sgilissen/llamaplayer
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Refactor timing to allow sync/updates in the middle of a slice

Browse Source
This commit is contained in:
Connor McLaughlin
2019-09-20 23:59:48 +10:00
parent ad316162f3
commit c988af453c
10 changed files with 74 additions and 36 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
src/pse/cpu_core.cpp
View File

@ -26,7 +26,8 @@ bool Core::Initialize(Bus* bus)
void Core::Reset()
{
m_slice_ticks = std::numeric_limits<decltype(m_slice_ticks)>::max();
m_pending_ticks = 0;
m_downcount = MAX_SLICE_SIZE;
m_regs = {};
@ -47,7 +48,8 @@ void Core::Reset()
bool Core::DoState(StateWrapper& sw)
{
sw.Do(&m_slice_ticks);
sw.Do(&m_pending_ticks);
sw.Do(&m_downcount);
sw.DoArray(m_regs.r, countof(m_regs.r));
sw.Do(&m_regs.pc);
sw.Do(&m_regs.hi);
@ -312,12 +314,12 @@ void Core::DisassembleAndPrint(u32 addr)
PrintInstruction(bits, addr);
}
TickCount Core::Execute()
void Core::Execute()
{
TickCount executed_ticks = 0;
while (executed_ticks < m_slice_ticks)
while (m_downcount >= 0)
{
executed_ticks++;
m_pending_ticks += 3;
m_downcount -= 3;
// now executing the instruction we previously fetched
const Instruction inst = m_next_instruction;
@ -340,10 +342,6 @@ TickCount Core::Execute()
m_load_delay_old_value = m_next_load_delay_old_value;
m_next_load_delay_old_value = 0;
}
// reset slice ticks, it'll be updated when the components execute
m_slice_ticks = MAX_CPU_SLICE_SIZE;
return executed_ticks;
}
bool Core::FetchInstruction()