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CPU/Recompiler: Gate debug exceptions behind memory exception flag 

Libcrypt games seem to leave exceptions enabled, and it forces
interpreter for them when it's unnecessary.
This commit is contained in:
Connor McLaughlin 2021-04-22 15:43:33 +10:00
parent fe1a582909
commit cfb4b058d1
1 changed files with 12 additions and 5 deletions
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17
src/core/cpu_recompiler_code_generator.cpp
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@ -2515,29 +2515,36 @@ bool CodeGenerator::Compile_cop0(const CodeBlockInstruction& cbi)
EmitBindLabel(&no_interrupt);
m_register_cache.UninhibitAllocation();
}
else if (reg == Cop0Reg::DCIC)
else if (reg == Cop0Reg::DCIC && g_settings.cpu_recompiler_memory_exceptions)
{
Value dcic_value = m_register_cache.AllocateScratch(RegSize_32);
m_register_cache.InhibitAllocation();
// if ((dcic & master_enable_bits) != master_enable_bits) goto not_enabled;
LabelType not_enabled;
EmitLoadCPUStructField(dcic_value.host_reg, dcic_value.size, offsetof(State, cop0_regs.dcic.bits));
EmitAnd(dcic_value.host_reg, dcic_value.host_reg,
EmitLoadCPUStructField(dcic_value.GetHostRegister(), dcic_value.size, offsetof(State, cop0_regs.dcic.bits));
EmitAnd(dcic_value.GetHostRegister(), dcic_value.GetHostRegister(),
Value::FromConstantU32(Cop0Registers::DCIC::MASTER_ENABLE_BITS));
EmitConditionalBranch(Condition::NotEqual, false, dcic_value.host_reg,
Value::FromConstantU32(Cop0Registers::DCIC::MASTER_ENABLE_BITS), &not_enabled);
// if ((dcic & breakpoint_bits) == 0) goto not_enabled;
EmitLoadCPUStructField(dcic_value.host_reg, dcic_value.size, offsetof(State, cop0_regs.dcic.bits));
EmitTest(dcic_value.host_reg, Value::FromConstantU32(Cop0Registers::DCIC::ANY_BREAKPOINTS_ENABLED_BITS));
EmitLoadCPUStructField(dcic_value.GetHostRegister(), dcic_value.size, offsetof(State, cop0_regs.dcic.bits));
EmitTest(dcic_value.GetHostRegister(),
Value::FromConstantU32(Cop0Registers::DCIC::ANY_BREAKPOINTS_ENABLED_BITS));
EmitConditionalBranch(Condition::Zero, false, &not_enabled);
// update dispatcher flag, if enabled, exit block
EmitFunctionCall(nullptr, &UpdateDebugDispatcherFlag);
EmitLoadCPUStructField(dcic_value.GetHostRegister(), RegSize_8, offsetof(State, use_debug_dispatcher));
EmitBranchIfBitClear(dcic_value.GetHostRegister(), RegSize_8, 0, &not_enabled);
m_register_cache.UninhibitAllocation();
// exit block early if enabled
EmitBranch(GetCurrentFarCodePointer());
SwitchToFarCode();
WriteNewPC(CalculatePC(), false);
EmitExceptionExit();
SwitchToNearCode();