Preserve column dim type in CSR * Dense
This is necessary so that CSR * Vector == Vector (before it would also yield a DMatrix).
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@ -3,8 +3,10 @@ use crate::csc::CscMatrix;
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use std::ops::{Add, Div, DivAssign, Mul, MulAssign, Sub, Neg};
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use crate::ops::serial::{spadd_csr_prealloc, spadd_csc_prealloc, spadd_pattern, spmm_csr_pattern, spmm_csr_prealloc, spmm_csc_prealloc, spmm_csc_dense, spmm_csr_dense, spmm_csc_pattern};
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use nalgebra::{ClosedAdd, ClosedMul, ClosedSub, ClosedDiv, Scalar, Matrix, Dim,
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DMatrixSlice, DMatrix, Dynamic};
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use nalgebra::{ClosedAdd, ClosedMul, ClosedSub, ClosedDiv, Scalar, Matrix, MatrixMN, Dim,
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DMatrixSlice, DMatrixSliceMut, DMatrix, Dynamic, DefaultAllocator, U1};
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use nalgebra::allocator::{Allocator};
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use nalgebra::constraint::{DimEq, ShapeConstraint};
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use num_traits::{Zero, One};
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use crate::ops::{Op};
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use nalgebra::base::storage::Storage;
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@ -265,20 +267,35 @@ macro_rules! impl_spmm_cs_dense {
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($matrix_type:ident, $spmm_fn:ident) => {
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impl<'a, T, R, C, S> Mul<&'a Matrix<T, R, C, S>> for &'a $matrix_type<T>
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where
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&'a Matrix<T, R, C, S>: Into<DMatrixSlice<'a, T>>,
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T: Scalar + ClosedMul + ClosedAdd + ClosedSub + ClosedDiv + Neg + Zero + One,
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R: Dim,
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C: Dim,
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S: Storage<T, R, C>,
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DefaultAllocator: Allocator<T, Dynamic, C>,
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// TODO: Is it possible to simplify these bounds?
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ShapeConstraint:
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// Bounds so that we can turn MatrixMN<T, Dynamic, C> into a DMatrixSliceMut
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DimEq<U1, <<DefaultAllocator as Allocator<T, Dynamic, C>>::Buffer as Storage<T, Dynamic, C>>::RStride>
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+ DimEq<C, Dynamic>
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+ DimEq<Dynamic, <<DefaultAllocator as Allocator<T, Dynamic, C>>::Buffer as Storage<T, Dynamic, C>>::CStride>
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// Bounds so that we can turn &Matrix<T, R, C, S> into a DMatrixSlice
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+ DimEq<U1, S::RStride>
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+ DimEq<R, Dynamic>
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+ DimEq<Dynamic, S::CStride>
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{
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type Output = DMatrix<T>;
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// We need the column dimension to be generic, so that if RHS is a vector, then
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// we also get a vector (and not a matrix)
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type Output = MatrixMN<T, Dynamic, C>;
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fn mul(self, rhs: &'a Matrix<T, R, C, S>) -> Self::Output {
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let rhs = rhs.into();
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// let rhs = rhs.into();
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let (_, ncols) = rhs.data.shape();
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let nrows = Dynamic::new(self.nrows());
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let mut result = Matrix::zeros_generic(nrows, ncols);
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$spmm_fn(T::zero(), &mut result, T::one(), Op::NoOp(self), Op::NoOp(rhs));
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let mut result = MatrixMN::<T, Dynamic, C>::zeros_generic(nrows, ncols);
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{
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// let result: DMatrixSliceMut<_> = (&mut result).into();
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$spmm_fn(T::zero(), &mut result, T::one(), Op::NoOp(self), Op::NoOp(rhs));
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}
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result
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}
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}
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