pub fn to_row_major<'a, S: Data<Elem = f64>>(
a: &'a ArrayBase<S, Ix2>,
) -> Cow<'a, [f64]>Expand description
Borrow (or pack) a 2D array’s buffer in ROW-major (C) order.
The col-major dual of to_col_major: when the input is already
C-contiguous its raw buffer IS the row-major flat layout, so this borrows
it with no allocation or copy. Non-contiguous / F-order inputs are packed
row by row.
This is the host-transpose-free upload path. A row-major (r × c) buffer,
reinterpreted as a column-major buffer, is exactly the transpose (c × r)
of the logical matrix — which is what the swapped-operand cuBLAS GEMM
(Cᵀ = Bᵀ·Aᵀ) consumes, letting both the design upload and the result
download skip the O(r·c) scalar permutation that dominated tall-skinny
GEMMs on the host.