attotime device_execute_interface::local_time() const
{
// if we're active, add in the time from the current slice
if (executing())
{
assert(m_cycles_running >= *m_icountptr);
int cycles = m_cycles_running - *m_icountptr;
return m_localtime + cycles_to_attotime(cycles);
}
return m_localtime;
}
void sh2_device::sh2_timer_activate()
{
int max_delta = 0xfffff;
UINT16 frc;
m_timer->adjust(attotime::never);
frc = m_frc;
if(!(m_m[4] & OCFA)) {
UINT16 delta = m_ocra - frc;
if(delta < max_delta)
max_delta = delta;
}
if(!(m_m[4] & OCFB) && (m_ocra <= m_ocrb || !(m_m[4] & 0x010000))) {
UINT16 delta = m_ocrb - frc;
if(delta < max_delta)
max_delta = delta;
}
if(!(m_m[4] & OVF) && !(m_m[4] & 0x010000)) {
int delta = 0x10000 - frc;
if(delta < max_delta)
max_delta = delta;
}
if(max_delta != 0xfffff) {
int divider = div_tab[(m_m[5] >> 8) & 3];
if(divider) {
max_delta <<= divider;
m_frc_base = total_cycles();
m_timer->adjust(cycles_to_attotime(max_delta));
} else {
logerror("SH2.%s: Timer event in %d cycles of external clock", tag(), max_delta);
}
}
