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refactor: 引入 Arena 内存池并优化指令分发，为类型系统重构做准备

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PuqiAR
2026-03-08 15:59:55 +08:00
parent 91e4eb734e
commit 90448006ff
13 changed files with 301 additions and 36 deletions
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68
src/VM/VM.cpp
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@@ -86,24 +86,37 @@ namespace Fig
pushFrame(entry, registers);
// 🔥 必须与 Bytecode.hpp 中的 OpCode 枚举严格一一对应！
static const void *dispatchTable[] = {&&do_Exit,
static const void *dispatchTable[] = {
&&do_Exit,
&&do_LoadK,
&&do_LoadTrue,
&&do_LoadFalse,
&&do_LoadNull,
&&do_FastCall,
&&do_Call,
&&do_Return,
&&do_LoadFn,
&&do_Jmp,
&&do_JmpIfFalse,
&&do_Mov,
&&do_Add,
&&do_Sub,
&&do_Mul,
&&do_Div,
&&do_Mod,
&&do_BitXor,
&&do_IntFastAdd,
&&do_IntFastSub,
&&do_IntFastMul,
&&do_IntFastDiv,
&&do_Equal,
&&do_NotEqual,
&&do_Greater,
@@ -114,7 +127,7 @@ namespace Fig
Instruction inst;
// 🔥 核心分发引擎：取指 -> 直接查表并 Jump
// 取指 -> 直接查表并 Jump
#define DISPATCH() \
do \
{ \
@@ -122,7 +135,7 @@ namespace Fig
goto *dispatchTable[inst & 0xFF]; \
} while (0)
// 引擎点火！
// 引擎点火!! :3
DISPATCH();
do_Exit: {
@@ -215,6 +228,54 @@ namespace Fig
assert(false && "VM: Mod and BitXor not fully implemented yet!");
DISPATCH();
do_IntFastAdd: {
std::uint8_t a = decodeA(inst);
std::uint8_t b = decodeB(inst);
std::uint8_t c = decodeC(inst);
Value l = currentFrame->registerBase[b];
Value r = currentFrame->registerBase[c];
currentFrame->registerBase[a] = Value::FromInt(l.AsInt() + r.AsInt());
DISPATCH();
}
do_IntFastSub: {
std::uint8_t a = decodeA(inst);
std::uint8_t b = decodeB(inst);
std::uint8_t c = decodeC(inst);
Value l = currentFrame->registerBase[b];
Value r = currentFrame->registerBase[c];
currentFrame->registerBase[a] = Value::FromInt(l.AsInt() - r.AsInt());
DISPATCH();
}
do_IntFastMul: {
std::uint8_t a = decodeA(inst);
std::uint8_t b = decodeB(inst);
std::uint8_t c = decodeC(inst);
Value l = currentFrame->registerBase[b];
Value r = currentFrame->registerBase[c];
currentFrame->registerBase[a] = Value::FromInt(l.AsInt() * r.AsInt());
DISPATCH();
}
do_IntFastDiv: {
std::uint8_t a = decodeA(inst);
std::uint8_t b = decodeB(inst);
std::uint8_t c = decodeC(inst);
Value l = currentFrame->registerBase[b];
Value r = currentFrame->registerBase[c];
currentFrame->registerBase[a] = Value::FromDouble(l.AsInt() + r.AsInt());
DISPATCH();
}
BINARY_COMPARE_OP(Equal, ==);
BINARY_COMPARE_OP(NotEqual, !=);
BINARY_COMPARE_OP(Greater, >);
@@ -226,5 +287,6 @@ namespace Fig
assert(false && "Hit Count sentinel!");
return Value::GetNullInstance();
}
}
}; // namespace Fig