mirror of https://github.com/alibaba/MNN.git
48 lines
1.4 KiB
Metal
48 lines
1.4 KiB
Metal
|
//
|
||
|
|
// MetalTranspose.metal
|
||
|
|
// MNN
|
||
|
|
//
|
||
|
|
// Created by MNN on 2018/11/23.
|
||
|
|
// Copyright © 2018, Alibaba Group Holding Limited
|
||
|
|
//
|
||
|
|
|
||
|
|
#include <metal_stdlib>
|
||
|
|
#include "MetalDefine.metal"
|
||
|
|
|
||
|
|
using namespace metal;
|
||
|
|
|
||
|
|
kernel void transpose_prepare(const device int *_dims [[buffer(0)]],
|
||
|
|
const device int *perm [[buffer(1)]],
|
||
|
|
device int *perm_strides [[buffer(2)]],
|
||
|
|
uint gid [[thread_position_in_grid]]) {
|
||
|
|
int ndims = _dims[0];
|
||
|
|
if ((int)gid >= ndims) return;
|
||
|
|
|
||
|
|
auto dims = _dims + 1;
|
||
|
|
int index = perm[int(gid)];
|
||
|
|
int stride = 1;
|
||
|
|
while (index < ndims - 1) {
|
||
|
|
stride *= dims[index + 1];
|
||
|
|
index++;
|
||
|
|
}
|
||
|
|
perm_strides[int(gid)] = stride;
|
||
|
|
}
|
||
|
|
|
||
|
|
kernel void transpose(const device ftype *in [[buffer(0)]],
|
||
|
|
const device int *perm_strides [[buffer(1)]],
|
||
|
|
device ftype *out [[buffer(2)]],
|
||
|
|
const device int *_out_strides [[buffer(3)]],
|
||
|
|
uint gid [[thread_position_in_grid]]) {
|
||
|
|
int n_out = _out_strides[0];
|
||
|
|
auto out_strides = _out_strides + 1;
|
||
|
|
|
||
|
|
int off = gid;
|
||
|
|
auto off_in = in;
|
||
|
|
for (int i = 0; i < n_out; i++) {
|
||
|
|
auto dim_index = off / out_strides[i];
|
||
|
|
off = off % out_strides[i];
|
||
|
|
off_in += dim_index * perm_strides[i];
|
||
|
|
}
|
||
|
|
out[int(gid)] = *off_in;
|
||
|
|
}
|