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device: round scaled clock to nearest integer

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hap 2025-01-20 20:37:37 +01:00
parent 7dc514fba6
commit da5ba37031
1 changed files with 3 additions and 3 deletions
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6
src/emu/device.cpp
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@ -368,7 +368,7 @@ void device_t::set_unscaled_clock(u32 clock, bool sync_on_new_clock_domain)
return;
m_unscaled_clock = clock;
m_clock = m_unscaled_clock * m_clock_scale;
m_clock = m_unscaled_clock * m_clock_scale + 0.5;
m_attoseconds_per_clock = (m_clock == 0) ? 0 : HZ_TO_ATTOSECONDS(m_clock);
// recalculate all derived clocks
@ -393,7 +393,7 @@ void device_t::set_clock_scale(double clockscale)
return;
m_clock_scale = clockscale;
m_clock = m_unscaled_clock * m_clock_scale;
m_clock = m_unscaled_clock * m_clock_scale + 0.5;
m_attoseconds_per_clock = (m_clock == 0) ? 0 : HZ_TO_ATTOSECONDS(m_clock);
// recalculate all derived clocks
@ -646,7 +646,7 @@ void device_t::pre_save()
void device_t::post_load()
{
// recompute clock-related parameters if something changed
u32 const scaled_clock = m_unscaled_clock * m_clock_scale;
u32 const scaled_clock = m_unscaled_clock * m_clock_scale + 0.5;
if (m_clock != scaled_clock)
{
m_clock = scaled_clock;