mlx/mlx/backend/metal/kernels/binary.h
Awni Hannun 4f9f9ebb6f
Faster Metal unary and binary for general case (#1431)
* faster unary and binary for general case

* update ternary + jit fix

* fix jit

* unary work per thread
2024-09-25 12:07:43 -07:00

140 lines
4.1 KiB
C++

// Copyright © 2024 Apple Inc.
template <typename T, typename U, typename Op>
[[kernel]] void binary_ss(
device const T* a,
device const T* b,
device U* c,
uint index [[thread_position_in_grid]]) {
c[index] = Op()(a[0], b[0]);
}
template <typename T, typename U, typename Op>
[[kernel]] void binary_sv(
device const T* a,
device const T* b,
device U* c,
uint index [[thread_position_in_grid]]) {
c[index] = Op()(a[0], b[index]);
}
template <typename T, typename U, typename Op>
[[kernel]] void binary_vs(
device const T* a,
device const T* b,
device U* c,
uint index [[thread_position_in_grid]]) {
c[index] = Op()(a[index], b[0]);
}
template <typename T, typename U, typename Op>
[[kernel]] void binary_vv(
device const T* a,
device const T* b,
device U* c,
uint index [[thread_position_in_grid]]) {
c[index] = Op()(a[index], b[index]);
}
template <typename T, typename U, typename Op>
[[kernel]] void binary_sv2(
device const T* a,
device const T* b,
device U* c,
uint2 index [[thread_position_in_grid]],
uint2 grid_dim [[threads_per_grid]]) {
size_t offset = index.x + grid_dim.x * size_t(index.y);
c[offset] = Op()(a[0], b[offset]);
}
template <typename T, typename U, typename Op>
[[kernel]] void binary_vs2(
device const T* a,
device const T* b,
device U* c,
uint2 index [[thread_position_in_grid]],
uint2 grid_dim [[threads_per_grid]]) {
size_t offset = index.x + grid_dim.x * size_t(index.y);
c[offset] = Op()(a[offset], b[0]);
}
template <typename T, typename U, typename Op>
[[kernel]] void binary_vv2(
device const T* a,
device const T* b,
device U* c,
uint2 index [[thread_position_in_grid]],
uint2 grid_dim [[threads_per_grid]]) {
size_t offset = index.x + grid_dim.x * size_t(index.y);
c[offset] = Op()(a[offset], b[offset]);
}
template <typename T, typename U, typename Op>
[[kernel]] void binary_g_nd1(
device const T* a,
device const T* b,
device U* c,
constant const size_t& a_stride,
constant const size_t& b_stride,
uint index [[thread_position_in_grid]]) {
auto a_idx = elem_to_loc_1(index, a_stride);
auto b_idx = elem_to_loc_1(index, b_stride);
c[index] = Op()(a[a_idx], b[b_idx]);
}
template <typename T, typename U, typename Op>
[[kernel]] void binary_g_nd2(
device const T* a,
device const T* b,
device U* c,
constant const size_t a_strides[2],
constant const size_t b_strides[2],
uint2 index [[thread_position_in_grid]],
uint2 grid_dim [[threads_per_grid]]) {
auto a_idx = elem_to_loc_2(index, a_strides);
auto b_idx = elem_to_loc_2(index, b_strides);
size_t out_idx = index.x + size_t(grid_dim.x) * index.y;
c[out_idx] = Op()(a[a_idx], b[b_idx]);
}
template <typename T, typename U, typename Op>
[[kernel]] void binary_g_nd3(
device const T* a,
device const T* b,
device U* c,
constant const size_t a_strides[3],
constant const size_t b_strides[3],
uint3 index [[thread_position_in_grid]],
uint3 grid_dim [[threads_per_grid]]) {
auto a_idx = elem_to_loc_3(index, a_strides);
auto b_idx = elem_to_loc_3(index, b_strides);
size_t out_idx =
index.x + grid_dim.x * (index.y + size_t(grid_dim.y) * index.z);
c[out_idx] = Op()(a[a_idx], b[b_idx]);
}
template <typename T, typename U, typename Op, int N = 1>
[[kernel]] void binary_g(
device const T* a,
device const T* b,
device U* c,
constant const int* shape,
constant const size_t* a_strides,
constant const size_t* b_strides,
constant const int& ndim,
uint3 index [[thread_position_in_grid]],
uint3 grid_dim [[threads_per_grid]]) {
auto idx = elem_to_loc_2_nd(
{N * index.x, index.y, index.z}, shape, a_strides, b_strides, ndim);
auto xshape = shape[ndim - 1];
size_t out_idx =
N * index.x + xshape * (index.y + size_t(grid_dim.y) * index.z);
auto a_xstride = a_strides[ndim - 1];
auto b_xstride = b_strides[ndim - 1];
for (int i = 0; i < N && (int(N * index.x) + i) < xshape; ++i) {
c[out_idx++] = Op()(a[idx.x], b[idx.y]);
idx.x += a_xstride;
idx.y += b_xstride;
}
}