RaySollium99/picodrive
1
0
Fork 0
mirror of https://github.com/RaySollium99/picodrive.git synced 2025-10-27 13:38:51 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions

idle loop detection (Cyclone only, with debug stuff)

Browse source 
git-svn-id: file:///home/notaz/opt/svn/PicoDrive@502 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2008-06-29 20:07:34 +00:00
parent d95259bdaa
commit 053fd9b42f
17 changed files with 372 additions and 37 deletions
Download patch file Download diff file Expand all files Collapse all files

125
Pico/Sek.c
View file

@ -193,6 +193,131 @@ PICO_INTERNAL void SekSetRealTAS(int use_real)
#endif
}
/* idle loop detection, not to be used in CD mode */
#ifdef EMU_C68K
#include "cpu/Cyclone/tools/idle.h"
#endif
static int *idledet_addrs = NULL;
static int idledet_count = 0, idledet_bads = 0;
int idledet_start_frame = 0;
static int jump_verify[0x10000];
extern int CycloneJumpTab[];
static unsigned char *rom_verify = NULL;
void SekInitIdleDet(void)
{
void *tmp = realloc(idledet_addrs, 0x200*4);
if (tmp == NULL) {
free(idledet_addrs);
idledet_addrs = NULL;
}
else
idledet_addrs = tmp;
idledet_count = idledet_bads = 0;
idledet_start_frame = Pico.m.frame_count + 360;
memcpy(jump_verify, CycloneJumpTab, 0x10000*4);
rom_verify = realloc(rom_verify, Pico.romsize);
memcpy(rom_verify, Pico.rom, Pico.romsize);
#ifdef EMU_C68K
CycloneInitIdle();
#endif
}
int SekIsIdleCode(unsigned short *dst, int bytes)
{
printf("SekIsIdleCode %04x %i\n", *dst, bytes);
switch (bytes)
{
case 4:
if ( (*dst & 0xfff8) == 0x4a10 || // tst.b ($aX) // where should be no need to wait
(*dst & 0xfff8) == 0x4a28 || // tst.b ($xxxx,a0) // for byte change anywhere
(*dst & 0xff3f) == 0x4a38 || // tst.x ($xxxx.w), tas ($xxxx.w)
(*dst & 0xc1ff) == 0x0038 || // move.x ($xxxx.w), dX
(*dst & 0xf13f) == 0xb038) // cmp.x ($xxxx.w), dX
return 1;
break;
case 6:
if ( ((dst[1] & 0xe0) == 0xe0 && ( // RAM
*dst == 0x4a39 || // tst.b ($xxxxxxxx)
*dst == 0x4a79 || // tst.w ($xxxxxxxx)
*dst == 0x4ab9)) || // tst.l ($xxxxxxxx)
*dst == 0x0838) // btst $X, ($xxxx.w) [6 byte op]
return 1;
break;
case 8:
if ( (dst[2] & 0xe0) == 0xe0 && ( // RAM
*dst == 0x0839 || // btst $X, ($xxxxxxxx.w) [8 byte op]
(*dst & 0xffbf) == 0x0c39)) // cmpi.{b,w} $X, ($xxxxxxxx)
return 1;
break;
case 12:
if ((*dst & 0xf1f8) == 0x3010 && // move.w (aX), dX
(dst[1]&0xf100) == 0x0000 && // arithmetic
(dst[3]&0xf100) == 0x0000) // arithmetic
return 1;
break;
}
return 0;
}
int SekRegisterIdlePatch(unsigned int pc, int oldop, int newop)
{
#ifdef EMU_C68K
pc -= PicoCpuCM68k.membase;
#endif
pc &= ~0xff000000;
elprintf(EL_IDLE, "idle: patch %06x %04x %04x #%i", pc, oldop, newop, idledet_count);
if (pc > Pico.romsize) {
if (++idledet_bads > 128) return 2; // remove detector
return 1; // don't patch
}
if (idledet_count >= 0x200 && (idledet_count & 0x1ff) == 0) {
void *tmp = realloc(idledet_addrs, (idledet_count+0x200)*4);
if (tmp == NULL) return 1;
idledet_addrs = tmp;
}
idledet_addrs[idledet_count++] = pc;
return 0;
}
void SekFinishIdleDet(void)
{
int done_something = idledet_count > 0;
#ifdef EMU_C68K
CycloneFinishIdle();
#endif
while (idledet_count > 0)
{
unsigned short *op = (unsigned short *)&Pico.rom[idledet_addrs[--idledet_count]];
if ((*op & 0xfd00) == 0x7100)
*op &= 0xff, *op |= 0x6600;
else if ((*op & 0xfd00) == 0x7500)
*op &= 0xff, *op |= 0x6700;
else if ((*op & 0xfd00) == 0x7d00)
*op &= 0xff, *op |= 0x6000;
else
elprintf(EL_STATUS|EL_IDLE, "idle: don't know how to restore %04x", *op);
}
if (done_something)
{
int i;
for (i = 0; i < 0x10000; i++)
if (jump_verify[i] != CycloneJumpTab[i])
printf("jumptab corruption @ %04x!\n", i), exit(1);
for (i = 0; i < Pico.romsize; i++)
if (rom_verify[i] != Pico.rom[i])
printf("ROM corruption @ %06x!\n", i), exit(1);
}
}
#if defined(EMU_M68K) && M68K_INSTRUCTION_HOOK == OPT_SPECIFY_HANDLER
static unsigned char op_flags[0x400000/2] = { 0, };
static int atexit_set = 0;