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//! Frozen binary-operation discriminants for primitive operation metadata.
// TAG RESERVATIONS: Add=0x01, Sub=0x02, Mul=0x03, Div=0x04, Mod=0x05,
// BitAnd=0x06, BitOr=0x07, BitXor=0x08, Shl=0x09, Shr=0x0A, Eq=0x0B,
// Ne=0x0C, Lt=0x0D, Gt=0x0E, AbsDiff=0x0F, Le=0x10, Ge=0x11,
// And=0x12, Or=0x13, Min=0x14, Max=0x15, SaturatingAdd=0x16,
// SaturatingSub=0x17, SaturatingMul=0x18, Shuffle=0x19, Ballot=0x1A,
// WaveReduce=0x1B, WaveBroadcast=0x1C, RotateLeft=0x1D, WrappingAdd=0x1F, WrappingSub=0x20,
// RotateRight=0x1E, MulHigh=0x21, 0x22..=0x7F reserved, Opaque=0x80.
use crate::extension::ExtensionBinOpId;
/// Computational intensity class for a binary operation.
#[derive(
Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, serde::Deserialize, serde::Serialize,
)]
pub enum OpIntensity {
/// Zero-cost (bitcasts, aliasing).
Free,
/// Single-cycle ALU (Add, Sub, Bitwise).
Light,
/// Multi-cycle ALU (Mul, Div, Mod).
Medium,
/// High latency / Register heavy (transcendentals, subgroup ops).
Heavy,
}
/// Binary operation kind in the frozen data contract.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, serde::Deserialize, serde::Serialize)]
#[non_exhaustive]
pub enum BinOp {
/// Addition.
Add,
/// Subtraction.
Sub,
/// Multiplication.
Mul,
/// Division.
Div,
/// Remainder.
Mod,
/// Wrapping addition.
WrappingAdd,
/// Wrapping subtraction.
WrappingSub,
/// Bitwise AND.
BitAnd,
/// Bitwise OR.
BitOr,
/// Bitwise XOR.
BitXor,
/// Shift left.
Shl,
/// Shift right.
Shr,
/// Equality.
Eq,
/// Inequality.
Ne,
/// Less than.
Lt,
/// Greater than.
Gt,
/// Less than or equal.
Le,
/// Greater than or equal.
Ge,
/// Logical AND.
And,
/// Logical OR.
Or,
/// Unsigned absolute difference.
AbsDiff,
/// Minimum (f32).
Min,
/// Maximum (f32).
Max,
/// Saturating addition.
SaturatingAdd,
/// Saturating subtraction.
SaturatingSub,
/// Saturating multiplication.
SaturatingMul,
/// GPU subgroup shuffle.
Shuffle,
/// GPU subgroup ballot.
Ballot,
/// GPU subgroup reduction.
WaveReduce,
/// GPU subgroup broadcast.
WaveBroadcast,
/// Rotate-left.
RotateLeft,
/// Rotate-right.
RotateRight,
/// Unsigned multiply-high: upper 32 bits of `(left × right)` treated
/// as a 64-bit product. Enables Granlund-Montgomery strength reduction
/// of integer division by constant to 2 instructions.
MulHigh,
/// Extension-declared binary operator.
Opaque(ExtensionBinOpId),
}
impl_builtin_wire_tag!(BinOp, Opaque, {
Add => 0x01,
Sub => 0x02,
Mul => 0x03,
Div => 0x04,
Mod => 0x05,
BitAnd => 0x06,
BitOr => 0x07,
BitXor => 0x08,
Shl => 0x09,
Shr => 0x0A,
Eq => 0x0B,
Ne => 0x0C,
Lt => 0x0D,
Gt => 0x0E,
AbsDiff => 0x0F,
Le => 0x10,
Ge => 0x11,
And => 0x12,
Or => 0x13,
Min => 0x14,
Max => 0x15,
SaturatingAdd => 0x16,
SaturatingSub => 0x17,
SaturatingMul => 0x18,
Shuffle => 0x19,
Ballot => 0x1A,
WaveReduce => 0x1B,
WaveBroadcast => 0x1C,
RotateLeft => 0x1D,
RotateRight => 0x1E,
WrappingAdd => 0x1F,
WrappingSub => 0x20,
MulHigh => 0x21,
});
impl BinOp {
/// Return the static computational intensity of this operation.
#[must_use]
pub fn intensity(&self) -> OpIntensity {
match self {
Self::Add
| Self::Sub
| Self::BitAnd
| Self::BitOr
| Self::BitXor
| Self::Shl
| Self::Shr
| Self::WrappingAdd
| Self::WrappingSub
| Self::RotateLeft
| Self::RotateRight
| Self::SaturatingAdd
| Self::SaturatingSub
| Self::SaturatingMul
| Self::AbsDiff => OpIntensity::Light,
Self::Ballot | Self::Shuffle | Self::WaveReduce | Self::WaveBroadcast => {
OpIntensity::Heavy
}
_ => OpIntensity::Medium,
}
}
}