use crate::opcode::OpCode; /// Specification for a single OpCode. /// All JMP/JMP_IF_* immediate are u32 absolute offsets from function start. #[derive(Debug, Clone, Copy, PartialEq, Eq)] pub struct OpcodeSpec { pub name: &'static str, pub imm_bytes: u8, // immediate payload size (decode) pub pops: u16, // slots popped pub pushes: u16, // slots pushed pub is_branch: bool, // has a control-flow target pub is_terminator: bool, // ends basic block: JMP/RET/TRAP/HALT pub may_trap: bool, // runtime trap possible /// Marks this opcode as a VM safepoint. Used by GC/scheduler policies. pub is_safepoint: bool, } pub trait OpCodeSpecExt { fn spec(&self) -> OpcodeSpec; } impl OpCodeSpecExt for OpCode { fn spec(&self) -> OpcodeSpec { match self { OpCode::Nop => OpcodeSpec { name: "NOP", imm_bytes: 0, pops: 0, pushes: 0, is_branch: false, is_terminator: false, may_trap: false, is_safepoint: false, }, OpCode::Halt => OpcodeSpec { name: "HALT", imm_bytes: 0, pops: 0, pushes: 0, is_branch: false, is_terminator: true, may_trap: false, is_safepoint: false, }, OpCode::Jmp => OpcodeSpec { name: "JMP", imm_bytes: 4, pops: 0, pushes: 0, is_branch: true, is_terminator: true, may_trap: false, is_safepoint: false, }, OpCode::JmpIfFalse => OpcodeSpec { name: "JMP_IF_FALSE", imm_bytes: 4, pops: 1, pushes: 0, is_branch: true, is_terminator: false, may_trap: true, is_safepoint: false, }, OpCode::JmpIfTrue => OpcodeSpec { name: "JMP_IF_TRUE", imm_bytes: 4, pops: 1, pushes: 0, is_branch: true, is_terminator: false, may_trap: true, is_safepoint: false, }, OpCode::Trap => OpcodeSpec { name: "TRAP", imm_bytes: 0, pops: 0, pushes: 0, is_branch: false, is_terminator: true, may_trap: true, is_safepoint: false, }, OpCode::PushConst => OpcodeSpec { name: "PUSH_CONST", imm_bytes: 4, pops: 0, pushes: 1, is_branch: false, is_terminator: false, may_trap: false, is_safepoint: false, }, OpCode::Pop => OpcodeSpec { name: "POP", imm_bytes: 0, pops: 1, pushes: 0, is_branch: false, is_terminator: false, may_trap: false, is_safepoint: false, }, OpCode::PopN => OpcodeSpec { name: "POP_N", imm_bytes: 4, pops: 0, pushes: 0, is_branch: false, is_terminator: false, may_trap: false, is_safepoint: false, }, OpCode::Dup => OpcodeSpec { name: "DUP", imm_bytes: 0, pops: 1, pushes: 2, is_branch: false, is_terminator: false, may_trap: false, is_safepoint: false, }, OpCode::Swap => OpcodeSpec { name: "SWAP", imm_bytes: 0, pops: 2, pushes: 2, is_branch: false, is_terminator: false, may_trap: false, is_safepoint: false, }, OpCode::PushI64 => OpcodeSpec { name: "PUSH_I64", imm_bytes: 8, pops: 0, pushes: 1, is_branch: false, is_terminator: false, may_trap: false, is_safepoint: false, }, OpCode::PushF64 => OpcodeSpec { name: "PUSH_F64", imm_bytes: 8, pops: 0, pushes: 1, is_branch: false, is_terminator: false, may_trap: false, is_safepoint: false, }, OpCode::PushBool => OpcodeSpec { name: "PUSH_BOOL", imm_bytes: 1, pops: 0, pushes: 1, is_branch: false, is_terminator: false, may_trap: false, is_safepoint: false, }, OpCode::PushI32 => OpcodeSpec { name: "PUSH_I32", imm_bytes: 4, pops: 0, pushes: 1, is_branch: false, is_terminator: false, may_trap: false, is_safepoint: false, }, OpCode::PushBounded => OpcodeSpec { name: "PUSH_BOUNDED", imm_bytes: 4, pops: 0, pushes: 1, is_branch: false, is_terminator: false, may_trap: true, is_safepoint: false, }, OpCode::Add => OpcodeSpec { name: "ADD", imm_bytes: 0, pops: 2, pushes: 1, is_branch: false, is_terminator: false, may_trap: true, is_safepoint: false, }, OpCode::Sub => OpcodeSpec { name: "SUB", imm_bytes: 0, pops: 2, pushes: 1, is_branch: false, is_terminator: false, may_trap: true, is_safepoint: false, }, OpCode::Mul => OpcodeSpec { name: "MUL", imm_bytes: 0, pops: 2, pushes: 1, is_branch: false, is_terminator: false, may_trap: true, is_safepoint: false, }, OpCode::Div => OpcodeSpec { name: "DIV", imm_bytes: 0, pops: 2, pushes: 1, is_branch: false, is_terminator: false, may_trap: true, is_safepoint: false, }, OpCode::Mod => OpcodeSpec { name: "MOD", imm_bytes: 0, pops: 2, pushes: 1, is_branch: false, is_terminator: false, may_trap: true, is_safepoint: false, }, OpCode::BoundToInt => OpcodeSpec { name: "BOUND_TO_INT", imm_bytes: 0, pops: 1, pushes: 1, is_branch: false, is_terminator: false, may_trap: false, is_safepoint: false, }, OpCode::IntToBoundChecked => OpcodeSpec { name: "INT_TO_BOUND_CHECKED", imm_bytes: 0, pops: 1, pushes: 1, is_branch: false, is_terminator: false, may_trap: true, is_safepoint: false, }, OpCode::Eq => OpcodeSpec { name: "EQ", imm_bytes: 0, pops: 2, pushes: 1, is_branch: false, is_terminator: false, may_trap: false, is_safepoint: false, }, OpCode::Neq => OpcodeSpec { name: "NEQ", imm_bytes: 0, pops: 2, pushes: 1, is_branch: false, is_terminator: false, may_trap: false, is_safepoint: false, }, OpCode::Lt => OpcodeSpec { name: "LT", imm_bytes: 0, pops: 2, pushes: 1, is_branch: false, is_terminator: false, may_trap: false, is_safepoint: false, }, OpCode::Gt => OpcodeSpec { name: "GT", imm_bytes: 0, pops: 2, pushes: 1, is_branch: false, is_terminator: false, may_trap: false, is_safepoint: false, }, OpCode::And => OpcodeSpec { name: "AND", imm_bytes: 0, pops: 2, pushes: 1, is_branch: false, is_terminator: false, may_trap: false, is_safepoint: false, }, OpCode::Or => OpcodeSpec { name: "OR", imm_bytes: 0, pops: 2, pushes: 1, is_branch: false, is_terminator: false, may_trap: false, is_safepoint: false, }, OpCode::Not => OpcodeSpec { name: "NOT", imm_bytes: 0, pops: 1, pushes: 1, is_branch: false, is_terminator: false, may_trap: false, is_safepoint: false, }, OpCode::BitAnd => OpcodeSpec { name: "BIT_AND", imm_bytes: 0, pops: 2, pushes: 1, is_branch: false, is_terminator: false, may_trap: false, is_safepoint: false, }, OpCode::BitOr => OpcodeSpec { name: "BIT_OR", imm_bytes: 0, pops: 2, pushes: 1, is_branch: false, is_terminator: false, may_trap: false, is_safepoint: false, }, OpCode::BitXor => OpcodeSpec { name: "BIT_XOR", imm_bytes: 0, pops: 2, pushes: 1, is_branch: false, is_terminator: false, may_trap: false, is_safepoint: false, }, OpCode::Shl => OpcodeSpec { name: "SHL", imm_bytes: 0, pops: 2, pushes: 1, is_branch: false, is_terminator: false, may_trap: false, is_safepoint: false, }, OpCode::Shr => OpcodeSpec { name: "SHR", imm_bytes: 0, pops: 2, pushes: 1, is_branch: false, is_terminator: false, may_trap: false, is_safepoint: false, }, OpCode::Lte => OpcodeSpec { name: "LTE", imm_bytes: 0, pops: 2, pushes: 1, is_branch: false, is_terminator: false, may_trap: false, is_safepoint: false, }, OpCode::Gte => OpcodeSpec { name: "GTE", imm_bytes: 0, pops: 2, pushes: 1, is_branch: false, is_terminator: false, may_trap: false, is_safepoint: false, }, OpCode::Neg => OpcodeSpec { name: "NEG", imm_bytes: 0, pops: 1, pushes: 1, is_branch: false, is_terminator: false, may_trap: false, is_safepoint: false, }, OpCode::GetGlobal => OpcodeSpec { name: "GET_GLOBAL", imm_bytes: 4, pops: 0, pushes: 1, is_branch: false, is_terminator: false, may_trap: false, is_safepoint: false, }, OpCode::SetGlobal => OpcodeSpec { name: "SET_GLOBAL", imm_bytes: 4, pops: 1, pushes: 0, is_branch: false, is_terminator: false, may_trap: false, is_safepoint: false, }, OpCode::GetLocal => OpcodeSpec { name: "GET_LOCAL", imm_bytes: 4, pops: 0, pushes: 1, is_branch: false, is_terminator: false, may_trap: false, is_safepoint: false, }, OpCode::SetLocal => OpcodeSpec { name: "SET_LOCAL", imm_bytes: 4, pops: 1, pushes: 0, is_branch: false, is_terminator: false, may_trap: false, is_safepoint: false, }, OpCode::Call => OpcodeSpec { name: "CALL", imm_bytes: 4, pops: 0, pushes: 0, is_branch: false, is_terminator: false, may_trap: true, is_safepoint: false, }, OpCode::Ret => OpcodeSpec { name: "RET", imm_bytes: 0, pops: 0, pushes: 0, is_branch: false, is_terminator: true, may_trap: false, is_safepoint: false, }, OpCode::PushScope => OpcodeSpec { name: "PUSH_SCOPE", imm_bytes: 0, pops: 0, pushes: 0, is_branch: false, is_terminator: false, may_trap: false, is_safepoint: false, }, OpCode::PopScope => OpcodeSpec { name: "POP_SCOPE", imm_bytes: 0, pops: 0, pushes: 0, is_branch: false, is_terminator: false, may_trap: false, is_safepoint: false, }, OpCode::Syscall => OpcodeSpec { name: "SYSCALL", imm_bytes: 4, pops: 0, pushes: 0, is_branch: false, is_terminator: false, may_trap: true, is_safepoint: false, }, OpCode::FrameSync => OpcodeSpec { name: "FRAME_SYNC", imm_bytes: 0, pops: 0, pushes: 0, is_branch: false, is_terminator: false, may_trap: false, is_safepoint: true, }, } } } #[cfg(test)] mod tests { use super::*; // Infer the numeric range from the TryFrom mapping used in opcode.rs tests // by scanning a plausible range (0..1024) and keeping all successful decodes. #[test] fn every_opcode_has_spec_and_imm_defined() { let mut count = 0usize; for val in 0u16..=1023u16 { if let Ok(op) = OpCode::try_from(val) { let spec = op.spec(); // Access all fields to ensure they are present and not optimized away let _ = ( spec.name, spec.imm_bytes, spec.pops, spec.pushes, spec.is_branch, spec.is_terminator, spec.may_trap, ); count += 1; } } assert!(count > 0, "No opcodes were found via OpCode::try_from"); } }