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use crate::{Dim, Dtype};
pub trait MatMulImpl
where
Self: Dtype,
{
#[allow(clippy::too_many_arguments)]
fn matmul<M: Dim, K: Dim, N: Dim>(
dims: (M, K, N),
accum: bool,
ap: *const Self,
a_strides: [usize; 2],
bp: *const Self,
b_strides: [usize; 2],
cp: *mut Self,
c_strides: [usize; 2],
);
}
#[allow(unused)]
#[allow(clippy::too_many_arguments)]
fn naive_gemm<F: Dtype, M: Dim, K: Dim, N: Dim>(
(m, k, n): (M, K, N),
accum: bool,
ap: *const F,
a_strides: [usize; 2],
bp: *const F,
b_strides: [usize; 2],
cp: *mut F,
c_strides: [usize; 2],
) {
//println!("naive_gemm()");
for i_m in 0..m.size() {
for i_k in 0..k.size() {
for i_n in 0..n.size() {
unsafe {
let a = *ap.add(a_strides[0] * i_m + a_strides[1] * i_k);
let b = *bp.add(b_strides[0] * i_k + b_strides[1] * i_n);
let c = cp.add(c_strides[0] * i_m + c_strides[1] * i_n);
// println!(
// "({},{},{}) {:?} * {:?} = {:?} ({}, {}, {})",
// i_m,
// i_k,
// i_n,
// a,
// b,
// a * b,
// a_strides[0] * i_m + a_strides[1] * i_k,
// b_strides[0] * i_k + b_strides[1] * i_n,
// c_strides[0] * i_m + c_strides[1] * i_n
// );
if accum {
*c += a * b;
} else {
*c = a * b;
}
}
}
}
}
}
impl MatMulImpl for f32 {
#[inline]
fn matmul<M: Dim, K: Dim, N: Dim>(
(m, k, n): (M, K, N),
accum: bool,
ap: *const f32,
astr: [usize; 2],
bp: *const f32,
bstr: [usize; 2],
cp: *mut f32,
cstr: [usize; 2],
) {
#[cfg(not(feature = "gemm"))]
naive_gemm((m, k, n), accum, ap, astr, bp, bstr, cp, cstr);
#[cfg(feature = "gemm")]
unsafe {
gemm::gemm(
m.size(),
n.size(),
k.size(),
cp,
cstr[1] as isize,
cstr[0] as isize,
accum,
ap,
astr[1] as isize,
astr[0] as isize,
bp,
bstr[1] as isize,
bstr[0] as isize,
if accum { 1.0 } else { 0.0 },
1.0,
false,
false,
false,
gemm::Parallelism::Rayon((rayon::current_num_threads() / 2).max(2)),
)
}
}
}
impl MatMulImpl for f64 {
#[inline]
fn matmul<M: Dim, K: Dim, N: Dim>(
(m, k, n): (M, K, N),
accum: bool,
ap: *const f64,
astr: [usize; 2],
bp: *const f64,
bstr: [usize; 2],
cp: *mut f64,
cstr: [usize; 2],
) {
#[cfg(not(feature = "gemm"))]
naive_gemm((m, k, n), accum, ap, astr, bp, bstr, cp, cstr);
#[cfg(feature = "gemm")]
unsafe {
gemm::gemm(
m.size(),
n.size(),
k.size(),
cp,
cstr[1] as isize,
cstr[0] as isize,
accum,
ap,
astr[1] as isize,
astr[0] as isize,
bp,
bstr[1] as isize,
bstr[0] as isize,
if accum { 1.0 } else { 0.0 },
1.0,
false,
false,
false,
gemm::Parallelism::Rayon((rayon::current_num_threads() / 2).max(2)),
)
}
}
}