa);\n", name, name);
break;
case sz_word:
printf("\tWORD %s = get_word(%sa);\n", name, name);
break;
case sz_long:
printf("\tLONG %s = get_long(%sa);\n", name, name);
break;
default: abort();
}
break;
case Aipi:
printf("\tCPTR %sa = regs.a[%s];\n", name, reg);
switch(size) {
case sz_byte:
if (getv) printf("\tBYTE %s = get_byte(%sa);\n", name, name);
if (!movem) {
start_brace();
printf("\tregs.a[%s] += areg_byteinc[%s];\n", reg, reg);
}
break;
case sz_word:
if (getv) printf("\tWORD %s = get_word(%sa);\n", name, name);
if (!movem) {
start_brace();
printf("\tregs.a[%s] += 2;\n", reg);
}
break;
case sz_long:
if (getv) printf("\tLONG %s = get_long(%sa);\n", name, name);
if (!movem) {
start_brace();
printf("\tregs.a[%s] += 4;\n", reg);
}
break;
default: abort();
}
break;
case Apdi:
switch(size) {
case sz_byte:
if (!movem) printf("\tregs.a[%s] -= areg_byteinc[%s];\n", reg, reg);
start_brace();
printf("\tCPTR %sa = regs.a[%s];\n", name, reg);
if (getv) printf("\tBYTE %s = get_byte(%sa);\n", name, name);
break;
case sz_word:
if (!movem) printf("\tregs.a[%s] -= 2;\n", reg);
start_brace();
printf("\tCPTR %sa = regs.a[%s];\n", name, reg);
if (getv) printf("\tWORD %s = get_word(%sa);\n", name, name);
break;
case sz_long:
if (!movem) printf("\tregs.a[%s] -= 4;\n", reg);
start_brace();
printf("\tCPTR %sa = regs.a[%s];\n", name, reg);
if (getv) printf("\tLONG %s = get_long(%sa);\n", name, name);
break;
default: abort();
}
break;
case Ad16:
printf("\tCPTR %sa = regs.a[%s] + (LONG)(WORD)nextiword();\n", name, reg);
if (getv)
switch(size) {
case sz_byte:
printf("\tBYTE %s = get_byte(%sa);\n", name, name);
break;
case sz_word:
printf("\tWORD %s = get_word(%sa);\n", name, name);
break;
case sz_long:
printf("\tLONG %s = get_long(%sa);\n", name, name);
break;
default: abort();
}
break;
case Ad8r:
printf("\tCPTR %sa = regs.a[%s];\n", name, reg);
#if 0
printf("\tUWORD %sdp = nextiword();\n", name);
printf("\t%sa += (LONG)(BYTE)(%sdp & 0xFF);\n", name, name);
start_brace();
printf("\tULONG %sdpr = %sdp & 0x8000 ? regs.a[(%sdp & 0x7000) >> 12] : regs.d[(%sdp & 0x7000) >> 12];\n", name, name, name, name);
printf("\tif (!(%sdp & 0x800)) %sdpr = (LONG)(WORD)%sdpr;\n", name, name, name);
printf("\t%sa += %sdpr;\n", name, name);
#endif
printf("\t%sa = get_disp_ea (%sa, nextiword());\n", name, name);
if (getv) {
start_brace();
switch(size) {
case sz_byte:
printf("\tBYTE %s = get_byte(%sa);\n", name, name);
break;
case sz_word:
printf("\tWORD %s = get_word(%sa);\n", name, name);
break;
case sz_long:
printf("\tLONG %s = get_long(%sa);\n", name, name);
break;
default: abort();
}
}
break;
case PC16:
printf("\tCPTR %sa = m68k_getpc();\n", name);
printf("\t%sa += (LONG)(WORD)nextiword();\n", name);
if (getv) {
start_brace();
switch(size) {
case sz_byte:
printf("\tBYTE %s = get_byte(%sa);\n", name, name);
break;
case sz_word:
printf("\tWORD %s = get_word(%sa);\n", name, name);
break;
case sz_long:
printf("\tLONG %s = get_long(%sa);\n", name, name);
break;
default: abort();
}
}
break;
case PC8r:
printf("\tCPTR %sa = m68k_getpc();\n", name);
#if 0
printf("\tUWORD %sdp = nextiword();\n", name);
printf("\t%sa += (LONG)(BYTE)(%sdp & 0xFF);\n", name, name);
start_brace();
printf("\tULONG %sdpr = %sdp & 0x8000 ? regs.a[(%sdp & 0x7000) >> 12] : regs.d[(%sdp & 0x7000) >> 12];\n", name, name, name, name);
printf("\tif (!(%sdp & 0x800)) %sdpr = (LONG)(WORD)%sdpr;\n", name, name, name);
printf("\t%sa += %sdpr;\n", name, name);
#endif
printf("\t%sa = get_disp_ea (%sa, nextiword());\n", name, name);
if (getv) {
start_brace();
switch(size) {
case sz_byte:
printf("\tBYTE %s = get_byte(%sa);\n", name, name);
break;
case sz_word:
printf("\tWORD %s = get_word(%sa);\n", name, name);
break;
case sz_long:
printf("\tLONG %s = get_long(%sa);\n", name, name);
break;
default: abort();
}
}
break;
case absw:
printf("\tCPTR %sa = (LONG)(WORD)nextiword();\n", name);
if (getv)
switch(size) {
case sz_byte:
printf("\tBYTE %s = get_byte(%sa);\n", name, name);
break;
case sz_word:
printf("\tWORD %s = get_word(%sa);\n", name, name);
break;
case sz_long:
printf("\tLONG %s = get_long(%sa);\n", name, name);
break;
default: abort();
}
break;
case absl:
printf("\tCPTR %sa = nextilong();\n", name);
if (getv)
switch(size) {
case sz_byte:
printf("\tBYTE %s = get_byte(%sa);\n", name, name);
break;
case sz_word:
printf("\tWORD %s = get_word(%sa);\n", name, name);
break;
case sz_long:
printf("\tLONG %s = get_long(%sa);\n", name, name);
break;
default: abort();
}
break;
case imm:
if (getv)
switch(size) {
case sz_byte:
printf("\tBYTE %s = nextiword();\n", name);
break;
case sz_word:
printf("\tWORD %s = nextiword();\n", name);
break;
case sz_long:
printf("\tLONG %s = nextilong();\n", name);
break;
default: abort();
}
break;
case imm0:
if (!getv) abort();
printf("\tBYTE %s = nextiword();\n", name);
break;
case imm1:
if (!getv) abort();
printf("\tWORD %s = nextiword();\n", name);
break;
case imm2:
if (!getv) abort();
printf("\tLONG %s = nextilong();\n", name);
break;
case immi:
if (!getv) abort();
printf("\tULONG %s = %s;\n", name, reg);
break;
default:
abort();
}
}
static void genastore(char *from, amodes mode, char *reg, wordsizes size, char *to)
{
switch(mode) {
case Dreg:
switch(size) {
case sz_byte:
printf("\tregs.d[%s] &= ~0xff; regs.d[%s] |= (%s) & 0xff;\n", reg, reg, from);
break;
case sz_word:
printf("\tregs.d[%s] &= ~0xffff; regs.d[%s] |= (%s) & 0xffff;\n", reg, reg, from);
break;
case sz_long:
printf("\tregs.d[%s] = (%s);\n", reg, from);
break;
default: abort();
}
break;
case Areg:
switch(size) {
case sz_word:
printf("\tregs.a[%s] = (LONG)(WORD)(%s);\n", reg, from);
break;
case sz_long:
printf("\tregs.a[%s] = (%s);\n", reg, from);
break;
default: abort();
}
break;
case Aind:
case Aipi:
case Apdi:
case Ad16:
case Ad8r:
case absw:
case absl:
switch(size) {
case sz_byte:
printf("\tput_byte(%sa,%s);\n", to, from);
break;
case sz_word:
printf("\tput_word(%sa,%s);\n", to, from);
break;
case sz_long:
printf("\tput_long(%sa,%s);\n", to, from);
break;
default: abort();
}
break;
case PC16:
case PC8r:
switch(size) {
case sz_byte:
printf("\tput_byte(%sa,%s);\n", to, from);
break;
case sz_word:
if (CPU_LEVEL < 2)
abort();
printf("\tput_word(%sa,%s);\n", to, from);
break;
case sz_long:
if (CPU_LEVEL < 2)
abort();
printf("\tput_long(%sa,%s);\n", to, from);
break;
default: abort();
}
break;
case imm:
case imm0:
case imm1:
case imm2:
case immi:
abort();
break;
default:
abort();
}
}
static void genmovemel(UWORD opcode)
{
char getcode[100];
int size = table68k[opcode].size == sz_long ? 4 : 2;
if (table68k[opcode].size == sz_long) {
strcpy(getcode, "get_long(srca)");
} else {
strcpy(getcode, "(LONG)(WORD)get_word(srca)");
}
printf("\tUWORD mask = nextiword(), bitmask = mask;\n");
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 0, 1);
start_brace();
printf("\tint i, bitcnt = 0;\n");
printf("\tfor(i=0;i<16;i++) { bitcnt += bitmask & 1; bitmask >>= 1; }\n");
printf("\tfor(i=0;i<8;i++) { if (mask & 1) { regs.d[i] = %s; srca += %d; } mask >>= 1; }\n", getcode, size);
printf("\tfor(i=0;i<8;i++) { if (mask & 1) { regs.a[i] = %s; srca += %d; } mask >>= 1; }\n", getcode, size);
if (table68k[opcode].smode == Aipi)
printf("\tregs.a[srcreg] = srca;\n");
}
static void genmovemle(UWORD opcode)
{
char putcode[100], shiftcode[] = ">>";
int size = table68k[opcode].size == sz_long ? 4 : 2;
int mask = 1;
if (table68k[opcode].size == sz_long) {
strcpy(putcode, "put_long(srca,");
} else {
strcpy(putcode, "put_word(srca,");
}
printf("\tUWORD mask = nextiword(), bitmask = mask;\n");
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 0, 1);
start_brace();
printf("\tint i, bitcnt = 0;\n");
printf("\tULONG rd[8], ra[8];\n");
printf("\tfor(i=0;i<16;i++) { bitcnt += bitmask & 1; bitmask >>= 1; }\n");
printf("\tfor(i=0;i<8;i++) { rd[i] = regs.d[i]; ra[i] = regs.a[i]; }\n");
if (table68k[opcode].smode == Apdi) {
printf("\tsrca -= %d*bitcnt;\n", size);
printf("\tregs.a[srcreg] = srca;\n");
strcpy(shiftcode, "<<");
mask = 0x8000;
}
printf("\tfor(i=0;i<8;i++) { if (mask & %d) { %s rd[i]); srca += %d; } mask %s= 1; }\n",
mask, putcode, size, shiftcode);
printf("\tfor(i=0;i<8;i++) { if (mask & %d) { %s ra[i]); srca += %d; } mask %s= 1; }\n",
mask, putcode, size, shiftcode);
}
typedef enum {
flag_logical, flag_add, flag_sub, flag_cmp, flag_addx, flag_subx, flag_zn,
flag_av, flag_sv
} flagtypes;
static void genflags_normal(flagtypes type, wordsizes size, char *value, char *src, char *dst)
{
char vstr[100],sstr[100],dstr[100];
char usstr[100],udstr[100];
char unsstr[100],undstr[100];
switch(size) {
case sz_byte:
strcpy(vstr, "((BYTE)(");
strcpy(usstr, "((UBYTE)(");
break;
case sz_word:
strcpy(vstr, "((WORD)(");
strcpy(usstr, "((UWORD)(");
break;
case sz_long:
strcpy(vstr, "((LONG)(");
strcpy(usstr, "((ULONG)(");
break;
default:
abort();
}
strcpy(unsstr, usstr);
strcpy(sstr, vstr);
strcpy(dstr, vstr);
strcat(vstr, value); strcat(vstr,"))");
strcat(dstr, dst); strcat(dstr,"))");
strcat(sstr, src); strcat(sstr,"))");
strcpy(udstr, usstr);
strcat(udstr, dst); strcat(udstr,"))");
strcat(usstr, src); strcat(usstr,"))");
strcpy(undstr, unsstr);
strcat(unsstr, "-");
strcat(undstr, "~");
strcat(undstr, dst); strcat(undstr,"))");
strcat(unsstr, src); strcat(unsstr,"))");
switch (type) {
case flag_logical:
case flag_zn:
case flag_av:
case flag_sv:
case flag_addx:
case flag_subx:
break;
case flag_add:
start_brace();
printf("ULONG %s = %s + %s;\n", value, dstr, sstr);
break;
case flag_sub:
case flag_cmp:
start_brace();
printf("ULONG %s = %s - %s;\n", value, dstr, sstr);
break;
}
switch (type) {
case flag_logical:
case flag_zn:
break;
case flag_add:
case flag_sub:
case flag_addx:
case flag_subx:
case flag_cmp:
case flag_av:
case flag_sv:
start_brace();
printf("\t"BOOL_TYPE" flgs = %s < 0;\n", sstr);
printf("\t"BOOL_TYPE" flgo = %s < 0;\n", dstr);
printf("\t"BOOL_TYPE" flgn = %s < 0;\n", vstr);
break;
}
switch(type) {
case flag_logical:
printf("\tVFLG = CFLG = 0;\n");
printf("\tZFLG = %s == 0;\n", vstr);
printf("\tNFLG = %s < 0;\n", vstr);
break;
case flag_av:
printf("\tVFLG = (flgs == flgo) && (flgn != flgo);\n");
break;
case flag_sv:
printf("\tVFLG = (flgs != flgo) && (flgn != flgo);\n");
break;
case flag_zn:
printf("\tif (%s != 0) ZFLG = 0;\n", vstr);
printf("\tNFLG = %s < 0;\n", vstr);
break;
case flag_add:
printf("\tZFLG = %s == 0;\n", vstr);
printf("\tVFLG = (flgs == flgo) && (flgn != flgo);\n");
printf("\tCFLG = regs.x = %s < %s;\n", undstr, usstr);
printf("\tNFLG = flgn != 0;\n");
break;
case flag_sub:
printf("\tZFLG = %s == 0;\n", vstr);
printf("\tVFLG = (flgs != flgo) && (flgn != flgo);\n");
printf("\tCFLG = regs.x = %s > %s;\n", usstr, udstr);
printf("\tNFLG = flgn != 0;\n");
break;
case flag_addx:
printf("\tVFLG = (flgs && flgo && !flgn) || (!flgs && !flgo && flgn);\n");
printf("\tregs.x = CFLG = (flgs && flgo) || (!flgn && (flgo || flgs));\n");
break;
case flag_subx:
printf("\tVFLG = (!flgs && flgo && !flgn) || (flgs && !flgo && flgn);\n");
printf("\tregs.x = CFLG = (flgs && !flgo) || (flgn && (!flgo || flgs));\n");
break;
case flag_cmp:
printf("\tZFLG = %s == 0;\n", vstr);
printf("\tVFLG = (flgs != flgo) && (flgn != flgo);\n");
printf("\tCFLG = %s > %s;\n", usstr, udstr);
printf("\tNFLG = flgn != 0;\n");
break;
}
}
static void genflags(flagtypes type, wordsizes size, char *value, char *src, char *dst)
{
#ifdef INTEL_FLAG_OPT
switch (type) {
case flag_logical:
case flag_av:
case flag_sv:
case flag_zn:
case flag_addx:
case flag_subx:
break;
case flag_add:
case flag_sub:
case flag_cmp:
start_brace();
printf("\tULONG %s;\n", value);
break;
}
switch(type) {
case flag_av:
case flag_sv:
case flag_zn:
case flag_addx:
case flag_subx:
break;
case flag_logical:
if (strcmp(value, "0") == 0) {
/* GCC doesn't want to load the constant into a register.
* intel_flag_lookup[64] is just the zero flag set. */
printf("\tregflags = intel_flag_lookup[64];\n");
} else {
switch(size) {
case sz_byte:
printf("\t__asm__(\"testb %%0,%%0; lahf; movzbl %%%%ah,%%%%eax; movl intel_flag_lookup(,%%%%eax,4),%%%%eax; movl %%%%eax,regflags\""
": : \"r\" (%s) : \"%%eax\", \"cc\");", value);
break;
case sz_word:
printf("\t__asm__(\"testw %%0,%%0; lahf; movzbl %%%%ah,%%%%eax; movl intel_flag_lookup(,%%%%eax,4),%%%%eax; movl %%%%eax,regflags\""
": : \"r\" (%s) : \"%%eax\", \"cc\");", value);
break;
case sz_long:
printf("\t__asm__(\"testl %%0,%%0; lahf; movzbl %%%%ah,%%%%eax; movl intel_flag_lookup(,%%%%eax,4),%%%%eax; movl %%%%eax,regflags\""
": : \"r\" (%s) : \"%%eax\", \"cc\");", value);
break;
case sz_unknown:
abort();
}
}
return;
case flag_add:
/* Of course it would be better to let GCC find a proper register to
* compute newv in, but it does not seem to like reloading the 8 bit
* regs. */
switch (size) {
case sz_byte:
printf("\t__asm__(\"addb %%b3,%%b0; lahf; movzbl %%%%ah,%%%%eax;"
" movl intel_flag_lookup(,%%%%eax,4),%%%%eax; seto %%%%al; movb %%%%ah,%%1; movl %%%%eax,regflags \""
": \"=&q\" (%s), \"=m\" (regs.x) "
": \"0\" ((BYTE)(%s)), \"qm\" ((BYTE)(%s)) : \"cc\", \"%%eax\");",
value, src, dst);
break;
case sz_word:
printf("\t__asm__(\"addw %%w3,%%w0; lahf; movzbl %%%%ah,%%%%eax;"
" movl intel_flag_lookup(,%%%%eax,4),%%%%eax; seto %%%%al; movb %%%%ah,%%1; movl %%%%eax,regflags \""
": \"=&r\" (%s), \"=m\" (regs.x) "
": \"0\" ((WORD)(%s)), \"rmi\" ((WORD)(%s)) : \"cc\", \"%%eax\");",
value, src, dst);
break;
case sz_long:
printf("\t__asm__(\"addl %%3,%%0; lahf; movzbl %%%%ah,%%%%eax;"
" movl intel_flag_lookup(,%%%%eax,4),%%%%eax; seto %%%%al; movb %%%%ah,%%1; movl %%%%eax,regflags \""
": \"=&r\" (%s), \"=m\" (regs.x) "
": \"0\" ((LONG)(%s)), \"rmi\" ((LONG)(%s)) : \"cc\", \"%%eax\");",
value, src, dst);
break;
case sz_unknown:
abort();
}
return;
case flag_sub:
switch (size) {
case sz_byte:
printf("\t__asm__(\"subb %%b2,%%b0; lahf; movzbl %%%%ah,%%%%eax;"
" movl intel_flag_lookup(,%%%%eax,4),%%%%eax; seto %%%%al; movb %%%%ah,%%1; movl %%%%eax,regflags \""
": \"=&q\" (%s), \"=m\" (regs.x) "
": \"qmi\" ((BYTE)(%s)), \"0\" ((BYTE)(%s)) : \"cc\", \"%%eax\");",
value, src, dst);
break;
case sz_word:
printf("\t__asm__(\"subw %%w2,%%w0; lahf; movzbl %%%%ah,%%%%eax;"
" movl intel_flag_lookup(,%%%%eax,4),%%%%eax; seto %%%%al; movb %%%%ah,%%1; movl %%%%eax,regflags \""
": \"=&r\" (%s), \"=m\" (regs.x) "
": \"rmi\" ((WORD)(%s)), \"0\" ((WORD)(%s)) : \"cc\", \"%%eax\");",
value, src, dst);
break;
case sz_long:
printf("\t__asm__(\"subl %%2,%%0; lahf; movzbl %%%%ah,%%%%eax;"
" movl intel_flag_lookup(,%%%%eax,4),%%%%eax; seto %%%%al; movb %%%%ah,%%1; movl %%%%eax,regflags \""
": \"=&r\" (%s), \"=m\" (regs.x) "
": \"rmi\" ((LONG)(%s)), \"0\" ((LONG)(%s)) : \"cc\", \"%%eax\");",
value, src, dst);
break;
case sz_unknown:
abort();
}
return;
case flag_cmp:
switch (size) {
case sz_byte:
printf("\t__asm__(\"movb %%3,%%%%cl; subb %%2,%%%%cl; lahf; movzbl %%%%ah,%%%%eax;"
" movl intel_flag_lookup(,%%%%eax,4),%%%%eax; seto %%%%al \""
": \"=a\" (regflags.longflags), \"=&c\" (%s) "
": \"rm\" ((BYTE)(%s)), \"rmi\" ((BYTE)(%s)) : \"cc\");",
value, src, dst);
break;
case sz_word:
printf("\t__asm__(\"movw %%3,%%%%cx; subw %%2,%%%%cx; lahf; movzbl %%%%ah,%%%%eax;"
" movl intel_flag_lookup(,%%%%eax,4),%%%%eax; seto %%%%al \""
": \"=a\" (regflags.longflags), \"=&c\" (%s) "
": \"rm\" ((WORD)(%s)), \"rmi\" ((WORD)(%s)) : \"cc\");",
value, src, dst);
break;
case sz_long:
printf("\t__asm__(\"movl %%3,%%%%ecx; subl %%2,%%%%ecx; lahf; movzbl %%%%ah,%%%%eax;"
" movl intel_flag_lookup(,%%%%eax,4),%%%%eax; seto %%%%al \""
": \"=a\" (regflags.longflags), \"=&c\" (%s) "
": \"rm\" ((LONG)(%s)), \"rmi\" ((LONG)(%s)) : \"cc\");",
value, src, dst);
break;
case sz_unknown:
abort();
}
return;
}
#endif
genflags_normal(type, size, value, src, dst);
}
static void gen_opcode(unsigned long int opcode)
{
start_brace ();
switch (table68k[opcode].plev) {
case 0: /* not priviledged */
break;
case 1: /* unpriviledged only on 68000 */
if (CPU_LEVEL == 0)
break;
case 2: /* priviledged */
printf("if (!regs.s) { regs.pc_p--; Exception(8); } else\n");
start_brace();
break;
case 3: /* priviledged if size == word */
if (table68k[opcode].size == sz_byte)
break;
printf("if (!regs.s) { regs.pc_p--; Exception(8); } else\n");
start_brace();
break;
}
switch(table68k[opcode].mnemo) {
case i_OR:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst", 1, 0);
printf("\tsrc |= dst;\n");
genflags(flag_logical, table68k[opcode].size, "src", "", "");
genastore("src", table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst");
break;
case i_AND:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst", 1, 0);
printf("\tsrc &= dst;\n");
genflags(flag_logical, table68k[opcode].size, "src", "", "");
genastore("src", table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst");
break;
case i_EOR:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst", 1, 0);
printf("\tsrc ^= dst;\n");
genflags(flag_logical, table68k[opcode].size, "src", "", "");
genastore("src", table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst");
break;
case i_ORSR:
printf("\tMakeSR();\n");
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
if (table68k[opcode].size == sz_byte) {
printf("\tsrc &= 0xFF;\n");
}
printf("\tregs.sr |= src;\n");
printf("\tMakeFromSR();\n");
break;
case i_ANDSR:
printf("\tMakeSR();\n");
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
if (table68k[opcode].size == sz_byte) {
printf("\tsrc |= 0xFF00;\n");
}
printf("\tregs.sr &= src;\n");
printf("\tMakeFromSR();\n");
break;
case i_EORSR:
printf("\tMakeSR();\n");
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
if (table68k[opcode].size == sz_byte) {
printf("\tsrc &= 0xFF;\n");
}
printf("\tregs.sr ^= src;\n");
printf("\tMakeFromSR();\n");
break;
case i_SUB:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst", 1, 0);
start_brace ();
genflags(flag_sub, table68k[opcode].size, "newv", "src", "dst");
genastore("newv", table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst");
break;
case i_SUBA:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", sz_long, "dst", 1, 0);
start_brace ();
printf("\tULONG newv = dst - src;\n");
genastore("newv", table68k[opcode].dmode, "dstreg", sz_long, "dst");
break;
case i_SUBX:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst", 1, 0);
start_brace ();
printf("\tULONG newv = dst - src - (regs.x ? 1 : 0);\n");
genflags(flag_subx, table68k[opcode].size, "newv", "src", "dst");
genflags(flag_zn, table68k[opcode].size, "newv", "", "");
genastore("newv", table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst");
break;
case i_SBCD:
/* Let's hope this works... */
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst", 1, 0);
start_brace ();
printf("\tUWORD newv_lo = (dst & 0xF) - (src & 0xF) - regs.x;\n");
printf("\tUWORD newv_hi = (dst & 0xF0) - (src & 0xF0);\n");
printf("\tUWORD newv;\n");
printf("\tif (newv_lo > 9) { newv_lo-=6; newv_hi-=0x10; }\n");
printf("\tnewv = newv_hi + (newv_lo & 0xF);");
printf("\tCFLG = regs.x = (newv_hi & 0x1F0) > 0x90;\n");
printf("\tif (CFLG) newv -= 0x60;\n");
genflags(flag_zn, table68k[opcode].size, "newv", "", "");
genflags(flag_sv, table68k[opcode].size, "newv", "src", "dst");
genastore("newv", table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst");
break;
case i_ADD:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst", 1, 0);
start_brace ();
genflags(flag_add, table68k[opcode].size, "newv", "src", "dst");
genastore("newv", table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst");
break;
case i_ADDA:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", sz_long, "dst", 1, 0);
start_brace ();
printf("\tULONG newv = dst + src;\n");
genastore("newv", table68k[opcode].dmode, "dstreg", sz_long, "dst");
break;
case i_ADDX:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst", 1, 0);
start_brace ();
printf("\tULONG newv = dst + src + (regs.x ? 1 : 0);\n");
genflags(flag_addx, table68k[opcode].size, "newv", "src", "dst");
genflags(flag_zn, table68k[opcode].size, "newv", "", "");
genastore("newv", table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst");
break;
case i_ABCD:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst", 1, 0);
start_brace ();
printf("\tUWORD newv_lo = (src & 0xF) + (dst & 0xF) + regs.x;\n");
printf("\tUWORD newv_hi = (src & 0xF0) + (dst & 0xF0);\n");
printf("\tUWORD newv;\n");
printf("\tif (newv_lo > 9) { newv_lo +=6; }\n");
printf("\tnewv = newv_hi + newv_lo;");
printf("\tCFLG = regs.x = (newv & 0x1F0) > 0x90;\n");
printf("\tif (CFLG) newv += 0x60;\n");
genflags(flag_zn, table68k[opcode].size, "newv", "", "");
genflags(flag_sv, table68k[opcode].size, "newv", "src", "dst");
genastore("newv", table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst");
break;
case i_NEG:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
start_brace ();
genflags(flag_sub, table68k[opcode].size, "dst", "src", "0");
genastore("dst",table68k[opcode].smode, "srcreg", table68k[opcode].size, "src");
break;
case i_NEGX:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
start_brace ();
printf("\tsrc += regs.x;\n");
genflags(flag_sub, table68k[opcode].size, "dst", "src", "0");
genastore("dst",table68k[opcode].smode, "srcreg", table68k[opcode].size, "src");
break;
case i_NBCD:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
start_brace ();
printf("\tUWORD newv_lo = - (src & 0xF) - regs.x;\n");
printf("\tUWORD newv_hi = - (src & 0xF0);\n");
printf("\tUWORD newv;\n");
printf("\tif (newv_lo > 9) { newv_lo-=6; newv_hi-=0x10; }\n");
printf("\tnewv = newv_hi + (newv_lo & 0xF);");
printf("\tCFLG = regs.x = (newv_hi & 0x1F0) > 0x90;\n");
printf("\tif (CFLG) newv -= 0x60;\n");
printf("\tif (newv != 0) ZFLG = 0;\n");
genastore("newv", table68k[opcode].smode, "srcreg", table68k[opcode].size, "src");
break;
case i_CLR:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 0, 0);
genflags(flag_logical, table68k[opcode].size, "0", "", "");
genastore("0",table68k[opcode].smode, "srcreg", table68k[opcode].size, "src");
break;
case i_NOT:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
start_brace ();
printf("\tULONG dst = ~src;\n");
genflags(flag_logical, table68k[opcode].size, "dst", "", "");
genastore("dst",table68k[opcode].smode, "srcreg", table68k[opcode].size, "src");
break;
case i_TST:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
genflags(flag_logical, table68k[opcode].size, "src", "", "");
break;
case i_BTST:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst", 1, 0);
if (table68k[opcode].size == sz_byte)
printf("\tsrc &= 7;\n");
else
printf("\tsrc &= 31;\n");
printf("\tZFLG = !(dst & (1 << src));\n");
break;
case i_BCHG:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst", 1, 0);
if (table68k[opcode].size == sz_byte)
printf("\tsrc &= 7;\n");
else
printf("\tsrc &= 31;\n");
printf("\tZFLG = !(dst & (1 << src));\n");
printf("\tdst ^= (1 << src);\n");
genastore("dst", table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst");
break;
case i_BCLR:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst", 1, 0);
if (table68k[opcode].size == sz_byte)
printf("\tsrc &= 7;\n");
else
printf("\tsrc &= 31;\n");
printf("\tZFLG = !(dst & (1 << src));\n");
printf("\tdst &= ~(1 << src);\n");
genastore("dst", table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst");
break;
case i_BSET:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst", 1, 0);
if (table68k[opcode].size == sz_byte)
printf("\tsrc &= 7;\n");
else
printf("\tsrc &= 31;\n");
printf("\tZFLG = !(dst & (1 << src));\n");
printf("\tdst |= (1 << src);\n");
genastore("dst", table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst");
break;
case i_CMPM:
case i_CMP:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst", 1, 0);
start_brace ();
genflags(flag_cmp, table68k[opcode].size, "newv", "src", "dst");
break;
case i_CMPA:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", sz_long, "dst", 1, 0);
start_brace ();
genflags(flag_cmp, sz_long, "newv", "src", "dst");
break;
/* The next two are coded a little unconventional, but they are doing
* weird things... */
case i_MVPRM:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
printf("\tCPTR memp = regs.a[dstreg] + nextiword();\n");
if (table68k[opcode].size == sz_word) {
printf("\tput_byte(memp, src >> 8); put_byte(memp + 2, src);\n");
} else {
printf("\tput_byte(memp, src >> 24); put_byte(memp + 2, src >> 16);\n");
printf("\tput_byte(memp + 4, src >> 8); put_byte(memp + 6, src);\n");
}
break;
case i_MVPMR:
printf("\tCPTR memp = regs.a[srcreg] + nextiword();\n");
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst", 0, 0);
if (table68k[opcode].size == sz_word) {
printf("\tUWORD val = (get_byte(memp) << 8) + get_byte(memp + 2);\n");
} else {
printf("\tULONG val = (get_byte(memp) << 24) + (get_byte(memp + 2) << 16)\n");
printf(" + (get_byte(memp + 4) << 8) + get_byte(memp + 6);\n");
}
genastore("val", table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst");
break;
case i_MOVE:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst", 0, 0);
genflags(flag_logical, table68k[opcode].size, "src", "", "");
genastore("src", table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst");
break;
case i_MOVEA:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst", 0, 0);
genastore("src", table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst");
break;
case i_MVSR2:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 0, 0);
printf("\tMakeSR();\n");
genastore("regs.sr", table68k[opcode].smode, "srcreg", table68k[opcode].size, "src");
break;
case i_MV2SR:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
if (table68k[opcode].size == sz_byte)
printf("\tMakeSR();\n\tregs.sr &= 0xFF00;\n\tregs.sr |= src & 0xFF;\n");
else {
printf("\tregs.sr = src;\n");
}
printf("\tMakeFromSR();\n");
break;
case i_SWAP:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
start_brace ();
printf("\tULONG dst = ((src >> 16)&0xFFFF) | ((src&0xFFFF)<<16);\n");
genflags(flag_logical, table68k[opcode].size, "dst", "", "");
genastore("dst",table68k[opcode].smode, "srcreg", table68k[opcode].size, "src");
break;
case i_EXG:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst", 1, 0);
genastore("dst",table68k[opcode].smode, "srcreg", table68k[opcode].size, "src");
genastore("src",table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst");
break;
case i_EXT:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
start_brace ();
switch(table68k[opcode].size) {
case sz_word: printf("\tULONG dst = (LONG)(BYTE)src;\n"); break;
case sz_long: printf("\tULONG dst = (LONG)(WORD)src;\n"); break;
default: abort();
}
genflags(flag_logical, table68k[opcode].size, "dst", "", "");
genastore("dst",table68k[opcode].smode, "srcreg", table68k[opcode].size, "src");
break;
case i_MVMEL:
genmovemel(opcode);
break;
case i_MVMLE:
genmovemle(opcode);
break;
case i_TRAP:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
printf("\tException(src+32);\n");
break;
case i_MVR2USP:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
printf("\tregs.usp = src;\n");
break;
case i_MVUSP2R:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 0, 0);
genastore("regs.usp", table68k[opcode].smode, "srcreg", table68k[opcode].size, "src");
break;
case i_RESET:
printf("\tcustomreset();\n");
break;
case i_NOP:
break;
case i_STOP:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
printf("\tregs.sr = src;\n");
printf("\tMakeFromSR();\n");
printf("\tm68k_setstopped(1);\n");
break;
case i_RTE:
genamode(Aipi, "7", sz_word, "sr", 1, 0);
genamode(Aipi, "7", sz_long, "pc", 1, 0);
if (CPU_LEVEL > 0) {
genamode(Aipi, "7", sz_word, "format", 1, 0);
}
printf("\tregs.sr = sr; m68k_setpc(pc);\n");
if (CPU_LEVEL > 0) {
printf("\tif ((format & 0xF000) == 0x8000) regs.a[7] += 50;\n");
}
printf("\tMakeFromSR();\n");
break;
case i_RTD:
break;
case i_LINK:
genamode(Apdi, "7", sz_long, "old", 0, 0);
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
genastore("src", Apdi, "7", sz_long, "old");
genastore("regs.a[7]", table68k[opcode].smode, "srcreg", table68k[opcode].size, "src");
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "offs", 1, 0);
printf("\tregs.a[7] += offs;\n");
break;
case i_UNLK:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
printf("\tregs.a[7] = src;\n");
genamode(Aipi, "7", sz_long, "old", 1, 0);
genastore("old", table68k[opcode].smode, "srcreg", table68k[opcode].size, "src");
break;
case i_RTS:
genamode(Aipi, "7", sz_long, "pc", 1, 0);
printf("\tm68k_setpc(pc);\n");
break;
case i_TRAPV:
printf("\tif(VFLG) Exception(7);\n");
break;
case i_RTR:
printf("\tMakeSR();\n");
genamode(Aipi, "7", sz_word, "sr", 1, 0);
genamode(Aipi, "7", sz_long, "pc", 1, 0);
printf("\tregs.sr &= 0xFF00; sr &= 0xFF;\n");
printf("\tregs.sr |= sr; m68k_setpc(pc);\n");
printf("\tMakeFromSR();\n");
break;
case i_JSR:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 0, 0);
genamode(Apdi, "7", sz_long, "sp", 0, 0);
genastore("m68k_getpc()", Apdi, "7", sz_long, "sp");
printf("\tm68k_setpc(srca);\n");
break;
case i_JMP:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 0, 0);
printf("\tm68k_setpc(srca);\n");
break;
case i_BSR:
printf("\tchar *oldpcp = (char *)regs.pc_p;\n");
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
genamode(Apdi, "7", sz_long, "sp", 0, 0);
genastore("m68k_getpc()", Apdi, "7", sz_long, "sp");
printf("\tregs.pc_p = (UWORD *)(oldpcp + (LONG)src);\n");
break;
case i_Bcc:
printf("\tchar *oldpcp = (char *)regs.pc_p;\n");
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
printf("\tif (cctrue(%d)) regs.pc_p = (UWORD *)(oldpcp + (LONG)src);\n", table68k[opcode].cc);
break;
case i_LEA:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 0, 0);
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst", 0, 0);
genastore("srca", table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst");
break;
case i_PEA:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 0, 0);
genamode(Apdi, "7", sz_long, "dst", 0, 0);
genastore("srca", Apdi, "7", sz_long, "dst");
break;
case i_DBcc:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "offs", 1, 0);
printf("\tif (!cctrue(%d)) {\n", table68k[opcode].cc);
printf("\tif (src--) regs.pc_p = (UWORD *)((char *)regs.pc_p + (LONG)offs - 2);\n");
genastore("src", table68k[opcode].smode, "srcreg", table68k[opcode].size, "src");
printf("\t}\n");
break;
case i_Scc:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 0, 0);
start_brace ();
printf("\tint val = cctrue(%d) ? 0xff : 0;\n", table68k[opcode].cc);
genastore("val",table68k[opcode].smode, "srcreg", table68k[opcode].size, "src");
break;
case i_DIVU:
genamode(table68k[opcode].smode, "srcreg", sz_word, "src", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", sz_long, "dst", 1, 0);
printf("\tif(src != 0){\n");
printf("\tULONG newv = (ULONG)dst / (UWORD)src;\n");
printf("\tULONG rem = (ULONG)dst %% (UWORD)src;\n");
/* The N flag appears to be set each time there is an overflow.
* Weird. */
printf("\tif (newv > 0xffff) { VFLG = NFLG = 1; } else\n\t{\n");
genflags(flag_logical, sz_word, "newv", "", "");
printf("\tnewv = (newv & 0xffff) | ((ULONG)rem << 16);\n");
genastore("newv",table68k[opcode].dmode, "dstreg", sz_long, "dst");
printf("\t}\n");
printf("\t}\n");
break;
case i_DIVS:
genamode(table68k[opcode].smode, "srcreg", sz_word, "src", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", sz_long, "dst", 1, 0);
printf("\tif(src != 0){\n");
printf("\tLONG newv = (LONG)dst / (WORD)src;\n");
printf("\tUWORD rem = (LONG)dst %% (WORD)src;\n");
printf("\tif ((newv & 0xffff0000) && (newv & 0xffff0000) != 0xffff0000) { VFLG = NFLG = 1; } else\n\t{\n");
printf("\tif (((WORD)rem < 0) != ((LONG)dst < 0)) rem = -rem;\n");
genflags(flag_logical, sz_word, "newv", "", "");
printf("\tnewv = (newv & 0xffff) | ((ULONG)rem << 16);\n");
genastore("newv",table68k[opcode].dmode, "dstreg", sz_long, "dst");
printf("\t}\n");
printf("\t}\n");
break;
case i_MULU:
genamode(table68k[opcode].smode, "srcreg", sz_word, "src", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", sz_word, "dst", 1, 0);
start_brace ();
printf("\tULONG newv = (ULONG)(UWORD)dst * (ULONG)(UWORD)src;\n");
genflags(flag_logical, sz_long, "newv", "", "");
genastore("newv",table68k[opcode].dmode, "dstreg", sz_long, "dst");
#ifdef WANT_SLOW_MULTIPLY
printf("\tspecialflags |= SPCFLAG_EXTRA_CYCLES;\n");
#endif
break;
case i_MULS:
genamode(table68k[opcode].smode, "srcreg", sz_word, "src", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", sz_word, "dst", 1, 0);
start_brace ();
printf("\tULONG newv = (LONG)(WORD)dst * (LONG)(WORD)src;\n");
genflags(flag_logical, sz_long, "newv", "", "");
genastore("newv",table68k[opcode].dmode, "dstreg", sz_long, "dst");
#ifdef WANT_SLOW_MULTIPLY
printf("\tspecialflags |= SPCFLAG_EXTRA_CYCLES;\n");
#endif
break;
case i_CHK:
genamode(table68k[opcode].smode, "srcreg", sz_word, "src", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", sz_word, "dst", 1, 0);
printf("\tif ((WORD)dst < 0) { NFLG=1; Exception(6); }\n");
printf("\telse if ((WORD)dst > (WORD)src) { NFLG=0; Exception(6); }\n");
break;
case i_ASR:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "cnt", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "data", 1, 0);
start_brace ();
switch(table68k[opcode].size) {
case sz_byte: printf("\tUBYTE val = data;\n"); break;
case sz_word: printf("\tUWORD val = data;\n"); break;
case sz_long: printf("\tULONG val = data;\n"); break;
default: abort();
}
switch(table68k[opcode].size) {
case sz_byte: printf("\tULONG cmask = 0x80;\n"); break;
case sz_word: printf("\tULONG cmask = 0x8000;\n"); break;
case sz_long: printf("\tULONG cmask = 0x80000000;\n"); break;
default: abort();
}
printf("\tULONG sign = cmask & val;\n");
printf("\tcnt &= 63;\n");
printf("\tVFLG = 0;\n");
printf("\tif (!cnt) { CFLG = 0; } else {");
printf("\tfor(;cnt;--cnt){\n");
printf("\tCFLG=regs.x=val&1; val = ((ULONG)val >> 1) | sign;\n");
printf("\t}}\n\tNFLG = sign != 0;\n");
printf("\tZFLG = val == 0;\n");
genastore("val", table68k[opcode].dmode, "dstreg", table68k[opcode].size, "data");
break;
case i_ASL:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "cnt", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "data", 1, 0);
start_brace ();
switch(table68k[opcode].size) {
case sz_byte: printf("\tUBYTE val = data;\n"); break;
case sz_word: printf("\tUWORD val = data;\n"); break;
case sz_long: printf("\tULONG val = data;\n"); break;
default: abort();
}
switch(table68k[opcode].size) {
case sz_byte: printf("\tULONG cmask = 0x80;\n"); break;
case sz_word: printf("\tULONG cmask = 0x8000;\n"); break;
case sz_long: printf("\tULONG cmask = 0x80000000;\n"); break;
default: abort();
}
printf("\tULONG sign = cmask & val;\n");
printf("\tcnt &= 63;\n");
printf("\tVFLG = 0;\n");
printf("\tif (!cnt) { CFLG = 0; } else { ");
printf("\tfor(;cnt;--cnt){\n");
printf("\tCFLG=regs.x=(val&cmask)!=0; val <<= 1;\n");
printf("\tif ((val&cmask)!=sign)VFLG=1;\n");
printf("\t}}\n\tNFLG = (val&cmask) != 0;\n");
printf("\tZFLG = val == 0;\n");
genastore("val", table68k[opcode].dmode, "dstreg", table68k[opcode].size, "data");
break;
case i_LSR:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "cnt", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "data", 1, 0);
start_brace ();
switch(table68k[opcode].size) {
case sz_byte: printf("\tUBYTE val = data;\n"); break;
case sz_word: printf("\tUWORD val = data;\n"); break;
case sz_long: printf("\tULONG val = data;\n"); break;
default: abort();
}
switch(table68k[opcode].size) {
case sz_byte: printf("\tULONG cmask = 0x80;\n"); break;
case sz_word: printf("\tULONG cmask = 0x8000;\n"); break;
case sz_long: printf("\tULONG cmask = 0x80000000;\n"); break;
default: abort();
}
printf("\tcnt &= 63;\n");
printf("\tif (!cnt) { CFLG = 0; } else {");
printf("\tint carry = 0;\n");
printf("\tfor(;cnt;--cnt){\n");
printf("\tcarry=val&1; val >>= 1;\n");
printf("\t}\n");
printf("\tCFLG = regs.x = carry!=0;\n}\n");
printf("\tNFLG = (val & cmask) != 0; ZFLG = val == 0; VFLG = 0;\n");
genastore("val", table68k[opcode].dmode, "dstreg", table68k[opcode].size, "data");
break;
case i_LSL:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "cnt", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "data", 1, 0);
start_brace ();
switch(table68k[opcode].size) {
case sz_byte: printf("\tUBYTE val = data;\n"); break;
case sz_word: printf("\tUWORD val = data;\n"); break;
case sz_long: printf("\tULONG val = data;\n"); break;
default: abort();
}
switch(table68k[opcode].size) {
case sz_byte: printf("\tULONG cmask = 0x80;\n"); break;
case sz_word: printf("\tULONG cmask = 0x8000;\n"); break;
case sz_long: printf("\tULONG cmask = 0x80000000;\n"); break;
default: abort();
}
printf("\tint carry = 0;\n");
printf("\tcnt &= 63;\n");
printf("\tif (!cnt) { CFLG = 0; } else {");
printf("\tfor(;cnt;--cnt){\n");
printf("\tcarry=val&cmask; val <<= 1;\n");
printf("\t}\n");
printf("\tCFLG = regs.x = carry!=0;\n}\n");
printf("\tNFLG = (val & cmask) != 0; ZFLG = val == 0; VFLG = 0;\n");
genastore("val", table68k[opcode].dmode, "dstreg", table68k[opcode].size, "data");
break;
case i_ROL:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "cnt", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "data", 1, 0);
start_brace ();
switch(table68k[opcode].size) {
case sz_byte: printf("\tUBYTE val = data;\n"); break;
case sz_word: printf("\tUWORD val = data;\n"); break;
case sz_long: printf("\tULONG val = data;\n"); break;
default: abort();
}
switch(table68k[opcode].size) {
case sz_byte: printf("\tULONG cmask = 0x80;\n"); break;
case sz_word: printf("\tULONG cmask = 0x8000;\n"); break;
case sz_long: printf("\tULONG cmask = 0x80000000;\n"); break;
default: abort();
}
printf("\tint carry = 0;\n");
printf("\tcnt &= 63;\n");
printf("\tif (!cnt) { CFLG = 0; } else {");
printf("\tfor(;cnt;--cnt){\n");
printf("\tcarry=val&cmask; val <<= 1;\n");
printf("\tif(carry) val |= 1;\n");
printf("\t}\n");
printf("\tCFLG = carry!=0;\n}\n");
printf("\tNFLG = (val & cmask) != 0; ZFLG = val == 0; VFLG = 0;\n");
genastore("val", table68k[opcode].dmode, "dstreg", table68k[opcode].size, "data");
break;
case i_ROR:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "cnt", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "data", 1, 0);
start_brace ();
switch(table68k[opcode].size) {
case sz_byte: printf("\tUBYTE val = data;\n"); break;
case sz_word: printf("\tUWORD val = data;\n"); break;
case sz_long: printf("\tULONG val = data;\n"); break;
default: abort();
}
switch(table68k[opcode].size) {
case sz_byte: printf("\tULONG cmask = 0x80;\n"); break;
case sz_word: printf("\tULONG cmask = 0x8000;\n"); break;
case sz_long: printf("\tULONG cmask = 0x80000000;\n"); break;
default: abort();
}
printf("\tint carry = 0;\n");
printf("\tcnt &= 63;\n");
printf("\tif (!cnt) { CFLG = 0; } else {");
printf("\tfor(;cnt;--cnt){\n");
printf("\tcarry=val&1; val = (ULONG)val >> 1;\n");
printf("\tif(carry) val |= cmask;\n");
printf("\t}\n");
printf("\tCFLG = carry!=0;\n}\n");
printf("\tNFLG = (val & cmask) != 0; ZFLG = val == 0; VFLG = 0;\n");
genastore("val", table68k[opcode].dmode, "dstreg", table68k[opcode].size, "data");
break;
case i_ROXL:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "cnt", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "data", 1, 0);
start_brace ();
switch(table68k[opcode].size) {
case sz_byte: printf("\tUBYTE val = data;\n"); break;
case sz_word: printf("\tUWORD val = data;\n"); break;
case sz_long: printf("\tULONG val = data;\n"); break;
default: abort();
}
switch(table68k[opcode].size) {
case sz_byte: printf("\tULONG cmask = 0x80;\n"); break;
case sz_word: printf("\tULONG cmask = 0x8000;\n"); break;
case sz_long: printf("\tULONG cmask = 0x80000000;\n"); break;
default: abort();
}
printf("\tint carry = 0;\n");
printf("\tcnt &= 63;\n");
printf("\tfor(;cnt;--cnt){\n");
printf("\tcarry=val&cmask; val <<= 1;\n");
printf("\tif(regs.x) val |= 1;\n");
printf("\tregs.x = carry != 0;\n");
printf("\t}\n");
printf("\tCFLG = regs.x;\n");
printf("\tNFLG = (val & cmask) != 0; ZFLG = val == 0; VFLG = 0;\n");
genastore("val", table68k[opcode].dmode, "dstreg", table68k[opcode].size, "data");
break;
case i_ROXR:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "cnt", 1, 0);
genamode(table68k[opcode].dmode, "dstreg", table68k[opcode].size, "data", 1, 0);
start_brace ();
switch(table68k[opcode].size) {
case sz_byte: printf("\tUBYTE val = data;\n"); break;
case sz_word: printf("\tUWORD val = data;\n"); break;
case sz_long: printf("\tULONG val = data;\n"); break;
default: abort();
}
switch(table68k[opcode].size) {
case sz_byte: printf("\tULONG cmask = 0x80;\n"); break;
case sz_word: printf("\tULONG cmask = 0x8000;\n"); break;
case sz_long: printf("\tULONG cmask = 0x80000000;\n"); break;
default: abort();
}
printf("\tint carry = 0;\n");
printf("\tcnt &= 63;\n");
printf("\tfor(;cnt;--cnt){\n");
printf("\tcarry=val&1; val >>= 1;\n");
printf("\tif(regs.x) val |= cmask;\n");
printf("\tregs.x = carry != 0;\n");
printf("\t}\n");
printf("\tCFLG = regs.x;\n");
printf("\tNFLG = (val & cmask) != 0; ZFLG = val == 0; VFLG = 0;\n");
genastore("val", table68k[opcode].dmode, "dstreg", table68k[opcode].size, "data");
break;
case i_ASRW:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "data", 1, 0);
printf("\tVFLG = 0;\n");
start_brace ();
switch(table68k[opcode].size) {
case sz_byte: printf("\tUBYTE val = data;\n"); break;
case sz_word: printf("\tUWORD val = data;\n"); break;
case sz_long: printf("\tULONG val = data;\n"); break;
default: abort();
}
switch(table68k[opcode].size) {
case sz_byte: printf("\tULONG cmask = 0x80;\n"); break;
case sz_word: printf("\tULONG cmask = 0x8000;\n"); break;
case sz_long: printf("\tULONG cmask = 0x80000000;\n"); break;
default: abort();
}
printf("\tULONG sign = cmask & val;\n");
printf("\tCFLG=regs.x=val&1; val = (val >> 1) | sign;\n");
printf("\tNFLG = sign != 0;\n");
printf("\tZFLG = val == 0;\n");
genastore("val", table68k[opcode].smode, "srcreg", table68k[opcode].size, "data");
break;
case i_ASLW:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "data", 1, 0);
printf("\tVFLG = 0;\n");
start_brace ();
switch(table68k[opcode].size) {
case sz_byte: printf("\tUBYTE val = data;\n"); break;
case sz_word: printf("\tUWORD val = data;\n"); break;
case sz_long: printf("\tULONG val = data;\n"); break;
default: abort();
}
switch(table68k[opcode].size) {
case sz_byte: printf("\tULONG cmask = 0x80;\n"); break;
case sz_word: printf("\tULONG cmask = 0x8000;\n"); break;
case sz_long: printf("\tULONG cmask = 0x80000000;\n"); break;
default: abort();
}
printf("\tULONG sign = cmask & val;\n");
printf("\tCFLG=regs.x=(val&cmask)!=0; val <<= 1;\n");
printf("\tif ((val&cmask)!=sign) VFLG=1;\n");
printf("\tNFLG = (val&cmask) != 0;\n");
printf("\tZFLG = val == 0;\n");
genastore("val", table68k[opcode].smode, "srcreg", table68k[opcode].size, "data");
break;
case i_LSRW:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "data", 1, 0);
start_brace ();
switch(table68k[opcode].size) {
case sz_byte: printf("\tUBYTE val = data;\n"); break;
case sz_word: printf("\tUWORD val = data;\n"); break;
case sz_long: printf("\tULONG val = data;\n"); break;
default: abort();
}
printf("\tint carry = val&1;\n");
printf("\tcarry=val&1; val >>= 1;\n");
genflags(flag_logical, table68k[opcode].size, "val", "", "");
printf("CFLG = regs.x = carry!=0;\n");
genastore("val", table68k[opcode].smode, "srcreg", table68k[opcode].size, "data");
break;
case i_LSLW:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "data", 1, 0);
start_brace ();
switch(table68k[opcode].size) {
case sz_byte: printf("\tUBYTE val = data;\n"); break;
case sz_word: printf("\tUWORD val = data;\n"); break;
case sz_long: printf("\tULONG val = data;\n"); break;
default: abort();
}
switch(table68k[opcode].size) {
case sz_byte: printf("\tULONG cmask = 0x80;\n"); break;
case sz_word: printf("\tULONG cmask = 0x8000;\n"); break;
case sz_long: printf("\tULONG cmask = 0x80000000;\n"); break;
default: abort();
}
printf("\tint carry = val&cmask;\n");
printf("\tval <<= 1;\n");
genflags(flag_logical, table68k[opcode].size, "val", "", "");
printf("CFLG = regs.x = carry!=0;\n");
genastore("val", table68k[opcode].smode, "srcreg", table68k[opcode].size, "data");
break;
case i_ROLW:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "data", 1, 0);
start_brace ();
switch(table68k[opcode].size) {
case sz_byte: printf("\tUBYTE val = data;\n"); break;
case sz_word: printf("\tUWORD val = data;\n"); break;
case sz_long: printf("\tULONG val = data;\n"); break;
default: abort();
}
switch(table68k[opcode].size) {
case sz_byte: printf("\tULONG cmask = 0x80;\n"); break;
case sz_word: printf("\tULONG cmask = 0x8000;\n"); break;
case sz_long: printf("\tULONG cmask = 0x80000000;\n"); break;
default: abort();
}
printf("\tint carry = val&cmask;\n");
printf("\tval <<= 1;\n");
printf("\tif(carry) val |= 1;\n");
genflags(flag_logical, table68k[opcode].size, "val", "", "");
printf("CFLG = carry!=0;\n");
genastore("val", table68k[opcode].smode, "srcreg", table68k[opcode].size, "data");
break;
case i_RORW:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "data", 1, 0);
start_brace ();
switch(table68k[opcode].size) {
case sz_byte: printf("\tUBYTE val = data;\n"); break;
case sz_word: printf("\tUWORD val = data;\n"); break;
case sz_long: printf("\tULONG val = data;\n"); break;
default: abort();
}
printf("\tint carry = val&1;\n");
switch(table68k[opcode].size) {
case sz_byte: printf("\tULONG cmask = 0x80;\n"); break;
case sz_word: printf("\tULONG cmask = 0x8000;\n"); break;
case sz_long: printf("\tULONG cmask = 0x80000000;\n"); break;
default: abort();
}
printf("\tval >>= 1;\n");
printf("\tif(carry) val |= cmask;\n");
genflags(flag_logical, table68k[opcode].size, "val", "", "");
printf("CFLG = carry!=0;\n");
genastore("val", table68k[opcode].smode, "srcreg", table68k[opcode].size, "data");
break;
case i_ROXLW:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "data", 1, 0);
start_brace ();
switch(table68k[opcode].size) {
case sz_byte: printf("\tUBYTE val = data;\n"); break;
case sz_word: printf("\tUWORD val = data;\n"); break;
case sz_long: printf("\tULONG val = data;\n"); break;
default: abort();
}
switch(table68k[opcode].size) {
case sz_byte: printf("\tULONG cmask = 0x80;\n"); break;
case sz_word: printf("\tULONG cmask = 0x8000;\n"); break;
case sz_long: printf("\tULONG cmask = 0x80000000;\n"); break;
default: abort();
}
printf("\tint carry = val&cmask;\n");
printf("\tval <<= 1;\n");
printf("\tif(regs.x) val |= 1;\n");
printf("\tregs.x = carry != 0;\n");
genflags(flag_logical, table68k[opcode].size, "val", "", "");
printf("regs.x = CFLG = carry!=0;\n");
genastore("val", table68k[opcode].smode, "srcreg", table68k[opcode].size, "data");
break;
case i_ROXRW:
genamode(table68k[opcode].smode, "srcreg", table68k[opcode].size, "data", 1, 0);
start_brace ();
switch(table68k[opcode].size) {
case sz_byte: printf("\tUBYTE val = data;\n"); break;
case sz_word: printf("\tUWORD val = data;\n"); break;
case sz_long: printf("\tULONG val = data;\n"); break;
default: abort();
}
printf("\tint carry = val&1;\n");
switch(table68k[opcode].size) {
case sz_byte: printf("\tULONG cmask = 0x80;\n"); break;
case sz_word: printf("\tULONG cmask = 0x8000;\n"); break;
case sz_long: printf("\tULONG cmask = 0x80000000;\n"); break;
default: abort();
}
printf("\tval >>= 1;\n");
printf("\tif(regs.x) val |= cmask;\n");
printf("\tregs.x = carry != 0;\n");
genflags(flag_logical, table68k[opcode].size, "val", "", "");
printf("regs.x = CFLG = carry!=0;\n");
genastore("val", table68k[opcode].smode, "srcreg", table68k[opcode].size, "data");
break;
case i_MOVEC2:
genamode (table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
start_brace();
printf("\tint regno = (src >> 12) & 7;\n");
printf("\tULONG *regp = src & 0x8000 ? regs.a + regno : regs.d + regno;\n");
printf("\tm68k_movec2(src & 0xFFF, regp);\n");
break;
case i_MOVE2C:
genamode (table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
start_brace();
printf("\tint regno = (src >> 12) & 7;\n");
printf("\tULONG *regp = src & 0x8000 ? regs.a + regno : regs.d + regno;\n");
printf("\tm68k_move2c(src & 0xFFF, regp);\n");
break;
case i_CAS:
{
int old_brace_level;
genamode (table68k[opcode].smode, "srcreg", table68k[opcode].size, "src", 1, 0);
genamode (table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst", 1, 0);
start_brace();
printf("\tint ru = (src >> 6) & 7;\n");
printf("\tint rc = src & 7;\n");
printf("\tif ((LONG)regs.d[rc] == (LONG)dst)");
old_brace_level = n_braces;
start_brace ();
genastore("(regs.d[ru])",table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst");
pop_braces (old_brace_level);
printf("else");
start_brace ();
printf("regs.d[rc] = dst;\n");
pop_braces (old_brace_level);
}
break;
case i_DIVL:
genamode (table68k[opcode].smode, "srcreg", table68k[opcode].size, "extra", 1, 0);
genamode (table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst", 1, 0);
printf("\tm68k_divl(opcode, dst, extra);\n");
break;
case i_MULL:
genamode (table68k[opcode].smode, "srcreg", table68k[opcode].size, "extra", 1, 0);
genamode (table68k[opcode].dmode, "dstreg", table68k[opcode].size, "dst", 1, 0);
printf("\tm68k_mull(opcode, dst, extra);\n");
break;
default:
abort();
break;
};
finish_braces ();
}
static void generate_func(long int from, long int to)
{
int illg = 0;
long int opcode;
UWORD smsk;
UWORD dmsk;
printf("#include \"sysconfig.h\"\n");
printf("#include \"sysdeps.h\"\n");
printf("#include \"config.h\"\n");
printf("#include \"options.h\"\n");
printf("#include \"memory.h\"\n");
printf("#include \"custom.h\"\n");
printf("#include \"newcpu.h\"\n");
printf("#include \"cputbl.h\"\n");
for(opcode=from; opcode < to; opcode++) {
if (table68k[opcode].mnemo == i_ILLG) {
illg++;
continue;
}
if (isspecific(opcode)) {
printf("void op_%lx_s(ULONG opcode)\n{\n", opcode);
if (table68k[opcode].suse
&& table68k[opcode].smode != imm && table68k[opcode].smode != imm0
&& table68k[opcode].smode != imm1 && table68k[opcode].smode != imm2
&& table68k[opcode].smode != absw && table68k[opcode].smode != absl
&& table68k[opcode].smode != PC8r && table68k[opcode].smode != PC16)
{
printf("\tULONG srcreg = (LONG)(BYTE)%d;\n", (int)table68k[opcode].sreg);
}
if (table68k[opcode].duse
/* Yes, the dmode can be imm, in case of LINK or DBcc */
&& table68k[opcode].dmode != imm && table68k[opcode].dmode != imm0
&& table68k[opcode].dmode != imm1 && table68k[opcode].dmode != imm2
&& table68k[opcode].dmode != absw && table68k[opcode].dmode != absl) {
printf("\tULONG dstreg = (LONG)(BYTE)%d;\n", (int)table68k[opcode].dreg);
}
gen_opcode(opcode);
printf("}\n");
}
if (table68k[opcode].handler != -1)
continue;
switch (table68k[opcode].stype) {
case 0:
smsk = 7; break;
case 1:
smsk = 255; break;
case 2:
smsk = 15; break;
case 3:
smsk = 7; break;
default:
abort();
}
smsk <<= table68k[opcode].spos;
dmsk = 7 << table68k[opcode].dpos;
printf("void op_%lx(ULONG opcode)\n{\n", opcode);
if (table68k[opcode].suse
&& table68k[opcode].smode != imm && table68k[opcode].smode != imm0
&& table68k[opcode].smode != imm1 && table68k[opcode].smode != imm2
&& table68k[opcode].smode != absw && table68k[opcode].smode != absl
&& table68k[opcode].smode != PC8r && table68k[opcode].smode != PC16)
{
if (table68k[opcode].spos == -1) {
printf("\tULONG srcreg = (LONG)(BYTE)%d;\n", (int)table68k[opcode].sreg);
} else {
if (table68k[opcode].stype == 3)
printf("\tULONG srcreg = imm8_table[(opcode & %d) >> %d];\n",
smsk, (int)table68k[opcode].spos);
else
printf("\tULONG srcreg = (LONG)(BYTE)((opcode & %d) >> %d);\n",
smsk, (int)table68k[opcode].spos);
}
}
if (table68k[opcode].duse
/* Yes, the dmode can be imm, in case of LINK or DBcc */
&& table68k[opcode].dmode != imm && table68k[opcode].dmode != imm0
&& table68k[opcode].dmode != imm1 && table68k[opcode].dmode != imm2
&& table68k[opcode].dmode != absw && table68k[opcode].dmode != absl) {
if (table68k[opcode].dpos == -1) {
printf("\tULONG dstreg = (LONG)(BYTE)%d;\n", (int)table68k[opcode].dreg);
} else {
printf("\tULONG dstreg = (opcode & %d) >> %d;\n", dmsk, (int)table68k[opcode].dpos);
}
}
gen_opcode(opcode);
printf("}\n");
}
fprintf (stderr, "%d illegals generated.\n", illg);
}
static void generate_table(void)
{
int illg = 0;
long int opcode;
printf("#include \"sysconfig.h\"\n");
printf("#include \"sysdeps.h\"\n");
printf("#include \"config.h\"\n");
printf("#include \"options.h\"\n");
printf("#include \"memory.h\"\n");
printf("#include \"custom.h\"\n");
printf("#include \"newcpu.h\"\n");
printf("#include \"cputbl.h\"\n");
printf("cpuop_func *cpufunctbl[65536] = {\n");
for(opcode=0; opcode < 65536; opcode++) {
if (table68k[opcode].mnemo == i_ILLG) {
printf("op_illg");
illg++;
} else if (isspecific(opcode))
printf("op_%lx_s", opcode);
else if (table68k[opcode].handler != -1)
printf("op_%lx", table68k[opcode].handler);
else
printf("op_%lx", opcode);
if (opcode < 65535) printf(",");
if ((opcode & 7) == 7) printf("\n");
}
printf("\n};\n");
fprintf (stderr, "%d illegals generated.\n", illg);
if (get_no_mismatches())
fprintf(stderr, "%d mismatches.\n", get_no_mismatches());
}
static void generate_smalltable(void)
{
long int opcode;
printf("#include \"sysconfig.h\"\n");
printf("#include \"sysdeps.h\"\n");
printf("#include \"config.h\"\n");
printf("#include \"options.h\"\n");
printf("#include \"memory.h\"\n");
printf("#include \"custom.h\"\n");
printf("#include \"newcpu.h\"\n");
printf("#include \"cputbl.h\"\n");
printf("struct cputbl smallcputbl[] = {\n");
for(opcode=0; opcode < 65536; opcode++) {
if ((isspecific(opcode) || table68k[opcode].handler == -1)
&& table68k[opcode].mnemo != i_ILLG)
{
if (isspecific(opcode))
printf("{ op_%x_s, 1, %d },\n", opcode, opcode);
if (table68k[opcode].handler == -1)
printf("{ op_%x, 0, %d },\n", opcode, opcode);
}
}
printf("{ 0, 0, 0 }};\n");
}
static void generate_header(void)
{
int illg = 0;
long int opcode;
for(opcode=0; opcode < 65536; opcode++) {
if (table68k[opcode].mnemo == i_ILLG) {
illg++;
continue;
}
if (isspecific(opcode))
printf("extern cpuop_func op_%lx_s;\n", opcode);
if (table68k[opcode].handler != -1)
continue;
printf("extern cpuop_func op_%lx;\n", opcode);
}
fprintf (stderr, "%d illegals generated.\n", illg);
if (get_no_mismatches())
fprintf(stderr, "%d mismatches.\n", get_no_mismatches());
}
int main(int argc, char **argv)
{
long int range = -1;
char mode = 'n';
int i;
if (argc == 2)
mode = *argv[1];
if (argc == 3) {
range = atoi(argv[2]);
mode = *argv[1];
}
read_table68k ();
read_counts();
do_merges ();
switch(mode) {
case 'f':
generate_func(range * 0x1000, (range + 1) * 0x1000);
break;
case 'h':
generate_header();
break;
case 't':
generate_table();
break;
case 's':
generate_smalltable();
break;
default:
abort();
}
free(table68k);
return 0;
}