Trait InstructionExt

Source

pub trait InstructionExt {
Show 16 methods    // Required methods
    fn opcode(&self) -> OpCode;
    fn arg_a(&self) -> i32;
    fn arg_b(&self) -> i32;
    fn arg_c(&self) -> i32;
    fn arg_k(&self) -> i32;
    fn arg_ax(&self) -> i32;
    fn arg_bx(&self) -> i32;
    fn arg_s_b(&self) -> i32;
    fn arg_s_c(&self) -> i32;
    fn arg_s_j(&self) -> i32;
    fn arg_s_bx(&self) -> i32;
    fn test_k(&self) -> bool;
    fn test_a_mode(&self) -> bool;
    fn is_mm_mode(&self) -> bool;
    fn is_vararg_prep(&self) -> bool;
    fn is_in_top(&self) -> bool;
}

Expand description

TODO(phase-b): Instruction accessor extension trait. The real per-mode decode helpers live in lua-types::opcode once translated. Stubbed locally so call sites resolve; bodies are inferred from lopcodes.h macro shapes.

Required Methods§

Source

fn is_in_top(&self) -> bool

Dyn Compatibility§

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types§

Source §

impl InstructionExt for Instruction

Source §

fn opcode(&self) -> OpCode

C: GET_OPCODE(i) = (OpCode)((i) >> POS_OP & MASK1(SIZE_OP,0)).

The 83-arm match looks expensive, but because OpCode is #[repr(u8)] with explicit discriminants 0..=82 matching each match arm’s integer key exactly, LLVM compiles this to a single bounds check + identity cast — no jump table, no memory indirection. The previous array-lookup form forced an extra OPCODE_TABLE byte load per dispatch tick that LLVM could not see through.

Source §