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diexec: don't eat negative cycles with abort_timeslice when icount<0

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This commit is contained in:
hap 2024-11-16 15:33:25 +01:00
parent 2b37fd59cd
commit ea02851fc8
1 changed files with 12 additions and 10 deletions
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22
src/emu/diexec.cpp
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@ -98,12 +98,11 @@ void device_execute_interface::abort_timeslice() noexcept
return;
// swallow the remaining cycles
if (m_icountptr != nullptr)
if (m_icountptr != nullptr && *m_icountptr > 0)
{
int delta = *m_icountptr;
m_cycles_stolen += delta;
m_cycles_running -= delta;
*m_icountptr -= delta;
m_cycles_stolen += *m_icountptr;
m_cycles_running -= *m_icountptr;
*m_icountptr = 0;
}
}
@ -128,7 +127,8 @@ void device_execute_interface::suspend_resume_changed()
void device_execute_interface::suspend(u32 reason, bool eatcycles)
{
if (TEMPLOG) printf("suspend %s (%X)\n", device().tag(), reason);
if (TEMPLOG) printf("suspend %s (%X)\n", device().tag(), reason);
// set the suspend reason and eat cycles flag
m_nextsuspend |= reason;
m_nexteatcycles = eatcycles;
@ -143,7 +143,8 @@ if (TEMPLOG) printf("suspend %s (%X)\n", device().tag(), reason);
void device_execute_interface::resume(u32 reason)
{
if (TEMPLOG) printf("resume %s (%X)\n", device().tag(), reason);
if (TEMPLOG) printf("resume %s (%X)\n", device().tag(), reason);
// clear the suspend reason and eat cycles flag
m_nextsuspend &= ~reason;
suspend_resume_changed();
@ -656,7 +657,7 @@ void device_execute_interface::device_input::set_state_synced(int state, int vec
{
LOG(("set_state_synced('%s',%d,%d,%02x)\n", m_execute->device().tag(), m_linenum, state, vector));
if (TEMPLOG) printf("setline(%s,%d,%d,%d)\n", m_execute->device().tag(), m_linenum, state, (vector == USE_STORED_VECTOR) ? 0 : vector);
if (TEMPLOG) printf("setline(%s,%d,%d,%d)\n", m_execute->device().tag(), m_linenum, state, (vector == USE_STORED_VECTOR) ? 0 : vector);
assert(state == ASSERT_LINE || state == HOLD_LINE || state == CLEAR_LINE);
// if we're full of events, flush the queue and log a message
@ -689,7 +690,8 @@ if (TEMPLOG) printf("setline(%s,%d,%d,%d)\n", m_execute->device().tag(), m_linen
TIMER_CALLBACK_MEMBER(device_execute_interface::device_input::empty_event_queue)
{
if (TEMPLOG) printf("empty_queue(%s,%d,%d)\n", m_execute->device().tag(), m_linenum, m_qindex);
if (TEMPLOG) printf("empty_queue(%s,%d,%d)\n", m_execute->device().tag(), m_linenum, m_qindex);
// loop over all events
for (int curevent = 0; curevent < m_qindex; curevent++)
{
@ -698,7 +700,7 @@ if (TEMPLOG) printf("empty_queue(%s,%d,%d)\n", m_execute->device().tag(), m_line
// set the input line state and vector
m_curstate = input_event & 0xff;
m_curvector = input_event >> 8;
if (TEMPLOG) printf(" (%d,%d)\n", m_curstate, m_curvector);
if (TEMPLOG) printf(" (%d,%d)\n", m_curstate, m_curvector);
assert(m_curstate == ASSERT_LINE || m_curstate == HOLD_LINE || m_curstate == CLEAR_LINE);