mijit 0.2.4

Experimental JIT compiler generator
Documentation 
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/// Represents the precision of an arithmetic operation.
/// With `P32`, the arithmetic is performed with 32-bit precision, and written
/// into the bottom 32 bits of the destination. The top 32 bits are 0.
#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
#[repr(u8)]
pub enum Precision {
    P32 = 0,
    P64 = 1,
}

impl Precision {
    pub fn bits(self) -> usize { 32 << (self as usize) }
}

//-----------------------------------------------------------------------------

/// Unary arithmetic operations.
#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
#[repr(u8)]
pub enum UnaryOp {
    Abs,
    Negate,
    Not,
    // TODO: Uxt, Sxt (#12).
}

/// Binary arithmetic operations.
#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
#[repr(u8)]
pub enum BinaryOp {
    Add,
    Sub,
    Mul,
    UDiv,
    SDiv,
    Lsl,
    Lsr,
    Asr,
    And,
    Or,
    Xor,
    Lt,
    Ult,
    Eq,
    Max, // TODO: Unsigned too?
    Min, // TODO: Unsigned too?
}

/// The number of bytes transferred by a memory access.
#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
#[repr(u8)]
pub enum Width {
    One = 0,
    Two = 1,
    Four = 2,
    Eight = 3,
}