Enum AluOp 

pub enum AluOp {
    Add,
    Sub,
    Mul,
    And,
    Or,
    Xor,
    Shl,
    Shr,
    UShr,
}

The straight-line ALU ops a dispatch-free residual is built from (the alu.v ops, each already proven ≡ the VM). 64-bit signed, wrapping — bit-identical to the VM’s Int.

Variants

Add

Sub

Mul

And

Bitwise AND / OR / XOR — combinational, bit-identical to the VM’s Int bitwise ops (and, for 0/1 Bool operands, to the logical spellings, since &/|/^ agree with &&/||/xor on {0,1}).

Or

Xor

Shl

Logical shift left a << (b & 63) (the VM’s wrapping_shl, count masked mod 64).

Shr

ARITHMETIC shift right a >>> (b & 63) (the VM’s wrapping_shr on the signed Int).

UShr

LOGICAL (unsigned) shift right (a as u64) >> (b & 63) — zero-fill, the Word64/Keccak word64Shr (wrapping_shr on the u64 value). Distinct from AluOp::Shr, which sign-extends: they agree only while the high bit is clear (why the Word32 lane, always in 0..2³², reuses Shr), but a Word64 value with bit 63 set needs this zero-fill form.

Implementations

impl AluOp

pub fn verilog(&self, a: &str, b: &str) -> String

pub fn eval(&self, a: i64, b: i64) -> i64

impl AluOp

pub fn eval_checked(&self, a: i64, b: i64) -> Result<i64, Divergence>

The VM’s value for this op on two Ints, or the divergence that keeps the word from being it. + − × are exact in the VM (they promote); the bitwise ops and the masked shifts are the VM’s own i64 ops.

Trait Implementations

impl Clone for AluOp

fn clone(&self) -> AluOp

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for AluOp

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for AluOp

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Hash for AluOp

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for AluOp

fn cmp(&self, other: &AluOp) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for AluOp

fn eq(&self, other: &AluOp) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for AluOp

fn partial_cmp(&self, other: &AluOp) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for AluOp

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for AluOp

impl Eq for AluOp

impl StructuralPartialEq for AluOp