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CPU/Recompiler: Implement syscall/break

This commit is contained in:
Connor McLaughlin 2019-11-23 12:48:53 +10:00
parent d2d0d5287b
commit 2f3107216a
1 changed files with 21 additions and 7 deletions
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28
src/core/cpu_recompiler_code_generator.cpp
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@ -163,6 +163,8 @@ bool CodeGenerator::CompileInstruction(const CodeBlockInstruction& cbi)
case InstructionFunct::jr:
case InstructionFunct::jalr:
case InstructionFunct::syscall:
case InstructionFunct::break_:
result = Compile_Branch(cbi);
break;
@ -1219,13 +1221,25 @@ bool CodeGenerator::Compile_Branch(const CodeBlockInstruction& cbi)
case InstructionOp::funct:
{
Assert(cbi.instruction.r.funct == InstructionFunct::jr || cbi.instruction.r.funct == InstructionFunct::jalr);
// npc = rs, link to rt
Value branch_target = m_register_cache.ReadGuestRegister(cbi.instruction.r.rs);
EmitBranch(Condition::Always,
(cbi.instruction.r.funct == InstructionFunct::jalr) ? cbi.instruction.r.rd : Reg::count, false,
std::move(branch_target));
if (cbi.instruction.r.funct == InstructionFunct::jr || cbi.instruction.r.funct == InstructionFunct::jalr)
{
// npc = rs, link to rt
Value branch_target = m_register_cache.ReadGuestRegister(cbi.instruction.r.rs);
EmitBranch(Condition::Always,
(cbi.instruction.r.funct == InstructionFunct::jalr) ? cbi.instruction.r.rd : Reg::count, false,
std::move(branch_target));
}
else if (cbi.instruction.r.funct == InstructionFunct::syscall ||
cbi.instruction.r.funct == InstructionFunct::break_)
{
const Exception excode =
(cbi.instruction.r.funct == InstructionFunct::syscall) ? Exception::Syscall : Exception::BP;
EmitRaiseException(excode);
}
else
{
UnreachableCode();
}
}
break;