RaySollium99/picodrive
1
0
Fork 0
mirror of https://github.com/RaySollium99/picodrive.git synced 2025-09-05 07:17:45 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

32x, speed improvement

Browse source
This commit is contained in:
kub 2019-10-11 00:56:26 +02:00
parent 7869213d35
commit 86c16afd45
2 changed files with 28 additions and 17 deletions
Download patch file Download diff file Expand all files Collapse all files

28
pico/32x/32x.c
View file

@ -426,7 +426,7 @@ void p32x_sync_other_sh2(SH2 *sh2, unsigned int m68k_target)
}
#define STEP_LS 24
#define STEP_N 488 // one line
#define STEP_N 528 // at least one line (488)
#define sync_sh2s_normal p32x_sync_sh2s
//#define sync_sh2s_lockstep p32x_sync_sh2s
@ -434,7 +434,7 @@ void p32x_sync_other_sh2(SH2 *sh2, unsigned int m68k_target)
/* most timing is in 68k clock */
void sync_sh2s_normal(unsigned int m68k_target)
{
unsigned int now, target, timer_cycles;
unsigned int now, target, next, timer_cycles;
int cycles;
elprintf(EL_32X, "sh2 sync to %u", m68k_target);
@ -458,40 +458,44 @@ void sync_sh2s_normal(unsigned int m68k_target)
target = m68k_target;
if (event_time_next && CYCLES_GT(target, event_time_next))
target = event_time_next;
if (CYCLES_GT(target, now + STEP_N))
target = now + STEP_N;
while (CYCLES_GT(target, now))
{
elprintf(EL_32X, "sh2 exec to %u %d,%d/%d, flags %x", target,
target - msh2.m68krcycles_done, target - ssh2.m68krcycles_done,
next = target;
if (CYCLES_GT(target, now + STEP_N))
next = now + STEP_N;
elprintf(EL_32X, "sh2 exec to %u %d,%d/%d, flags %x", next,
next - msh2.m68krcycles_done, next - ssh2.m68krcycles_done,
m68k_target - now, Pico32x.emu_flags);
pprof_start(ssh2);
if (!(ssh2.state & SH2_IDLE_STATES)) {
cycles = target - ssh2.m68krcycles_done;
cycles = next - ssh2.m68krcycles_done;
if (cycles > 0) {
run_sh2(&ssh2, cycles > 20U ? cycles : 20U);
if (event_time_next && CYCLES_GT(target, event_time_next))
target = event_time_next;
if (CYCLES_GT(next, target))
next = target;
}
}
pprof_end(ssh2);
pprof_start(msh2);
if (!(msh2.state & SH2_IDLE_STATES)) {
cycles = target - msh2.m68krcycles_done;
cycles = next - msh2.m68krcycles_done;
if (cycles > 0) {
run_sh2(&msh2, cycles > 20U ? cycles : 20U);
if (event_time_next && CYCLES_GT(target, event_time_next))
target = event_time_next;
if (CYCLES_GT(next, target))
next = target;
}
}
pprof_end(msh2);
now = target;
now = next;
if (!(msh2.state & SH2_IDLE_STATES)) {
if (CYCLES_GT(now, msh2.m68krcycles_done))
now = msh2.m68krcycles_done;
@ -500,6 +504,10 @@ void sync_sh2s_normal(unsigned int m68k_target)
if (CYCLES_GT(now, ssh2.m68krcycles_done))
now = ssh2.m68krcycles_done;
}
if (now - timer_cycles >= STEP_N) {
p32x_timers_do(now - timer_cycles);
timer_cycles = now;
}
}
p32x_timers_do(now - timer_cycles);