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32x, improve poll detection

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This commit is contained in:
kub 2023-06-03 07:49:17 +00:00
parent 805fbe6faa
commit d8a897a6db
4 changed files with 43 additions and 37 deletions
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46
pico/32x/memory.c
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@ -70,7 +70,7 @@ static int m68k_poll_detect(u32 a, u32 cycles, u32 flags)
{
int ret = 0;
// support polling on 2 addresses - seen in Wolfenstein
int match = (a - m68k_poll.addr1 <= 2 || a - m68k_poll.addr2 <= 2);
int match = (a - m68k_poll.addr1 <= 3 || a - m68k_poll.addr2 <= 3);
if (match && cycles - m68k_poll.cycles <= 64 && !SekNotPolling)
{
@ -91,7 +91,7 @@ static int m68k_poll_detect(u32 a, u32 cycles, u32 flags)
m68k_poll.cnt = 0;
if (!match) {
m68k_poll.addr2 = m68k_poll.addr1;
m68k_poll.addr1 = a;
m68k_poll.addr1 = a & ~1;
}
SekNotPolling = 0;
}
@ -100,15 +100,19 @@ static int m68k_poll_detect(u32 a, u32 cycles, u32 flags)
return ret;
}
void p32x_m68k_poll_event(u32 flags)
void p32x_m68k_poll_event(u32 a, u32 flags)
{
if (Pico32x.emu_flags & flags) {
int match = (a - m68k_poll.addr1 <= 3 || a - m68k_poll.addr2 <= 3);
if ((Pico32x.emu_flags & flags) && match) {
elprintf(EL_32X, "m68k poll %02x -> %02x", Pico32x.emu_flags,
Pico32x.emu_flags & ~flags);
Pico32x.emu_flags &= ~flags;
SekSetStop(0);
}
m68k_poll.addr1 = m68k_poll.addr2 = m68k_poll.cnt = 0;
if (!(Pico32x.emu_flags & (P32XF_68KCPOLL|P32XF_68KVPOLL)))
m68k_poll.addr1 = m68k_poll.addr2 = m68k_poll.cnt = 0;
}
void NOINLINE p32x_sh2_poll_detect(u32 a, SH2 *sh2, u32 flags, int maxcnt)
@ -116,10 +120,11 @@ void NOINLINE p32x_sh2_poll_detect(u32 a, SH2 *sh2, u32 flags, int maxcnt)
u32 cycles_done = sh2_cycles_done_t(sh2);
u32 cycles_diff = cycles_done - sh2->poll_cycles;
a &= ~0x20000000;
// reading 2 consecutive 16bit values is probably a 32bit access. detect this
// by checking address (max 2 bytes away) and cycles (max 2 cycles later).
// no polling if more than 20 cycles have passed since last detect call.
if (a - sh2->poll_addr <= 2 && CYCLES_GE(20, cycles_diff)) {
if (a - sh2->poll_addr <= 3 && CYCLES_GE(20, cycles_diff)) {
if (!sh2_not_polling(sh2) && CYCLES_GT(cycles_diff, 2) &&
++sh2->poll_cnt >= maxcnt) {
if (!(sh2->state & flags))
@ -142,15 +147,16 @@ void NOINLINE p32x_sh2_poll_detect(u32 a, SH2 *sh2, u32 flags, int maxcnt)
}
else if (!(sh2->state & (SH2_STATE_CPOLL|SH2_STATE_VPOLL|SH2_STATE_RPOLL))) {
sh2->poll_cnt = 0;
sh2->poll_addr = a;
sh2->poll_addr = a & ~1;
}
sh2->poll_cycles = cycles_done;
sh2_set_polling(sh2);
}
void NOINLINE p32x_sh2_poll_event(SH2 *sh2, u32 flags, u32 m68k_cycles)
void NOINLINE p32x_sh2_poll_event(u32 a, SH2 *sh2, u32 flags, u32 m68k_cycles)
{
if (sh2->state & flags) {
a &= ~0x20000000;
if ((sh2->state & flags) && a - sh2->poll_addr <= 3) {
elprintf_sh2(sh2, EL_32X, "state: %02x->%02x", sh2->state,
sh2->state & ~flags);
@ -518,8 +524,8 @@ static void p32x_reg_write8(u32 a, u32 d)
if (REG8IN16(r, a) != (u8)d) {
REG8IN16(r, a) = d;
p32x_sh2_poll_event(&sh2s[0], SH2_STATE_CPOLL, cycles);
p32x_sh2_poll_event(&sh2s[1], SH2_STATE_CPOLL, cycles);
p32x_sh2_poll_event(a, &sh2s[0], SH2_STATE_CPOLL, cycles);
p32x_sh2_poll_event(a, &sh2s[1], SH2_STATE_CPOLL, cycles);
sh2_poll_write(a & ~1, r[a / 2], cycles, NULL);
}
}
@ -616,8 +622,8 @@ static void p32x_reg_write16(u32 a, u32 d)
if (r[a / 2] != (u16)d) {
r[a / 2] = d;
p32x_sh2_poll_event(&sh2s[0], SH2_STATE_CPOLL, cycles);
p32x_sh2_poll_event(&sh2s[1], SH2_STATE_CPOLL, cycles);
p32x_sh2_poll_event(a, &sh2s[0], SH2_STATE_CPOLL, cycles);
p32x_sh2_poll_event(a, &sh2s[1], SH2_STATE_CPOLL, cycles);
sh2_poll_write(a, (u16)d, cycles, NULL);
}
}
@ -772,7 +778,7 @@ static u32 p32x_sh2reg_read16(u32 a, SH2 *sh2)
case 0x2a/2:
case 0x2c/2:
case 0x2e/2:
p32x_sh2_poll_detect(a, sh2, SH2_STATE_CPOLL, 5);
p32x_sh2_poll_detect(a, sh2, SH2_STATE_CPOLL, 9);
cycles = sh2_cycles_done_m68k(sh2);
sh2s_sync_on_read(sh2, cycles);
return sh2_poll_read(a, r[a / 2], cycles, sh2);
@ -828,7 +834,7 @@ static void p32x_sh2reg_write8(u32 a, u32 d, SH2 *sh2)
if (Pico32x.sh2_regs[4 / 2] != (u8)d) {
unsigned int cycles = sh2_cycles_done_m68k(sh2);
Pico32x.sh2_regs[4 / 2] = d;
p32x_sh2_poll_event(sh2->other_sh2, SH2_STATE_CPOLL, cycles);
p32x_sh2_poll_event(a, sh2->other_sh2, SH2_STATE_CPOLL, cycles);
if (p32x_sh2_ready(sh2->other_sh2, cycles+8))
sh2_end_run(sh2, 4);
sh2_poll_write(a & ~1, d, cycles, sh2);
@ -854,8 +860,8 @@ static void p32x_sh2reg_write8(u32 a, u32 d, SH2 *sh2)
unsigned int cycles = sh2_cycles_done_m68k(sh2);
REG8IN16(r, a) = d;
p32x_m68k_poll_event(P32XF_68KCPOLL);
p32x_sh2_poll_event(sh2->other_sh2, SH2_STATE_CPOLL, cycles);
p32x_m68k_poll_event(a, P32XF_68KCPOLL);
p32x_sh2_poll_event(a, sh2->other_sh2, SH2_STATE_CPOLL, cycles);
if (p32x_sh2_ready(sh2->other_sh2, cycles+8))
sh2_end_run(sh2, 0);
sh2_poll_write(a & ~1, r[a / 2], cycles, sh2);
@ -947,8 +953,8 @@ static void p32x_sh2reg_write16(u32 a, u32 d, SH2 *sh2)
unsigned int cycles = sh2_cycles_done_m68k(sh2);
Pico32x.regs[a / 2] = d;
p32x_m68k_poll_event(P32XF_68KCPOLL);
p32x_sh2_poll_event(sh2->other_sh2, SH2_STATE_CPOLL, cycles);
p32x_m68k_poll_event(a, P32XF_68KCPOLL);
p32x_sh2_poll_event(a, sh2->other_sh2, SH2_STATE_CPOLL, cycles);
if (p32x_sh2_ready(sh2->other_sh2, cycles+8))
sh2_end_run(sh2, 0);
sh2_poll_write(a, d, cycles, sh2);
@ -1579,7 +1585,7 @@ static void sh2_sdram_poll(u32 a, u32 d, SH2 *sh2)
DRC_SAVE_SR(sh2);
cycles = sh2_cycles_done_m68k(sh2);
sh2_poll_write(a, d, cycles, sh2);
p32x_sh2_poll_event(sh2->other_sh2, SH2_STATE_RPOLL, cycles);
p32x_sh2_poll_event(a, sh2->other_sh2, SH2_STATE_RPOLL, cycles);
if (p32x_sh2_ready(sh2->other_sh2, cycles+8))
sh2_end_run(sh2, 0);
DRC_RESTORE_SR(sh2);