use crate::asm::data::{Rd, RdObj, Wr};
use crate::asm::data::literal::{DebugMsg, Label, RoutineName};
use crate::asm::instr::{Cond, Op};

#[derive(Debug)]
pub enum BuiltinOp {
    /// Do nothing
    Nop,
    /// Stop execution
    Halt,
    /// Mark a jump target.
    Label(Label),
    /// Jump to a label
    Jump(Label),
    /// Jump to a label if a flag is set
    JumpIf(Cond, Label),
    /// Far jump to a label if a flag is set
    FarJumpIf(Cond, Label),
    /// Mark a far jump target (can be jumped to from another routine).
    /// This label is preserved in optimized code.
    FarLabel(Label),
    /// Jump to a label that can be in another function
    FarJump(Label),
    /// Call a routine with arguments.
    /// The arguments are passed as argX. Return values are stored in resX registers.
    Call(RoutineName, Vec<Rd>),
    /// Exit the current routine with return values
    Ret(Vec<Rd>),
    /// Mark a routine entry point (call target).
    /// Kept in the low level instruction file for position-independent code
    Routine(RoutineName),
    /// Skip backward or forward
    Skip(Rd),
    /// Skip if a flag is set
    SkipIf(Cond, Rd),
    /// Deny jumps, skips and run across this address, producing a run-time fault with a message.
    Barrier(Option<DebugMsg>),
    /// Generate a run-time fault with a debugger message
    Fault(Option<DebugMsg>),
    /// Deallocate an object.
    /// The object is released and the handle becomes invalid.
    Drop(RdObj),
    /// Copy value
    Move { dst: Wr, src: Rd },
    /// Store runtime status to a register
    StoreStatus { dst: Wr },
    /// Load runtime status from a register
    LoadStatus { src: Rd },
}

impl From<BuiltinOp> for Op {
    fn from(bo: BuiltinOp) -> Self {
        Op::BuiltIn(bo)
    }
}