爱特每羊队
334 lines
11 KiB
Rust
334 lines
11 KiB
Rust
use std::fmt;
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/// OpCode for register-based bytecode VM.
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///
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/// Organized in groups of 16 for readability. Implemented opcodes have
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/// emitter support in the compiler; placeholder opcodes are reserved
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/// for future phases (IC, profiling, parallelization).
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#[repr(u8)]
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#[derive(Debug, Clone, Copy, PartialEq, Eq)]
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#[allow(non_camel_case_types)]
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pub enum OpCode {
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// ── Arithmetic (0x00-0x0F) ──
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ADD = 0x00,
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SUB = 0x01,
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MUL = 0x02,
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DIV = 0x03,
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MOD = 0x04,
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NEG = 0x05,
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COMPOUND_ADD = 0x06,
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COMPOUND_SUB = 0x07,
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COMPOUND_MUL = 0x08,
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COMPOUND_DIV = 0x09,
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COMPOUND_MOD = 0x0A,
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COMPOUND_EXP = 0x0B,
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// -- Comparison (0x10-0x1F) --
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EQ = 0x10,
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NEQ = 0x11,
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LT = 0x12,
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GT = 0x13,
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LTE = 0x14,
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GTE = 0x15,
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IN = 0x16,
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NOT = 0x17,
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AND = 0x18,
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OR = 0x19,
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STRICT_EQ = 0x1A,
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STRICT_NEQ = 0x1C,
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UNARY_PLUS = 0x1D,
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// -- Control Flow (0x20-0x2F) --
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JMP = 0x20,
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JMP_IF_FALSE = 0x21,
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JMP_IF_TRUE = 0x22,
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// -- Update (0x25-0x28) --
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INC_PRE = 0x25,
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INC_POST = 0x26,
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DEC_PRE = 0x27,
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DEC_POST = 0x28,
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FOR_IN_INIT = 0x29,
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FOR_IN_NEXT = 0x2A,
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FOR_IN_DONE = 0x2B,
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SWITCH_TABLE = 0x2C,
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FOR_IN_CLEANUP = 0x2D,
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// ── Variable (0x30-0x3F) ──
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LOAD_VAR = 0x30,
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STORE_VAR = 0x31,
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LOAD_CONST = 0x32,
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// ── Call (0x40-0x4F) ──
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CALL = 0x40,
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RETURN = 0x41,
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// ── Object Property (0x50-0x5F) ──
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IC_GET_PROP = 0x50,
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IC_SET_PROP = 0x51,
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GET_PROP = 0x52,
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GET_PROP_DYNAMIC = 0x53,
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SET_PROP = 0x54,
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SET_PROP_DYNAMIC = 0x55,
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NEW_OBJECT = 0x56,
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NEW_ARRAY = 0x57,
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SET_ELEM = 0x58,
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// -- Member Update (0x59-0x62) --
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MEMBER_INC = 0x59,
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MEMBER_DEC = 0x5A,
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DYN_MEMBER_INC = 0x5B,
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DYN_MEMBER_DEC = 0x5C,
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COMPOUND_MEMBER_ADD = 0x5D,
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COMPOUND_MEMBER_SUB = 0x5E,
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COMPOUND_MEMBER_MUL = 0x5F,
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COMPOUND_MEMBER_DIV = 0x60,
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COMPOUND_MEMBER_MOD = 0x61,
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COMPOUND_MEMBER_EXP = 0x62,
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// -- Profiling - placeholders (0x63-0x6F) --
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PROFILE_TYPE = 0x63,
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PROFILE_SHAPE = 0x64,
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PROFILE_BRANCH = 0x65,
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PROFILE_CALL = 0x66,
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// ── Parallel — placeholders (0x70-0x7F) ──
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FORK = 0x70,
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JOIN = 0x71,
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// ── Misc (0xF0-0xFF) ──
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NOP = 0xF0,
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HALT = 0xF1,
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TYPEOF = 0xF2,
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VOID = 0xF3,
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}
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impl OpCode {
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pub fn is_implemented(&self) -> bool {
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!matches!(
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self,
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OpCode::PROFILE_TYPE
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| OpCode::PROFILE_SHAPE
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| OpCode::PROFILE_BRANCH
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| OpCode::PROFILE_CALL
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| OpCode::FORK
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| OpCode::JOIN
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)
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}
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}
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impl TryFrom<u8> for OpCode {
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type Error = ();
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fn try_from(value: u8) -> Result<Self, Self::Error> {
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match value {
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0x00 => Ok(OpCode::ADD),
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0x01 => Ok(OpCode::SUB),
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0x02 => Ok(OpCode::MUL),
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0x03 => Ok(OpCode::DIV),
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0x04 => Ok(OpCode::MOD),
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0x05 => Ok(OpCode::NEG),
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0x06 => Ok(OpCode::COMPOUND_ADD),
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0x07 => Ok(OpCode::COMPOUND_SUB),
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0x08 => Ok(OpCode::COMPOUND_MUL),
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0x09 => Ok(OpCode::COMPOUND_DIV),
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0x0A => Ok(OpCode::COMPOUND_MOD),
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0x0B => Ok(OpCode::COMPOUND_EXP),
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0x10 => Ok(OpCode::EQ),
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0x11 => Ok(OpCode::NEQ),
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0x12 => Ok(OpCode::LT),
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0x13 => Ok(OpCode::GT),
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0x14 => Ok(OpCode::LTE),
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0x15 => Ok(OpCode::GTE),
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0x16 => Ok(OpCode::IN),
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0x17 => Ok(OpCode::NOT),
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0x18 => Ok(OpCode::AND),
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0x19 => Ok(OpCode::OR),
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0x1A => Ok(OpCode::STRICT_EQ),
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0x1C => Ok(OpCode::STRICT_NEQ),
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0x1D => Ok(OpCode::UNARY_PLUS),
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0x20 => Ok(OpCode::JMP),
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0x21 => Ok(OpCode::JMP_IF_FALSE),
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0x22 => Ok(OpCode::JMP_IF_TRUE),
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0x25 => Ok(OpCode::INC_PRE),
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0x26 => Ok(OpCode::INC_POST),
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0x27 => Ok(OpCode::DEC_PRE),
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0x28 => Ok(OpCode::DEC_POST),
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0x29 => Ok(OpCode::FOR_IN_INIT),
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0x2A => Ok(OpCode::FOR_IN_NEXT),
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0x2B => Ok(OpCode::FOR_IN_DONE),
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0x2C => Ok(OpCode::SWITCH_TABLE),
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0x2D => Ok(OpCode::FOR_IN_CLEANUP),
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0x30 => Ok(OpCode::LOAD_VAR),
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0x31 => Ok(OpCode::STORE_VAR),
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0x32 => Ok(OpCode::LOAD_CONST),
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0x40 => Ok(OpCode::CALL),
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0x41 => Ok(OpCode::RETURN),
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0x50 => Ok(OpCode::IC_GET_PROP),
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0x51 => Ok(OpCode::IC_SET_PROP),
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0x52 => Ok(OpCode::GET_PROP),
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0x53 => Ok(OpCode::GET_PROP_DYNAMIC),
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0x54 => Ok(OpCode::SET_PROP),
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0x55 => Ok(OpCode::SET_PROP_DYNAMIC),
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0x56 => Ok(OpCode::NEW_OBJECT),
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0x57 => Ok(OpCode::NEW_ARRAY),
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0x58 => Ok(OpCode::SET_ELEM),
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0x59 => Ok(OpCode::MEMBER_INC),
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0x5A => Ok(OpCode::MEMBER_DEC),
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0x5B => Ok(OpCode::DYN_MEMBER_INC),
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0x5C => Ok(OpCode::DYN_MEMBER_DEC),
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0x5D => Ok(OpCode::COMPOUND_MEMBER_ADD),
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0x5E => Ok(OpCode::COMPOUND_MEMBER_SUB),
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0x5F => Ok(OpCode::COMPOUND_MEMBER_MUL),
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0x60 => Ok(OpCode::COMPOUND_MEMBER_DIV),
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0x61 => Ok(OpCode::COMPOUND_MEMBER_MOD),
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0x62 => Ok(OpCode::COMPOUND_MEMBER_EXP),
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0x63 => Ok(OpCode::PROFILE_TYPE),
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0x64 => Ok(OpCode::PROFILE_SHAPE),
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0x65 => Ok(OpCode::PROFILE_BRANCH),
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0x66 => Ok(OpCode::PROFILE_CALL),
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0x70 => Ok(OpCode::FORK),
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0x71 => Ok(OpCode::JOIN),
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0xF0 => Ok(OpCode::NOP),
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0xF1 => Ok(OpCode::HALT),
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0xF2 => Ok(OpCode::TYPEOF),
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0xF3 => Ok(OpCode::VOID),
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_ => Err(()),
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}
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}
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}
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impl fmt::Display for OpCode {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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let name = match self {
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OpCode::ADD => "ADD",
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OpCode::SUB => "SUB",
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OpCode::MUL => "MUL",
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OpCode::DIV => "DIV",
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OpCode::MOD => "MOD",
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OpCode::NEG => "NEG",
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OpCode::COMPOUND_ADD => "COMPOUND_ADD",
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OpCode::COMPOUND_SUB => "COMPOUND_SUB",
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OpCode::COMPOUND_MUL => "COMPOUND_MUL",
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OpCode::COMPOUND_DIV => "COMPOUND_DIV",
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OpCode::COMPOUND_MOD => "COMPOUND_MOD",
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OpCode::COMPOUND_EXP => "COMPOUND_EXP",
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OpCode::EQ => "EQ",
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OpCode::NEQ => "NEQ",
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OpCode::LT => "LT",
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OpCode::GT => "GT",
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OpCode::LTE => "LTE",
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OpCode::GTE => "GTE",
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OpCode::IN => "IN",
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OpCode::NOT => "NOT",
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OpCode::AND => "AND",
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OpCode::OR => "OR",
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OpCode::STRICT_EQ => "STRICT_EQ",
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OpCode::STRICT_NEQ => "STRICT_NEQ",
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OpCode::UNARY_PLUS => "UNARY_PLUS",
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OpCode::JMP => "JMP",
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OpCode::JMP_IF_FALSE => "JMP_IF_FALSE",
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OpCode::JMP_IF_TRUE => "JMP_IF_TRUE",
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OpCode::INC_PRE => "INC_PRE",
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OpCode::INC_POST => "INC_POST",
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OpCode::DEC_PRE => "DEC_PRE",
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OpCode::DEC_POST => "DEC_POST",
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OpCode::FOR_IN_INIT => "FOR_IN_INIT",
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OpCode::FOR_IN_NEXT => "FOR_IN_NEXT",
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OpCode::FOR_IN_DONE => "FOR_IN_DONE",
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OpCode::SWITCH_TABLE => "SWITCH_TABLE",
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OpCode::FOR_IN_CLEANUP => "FOR_IN_CLEANUP",
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OpCode::LOAD_VAR => "LOAD_VAR",
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OpCode::STORE_VAR => "STORE_VAR",
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OpCode::LOAD_CONST => "LOAD_CONST",
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OpCode::CALL => "CALL",
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OpCode::RETURN => "RETURN",
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OpCode::IC_GET_PROP => "IC_GET_PROP",
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OpCode::IC_SET_PROP => "IC_SET_PROP",
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OpCode::GET_PROP => "GET_PROP",
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OpCode::GET_PROP_DYNAMIC => "GET_PROP_DYNAMIC",
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OpCode::SET_PROP => "SET_PROP",
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OpCode::SET_PROP_DYNAMIC => "SET_PROP_DYNAMIC",
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OpCode::NEW_OBJECT => "NEW_OBJECT",
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OpCode::NEW_ARRAY => "NEW_ARRAY",
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OpCode::SET_ELEM => "SET_ELEM",
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OpCode::MEMBER_INC => "MEMBER_INC",
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OpCode::MEMBER_DEC => "MEMBER_DEC",
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OpCode::DYN_MEMBER_INC => "DYN_MEMBER_INC",
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OpCode::DYN_MEMBER_DEC => "DYN_MEMBER_DEC",
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OpCode::COMPOUND_MEMBER_ADD => "COMPOUND_MEMBER_ADD",
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OpCode::COMPOUND_MEMBER_SUB => "COMPOUND_MEMBER_SUB",
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OpCode::COMPOUND_MEMBER_MUL => "COMPOUND_MEMBER_MUL",
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OpCode::COMPOUND_MEMBER_DIV => "COMPOUND_MEMBER_DIV",
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OpCode::COMPOUND_MEMBER_MOD => "COMPOUND_MEMBER_MOD",
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OpCode::COMPOUND_MEMBER_EXP => "COMPOUND_MEMBER_EXP",
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OpCode::PROFILE_TYPE => "PROFILE_TYPE",
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OpCode::PROFILE_SHAPE => "PROFILE_SHAPE",
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OpCode::PROFILE_BRANCH => "PROFILE_BRANCH",
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OpCode::PROFILE_CALL => "PROFILE_CALL",
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OpCode::FORK => "FORK",
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OpCode::JOIN => "JOIN",
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OpCode::NOP => "NOP",
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OpCode::HALT => "HALT",
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OpCode::TYPEOF => "TYPEOF",
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OpCode::VOID => "VOID",
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};
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write!(f, "{name}")
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}
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}
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/// 4-byte instruction.
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///
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/// Layout: `[opcode: u8] [rd: u8] [a: u8] [b: u8]`
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/// - `rd` — destination register
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/// - `a` — first source register, or imm16 low byte
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/// - `b` — second source register, or imm16 high byte
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pub type Instr = u32;
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pub fn encode(op: OpCode, rd: u8, a: u8, b: u8) -> Instr {
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((b as Instr) << 24) | ((a as Instr) << 16) | ((rd as Instr) << 8) | (op as Instr)
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}
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pub fn opcode(instr: Instr) -> OpCode {
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OpCode::try_from((instr & 0xFF) as u8).unwrap_or(OpCode::NOP)
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}
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pub fn rd(instr: Instr) -> u8 {
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((instr >> 8) & 0xFF) as u8
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}
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pub fn a(instr: Instr) -> u8 {
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((instr >> 16) & 0xFF) as u8
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}
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pub fn b(instr: Instr) -> u8 {
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((instr >> 24) & 0xFF) as u8
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}
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pub fn imm16(instr: Instr) -> u16 {
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((instr >> 16) & 0xFFFF) as u16
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}
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pub fn offset16(instr: Instr) -> i16 {
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((instr >> 16) & 0xFFFF) as i16
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}
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pub fn encode_jmp(offset: i16) -> Instr {
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let lo = (offset as u16 & 0xFF) as u8;
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let hi = ((offset as u16 >> 8) & 0xFF) as u8;
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encode(OpCode::JMP, 0, lo, hi)
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}
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pub fn encode_jmp_if_false(rd: u8, offset: i16) -> Instr {
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let lo = (offset as u16 & 0xFF) as u8;
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let hi = ((offset as u16 >> 8) & 0xFF) as u8;
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encode(OpCode::JMP_IF_FALSE, rd, lo, hi)
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}
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pub fn encode_jmp_if_true(rd: u8, offset: i16) -> Instr {
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let lo = (offset as u16 & 0xFF) as u8;
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let hi = ((offset as u16 >> 8) & 0xFF) as u8;
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encode(OpCode::JMP_IF_TRUE, rd, lo, hi)
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}
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