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[JIT]: Finally executing out of bootcode!

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This commit is contained in:
SimoneN64
2025-01-21 22:32:24 +01:00
parent f67f968f91
commit 043e20c517
5 changed files with 32 additions and 21 deletions
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2
src/backend/Scheduler.cpp
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@@ -2,6 +2,8 @@
#include <core/Mem.hpp>
#include <core/registers/Registers.hpp>
Scheduler scheduler;
void Scheduler::EnqueueRelative(const u64 t, const EventType type) { EnqueueAbsolute(t + ticks, type); }
void Scheduler::EnqueueAbsolute(const u64 t, const EventType type) { events.push({t, type}); }

2
src/backend/Scheduler.hpp
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@@ -45,4 +45,4 @@ struct Scheduler {
u8 index = 0;
};
inline Scheduler scheduler;
extern Scheduler scheduler;

11
src/backend/core/JIT.cpp
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@@ -63,7 +63,8 @@ int JIT::Step() {
bool branchWasLikely = false;
bool blockEndsOnBranch = false;
code.sub(code.rsp, 56);
// code.int3();
code.sub(code.rsp, 8);
code.push(code.rbp);
code.mov(code.rbp, reinterpret_cast<uintptr_t>(this)); // Load context pointer
@@ -110,7 +111,7 @@ int JIT::Step() {
if (instrInDelaySlot && branchWasLikely) {
branchWasLikely = false;
code.L("not_taken");
code.L(branch_likely_not_taken);
code.mov(code.rax, blockPC);
code.mov(REG(qword, pc), code.rax);
}
@@ -123,11 +124,11 @@ int JIT::Step() {
}
code.mov(code.rax, instructionsInBlock);
code.pop(code.rbp);
code.add(code.rsp, 56);
code.add(code.rsp, 8);
code.ret();
code.setProtectModeRE();
// const auto dump = code.getCode();
// Util::WriteFileBinary(dump, code.getSize(), "jit.dump");
const auto dump = code.getCode();
Util::WriteFileBinary(dump, code.getSize(), "jit.dump");
// Util::panic("");
return block();
}

3
src/backend/core/JIT.hpp
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@@ -43,6 +43,7 @@ private:
friend struct Cop1;
friend struct Registers;
using BlockFn = int (*)();
Xbyak::Label branch_likely_not_taken;
std::vector<std::vector<BlockFn>> blockCache;
template <typename T>
@@ -84,7 +85,9 @@ private:
code.mov(code.rdi, thisPtr);
code.mov(code.rax, functionPtr);
code.sub(code.rsp, 8);
code.call(code.rax);
code.add(code.rsp, 8);
}
void SkipSlot();

35
src/backend/core/jit/instructions.cpp
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@@ -162,50 +162,55 @@ void JIT::SkipSlot() { code.jmp("not_taken"); }
void JIT::SkipSlotConstant() { blockPC += 4; }
void JIT::BranchTaken(const s64 offs) {
code.mov(code.rax, REG(qword, pc));
code.add(code.rax, offs);
code.mov(code.rax, blockPC + offs);
code.mov(REG(qword, pc), code.rax);
}
void JIT::BranchTaken(const Xbyak::Reg64 &offs) { code.add(REG(qword, pc), offs); }
void JIT::BranchTaken(const Xbyak::Reg64 &offs) {
code.add(offs, blockPC);
code.mov(REG(qword, pc), offs);
}
void JIT::BranchAbsTaken(const s64 addr) {
code.mov(code.rax, addr);
code.mov(REG(qword, pc), code.rax);
}
void JIT::BranchAbsTaken(const Xbyak::Reg64 &addr) { code.mov(REG(qword, nextPC), addr); }
void JIT::BranchAbsTaken(const Xbyak::Reg64 &addr) { code.mov(REG(qword, pc), addr); }
#define branch(offs, cond) \
do { \
code.j##cond("taken"); \
Xbyak::Label taken, not_taken; \
code.j##cond(taken); \
code.mov(code.rax, blockPC); \
code.mov(REG(qword, pc), code.rax); \
code.jmp("not_taken"); \
code.L("taken"); \
code.jmp(not_taken); \
code.L(taken); \
BranchTaken(offs); \
code.L("not_taken"); \
code.L(not_taken); \
} \
while (0)
#define branch_abs(addr, cond) \
do { \
code.j##cond("taken"); \
Xbyak::Label taken, not_taken; \
code.j##cond(taken); \
code.mov(code.rax, blockPC); \
code.mov(REG(qword, pc), code.rax); \
code.jmp("not_taken"); \
code.L("taken"); \
code.jmp(not_taken); \
code.L(taken); \
BranchAbsTaken(addr); \
code.L("not_taken"); \
code.L(not_taken); \
} \
while (0)
#define branch_likely(offs, cond) \
do { \
code.j##cond("taken"); \
Xbyak::Label taken; \
code.j##cond(taken); \
SkipSlot(); \
code.jmp("not_taken"); \
code.L("taken"); \
code.jmp(branch_likely_not_taken); \
code.L(taken); \
BranchTaken(offs); \
} \
while (0)