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[JIT]: Simplify register accesses, implement more instructions, rework some branching logic

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SimoneN64
2025-01-15 00:37:29 +01:00
parent 23ddc0b9f7
commit e065558147
9 changed files with 557 additions and 247 deletions
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39
src/backend/core/JIT.cpp
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@@ -2,7 +2,7 @@
#include <jit/helpers.hpp>
namespace n64 {
JIT::JIT(ParallelRDP &parallel) : regs(this), mem(regs, parallel) {}
JIT::JIT(ParallelRDP &parallel) : regs(this), mem(regs, parallel, this) { blockCache.resize(kUpperSize); }
bool JIT::ShouldServiceInterrupt() const {
const bool interrupts_pending = (regs.cop0.status.im & regs.cop0.cause.interruptPending) != 0;
@@ -23,18 +23,26 @@ void JIT::CheckCompareInterrupt() {
}
int JIT::Step() {
u32 instruction = 0;
s64 pc = regs.pc;
blockPC = regs.pc;
if (!blockCache[blockPC >> 8].empty()) {
if (blockCache[blockPC >> 8][blockPC >> 20]) {
return blockCache[blockPC >> 8][blockPC >> 20]();
}
} else {
blockCache[blockPC >> 8].resize(kLowerSize);
}
regs.block_delaySlot = false;
u32 instruction;
do {
// CheckCompareInterrupt();
// regs.prevDelaySlot = regs.delaySlot;
// regs.delaySlot = false;
if (check_address_error(0b11, u64(pc))) [[unlikely]] {
/*regs.cop0.HandleTLBException(pc);
regs.cop0.FireException(ExceptionCode::AddressErrorLoad, 0, pc);
if (check_address_error(0b11, u64(blockPC))) [[unlikely]] {
/*regs.cop0.HandleTLBException(blockPC);
regs.cop0.FireException(ExceptionCode::AddressErrorLoad, 0, blockPC);
return 1;*/
Util::panic("[JIT]: Unhandled exception ADL due to unaligned PC virtual value! (0x{:016lX})",
@@ -42,9 +50,10 @@ int JIT::Step() {
}
u32 paddr = 0;
if (!regs.cop0.MapVAddr(Cop0::LOAD, pc, paddr)) {
/*regs.cop0.HandleTLBException(pc);
regs.cop0.FireException(Cop0::GetTLBExceptionCode(regs.cop0.tlbError, Cop0::LOAD), 0, pc);
if (!regs.cop0.MapVAddr(Cop0::LOAD, blockPC, paddr)) {
/*regs.cop0.HandleTLBException(blockPC);
regs.cop0.FireException(Cop0::GetTLBExceptionCode(regs.cop0.tlbError, Cop0::LOAD), 0, blockPC);
return 1;*/
Util::panic(
"[JIT]: Unhandled exception TLB exception {} when retrieving PC physical address! (virtual: 0x{:016lX})",
@@ -58,15 +67,15 @@ int JIT::Step() {
return 1;
}*/
pc += 4;
blockPC += 4;
Emit(instruction);
}
while (!InstrEndsBlock(instruction));
// emit code to store the value of pc
return 1;
blockCache[regs.pc >> 8][regs.pc >> 20] = code.getCurr<BlockFn>();
return blockCache[regs.pc >> 8][regs.pc >> 20]();
}
std::vector<u8> JIT::Serialize() {