For the complete documentation index, see llms.txt. Markdown versions of all pages are available by appending .md to any URL (e.g. /max/get-started.md).
Mojo struct
SelectiveScanUpdate
struct SelectiveScanUpdate[delta_softplus: Bool = False]
Selective scan update operation for autoregressive inference.
Performs a single step of the SSM recurrence for incremental token generation.
Tensor Shapes: - state_out: (batch, dim, dstate) - Updated state output - output: (batch, dim) - Output tensor - state_in: (batch, dim, dstate) - Input state - x: (batch, dim) - Input tensor - dt: (batch, dim) - Time delta tensor - A: (dim, dstate) - State transition matrix - B: (batch, n_groups, dstate) - Input matrix - C: (batch, n_groups, dstate) - Output matrix - D: (dim,) - Skip connection (optional, can be empty) - z: (batch, dim) - Gating tensor (optional, can be empty) - dt_bias: (dim,) - Time delta bias (optional, can be empty)
Parameters
- delta_softplus (
Bool): If True, applies softplus activation to delta values.
Implemented traits
AnyType,
ImplicitlyDestructible
Methods
execute
static execute[dtype: DType, target: StringSlice[StaticConstantOrigin]](state_out: ManagedTensorSlice[Output, static_spec=state_out.static_spec], output: ManagedTensorSlice[Output, static_spec=output.static_spec], state_in: ManagedTensorSlice[Input, static_spec=state_in.static_spec], x: ManagedTensorSlice[Input, static_spec=x.static_spec], dt: ManagedTensorSlice[Input, static_spec=dt.static_spec], A: ManagedTensorSlice[Input, static_spec=A.static_spec], B: ManagedTensorSlice[Input, static_spec=B.static_spec], C: ManagedTensorSlice[Input, static_spec=C.static_spec], D: ManagedTensorSlice[Input, static_spec=D.static_spec], z: ManagedTensorSlice[Input, static_spec=z.static_spec], dt_bias: ManagedTensorSlice[Input, static_spec=dt_bias.static_spec], ctx: DeviceContext)
shape
static shape[dtype: DType](state_in: ManagedTensorSlice[Input, static_spec=state_in.static_spec], x: ManagedTensorSlice[Input, static_spec=x.static_spec], dt: ManagedTensorSlice[Input, static_spec=dt.static_spec], A: ManagedTensorSlice[Input, static_spec=A.static_spec], B: ManagedTensorSlice[Input, static_spec=B.static_spec], C: ManagedTensorSlice[Input, static_spec=C.static_spec], D: ManagedTensorSlice[Input, static_spec=D.static_spec], z: ManagedTensorSlice[Input, static_spec=z.static_spec], dt_bias: ManagedTensorSlice[Input, static_spec=dt_bias.static_spec]) -> Tuple[IndexList[3], IndexList[2]]
Returns:
Tuple[IndexList[3], IndexList[2]]
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