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Improved EE/IOP synchronization and also reduced the frequency of EE branch text executions (speedup!) 

git-svn-id: http://pcsx2-playground.googlecode.com/svn/trunk@269 a6443dda-0b58-4228-96e9-037be469359c
This commit is contained in:
Jake.Stine 2008-11-02 04:53:55 +00:00 committed by Gregory Hainaut
parent ea781f8283
commit d799884153
2 changed files with 26 additions and 7 deletions
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4
pcsx2/R3000A.c
View File

@ -165,11 +165,11 @@ static void _psxTestInterrupts() {
// drawback. The IOP is almost always forced to perform branch tests at import-
// ant intervals regardless of this value (such as counter or irq events, hsyncs,
// etc.)
#define IOP_WAIT_CYCLE 256
#define IOP_WAIT_CYCLE 1024
void psxBranchTest()
{
g_psxNextBranchCycle = psxRegs.cycle;
g_psxNextBranchCycle = psxRegs.cycle + IOP_WAIT_CYCLE;
if ((int)(psxRegs.cycle - psxNextsCounter) >= psxNextCounter)
psxRcntUpdate();

29
pcsx2/R5900.c
View File

@ -382,7 +382,7 @@ _inline static void _cpuTestTIMR() {
}
}
#define EE_WAIT_CYCLE 512
#define EE_WAIT_CYCLE 2048
// if cpuRegs.cycle is greater than this cycle, should check cpuBranchTest for updates
u32 g_nextBranchCycle = 0;
@ -435,9 +435,12 @@ void cpuBranchTest()
//#endif
_cpuTestTIMR();
// ---- IOP -------------
// Signal for an immediate branch test! This is important! The IOP must
// be able to act on the state the EE has given it before executing any
// additional code. Everything just seems a lot happier this way!
// additional code. Dothing this actually fixes some games that used to crash
// when trying to boot them through the BIOS.
psxBranchTest();
@ -445,15 +448,31 @@ void cpuBranchTest()
EEoCycle = cpuRegs.cycle;
psxCpu->ExecuteBlock();
// IOP Synchronization:
// If the IOP needs to branch soon then so should the EE.
// As the master of all, the EE should look out for its children and
// assure them the love they deserve:
{
u32 iopDelta = (g_psxNextBranchCycle-psxRegs.cycle)*8;
if( g_nextBranchCycle - cpuRegs.cycle > iopDelta )
g_nextBranchCycle = cpuRegs.cycle + iopDelta;
}
// ---- VU0 -------------
if (VU0.VI[REG_VPU_STAT].UL & 0x1) {
FreezeXMMRegs(1);
Cpu->ExecuteVU0Block();
FreezeXMMRegs(0);
}
if( (int)cpuRegs.cycle-(int)g_nextBranchCycle > 0 )
g_nextBranchCycle = cpuRegs.cycle+1;
// [Air] dead code? There shouldn't be any reason to bother checking
// for g_nextBranchCycle being behind cpuRegs.cycle, since the branch code will
// just do the same check after the next block.
//if( (int)cpuRegs.cycle-(int)g_nextBranchCycle > 0 )
// g_nextBranchCycle = cpuRegs.cycle+1;
#ifndef PCSX2_NORECBUILD
assert( !g_globalXMMSaved X86_32CODE(&& !g_globalMMXSaved) );