forked from PuqiAR/Fig-TreeWalker
PuqiAR
e28921ae02
[Fix] 修复科学表达式数字解析的问题（Lexer引起） 由 Satklomi发现，感谢 [Feat] 增加Compiler相关定义，将开发BytecodeVM [Tip] Evaluator进入Bug fix阶段，新功能延缓开发。转向VM
125 lines
3.7 KiB
C++
125 lines
3.7 KiB
C++
#pragma once
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/*
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从树遍历到虚拟机!
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*/
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#include "Core/fig_string.hpp"
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#include "Utils/magic_enum/magic_enum.hpp"
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#include <cstdint>
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#include <format>
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#include <string_view>
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namespace Fig
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{
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using OpCodeType = uint8_t;
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enum class Bytecode : OpCodeType
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{
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HALT = 0x01, // 程序终止，后跟 8 位退出码
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POP = 0x10,
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LOAD_NULL = 0x20,
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LOAD_TRUE = 0x21,
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LOAD_FALSE = 0x22,
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LOAD_CON8 = 0x23, // 跟 8 位索引 (0 - 255)
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LOAD_CON16 = 0x24, // 跟 16 位索引 (255 - 65535)
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LOAD_CON32 = 0x25, // 跟 32 位索引 (65536 - 2^32-1)
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ADD = 0x30, // +
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SUB = 0x31, // -
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MUL = 0x32, // *
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DIV = 0x33, // /
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MOD = 0x34, // %
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AND = 0x40, // &
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OR = 0x41, // |
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XOR = 0x42, // ~
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NOT = 0x43, // ! (not)
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EQ = 0x50, // ==
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GT = 0x51, // >
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GTEQ = 0x52, // >=
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LT = 0x53, // <
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LTEQ = 0x54, // <=
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JUMP16 = 0x60, // 跟 16 位索引 无条件
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JUMP32 = 0x61, // 跟 32 位索引 无条件
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JUMP16_IF_TRUE = 0x62, // 跟 16 位索引 栈顶为真跳转
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JUMP32_IF_TRUE = 0x63, // 跟 32 位索引 栈顶为真跳转
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JUMP16_IF_FALSE = 0x64, // 跟 16 位索引 栈顶为假跳转
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JUMP32_IF_FALSE = 0x65, // 跟 32 位索引 栈顶为假跳转
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LOAD_LOCAL16 = 0x70, // 后跟 16 位索引
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LOAD_LOCAL32 = 0x71, // 后跟 32 位索引
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};
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inline FString bytecode2string(Bytecode code)
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{
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const std::string_view &name = magic_enum::enum_name(code);
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return FString(FStringView(name));
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}
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inline FString reverseCompile(const std::vector<uint8_t> &src)
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{
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assert(src.size() >= 1);
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FString result;
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using enum Bytecode;
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for (size_t i = 0; i < src.size();)
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{
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Bytecode code = Bytecode(src[i]);
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switch (code)
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{
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case HALT: {
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uint8_t quitCode = src[++i];
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result += FString(std::format("HALT {}", static_cast<uint8_t>(quitCode))) + u8"\n";
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break;
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}
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case LOAD_CON8: {
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uint8_t id = src[++i];
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result += FString(std::format("LOAD_CON8 {}", static_cast<uint8_t>(id))) + u8"\n";
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break;
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}
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case LOAD_CON16:
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case JUMP16:
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case JUMP16_IF_TRUE:
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case JUMP16_IF_FALSE:
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case LOAD_LOCAL16: {
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uint8_t high = src[++i];
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uint8_t low = src[++i];
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int32_t id = (high << 8) | low;
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result += FString(std::format("{} {}", bytecode2string(code).toBasicString(), id))
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+ u8"\n";
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break;
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}
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case LOAD_CON32:
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case JUMP32:
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case JUMP32_IF_TRUE:
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case JUMP32_IF_FALSE:
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case LOAD_LOCAL32: {
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uint32_t b0 = static_cast<uint32_t>(src[++i]);
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uint32_t b1 = static_cast<uint32_t>(src[++i]);
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uint32_t b2 = static_cast<uint32_t>(src[++i]);
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uint32_t b3 = static_cast<uint32_t>(src[++i]);
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uint32_t id = (b0 << 24) | (b1 << 16) | (b2 << 8) | b3;
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result += FString(std::format("{} {}", bytecode2string(code).toBasicString(), id))
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+ u8"\n";
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break;
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}
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default: {
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result += bytecode2string(code) + u8"\n";
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}
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}
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++i;
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}
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return result;
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}
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}; // namespace Fig
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