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optimized cv::transpose inplace

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This commit is contained in:
Ilya Lavrenov 2014-06-27 14:03:05 +04:00
parent 9c8b9fc733
commit 54e4ef657c
2 changed files with 25 additions and 11 deletions
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16
modules/core/src/matrix.cpp
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@ -2973,8 +2973,10 @@ static inline int divUp(int a, int b)
static bool ocl_transpose( InputArray _src, OutputArray _dst )
{
const ocl::Device & dev = ocl::Device::getDefault();
const int TILE_DIM = 32, BLOCK_ROWS = 8;
int type = _src.type(), cn = CV_MAT_CN(type), depth = CV_MAT_DEPTH(type);
int type = _src.type(), cn = CV_MAT_CN(type), depth = CV_MAT_DEPTH(type),
rowsPerWI = dev.isIntel() ? 4 : 1;
UMat src = _src.getUMat();
_dst.create(src.cols, src.rows, type);
@ -2990,9 +2992,9 @@ static bool ocl_transpose( InputArray _src, OutputArray _dst )
}
ocl::Kernel k(kernelName.c_str(), ocl::core::transpose_oclsrc,
format("-D T=%s -D T1=%s -D cn=%d -D TILE_DIM=%d -D BLOCK_ROWS=%d",
format("-D T=%s -D T1=%s -D cn=%d -D TILE_DIM=%d -D BLOCK_ROWS=%d -D rowsPerWI=%d",
ocl::memopTypeToStr(type), ocl::memopTypeToStr(depth),
cn, TILE_DIM, BLOCK_ROWS));
cn, TILE_DIM, BLOCK_ROWS, rowsPerWI));
if (k.empty())
return false;
@ -3003,7 +3005,13 @@ static bool ocl_transpose( InputArray _src, OutputArray _dst )
ocl::KernelArg::WriteOnlyNoSize(dst));
size_t localsize[2] = { TILE_DIM, BLOCK_ROWS };
size_t globalsize[2] = { src.cols, inplace ? src.rows : divUp(src.rows, TILE_DIM) * BLOCK_ROWS };
size_t globalsize[2] = { src.cols, inplace ? (src.rows + rowsPerWI - 1) / rowsPerWI : (divUp(src.rows, TILE_DIM) * BLOCK_ROWS) };
if (inplace && dev.isIntel())
{
localsize[0] = 16;
localsize[1] = dev.maxWorkGroupSize() / localsize[0];
}
return k.run(2, globalsize, localsize, false);
}

20
modules/core/src/opencl/transpose.cl
View File

@ -117,18 +117,24 @@ __kernel void transpose(__global const uchar * srcptr, int src_step, int src_off
__kernel void transpose_inplace(__global uchar * srcptr, int src_step, int src_offset, int src_rows)
{
int x = get_global_id(0);
int y = get_global_id(1);
int y = get_global_id(1) * rowsPerWI;
if (y < src_rows && x < y)
if (x < y + rowsPerWI)
{
int src_index = mad24(y, src_step, mad24(x, TSIZE, src_offset));
int dst_index = mad24(x, src_step, mad24(y, TSIZE, src_offset));
T tmp;
__global const uchar * src = srcptr + src_index;
__global uchar * dst = srcptr + dst_index;
#pragma unroll
for (int i = 0; i < rowsPerWI; ++i, ++y, src_index += src_step, dst_index += TSIZE)
if (y < src_rows && x < y)
{
__global uchar * src = srcptr + src_index;
__global uchar * dst = srcptr + dst_index;
T tmp = loadpix(dst);
storepix(loadpix(src), dst);
storepix(tmp, src);
tmp = loadpix(dst);
storepix(loadpix(src), dst);
storepix(tmp, src);
}
}
}