cubecl-core 0.11.0-pre.1

CubeCL core create
Documentation 
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use core::ops::{Deref, DerefMut};

use super::SliceExpand;
use crate::{
    self as cubecl,
    frontend::{container::slice, ranges::range},
};
use crate::{ir::Scope, prelude::*, unexpanded};
use cubecl_common::tf32;

pub(crate) fn is_tf32<C: CubePrimitive, T: CubePrimitive>(scope: &Scope) -> bool {
    let ty_c = C::__expand_as_type(scope).storage_type();
    let ty_t = T::__expand_as_type(scope).storage_type();
    let ty_f32 = f32::__expand_as_type(scope).storage_type();
    let ty_tf32 = tf32::__expand_as_type(scope).storage_type();

    (ty_c == ty_f32 && ty_t == ty_tf32) || (ty_c == ty_tf32 && ty_t == ty_f32)
}

type ArrayExpand<E> = NativeExpand<Array<E>>;

impl<E: CubePrimitive, T: Deref<Target = SliceExpand<E>> + DerefMut> SliceOperatorExpand<E> for T {
    fn __expand_slice_method(
        &self,
        scope: &Scope,
        start: NativeExpand<usize>,
        end: NativeExpand<usize>,
    ) -> &SliceExpand<E> {
        self.deref().__expand_slice_method(scope, start, end)
    }

    fn __expand_slice_mut_method(
        &mut self,
        scope: &Scope,
        start: NativeExpand<usize>,
        end: NativeExpand<usize>,
    ) -> &mut SliceExpand<E> {
        self.deref_mut()
            .__expand_slice_mut_method(scope, start, end)
    }
}

impl<E: CubePrimitive> SliceOperator<E> for Shared<[E]> {}
impl<E: CubePrimitive> SliceOperator<E> for Tensor<E> {}
impl<E: CubePrimitive> SliceOperator<E> for Array<E> {}

#[cube]
impl<E: CubePrimitive> Array<E> {
    pub fn as_slice(&self) -> &[E] {
        intrinsic!(|_| self.deref())
    }

    pub fn as_mut_slice(&mut self) -> &mut [E] {
        intrinsic!(|_| self.deref_mut())
    }
}

#[cube]
impl<E: CubePrimitive> Shared<[E]> {
    pub fn as_slice(&self) -> &[E] {
        intrinsic!(|_| self.deref())
    }

    pub fn as_mut_slice(&mut self) -> &mut [E] {
        intrinsic!(|_| self.deref_mut())
    }
}

impl<E: CubePrimitive> SliceOperator<E> for [E] {}
impl<E: CubePrimitive> SliceOperatorExpand<E> for SliceExpand<E> {
    fn __expand_slice_method(
        &self,
        scope: &Scope,
        start: NativeExpand<usize>,
        end: NativeExpand<usize>,
    ) -> &SliceExpand<E> {
        let length = end.__expand_sub_method(scope, start);
        let list = self.__extract_list(scope);
        let offset = self.__extract_offset(scope);
        let offset = start.__expand_add_method(scope, offset);
        let slice = slice::from_raw_parts(scope, list, offset, length);
        scope.create_kernel_ref(slice)
    }

    fn __expand_slice_mut_method(
        &mut self,
        scope: &Scope,
        start: NativeExpand<usize>,
        end: NativeExpand<usize>,
    ) -> &mut SliceExpand<E> {
        let length = end.__expand_sub_method(scope, start);
        let list = self.__extract_list(scope);
        let offset = self.__extract_offset(scope);
        let offset = start.__expand_add_method(scope, offset);

        let slice = slice::from_raw_parts(scope, list, offset, length);
        scope.create_kernel_ref(slice)
    }
}

#[cube]
pub trait SliceOperator<E: CubePrimitive> {
    /// Return a read-only view of all elements comprise between the `start` and `end` indices.
    /// In `checked` mode, if the `end` index is out-of-bound, it is replaced by
    /// the length of `self`.
    #[allow(unused_variables)]
    fn slice(&self, start: usize, end: usize) -> &[E] {
        unexpanded!()
    }

    /// Return a read-write view of all elements comprise between the `start` and `end` indices.
    /// In `checked` mode, if the `end` index is out-of-bound, it is replaced by
    /// the length of `self`.
    #[allow(unused_variables)]
    fn slice_mut(&mut self, start: usize, end: usize) -> &mut [E] {
        unexpanded!()
    }
}

// Simple heuristic
const MEMCPY_UNROLL_LIMIT: usize = 8;

impl<E: CubePrimitive> SliceExpand<E> {
    pub fn __expand_copy_from_slice_method(&mut self, scope: &Scope, source: &SliceExpand<E>) {
        let len = source.__expand_len_method(scope);
        let unroll = source
            .const_len()
            .is_some_and(|it| it <= MEMCPY_UNROLL_LIMIT);
        for_expand(
            scope,
            range::expand(scope, 0usize.into_expand(scope), len),
            unroll,
            |scope, idx| {
                copy::expand(
                    scope,
                    source.__expand_index_method(scope, idx),
                    self.__expand_index_mut_method(scope, idx),
                );
            },
        );
    }
}