VU: Rework VUKickstart in to VUSync, swap behaviour

.github/workflows/scripts/validation/lint-gamedb/lint-gamedb.py

@@ -32,7 +32,7 @@ allowed_game_fixes = [
     "VIF1StallHack",
     "GIFFIFOHack",
     "GoemonTlbHack",
-    "VUKickstartHack",
+    "VUSyncHack",
     "IbitHack",
     "VUOverflowHack",
 ]

pcsx2/Config.h

@@ -42,7 +42,7 @@ enum GamefixId
 	Fix_VIF1Stall,
 	Fix_VuAddSub,
 	Fix_Ibit,
-	Fix_VUKickstart,
+	Fix_VUSync,
 	Fix_VUOverflow,
 	Fix_XGKick,
 
@@ -726,7 +726,7 @@ struct Pcsx2Config
 			VIF1StallHack : 1, // Like above, processes FIFO data before the stall is allowed (to make sure data goes over).
 			VuAddSubHack : 1, // Tri-ace games, they use an encryption algorithm that requires VU ADDI opcode to be bit-accurate.
 			IbitHack : 1, // I bit hack. Needed to stop constant VU recompilation in some games
-			VUKickstartHack : 1, // Gives new VU programs a slight head start and runs VU's ahead of EE to avoid VU register reading/writing issues
+			VUSyncHack : 1, // Makes microVU run behind the EE to avoid VU register reading/writing sync issues. Useful for M-Bit games
 			VUOverflowHack : 1, // Tries to simulate overflow flag checks (not really possible on x86 without soft floats)
 			XgKickHack : 1; // Erementar Gerad, adds more delay to VU XGkick instructions. Corrects the color of some graphics, but breaks Tri-ace games and others.
 		BITFIELD_END

pcsx2/Docs/GameIndex.md

@@ -38,7 +38,7 @@ SERIAL-12345: # !required! Serial number for the game, this is how games are loo
     - GIFFIFOHack
     - GoemonTlbHack
     - IbitHack
-    - VUKickstartHack
+    - VSyncHack
     - VUOverflowHack
   # The value of the speedhacks is assumed to be an integer,
   # but at the time of writing speedhacks are effectively booleans (0/1)
@@ -169,8 +169,8 @@ These values are case-sensitive so take care.  If you incorrectly specify a Game
 *   `IbitHack`
     *   VU I bit Hack avoid constant recompilation in some games (Scarface The World Is Yours, Crash Tag Team Racing).
 
-*   `VUKickstartHack`
-    *   Let the VU's both run ahead of the EE to fix some timing issues.
+*   `VUSyncHack`
+    *   Make the VU's run behind/in sync with the EE to fix some timing issues.
 
 *   `VUOverflowHack`
     *   VU Overflow hack to check for possible float overflows (Superman Returns).

pcsx2/Pcsx2Config.cpp

@@ -743,7 +743,7 @@ static const char* const tbl_GamefixNames[] =
 		"VIF1Stall",
 		"VuAddSub",
 		"Ibit",
-		"VUKickstart",
+		"VUSync",
 		"VUOverflow",
 		"XGKick"};
 
@@ -835,8 +835,8 @@ void Pcsx2Config::GamefixOptions::Set(GamefixId id, bool enabled)
 		case Fix_Ibit:
 			IbitHack = enabled;
 			break;
-		case Fix_VUKickstart:
-			VUKickstartHack = enabled;
+		case Fix_VUSync:
+			VUSyncHack = enabled;
 			break;
 		case Fix_VUOverflow:
 			VUOverflowHack = enabled;
@@ -878,8 +878,8 @@ bool Pcsx2Config::GamefixOptions::Get(GamefixId id) const
 			return GoemonTlbHack;
 		case Fix_Ibit:
 			return IbitHack;
-		case Fix_VUKickstart:
-			return VUKickstartHack;
+		case Fix_VUSync:
+			return VUSyncHack;
 		case Fix_VUOverflow:
 			return VUOverflowHack;
 			jNO_DEFAULT;
@@ -905,7 +905,7 @@ void Pcsx2Config::GamefixOptions::LoadSave(SettingsWrapper& wrap)
 	SettingsWrapBitBool(GIFFIFOHack);
 	SettingsWrapBitBool(GoemonTlbHack);
 	SettingsWrapBitBool(IbitHack);
-	SettingsWrapBitBool(VUKickstartHack);
+	SettingsWrapBitBool(VUSyncHack);
 	SettingsWrapBitBool(VUOverflowHack);
 }
 

pcsx2/VUmicro.cpp

@@ -38,7 +38,6 @@ void BaseVUmicroCPU::ExecuteBlock(bool startUp)
 {
 	const u32& stat = VU0.VI[REG_VPU_STAT].UL;
 	const int test = m_Idx ? 0x100 : 1;
-	const int s = EmuConfig.Gamefixes.VUKickstartHack ? 16 : 0; // Kick Start Cycles (Jak needs at least 4 due to writing values after they're read
 
 	if (m_Idx && THREAD_VU1)
 	{
@@ -46,7 +45,6 @@ void BaseVUmicroCPU::ExecuteBlock(bool startUp)
 		return;
 	}
 
-	
 	if (!(stat & test))
 	{
 		// VU currently flushes XGKICK on VU1 end so no need for this, yet
@@ -57,26 +55,17 @@ void BaseVUmicroCPU::ExecuteBlock(bool startUp)
 		return;
 	}
 
-	if (startUp) // Start Executing a microprogram (When kickstarted)
+	if (startUp)
 	{
-		Execute(s); // Kick start VU
+		Execute(CalculateMinRunCycles(0, false));
 	}
 	else // Continue Executing
 	{
 		u32 cycle = m_Idx ? VU1.cycle : VU0.cycle;
 		s32 delta = (s32)(u32)(cpuRegs.cycle - cycle);
-		s32 nextblockcycles = m_Idx ? VU1.nextBlockCycles : VU0.nextBlockCycles;
 
-		if (EmuConfig.Gamefixes.VUKickstartHack)
-		{
-			if (delta > 0)  // When kickstarting we just need 1 cycle for run ahead
-				Execute(CalculateMinRunCycles(delta, false));
-		}
-		else
-		{
-			if (delta >= nextblockcycles && delta > 0) // When running behind, make sure we have enough cycles passed for the block to run
-				Execute(CalculateMinRunCycles(delta, false));
-		}
+		if (delta > 0)
+			Execute(CalculateMinRunCycles(delta, false));
 	}
 }
 
@@ -87,9 +76,8 @@ void BaseVUmicroCPU::ExecuteBlock(bool startUp)
 void BaseVUmicroCPU::ExecuteBlockJIT(BaseVUmicroCPU* cpu, bool interlocked)
 {
 	const u32& stat = VU0.VI[REG_VPU_STAT].UL;
-	const int test = 1;
+	constexpr int test = 1;
 
-	//DevCon.Warning("Was set %d cycles ago", cpuRegs.cycle - setcycle);
 	if (stat & test)
 	{ // VU is running
 		s32 delta = (s32)(u32)(cpuRegs.cycle - VU0.cycle);

pcsx2/gui/Panels/GameFixesPanel.cpp

@@ -93,7 +93,7 @@ Panels::GameFixesPanel::GameFixesPanel( wxWindow* parent )
 			wxEmptyString
 		},
 		{
-			_("VU Kickstart (Run ahead) to avoid sync problems when reading or writing VU registers"),
+			_("VU Sync (Run behind) to avoid sync problems when reading or writing VU registers"),
 			wxEmptyString
 		},
 		{

pcsx2/x86/ix86-32/iR5900LoadStore.cpp

@@ -959,7 +959,7 @@ void recLQC2()
 	xForwardJZ32 skipvuidle;
 	xSUB(eax, ptr32[&VU0.cycle]);
 	xSUB(eax, ptr32[&VU0.nextBlockCycles]);
-	xCMP(eax, EmuConfig.Gamefixes.VUKickstartHack ? 4 : 0);
+	xCMP(eax, 4);
 	xForwardJL32 skip;
 	_cop2BackupRegs();
 	xLoadFarAddr(arg1reg, CpuVU0);
@@ -1009,7 +1009,7 @@ void recSQC2()
 	xForwardJZ32 skipvuidle;
 	xSUB(eax, ptr32[&VU0.cycle]);
 	xSUB(eax, ptr32[&VU0.nextBlockCycles]);
-	xCMP(eax, EmuConfig.Gamefixes.VUKickstartHack ? 4 : 0);
+	xCMP(eax, 4);
 	xForwardJL32 skip;
 	_cop2BackupRegs();
 	xLoadFarAddr(arg1reg, CpuVU0);

pcsx2/x86/microVU_Compile.inl

@@ -469,7 +469,7 @@ void mVUtestCycles(microVU& mVU, microFlagCycles& mFC)
 	iPC = mVUstartPC;
 
 	xMOV(eax, ptr32[&mVU.cycles]);
-	if (!EmuConfig.Gamefixes.VUKickstartHack)
+	if (EmuConfig.Gamefixes.VUSyncHack)
 		xSUB(eax, mVUcycles); // Running behind, make sure we have time to run the block
 	else
 		xSUB(eax, 1); // Running ahead, make sure cycles left are above 0

pcsx2/x86/microVU_Macro.inl

@@ -340,7 +340,7 @@ void COP2_Interlock(bool mBitSync)
 		{
 			xSUB(eax, ptr32[&VU0.cycle]);
 			xSUB(eax, ptr32[&VU0.nextBlockCycles]);
-			xCMP(eax, 0);
+			xCMP(eax, 4);
 			xForwardJL32 skip;
 			xLoadFarAddr(arg1reg, CpuVU0);
 			xMOV(arg2reg, s_nBlockInterlocked);
@@ -385,7 +385,7 @@ static void recCFC2()
 		xForwardJZ32 skipvuidle;
 		xSUB(eax, ptr32[&VU0.cycle]);
 		xSUB(eax, ptr32[&VU0.nextBlockCycles]);
-		xCMP(eax, EmuConfig.Gamefixes.VUKickstartHack ? 8 : 0);
+		xCMP(eax, 4);
 		xForwardJL32 skip;
 		_cop2BackupRegs();
 		xLoadFarAddr(arg1reg, CpuVU0);
@@ -448,7 +448,7 @@ static void recCTC2()
 		xForwardJZ32 skipvuidle;
 		xSUB(eax, ptr32[&VU0.cycle]);
 		xSUB(eax, ptr32[&VU0.nextBlockCycles]);
-		xCMP(eax, EmuConfig.Gamefixes.VUKickstartHack ? 8 : 0);
+		xCMP(eax, 4);
 		xForwardJL32 skip;
 		_cop2BackupRegs();
 		xLoadFarAddr(arg1reg, CpuVU0);
@@ -551,7 +551,7 @@ static void recQMFC2()
 		xForwardJZ32 skipvuidle;
 		xSUB(eax, ptr32[&VU0.cycle]);
 		xSUB(eax, ptr32[&VU0.nextBlockCycles]);
-		xCMP(eax, EmuConfig.Gamefixes.VUKickstartHack ? 8 : 0);
+		xCMP(eax, 4);
 		xForwardJL32 skip;
 		_cop2BackupRegs();
 		xLoadFarAddr(arg1reg, CpuVU0);
@@ -592,7 +592,7 @@ static void recQMTC2()
 		xForwardJZ32 skipvuidle;
 		xSUB(eax, ptr32[&VU0.cycle]);
 		xSUB(eax, ptr32[&VU0.nextBlockCycles]);
-		xCMP(eax, EmuConfig.Gamefixes.VUKickstartHack ? 8 : 0);
+		xCMP(eax, 4);
 		xForwardJL32 skip;
 		_cop2BackupRegs();
 		xLoadFarAddr(arg1reg, CpuVU0);