diff options
Diffstat (limited to 'src/core/CL/cl_kernels/winograd.cl')
| -rw-r--r-- | src/core/CL/cl_kernels/winograd.cl | 97 |
1 files changed, 96 insertions, 1 deletions
diff --git a/src/core/CL/cl_kernels/winograd.cl b/src/core/CL/cl_kernels/winograd.cl index fa06601c50..238e21a18a 100644 --- a/src/core/CL/cl_kernels/winograd.cl +++ b/src/core/CL/cl_kernels/winograd.cl @@ -205,4 +205,99 @@ __kernel void winograd_input_transform_2x2_3x3_stepz2_nchw( vstore2(out32, 0, (__global float *)(dst_addr + 14 * dst_stride_z)); vstore2(out33, 0, (__global float *)(dst_addr + 15 * dst_stride_z)); } -#endif //defined(NUM_TILES_X)
\ No newline at end of file +#endif //defined(NUM_TILES_X) + +#if defined(NUM_CHANNELS) + +/** This OpenCL kernel performs Winograd filter transform 3x3 when the data format is NCHW and the output tile is 2x2 + * + * @note The number of channels must be passed at compile time using -DNUM_CHANNELS: e.g. -DNUM_CHANNELS=64 + * + * @param[in] src_ptr Pointer to the source tensor. Supported data types: F32 + * @param[in] src_stride_x Stride of the source tensor in X dimension (in bytes) + * @param[in] src_step_x src_stride_x * number of elements along X processed per workitem(in bytes) + * @param[in] src_stride_y Stride of the source tensor in Y dimension (in bytes) + * @param[in] src_step_y src_stride_y * number of elements along Y processed per workitem(in bytes) + * @param[in] src_stride_z Stride of the source tensor in Z dimension (in bytes) + * @param[in] src_step_z src_stride_z * number of elements along Z processed per workitem(in bytes) + * @param[in] src_stride_w Stride of the source tensor in W dimension (in bytes) + * @param[in] src_step_w src_stride_w * number of elements along W processed per workitem(in bytes) + * @param[in] src_offset_first_element_in_bytes The offset of the first element in the source tensor + * @param[out] dst_ptr Pointer to the destination tensor. Supported data types: same as @p src_ptr + * @param[in] dst_stride_x Stride of the destination tensor in X dimension (in bytes) + * @param[in] dst_step_x dst_stride_x * number of elements along X processed per workitem(in bytes) + * @param[in] dst_stride_y Stride of the destination tensor in Y dimension (in bytes) + * @param[in] dst_step_y dst_stride_y * number of elements along Y processed per workitem(in bytes) + * @param[in] src_stride_z Stride of the source tensor in Z dimension (in bytes) + * @param[in] src_step_z src_stride_z * number of elements along Z processed per workitem(in bytes) + * @param[in] dst_offset_first_element_in_bytes The offset of the first element in the destination tensor + */ +__kernel void winograd_filter_transform_2x2_3x3_nchw( + TENSOR4D_DECLARATION(src), + TENSOR3D_DECLARATION(dst)) +{ + Tensor4D src = CONVERT_TO_TENSOR4D_STRUCT(src, NUM_CHANNELS); + + const __global uchar *src_addr = tensor4D_offset(&src, 0, 0, 0, 0); + + // Load the values from the input tensor + float3 w0 = vload3(0, (__global float *)(src_addr + 0 * src_stride_y)); + float3 w1 = vload3(0, (__global float *)(src_addr + 1 * src_stride_y)); + float3 w2 = vload3(0, (__global float *)(src_addr + 2 * src_stride_y)); + + // Transform the 3x3 tile in a 4x4 tile + float4 out0 = 0.0f; + float4 out1 = 0.0f; + float4 out2 = 0.0f; + float4 out3 = 0.0f; + + // Row 0 + out0.s0 = (w0.s0); + out0.s1 = (w0.s0 + w0.s1 + w0.s2) * 0.5f; + out0.s2 = (w0.s0 + w0.s2 - w0.s1) * 0.5f; + out0.s3 = (w0.s2); + + // Row 1 + out1.s0 = (w0.s0 + w1.s0 + w2.s0) * 0.5f; + out1.s1 = (w0.s0 + w1.s0 + w2.s0 + w0.s1 + w1.s1 + w2.s1 + w0.s2 + w1.s2 + w2.s2) * 0.25f; + out1.s2 = (w0.s0 + w1.s0 + w2.s0 + w0.s2 + w1.s2 + w2.s2 - w0.s1 - w1.s1 - w2.s1) * 0.25f; + out1.s3 = (w0.s2 + w1.s2 + w2.s2) * 0.5f; + + // Row 2 + out2.s0 = (w0.s0 + w2.s0 - w1.s0) * 0.5f; + out2.s1 = (w0.s0 + w2.s0 + w0.s1 + w2.s1 + w0.s2 + w2.s2 - w1.s0 - w1.s1 - w1.s2) * 0.25f; + out2.s2 = (w0.s0 + w2.s0 + w1.s1 + w0.s2 + w2.s2 - w1.s0 - w0.s1 - w2.s1 - w1.s2) * 0.25f; + out2.s3 = (w0.s2 + w2.s2 - w1.s2) * 0.5f; + + // Row 3 + out3.s0 = (w2.s0); + out3.s1 = (w2.s0 + w2.s1 + w2.s2) * 0.5f; + out3.s2 = (w2.s0 + w2.s2 - w2.s1) * 0.5f; + out3.s3 = (w2.s2); + + int z = get_global_id(2); + int x0 = z / NUM_CHANNELS; // idx filter + int y0 = z % NUM_CHANNELS; // idx channel + + // Get output address + __global uchar *dst_addr = dst_ptr + dst_offset_first_element_in_bytes + x0 * dst_stride_x + y0 * dst_stride_y; + + // Store the 16 values across the 16 channels + *(__global float *)(dst_addr + 0 * dst_stride_z) = out0.s0; + *(__global float *)(dst_addr + 1 * dst_stride_z) = out0.s1; + *(__global float *)(dst_addr + 2 * dst_stride_z) = out0.s2; + *(__global float *)(dst_addr + 3 * dst_stride_z) = out0.s3; + *(__global float *)(dst_addr + 4 * dst_stride_z) = out1.s0; + *(__global float *)(dst_addr + 5 * dst_stride_z) = out1.s1; + *(__global float *)(dst_addr + 6 * dst_stride_z) = out1.s2; + *(__global float *)(dst_addr + 7 * dst_stride_z) = out1.s3; + *(__global float *)(dst_addr + 8 * dst_stride_z) = out2.s0; + *(__global float *)(dst_addr + 9 * dst_stride_z) = out2.s1; + *(__global float *)(dst_addr + 10 * dst_stride_z) = out2.s2; + *(__global float *)(dst_addr + 11 * dst_stride_z) = out2.s3; + *(__global float *)(dst_addr + 12 * dst_stride_z) = out3.s0; + *(__global float *)(dst_addr + 13 * dst_stride_z) = out3.s1; + *(__global float *)(dst_addr + 14 * dst_stride_z) = out3.s2; + *(__global float *)(dst_addr + 15 * dst_stride_z) = out3.s3; +} +#endif // defined(NUM_CHANNELS) |