rasp/src/vm/reg.rs

macro_rules! registers {
    {
        $($variant:ident = $value:expr),* $(,)?
    } => {
        pub type Reg = u8;

        $(
            pub const $variant: Reg = $value;
        )*

        pub fn reg_name(reg: Reg) -> Option<&'static str> {
            match reg {
                $(
                    $value => Some(stringify!($variant)),
                )*
                _ => None,
            }
        }
    };
}

registers! {
    // https://crates.io/crates/packed_struct
    // TODO : check this muffugin shit out!!

    // Instruction pointer
    IP = 0,

    // Stack pointer
    SP = 1,

    // Frame pointer
    FP = 2,

    // Flags
    FLAGS = 3,

    // Zero
    NULL = 4,

    UNUSED01 = 5,
    UNUSED02 = 6,
    UNUSED03 = 7,
    UNUSED04 = 8,
    UNUSED05 = 9,
    UNUSED06 = 10,
    UNUSED07 = 11,
    UNUSED08 = 12,

    // General status code
    STATUS = 13,

    R00 = 14,
    R01 = 15,
    R02 = 16,
    R03 = 17,
    R04 = 18,
    R05 = 19,
    R06 = 20,
    R07 = 21,
    R08 = 22,
    R09 = 23,
    R10 = 24,
    R11 = 25,
    R12 = 26,
    R13 = 27,
    R14 = 28,
    R15 = 29,
    R16 = 30,
    R17 = 31,
    R18 = 32,
    R19 = 33,
    R20 = 34,
    R21 = 35,
    R22 = 36,
    R23 = 37,
    R24 = 38,
    R25 = 39,
    R26 = 40,
    R27 = 41,
    R28 = 42,
    R29 = 43,
    R30 = 44,
    R31 = 45,
    R32 = 46,
    R33 = 47,
    R34 = 48,
    R35 = 49,
    R36 = 50,
    R37 = 51,
    R38 = 52,
    R39 = 53,
    R40 = 54,
    R41 = 55,
    R42 = 56,
    R43 = 57,
    R44 = 58,
    R45 = 59,
    R46 = 60,
    R47 = 61,
    R48 = 62,
    R49 = 63,
}

pub const LAST_REG: Reg = R49;