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macemu/BasiliskII/src/uae_cpu/newcpu.cpp

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/*
* UAE - The Un*x Amiga Emulator
*
* MC68000 emulation
*
* (c) 1995 Bernd Schmidt
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "sysdeps.h"
#include "cpu_emulation.h"
#include "main.h"
#include "emul_op.h"
extern int intlev(void); // From baisilisk_glue.cpp
#include "m68k.h"
#include "memory.h"
#include "readcpu.h"
#include "newcpu.h"
#include "compiler/compemu.h"
#include "fpu/fpu.h"
#if defined(ENABLE_EXCLUSIVE_SPCFLAGS) && !defined(HAVE_HARDWARE_LOCKS)
B2_mutex *spcflags_lock = NULL;
#endif
bool quit_program = false;
struct flag_struct regflags;
/* Opcode of faulting instruction */
uae_u16 last_op_for_exception_3;
/* PC at fault time */
uaecptr last_addr_for_exception_3;
/* Address that generated the exception */
uaecptr last_fault_for_exception_3;
int areg_byteinc[] = { 1,1,1,1,1,1,1,2 };
int imm8_table[] = { 8,1,2,3,4,5,6,7 };
int movem_index1[256];
int movem_index2[256];
int movem_next[256];
cpuop_func *cpufunctbl[65536];
#if FLIGHT_RECORDER
struct rec_step {
uae_u32 pc;
#if FLIGHT_RECORDER >= 2
uae_u32 d[8];
uae_u32 a[8];
#endif
};
const int LOG_SIZE = 32768;
static rec_step log[LOG_SIZE];
static int log_ptr = -1; // First time initialization
static const char *log_filename(void)
{
const char *name = getenv("M68K_LOG_FILE");
return name ? name : "log.68k";
}
void m68k_record_step(uaecptr pc)
{
#if FLIGHT_RECORDER >= 2
/* XXX: if LSB is set, we are recording from generated code and we
don't support registers recording yet. */
if ((pc & 1) == 0) {
for (int i = 0; i < 8; i++) {
log[log_ptr].d[i] = m68k_dreg(regs, i);
log[log_ptr].a[i] = m68k_areg(regs, i);
}
}
#endif
log[log_ptr].pc = pc;
log_ptr = (log_ptr + 1) % LOG_SIZE;
}
static void dump_log(void)
{
FILE *f = fopen(log_filename(), "w");
if (f == NULL)
return;
for (int i = 0; i < LOG_SIZE; i++) {
int j = (i + log_ptr) % LOG_SIZE;
uae_u32 pc = log[j].pc & ~1;
fprintf(f, "pc %08x", pc);
#if FLIGHT_RECORDER >= 2
fprintf(f, "\n");
if ((log[j].pc & 1) == 0) {
fprintf(f, "d0 %08x d1 %08x d2 %08x d3 %08x\n", log[j].d[0], log[j].d[1], log[j].d[2], log[j].d[3]);
fprintf(f, "d4 %08x d5 %08x d6 %08x d7 %08x\n", log[j].d[4], log[j].d[5], log[j].d[6], log[j].d[7]);
fprintf(f, "a0 %08x a1 %08x a2 %08x a3 %08x\n", log[j].a[0], log[j].a[1], log[j].a[2], log[j].a[3]);
fprintf(f, "a4 %08x a5 %08x a6 %08x a7 %08x\n", log[j].a[4], log[j].a[5], log[j].a[6], log[j].a[7]);
}
#else
fprintf(f, " | ");
#endif
#if ENABLE_MON
disass_68k(f, pc);
#endif
}
fclose(f);
}
#endif
#if ENABLE_MON
static void dump_regs(void)
{
m68k_dumpstate(NULL);
}
#endif
#define COUNT_INSTRS 0
#if COUNT_INSTRS
static unsigned long int instrcount[65536];
static uae_u16 opcodenums[65536];
static int compfn (const void *el1, const void *el2)
{
return instrcount[*(const uae_u16 *)el1] < instrcount[*(const uae_u16 *)el2];
}
static char *icountfilename (void)
{
char *name = getenv ("INSNCOUNT");
if (name)
return name;
return COUNT_INSTRS == 2 ? "frequent.68k" : "insncount";
}
void dump_counts (void)
{
FILE *f = fopen (icountfilename (), "w");
unsigned long int total;
int i;
write_log ("Writing instruction count file...\n");
for (i = 0; i < 65536; i++) {
opcodenums[i] = i;
total += instrcount[i];
}
qsort (opcodenums, 65536, sizeof(uae_u16), compfn);
fprintf (f, "Total: %lu\n", total);
for (i=0; i < 65536; i++) {
unsigned long int cnt = instrcount[opcodenums[i]];
struct instr *dp;
struct mnemolookup *lookup;
if (!cnt)
break;
dp = table68k + opcodenums[i];
for (lookup = lookuptab;lookup->mnemo != dp->mnemo; lookup++)
;
fprintf (f, "%04x: %lu %s\n", opcodenums[i], cnt, lookup->name);
}
fclose (f);
}
#else
void dump_counts (void)
{
}
#endif
int broken_in;
static __inline__ unsigned int cft_map (unsigned int f)
{
#ifndef HAVE_GET_WORD_UNSWAPPED
return f;
#else
return ((f >> 8) & 255) | ((f & 255) << 8);
#endif
}
void REGPARAM2 op_illg_1 (uae_u32 opcode) REGPARAM;
void REGPARAM2 op_illg_1 (uae_u32 opcode)
{
op_illg (cft_map (opcode));
}
static void build_cpufunctbl (void)
{
int i;
unsigned long opcode;
unsigned int cpu_level = 0; // 68000 (default)
if (CPUType == 4)
cpu_level = 4; // 68040 with FPU
else {
if (FPUType)
cpu_level = 3; // 68020 with FPU
else if (CPUType >= 2)
cpu_level = 2; // 68020
else if (CPUType == 1)
cpu_level = 1;
}
struct cputbl *tbl = (
cpu_level == 4 ? op_smalltbl_0_ff
: cpu_level == 3 ? op_smalltbl_1_ff
: cpu_level == 2 ? op_smalltbl_2_ff
: cpu_level == 1 ? op_smalltbl_3_ff
: op_smalltbl_4_ff);
for (opcode = 0; opcode < 65536; opcode++)
cpufunctbl[cft_map (opcode)] = op_illg_1;
for (i = 0; tbl[i].handler != NULL; i++) {
if (! tbl[i].specific)
cpufunctbl[cft_map (tbl[i].opcode)] = tbl[i].handler;
}
for (opcode = 0; opcode < 65536; opcode++) {
cpuop_func *f;
if (table68k[opcode].mnemo == i_ILLG || table68k[opcode].clev > cpu_level)
continue;
if (table68k[opcode].handler != -1) {
f = cpufunctbl[cft_map (table68k[opcode].handler)];
if (f == op_illg_1)
abort();
cpufunctbl[cft_map (opcode)] = f;
}
}
for (i = 0; tbl[i].handler != NULL; i++) {
if (tbl[i].specific)
cpufunctbl[cft_map (tbl[i].opcode)] = tbl[i].handler;
}
}
void init_m68k (void)
{
int i;
for (i = 0 ; i < 256 ; i++) {
int j;
for (j = 0 ; j < 8 ; j++) {
if (i & (1 << j)) break;
}
movem_index1[i] = j;
movem_index2[i] = 7-j;
movem_next[i] = i & (~(1 << j));
}
#if COUNT_INSTRS
{
FILE *f = fopen (icountfilename (), "r");
memset (instrcount, 0, sizeof instrcount);
if (f) {
uae_u32 opcode, count, total;
char name[20];
write_log ("Reading instruction count file...\n");
fscanf (f, "Total: %lu\n", &total);
while (fscanf (f, "%lx: %lu %s\n", &opcode, &count, name) == 3) {
instrcount[opcode] = count;
}
fclose(f);
}
}
#endif
read_table68k ();
do_merges ();
build_cpufunctbl ();
#if defined(ENABLE_EXCLUSIVE_SPCFLAGS) && !defined(HAVE_HARDWARE_LOCKS)
spcflags_lock = B2_create_mutex();
#endif
fpu_init(CPUType == 4);
}
void exit_m68k (void)
{
fpu_exit ();
#if defined(ENABLE_EXCLUSIVE_SPCFLAGS) && !defined(HAVE_HARDWARE_LOCKS)
B2_delete_mutex(spcflags_lock);
#endif
}
struct regstruct regs, lastint_regs;
static struct regstruct regs_backup[16];
static int backup_pointer = 0;
static long int m68kpc_offset;
int lastint_no;
#if REAL_ADDRESSING || DIRECT_ADDRESSING
#define get_ibyte_1(o) get_byte(get_virtual_address(regs.pc_p) + (o) + 1)
#define get_iword_1(o) get_word(get_virtual_address(regs.pc_p) + (o))
#define get_ilong_1(o) get_long(get_virtual_address(regs.pc_p) + (o))
#else
#define get_ibyte_1(o) get_byte(regs.pc + (regs.pc_p - regs.pc_oldp) + (o) + 1)
#define get_iword_1(o) get_word(regs.pc + (regs.pc_p - regs.pc_oldp) + (o))
#define get_ilong_1(o) get_long(regs.pc + (regs.pc_p - regs.pc_oldp) + (o))
#endif
uae_s32 ShowEA (int reg, amodes mode, wordsizes size, char *buf)
{
uae_u16 dp;
uae_s8 disp8;
uae_s16 disp16;
int r;
uae_u32 dispreg;
uaecptr addr;
uae_s32 offset = 0;
char buffer[80];
switch (mode){
case Dreg:
sprintf (buffer,"D%d", reg);
break;
case Areg:
sprintf (buffer,"A%d", reg);
break;
case Aind:
sprintf (buffer,"(A%d)", reg);
break;
case Aipi:
sprintf (buffer,"(A%d)+", reg);
break;
case Apdi:
sprintf (buffer,"-(A%d)", reg);
break;
case Ad16:
disp16 = get_iword_1 (m68kpc_offset); m68kpc_offset += 2;
addr = m68k_areg(regs,reg) + (uae_s16)disp16;
sprintf (buffer,"(A%d,$%04x) == $%08lx", reg, disp16 & 0xffff,
(unsigned long)addr);
break;
case Ad8r:
dp = get_iword_1 (m68kpc_offset); m68kpc_offset += 2;
disp8 = dp & 0xFF;
r = (dp & 0x7000) >> 12;
dispreg = dp & 0x8000 ? m68k_areg(regs,r) : m68k_dreg(regs,r);
if (!(dp & 0x800)) dispreg = (uae_s32)(uae_s16)(dispreg);
dispreg <<= (dp >> 9) & 3;
if (dp & 0x100) {
uae_s32 outer = 0, disp = 0;
uae_s32 base = m68k_areg(regs,reg);
char name[10];
sprintf (name,"A%d, ",reg);
if (dp & 0x80) { base = 0; name[0] = 0; }
if (dp & 0x40) dispreg = 0;
if ((dp & 0x30) == 0x20) { disp = (uae_s32)(uae_s16)get_iword_1 (m68kpc_offset); m68kpc_offset += 2; }
if ((dp & 0x30) == 0x30) { disp = get_ilong_1 (m68kpc_offset); m68kpc_offset += 4; }
base += disp;
if ((dp & 0x3) == 0x2) { outer = (uae_s32)(uae_s16)get_iword_1 (m68kpc_offset); m68kpc_offset += 2; }
if ((dp & 0x3) == 0x3) { outer = get_ilong_1 (m68kpc_offset); m68kpc_offset += 4; }
if (!(dp & 4)) base += dispreg;
if (dp & 3) base = get_long (base);
if (dp & 4) base += dispreg;
addr = base + outer;
sprintf (buffer,"(%s%c%d.%c*%d+%d)+%d == $%08lx", name,
dp & 0x8000 ? 'A' : 'D', (int)r, dp & 0x800 ? 'L' : 'W',
1 << ((dp >> 9) & 3),
disp,outer,
(unsigned long)addr);
} else {
addr = m68k_areg(regs,reg) + (uae_s32)((uae_s8)disp8) + dispreg;
sprintf (buffer,"(A%d, %c%d.%c*%d, $%02x) == $%08lx", reg,
dp & 0x8000 ? 'A' : 'D', (int)r, dp & 0x800 ? 'L' : 'W',
1 << ((dp >> 9) & 3), disp8,
(unsigned long)addr);
}
break;
case PC16:
addr = m68k_getpc () + m68kpc_offset;
disp16 = get_iword_1 (m68kpc_offset); m68kpc_offset += 2;
addr += (uae_s16)disp16;
sprintf (buffer,"(PC,$%04x) == $%08lx", disp16 & 0xffff,(unsigned long)addr);
break;
case PC8r:
addr = m68k_getpc () + m68kpc_offset;
dp = get_iword_1 (m68kpc_offset); m68kpc_offset += 2;
disp8 = dp & 0xFF;
r = (dp & 0x7000) >> 12;
dispreg = dp & 0x8000 ? m68k_areg(regs,r) : m68k_dreg(regs,r);
if (!(dp & 0x800)) dispreg = (uae_s32)(uae_s16)(dispreg);
dispreg <<= (dp >> 9) & 3;
if (dp & 0x100) {
uae_s32 outer = 0,disp = 0;
uae_s32 base = addr;
char name[10];
sprintf (name,"PC, ");
if (dp & 0x80) { base = 0; name[0] = 0; }
if (dp & 0x40) dispreg = 0;
if ((dp & 0x30) == 0x20) { disp = (uae_s32)(uae_s16)get_iword_1 (m68kpc_offset); m68kpc_offset += 2; }
if ((dp & 0x30) == 0x30) { disp = get_ilong_1 (m68kpc_offset); m68kpc_offset += 4; }
base += disp;
if ((dp & 0x3) == 0x2) { outer = (uae_s32)(uae_s16)get_iword_1 (m68kpc_offset); m68kpc_offset += 2; }
if ((dp & 0x3) == 0x3) { outer = get_ilong_1 (m68kpc_offset); m68kpc_offset += 4; }
if (!(dp & 4)) base += dispreg;
if (dp & 3) base = get_long (base);
if (dp & 4) base += dispreg;
addr = base + outer;
sprintf (buffer,"(%s%c%d.%c*%d+%d)+%d == $%08lx", name,
dp & 0x8000 ? 'A' : 'D', (int)r, dp & 0x800 ? 'L' : 'W',
1 << ((dp >> 9) & 3),
disp,outer,
(unsigned long)addr);
} else {
addr += (uae_s32)((uae_s8)disp8) + dispreg;
sprintf (buffer,"(PC, %c%d.%c*%d, $%02x) == $%08lx", dp & 0x8000 ? 'A' : 'D',
(int)r, dp & 0x800 ? 'L' : 'W', 1 << ((dp >> 9) & 3),
disp8, (unsigned long)addr);
}
break;
case absw:
sprintf (buffer,"$%08lx", (unsigned long)(uae_s32)(uae_s16)get_iword_1 (m68kpc_offset));
m68kpc_offset += 2;
break;
case absl:
sprintf (buffer,"$%08lx", (unsigned long)get_ilong_1 (m68kpc_offset));
m68kpc_offset += 4;
break;
case imm:
switch (size){
case sz_byte:
sprintf (buffer,"#$%02x", (unsigned int)(get_iword_1 (m68kpc_offset) & 0xff));
m68kpc_offset += 2;
break;
case sz_word:
sprintf (buffer,"#$%04x", (unsigned int)(get_iword_1 (m68kpc_offset) & 0xffff));
m68kpc_offset += 2;
break;
case sz_long:
sprintf (buffer,"#$%08lx", (unsigned long)(get_ilong_1 (m68kpc_offset)));
m68kpc_offset += 4;
break;
default:
break;
}
break;
case imm0:
offset = (uae_s32)(uae_s8)get_iword_1 (m68kpc_offset);
m68kpc_offset += 2;
sprintf (buffer,"#$%02x", (unsigned int)(offset & 0xff));
break;
case imm1:
offset = (uae_s32)(uae_s16)get_iword_1 (m68kpc_offset);
m68kpc_offset += 2;
sprintf (buffer,"#$%04x", (unsigned int)(offset & 0xffff));
break;
case imm2:
offset = (uae_s32)get_ilong_1 (m68kpc_offset);
m68kpc_offset += 4;
sprintf (buffer,"#$%08lx", (unsigned long)offset);
break;
case immi:
offset = (uae_s32)(uae_s8)(reg & 0xff);
sprintf (buffer,"#$%08lx", (unsigned long)offset);
break;
default:
break;
}
if (buf == 0)
printf ("%s", buffer);
else
strcat (buf, buffer);
return offset;
}
/* The plan is that this will take over the job of exception 3 handling -
* the CPU emulation functions will just do a longjmp to m68k_go whenever
* they hit an odd address. */
static int verify_ea (int reg, amodes mode, wordsizes size, uae_u32 *val)
{
uae_u16 dp;
uae_s8 disp8;
uae_s16 disp16;
int r;
uae_u32 dispreg;
uaecptr addr;
uae_s32 offset = 0;
switch (mode){
case Dreg:
*val = m68k_dreg (regs, reg);
return 1;
case Areg:
*val = m68k_areg (regs, reg);
return 1;
case Aind:
case Aipi:
addr = m68k_areg (regs, reg);
break;
case Apdi:
addr = m68k_areg (regs, reg);
break;
case Ad16:
disp16 = get_iword_1 (m68kpc_offset); m68kpc_offset += 2;
addr = m68k_areg(regs,reg) + (uae_s16)disp16;
break;
case Ad8r:
addr = m68k_areg (regs, reg);
d8r_common:
dp = get_iword_1 (m68kpc_offset); m68kpc_offset += 2;
disp8 = dp & 0xFF;
r = (dp & 0x7000) >> 12;
dispreg = dp & 0x8000 ? m68k_areg(regs,r) : m68k_dreg(regs,r);
if (!(dp & 0x800)) dispreg = (uae_s32)(uae_s16)(dispreg);
dispreg <<= (dp >> 9) & 3;
if (dp & 0x100) {
uae_s32 outer = 0, disp = 0;
uae_s32 base = addr;
if (dp & 0x80) base = 0;
if (dp & 0x40) dispreg = 0;
if ((dp & 0x30) == 0x20) { disp = (uae_s32)(uae_s16)get_iword_1 (m68kpc_offset); m68kpc_offset += 2; }
if ((dp & 0x30) == 0x30) { disp = get_ilong_1 (m68kpc_offset); m68kpc_offset += 4; }
base += disp;
if ((dp & 0x3) == 0x2) { outer = (uae_s32)(uae_s16)get_iword_1 (m68kpc_offset); m68kpc_offset += 2; }
if ((dp & 0x3) == 0x3) { outer = get_ilong_1 (m68kpc_offset); m68kpc_offset += 4; }
if (!(dp & 4)) base += dispreg;
if (dp & 3) base = get_long (base);
if (dp & 4) base += dispreg;
addr = base + outer;
} else {
addr += (uae_s32)((uae_s8)disp8) + dispreg;
}
break;
case PC16:
addr = m68k_getpc () + m68kpc_offset;
disp16 = get_iword_1 (m68kpc_offset); m68kpc_offset += 2;
addr += (uae_s16)disp16;
break;
case PC8r:
addr = m68k_getpc () + m68kpc_offset;
goto d8r_common;
case absw:
addr = (uae_s32)(uae_s16)get_iword_1 (m68kpc_offset);
m68kpc_offset += 2;
break;
case absl:
addr = get_ilong_1 (m68kpc_offset);
m68kpc_offset += 4;
break;
case imm:
switch (size){
case sz_byte:
*val = get_iword_1 (m68kpc_offset) & 0xff;
m68kpc_offset += 2;
break;
case sz_word:
*val = get_iword_1 (m68kpc_offset) & 0xffff;
m68kpc_offset += 2;
break;
case sz_long:
*val = get_ilong_1 (m68kpc_offset);
m68kpc_offset += 4;
break;
default:
break;
}
return 1;
case imm0:
*val = (uae_s32)(uae_s8)get_iword_1 (m68kpc_offset);
m68kpc_offset += 2;
return 1;
case imm1:
*val = (uae_s32)(uae_s16)get_iword_1 (m68kpc_offset);
m68kpc_offset += 2;
return 1;
case imm2:
*val = get_ilong_1 (m68kpc_offset);
m68kpc_offset += 4;
return 1;
case immi:
*val = (uae_s32)(uae_s8)(reg & 0xff);
return 1;
default:
addr = 0;
break;
}
if ((addr & 1) == 0)
return 1;
last_addr_for_exception_3 = m68k_getpc () + m68kpc_offset;
last_fault_for_exception_3 = addr;
return 0;
}
uae_u32 get_disp_ea_020 (uae_u32 base, uae_u32 dp)
{
int reg = (dp >> 12) & 15;
uae_s32 regd = regs.regs[reg];
if ((dp & 0x800) == 0)
regd = (uae_s32)(uae_s16)regd;
regd <<= (dp >> 9) & 3;
if (dp & 0x100) {
uae_s32 outer = 0;
if (dp & 0x80) base = 0;
if (dp & 0x40) regd = 0;
if ((dp & 0x30) == 0x20) base += (uae_s32)(uae_s16)next_iword();
if ((dp & 0x30) == 0x30) base += next_ilong();
if ((dp & 0x3) == 0x2) outer = (uae_s32)(uae_s16)next_iword();
if ((dp & 0x3) == 0x3) outer = next_ilong();
if ((dp & 0x4) == 0) base += regd;
if (dp & 0x3) base = get_long (base);
if (dp & 0x4) base += regd;
return base + outer;
} else {
return base + (uae_s32)((uae_s8)dp) + regd;
}
}
uae_u32 get_disp_ea_000 (uae_u32 base, uae_u32 dp)
{
int reg = (dp >> 12) & 15;
uae_s32 regd = regs.regs[reg];
#if 1
if ((dp & 0x800) == 0)
regd = (uae_s32)(uae_s16)regd;
return base + (uae_s8)dp + regd;
#else
/* Branch-free code... benchmark this again now that
* things are no longer inline. */
uae_s32 regd16;
uae_u32 mask;
mask = ((dp & 0x800) >> 11) - 1;
regd16 = (uae_s32)(uae_s16)regd;
regd16 &= mask;
mask = ~mask;
base += (uae_s8)dp;
regd &= mask;
regd |= regd16;
return base + regd;
#endif
}
void MakeSR (void)
{
#if 0
assert((regs.t1 & 1) == regs.t1);
assert((regs.t0 & 1) == regs.t0);
assert((regs.s & 1) == regs.s);
assert((regs.m & 1) == regs.m);
assert((XFLG & 1) == XFLG);
assert((NFLG & 1) == NFLG);
assert((ZFLG & 1) == ZFLG);
assert((VFLG & 1) == VFLG);
assert((CFLG & 1) == CFLG);
#endif
regs.sr = ((regs.t1 << 15) | (regs.t0 << 14)
| (regs.s << 13) | (regs.m << 12) | (regs.intmask << 8)
| (GET_XFLG << 4) | (GET_NFLG << 3) | (GET_ZFLG << 2) | (GET_VFLG << 1)
| GET_CFLG);
}
void MakeFromSR (void)
{
int oldm = regs.m;
int olds = regs.s;
regs.t1 = (regs.sr >> 15) & 1;
regs.t0 = (regs.sr >> 14) & 1;
regs.s = (regs.sr >> 13) & 1;
regs.m = (regs.sr >> 12) & 1;
regs.intmask = (regs.sr >> 8) & 7;
SET_XFLG ((regs.sr >> 4) & 1);
SET_NFLG ((regs.sr >> 3) & 1);
SET_ZFLG ((regs.sr >> 2) & 1);
SET_VFLG ((regs.sr >> 1) & 1);
SET_CFLG (regs.sr & 1);
if (CPUType >= 2) {
if (olds != regs.s) {
if (olds) {
if (oldm)
regs.msp = m68k_areg(regs, 7);
else
regs.isp = m68k_areg(regs, 7);
m68k_areg(regs, 7) = regs.usp;
} else {
regs.usp = m68k_areg(regs, 7);
m68k_areg(regs, 7) = regs.m ? regs.msp : regs.isp;
}
} else if (olds && oldm != regs.m) {
if (oldm) {
regs.msp = m68k_areg(regs, 7);
m68k_areg(regs, 7) = regs.isp;
} else {
regs.isp = m68k_areg(regs, 7);
m68k_areg(regs, 7) = regs.msp;
}
}
} else {
if (olds != regs.s) {
if (olds) {
regs.isp = m68k_areg(regs, 7);
m68k_areg(regs, 7) = regs.usp;
} else {
regs.usp = m68k_areg(regs, 7);
m68k_areg(regs, 7) = regs.isp;
}
}
}
SPCFLAGS_SET( SPCFLAG_INT );
if (regs.t1 || regs.t0)
SPCFLAGS_SET( SPCFLAG_TRACE );
else
/* Keep SPCFLAG_DOTRACE, we still want a trace exception for
SR-modifying instructions (including STOP). */
SPCFLAGS_CLEAR( SPCFLAG_TRACE );
}
void Exception(int nr, uaecptr oldpc)
{
uae_u32 currpc = m68k_getpc ();
MakeSR();
if (!regs.s) {
regs.usp = m68k_areg(regs, 7);
if (CPUType >= 2)
m68k_areg(regs, 7) = regs.m ? regs.msp : regs.isp;
else
m68k_areg(regs, 7) = regs.isp;
regs.s = 1;
}
if (CPUType > 0) {
if (nr == 2 || nr == 3) {
int i;
/* @@@ this is probably wrong (?) */
for (i = 0 ; i < 12 ; i++) {
m68k_areg(regs, 7) -= 2;
put_word (m68k_areg(regs, 7), 0);
}
m68k_areg(regs, 7) -= 2;
put_word (m68k_areg(regs, 7), 0xa000 + nr * 4);
} else if (nr ==5 || nr == 6 || nr == 7 || nr == 9) {
m68k_areg(regs, 7) -= 4;
put_long (m68k_areg(regs, 7), oldpc);
m68k_areg(regs, 7) -= 2;
put_word (m68k_areg(regs, 7), 0x2000 + nr * 4);
} else if (regs.m && nr >= 24 && nr < 32) {
m68k_areg(regs, 7) -= 2;
put_word (m68k_areg(regs, 7), nr * 4);
m68k_areg(regs, 7) -= 4;
put_long (m68k_areg(regs, 7), currpc);
m68k_areg(regs, 7) -= 2;
put_word (m68k_areg(regs, 7), regs.sr);
regs.sr |= (1 << 13);
regs.msp = m68k_areg(regs, 7);
m68k_areg(regs, 7) = regs.isp;
m68k_areg(regs, 7) -= 2;
put_word (m68k_areg(regs, 7), 0x1000 + nr * 4);
} else {
m68k_areg(regs, 7) -= 2;
put_word (m68k_areg(regs, 7), nr * 4);
}
} else {
if (nr == 2 || nr == 3) {
m68k_areg(regs, 7) -= 12;
/* ??????? */
if (nr == 3) {
put_long (m68k_areg(regs, 7), last_fault_for_exception_3);
put_word (m68k_areg(regs, 7)+4, last_op_for_exception_3);
put_long (m68k_areg(regs, 7)+8, last_addr_for_exception_3);
}
write_log ("Exception!\n");
goto kludge_me_do;
}
}
m68k_areg(regs, 7) -= 4;
put_long (m68k_areg(regs, 7), currpc);
kludge_me_do:
m68k_areg(regs, 7) -= 2;
put_word (m68k_areg(regs, 7), regs.sr);
m68k_setpc (get_long (regs.vbr + 4*nr));
SPCFLAGS_SET( SPCFLAG_JIT_END_COMPILE );
fill_prefetch_0 ();
regs.t1 = regs.t0 = regs.m = 0;
SPCFLAGS_CLEAR( SPCFLAG_TRACE | SPCFLAG_DOTRACE );
}
static void Interrupt(int nr)
{
assert(nr < 8 && nr >= 0);
lastint_regs = regs;
lastint_no = nr;
Exception(nr+24, 0);
regs.intmask = nr;
SPCFLAGS_SET( SPCFLAG_INT );
}
static int caar, cacr, tc, itt0, itt1, dtt0, dtt1, mmusr, urp, srp;
static int movec_illg (int regno)
{
switch (CPUType) {
case 1:
if ((regno & 0x7ff) <= 1)
return 0;
break;
case 2:
case 3:
if ((regno & 0x7ff) <= 2)
return 0;
if (regno == 0x803 || regno == 0x804)
return 0;
break;
case 4:
if ((regno & 0x7ff) <= 7) {
if (regno != 0x802)
return 0;
}
break;
}
return 1;
}
int m68k_move2c (int regno, uae_u32 *regp)
{
if (movec_illg (regno)) {
op_illg (0x4E7B);
return 0;
} else {
switch (regno) {
case 0: regs.sfc = *regp & 7; break;
case 1: regs.dfc = *regp & 7; break;
case 2:
cacr = *regp & (CPUType < 4 ? 0x3 : 0x80008000);
#if USE_JIT
if (CPUType < 4) {
set_cache_state(cacr&1);
if (*regp & 0x08)
flush_icache(1);
}
else {
set_cache_state(cacr&0x8000);
}
#endif
break;
case 3: tc = *regp & 0xc000; break;
case 4: itt0 = *regp & 0xffffe364; break;
case 5: itt1 = *regp & 0xffffe364; break;
case 6: dtt0 = *regp & 0xffffe364; break;
case 7: dtt1 = *regp & 0xffffe364; break;
case 0x800: regs.usp = *regp; break;
case 0x801: regs.vbr = *regp; break;
case 0x802: caar = *regp &0xfc; break;
case 0x803: regs.msp = *regp; if (regs.m == 1) m68k_areg(regs, 7) = regs.msp; break;
case 0x804: regs.isp = *regp; if (regs.m == 0) m68k_areg(regs, 7) = regs.isp; break;
case 0x805: mmusr = *regp; break;
case 0x806: urp = *regp; break;
case 0x807: srp = *regp; break;
default:
op_illg (0x4E7B);
return 0;
}
}
return 1;
}
int m68k_movec2 (int regno, uae_u32 *regp)
{
if (movec_illg (regno))
{
op_illg (0x4E7A);
return 0;
} else {
switch (regno) {
case 0: *regp = regs.sfc; break;
case 1: *regp = regs.dfc; break;
case 2: *regp = cacr; break;
case 3: *regp = tc; break;
case 4: *regp = itt0; break;
case 5: *regp = itt1; break;
case 6: *regp = dtt0; break;
case 7: *regp = dtt1; break;
case 0x800: *regp = regs.usp; break;
case 0x801: *regp = regs.vbr; break;
case 0x802: *regp = caar; break;
case 0x803: *regp = regs.m == 1 ? m68k_areg(regs, 7) : regs.msp; break;
case 0x804: *regp = regs.m == 0 ? m68k_areg(regs, 7) : regs.isp; break;
case 0x805: *regp = mmusr; break;
case 0x806: *regp = urp; break;
case 0x807: *regp = srp; break;
default:
op_illg (0x4E7A);
return 0;
}
}
return 1;
}
#if !defined(uae_s64)
static __inline__ int
div_unsigned(uae_u32 src_hi, uae_u32 src_lo, uae_u32 div, uae_u32 *quot, uae_u32 *rem)
{
uae_u32 q = 0, cbit = 0;
int i;
if (div <= src_hi) {
return 1;
}
for (i = 0 ; i < 32 ; i++) {
cbit = src_hi & 0x80000000ul;
src_hi <<= 1;
if (src_lo & 0x80000000ul) src_hi++;
src_lo <<= 1;
q = q << 1;
if (cbit || div <= src_hi) {
q |= 1;
src_hi -= div;
}
}
*quot = q;
*rem = src_hi;
return 0;
}
#endif
void m68k_divl (uae_u32 opcode, uae_u32 src, uae_u16 extra, uaecptr oldpc)
{
#if defined(uae_s64)
if (src == 0) {
Exception (5, oldpc);
return;
}
if (extra & 0x800) {
/* signed variant */
uae_s64 a = (uae_s64)(uae_s32)m68k_dreg(regs, (extra >> 12) & 7);
uae_s64 quot, rem;
if (extra & 0x400) {
a &= 0xffffffffu;
a |= (uae_s64)m68k_dreg(regs, extra & 7) << 32;
}
rem = a % (uae_s64)(uae_s32)src;
quot = a / (uae_s64)(uae_s32)src;
if ((quot & UVAL64(0xffffffff80000000)) != 0
&& (quot & UVAL64(0xffffffff80000000)) != UVAL64(0xffffffff80000000))
{
SET_VFLG (1);
SET_NFLG (1);
SET_CFLG (0);
} else {
if (((uae_s32)rem < 0) != ((uae_s64)a < 0)) rem = -rem;
SET_VFLG (0);
SET_CFLG (0);
SET_ZFLG (((uae_s32)quot) == 0);
SET_NFLG (((uae_s32)quot) < 0);
m68k_dreg(regs, extra & 7) = (uae_u32)rem;
m68k_dreg(regs, (extra >> 12) & 7) = (uae_u32)quot;
}
} else {
/* unsigned */
uae_u64 a = (uae_u64)(uae_u32)m68k_dreg(regs, (extra >> 12) & 7);
uae_u64 quot, rem;
if (extra & 0x400) {
a &= 0xffffffffu;
a |= (uae_u64)m68k_dreg(regs, extra & 7) << 32;
}
rem = a % (uae_u64)src;
quot = a / (uae_u64)src;
if (quot > 0xffffffffu) {
SET_VFLG (1);
SET_NFLG (1);
SET_CFLG (0);
} else {
SET_VFLG (0);
SET_CFLG (0);
SET_ZFLG (((uae_s32)quot) == 0);
SET_NFLG (((uae_s32)quot) < 0);
m68k_dreg(regs, extra & 7) = (uae_u32)rem;
m68k_dreg(regs, (extra >> 12) & 7) = (uae_u32)quot;
}
}
#else
if (src == 0) {
Exception (5, oldpc);
return;
}
if (extra & 0x800) {
/* signed variant */
uae_s32 lo = (uae_s32)m68k_dreg(regs, (extra >> 12) & 7);
uae_s32 hi = lo < 0 ? -1 : 0;
uae_s32 save_high;
uae_u32 quot, rem;
uae_u32 sign;
if (extra & 0x400) {
hi = (uae_s32)m68k_dreg(regs, extra & 7);
}
save_high = hi;
sign = (hi ^ src);
if (hi < 0) {
hi = ~hi;
lo = -lo;
if (lo == 0) hi++;
}
if ((uae_s32)src < 0) src = -src;
if (div_unsigned(hi, lo, src, &quot, &rem) ||
(sign & 0x80000000) ? quot > 0x80000000 : quot > 0x7fffffff) {
SET_VFLG (1);
SET_NFLG (1);
SET_CFLG (0);
} else {
if (sign & 0x80000000) quot = -quot;
if (((uae_s32)rem < 0) != (save_high < 0)) rem = -rem;
SET_VFLG (0);
SET_CFLG (0);
SET_ZFLG (((uae_s32)quot) == 0);
SET_NFLG (((uae_s32)quot) < 0);
m68k_dreg(regs, extra & 7) = rem;
m68k_dreg(regs, (extra >> 12) & 7) = quot;
}
} else {
/* unsigned */
uae_u32 lo = (uae_u32)m68k_dreg(regs, (extra >> 12) & 7);
uae_u32 hi = 0;
uae_u32 quot, rem;
if (extra & 0x400) {
hi = (uae_u32)m68k_dreg(regs, extra & 7);
}
if (div_unsigned(hi, lo, src, &quot, &rem)) {
SET_VFLG (1);
SET_NFLG (1);
SET_CFLG (0);
} else {
SET_VFLG (0);
SET_CFLG (0);
SET_ZFLG (((uae_s32)quot) == 0);
SET_NFLG (((uae_s32)quot) < 0);
m68k_dreg(regs, extra & 7) = rem;
m68k_dreg(regs, (extra >> 12) & 7) = quot;
}
}
#endif
}
#if !defined(uae_s64)
static __inline__ void
mul_unsigned(uae_u32 src1, uae_u32 src2, uae_u32 *dst_hi, uae_u32 *dst_lo)
{
uae_u32 r0 = (src1 & 0xffff) * (src2 & 0xffff);
uae_u32 r1 = ((src1 >> 16) & 0xffff) * (src2 & 0xffff);
uae_u32 r2 = (src1 & 0xffff) * ((src2 >> 16) & 0xffff);
uae_u32 r3 = ((src1 >> 16) & 0xffff) * ((src2 >> 16) & 0xffff);
uae_u32 lo;
lo = r0 + ((r1 << 16) & 0xffff0000ul);
if (lo < r0) r3++;
r0 = lo;
lo = r0 + ((r2 << 16) & 0xffff0000ul);
if (lo < r0) r3++;
r3 += ((r1 >> 16) & 0xffff) + ((r2 >> 16) & 0xffff);
*dst_lo = lo;
*dst_hi = r3;
}
#endif
void m68k_mull (uae_u32 opcode, uae_u32 src, uae_u16 extra)
{
#if defined(uae_s64)
if (extra & 0x800) {
/* signed variant */
uae_s64 a = (uae_s64)(uae_s32)m68k_dreg(regs, (extra >> 12) & 7);
a *= (uae_s64)(uae_s32)src;
SET_VFLG (0);
SET_CFLG (0);
SET_ZFLG (a == 0);
SET_NFLG (a < 0);
if (extra & 0x400)
m68k_dreg(regs, extra & 7) = a >> 32;
else if ((a & UVAL64(0xffffffff80000000)) != 0
&& (a & UVAL64(0xffffffff80000000)) != UVAL64(0xffffffff80000000))
{
SET_VFLG (1);
}
m68k_dreg(regs, (extra >> 12) & 7) = (uae_u32)a;
} else {
/* unsigned */
uae_u64 a = (uae_u64)(uae_u32)m68k_dreg(regs, (extra >> 12) & 7);
a *= (uae_u64)src;
SET_VFLG (0);
SET_CFLG (0);
SET_ZFLG (a == 0);
SET_NFLG (((uae_s64)a) < 0);
if (extra & 0x400)
m68k_dreg(regs, extra & 7) = a >> 32;
else if ((a & UVAL64(0xffffffff00000000)) != 0) {
SET_VFLG (1);
}
m68k_dreg(regs, (extra >> 12) & 7) = (uae_u32)a;
}
#else
if (extra & 0x800) {
/* signed variant */
uae_s32 src1,src2;
uae_u32 dst_lo,dst_hi;
uae_u32 sign;
src1 = (uae_s32)src;
src2 = (uae_s32)m68k_dreg(regs, (extra >> 12) & 7);
sign = (src1 ^ src2);
if (src1 < 0) src1 = -src1;
if (src2 < 0) src2 = -src2;
mul_unsigned((uae_u32)src1,(uae_u32)src2,&dst_hi,&dst_lo);
if (sign & 0x80000000) {
dst_hi = ~dst_hi;
dst_lo = -dst_lo;
if (dst_lo == 0) dst_hi++;
}
SET_VFLG (0);
SET_CFLG (0);
SET_ZFLG (dst_hi == 0 && dst_lo == 0);
SET_NFLG (((uae_s32)dst_hi) < 0);
if (extra & 0x400)
m68k_dreg(regs, extra & 7) = dst_hi;
else if ((dst_hi != 0 || (dst_lo & 0x80000000) != 0)
&& ((dst_hi & 0xffffffff) != 0xffffffff
|| (dst_lo & 0x80000000) != 0x80000000))
{
SET_VFLG (1);
}
m68k_dreg(regs, (extra >> 12) & 7) = dst_lo;
} else {
/* unsigned */
uae_u32 dst_lo,dst_hi;
mul_unsigned(src,(uae_u32)m68k_dreg(regs, (extra >> 12) & 7),&dst_hi,&dst_lo);
SET_VFLG (0);
SET_CFLG (0);
SET_ZFLG (dst_hi == 0 && dst_lo == 0);
SET_NFLG (((uae_s32)dst_hi) < 0);
if (extra & 0x400)
m68k_dreg(regs, extra & 7) = dst_hi;
else if (dst_hi != 0) {
SET_VFLG (1);
}
m68k_dreg(regs, (extra >> 12) & 7) = dst_lo;
}
#endif
}
static const char* ccnames[] =
{ "T ","F ","HI","LS","CC","CS","NE","EQ",
"VC","VS","PL","MI","GE","LT","GT","LE" };
// If value is greater than zero, this means we are still processing an EmulOp
// because the counter is incremented only in m68k_execute(), i.e. interpretive
// execution only
static int m68k_execute_depth = 0;
void m68k_reset (void)
{
m68k_areg (regs, 7) = 0x2000;
m68k_setpc (ROMBaseMac + 0x2a);
fill_prefetch_0 ();
regs.s = 1;
regs.m = 0;
regs.stopped = 0;
regs.t1 = 0;
regs.t0 = 0;
SET_ZFLG (0);
SET_XFLG (0);
SET_CFLG (0);
SET_VFLG (0);
SET_NFLG (0);
SPCFLAGS_INIT( 0 );
regs.intmask = 7;
regs.vbr = regs.sfc = regs.dfc = 0;
fpu_reset();
#if FLIGHT_RECORDER
log_ptr = 0;
memset(log, 0, sizeof(log));
#endif
#if ENABLE_MON
static bool first_time = true;
if (first_time) {
first_time = false;
mon_add_command("regs", dump_regs, "regs Dump m68k emulator registers\n");
#if FLIGHT_RECORDER
// Install "log" command in mon
mon_add_command("log", dump_log, "log Dump m68k emulation log\n");
#endif
}
#endif
}
void m68k_emulop_return(void)
{
SPCFLAGS_SET( SPCFLAG_BRK );
quit_program = true;
}
void m68k_emulop(uae_u32 opcode)
{
struct M68kRegisters r;
int i;
for (i=0; i<8; i++) {
r.d[i] = m68k_dreg(regs, i);
r.a[i] = m68k_areg(regs, i);
}
MakeSR();
r.sr = regs.sr;
EmulOp(opcode, &r);
for (i=0; i<8; i++) {
m68k_dreg(regs, i) = r.d[i];
m68k_areg(regs, i) = r.a[i];
}
regs.sr = r.sr;
MakeFromSR();
}
void REGPARAM2 op_illg (uae_u32 opcode)
{
uaecptr pc = m68k_getpc ();
if ((opcode & 0xF000) == 0xA000) {
Exception(0xA,0);
return;
}
if ((opcode & 0xF000) == 0xF000) {
Exception(0xB,0);
return;
}
write_log ("Illegal instruction: %04x at %08x\n", opcode, pc);
#if USE_JIT && JIT_DEBUG
compiler_dumpstate();
#endif
Exception (4,0);
return;
}
void mmu_op(uae_u32 opcode, uae_u16 extra)
{
if ((opcode & 0xFE0) == 0x0500) {
/* PFLUSH */
mmusr = 0;
} else if ((opcode & 0x0FD8) == 0x548) {
/* PTEST */
} else
op_illg (opcode);
}
static int n_insns = 0, n_spcinsns = 0;
static uaecptr last_trace_ad = 0;
static void do_trace (void)
{
if (regs.t0 && CPUType >= 2) {
uae_u16 opcode;
/* should also include TRAP, CHK, SR modification FPcc */
/* probably never used so why bother */
/* We can afford this to be inefficient... */
m68k_setpc (m68k_getpc ());
fill_prefetch_0 ();
opcode = get_word(m68k_getpc());
if (opcode == 0x4e72 /* RTE */
|| opcode == 0x4e74 /* RTD */
|| opcode == 0x4e75 /* RTS */
|| opcode == 0x4e77 /* RTR */
|| opcode == 0x4e76 /* TRAPV */
|| (opcode & 0xffc0) == 0x4e80 /* JSR */
|| (opcode & 0xffc0) == 0x4ec0 /* JMP */
|| (opcode & 0xff00) == 0x6100 /* BSR */
|| ((opcode & 0xf000) == 0x6000 /* Bcc */
&& cctrue((opcode >> 8) & 0xf))
|| ((opcode & 0xf0f0) == 0x5050 /* DBcc */
&& !cctrue((opcode >> 8) & 0xf)
&& (uae_s16)m68k_dreg(regs, opcode & 7) != 0))
{
last_trace_ad = m68k_getpc ();
SPCFLAGS_CLEAR( SPCFLAG_TRACE );
SPCFLAGS_SET( SPCFLAG_DOTRACE );
}
} else if (regs.t1) {
last_trace_ad = m68k_getpc ();
SPCFLAGS_CLEAR( SPCFLAG_TRACE );
SPCFLAGS_SET( SPCFLAG_DOTRACE );
}
}
int m68k_do_specialties (void)
{
#if USE_JIT
// Block was compiled
SPCFLAGS_CLEAR( SPCFLAG_JIT_END_COMPILE );
// Retain the request to get out of compiled code until
// we reached the toplevel execution, i.e. the one that
// can compile then run compiled code. This also means
// we processed all (nested) EmulOps
if ((m68k_execute_depth == 0) && SPCFLAGS_TEST( SPCFLAG_JIT_EXEC_RETURN ))
SPCFLAGS_CLEAR( SPCFLAG_JIT_EXEC_RETURN );
#endif
if (SPCFLAGS_TEST( SPCFLAG_DOTRACE )) {
Exception (9,last_trace_ad);
}
while (SPCFLAGS_TEST( SPCFLAG_STOP )) {
if (SPCFLAGS_TEST( SPCFLAG_INT | SPCFLAG_DOINT )){
SPCFLAGS_CLEAR( SPCFLAG_INT | SPCFLAG_DOINT );
int intr = intlev ();
if (intr != -1 && intr > regs.intmask) {
Interrupt (intr);
regs.stopped = 0;
SPCFLAGS_CLEAR( SPCFLAG_STOP );
}
}
}
if (SPCFLAGS_TEST( SPCFLAG_TRACE ))
do_trace ();
if (SPCFLAGS_TEST( SPCFLAG_DOINT )) {
SPCFLAGS_CLEAR( SPCFLAG_DOINT );
int intr = intlev ();
if (intr != -1 && intr > regs.intmask) {
Interrupt (intr);
regs.stopped = 0;
}
}
if (SPCFLAGS_TEST( SPCFLAG_INT )) {
SPCFLAGS_CLEAR( SPCFLAG_INT );
SPCFLAGS_SET( SPCFLAG_DOINT );
}
if (SPCFLAGS_TEST( SPCFLAG_BRK )) {
SPCFLAGS_CLEAR( SPCFLAG_BRK );
return 1;
}
return 0;
}
void m68k_do_execute (void)
{
for (;;) {
uae_u32 opcode = GET_OPCODE;
#if FLIGHT_RECORDER
m68k_record_step(m68k_getpc());
#endif
(*cpufunctbl[opcode])(opcode);
cpu_check_ticks();
if (SPCFLAGS_TEST(SPCFLAG_ALL_BUT_EXEC_RETURN)) {
if (m68k_do_specialties())
return;
}
}
}
void m68k_execute (void)
{
#if USE_JIT
++m68k_execute_depth;
#endif
for (;;) {
if (quit_program)
break;
m68k_do_execute();
}
#if USE_JIT
--m68k_execute_depth;
#endif
}
static void m68k_verify (uaecptr addr, uaecptr *nextpc)
{
uae_u32 opcode, val;
struct instr *dp;
opcode = get_iword_1(0);
last_op_for_exception_3 = opcode;
m68kpc_offset = 2;
if (cpufunctbl[cft_map (opcode)] == op_illg_1) {
opcode = 0x4AFC;
}
dp = table68k + opcode;
if (dp->suse) {
if (!verify_ea (dp->sreg, (amodes)dp->smode, (wordsizes)dp->size, &val)) {
Exception (3, 0);
return;
}
}
if (dp->duse) {
if (!verify_ea (dp->dreg, (amodes)dp->dmode, (wordsizes)dp->size, &val)) {
Exception (3, 0);
return;
}
}
}
void m68k_disasm (uaecptr addr, uaecptr *nextpc, int cnt)
{
uaecptr newpc = 0;
m68kpc_offset = addr - m68k_getpc ();
while (cnt-- > 0) {
char instrname[20],*ccpt;
int opwords;
uae_u32 opcode;
struct mnemolookup *lookup;
struct instr *dp;
printf ("%08lx: ", m68k_getpc () + m68kpc_offset);
for (opwords = 0; opwords < 5; opwords++){
printf ("%04x ", get_iword_1 (m68kpc_offset + opwords*2));
}
opcode = get_iword_1 (m68kpc_offset);
m68kpc_offset += 2;
if (cpufunctbl[cft_map (opcode)] == op_illg_1) {
opcode = 0x4AFC;
}
dp = table68k + opcode;
for (lookup = lookuptab;lookup->mnemo != dp->mnemo; lookup++)
;
strcpy (instrname, lookup->name);
ccpt = strstr (instrname, "cc");
if (ccpt != 0) {
strncpy (ccpt, ccnames[dp->cc], 2);
}
printf ("%s", instrname);
switch (dp->size){
case sz_byte: printf (".B "); break;
case sz_word: printf (".W "); break;
case sz_long: printf (".L "); break;
default: printf (" "); break;
}
if (dp->suse) {
newpc = m68k_getpc () + m68kpc_offset;
newpc += ShowEA (dp->sreg, (amodes)dp->smode, (wordsizes)dp->size, 0);
}
if (dp->suse && dp->duse)
printf (",");
if (dp->duse) {
newpc = m68k_getpc () + m68kpc_offset;
newpc += ShowEA (dp->dreg, (amodes)dp->dmode, (wordsizes)dp->size, 0);
}
if (ccpt != 0) {
if (cctrue(dp->cc))
printf (" == %08x (TRUE)", newpc);
else
printf (" == %08x (FALSE)", newpc);
} else if ((opcode & 0xff00) == 0x6100) /* BSR */
printf (" == %08x", newpc);
printf ("\n");
}
if (nextpc)
*nextpc = m68k_getpc () + m68kpc_offset;
}
void m68k_dumpstate (uaecptr *nextpc)
{
int i;
for (i = 0; i < 8; i++){
printf ("D%d: %08x ", i, m68k_dreg(regs, i));
if ((i & 3) == 3) printf ("\n");
}
for (i = 0; i < 8; i++){
printf ("A%d: %08x ", i, m68k_areg(regs, i));
if ((i & 3) == 3) printf ("\n");
}
if (regs.s == 0) regs.usp = m68k_areg(regs, 7);
if (regs.s && regs.m) regs.msp = m68k_areg(regs, 7);
if (regs.s && regs.m == 0) regs.isp = m68k_areg(regs, 7);
printf ("USP=%08x ISP=%08x MSP=%08x VBR=%08x\n",
regs.usp,regs.isp,regs.msp,regs.vbr);
printf ("T=%d%d S=%d M=%d X=%ld N=%ld Z=%ld V=%ld C=%ld IMASK=%d\n",
regs.t1, regs.t0, regs.s, regs.m,
GET_XFLG, GET_NFLG, GET_ZFLG, GET_VFLG, GET_CFLG, regs.intmask);
fpu_dump_registers();
fpu_dump_flags();
m68k_disasm(m68k_getpc (), nextpc, 1);
if (nextpc)
printf ("next PC: %08x\n", *nextpc);
}
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