COMPMID-1959: Implements 2D FFT on OpenCL
Change-Id: I73cf3984a5463acc854c8a59dc2bd9a5234cd99c
Signed-off-by: Georgios Pinitas <georgios.pinitas@arm.com>
Reviewed-on: https://review.mlplatform.org/c/936
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Gian Marco Iodice <gianmarco.iodice@arm.com>
diff --git a/src/core/CL/cl_kernels/fft_scale.cl b/src/core/CL/cl_kernels/fft_scale.cl
new file mode 100644
index 0000000..bf78a26
--- /dev/null
+++ b/src/core/CL/cl_kernels/fft_scale.cl
@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 2019 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include "helpers.h"
+
+/** Computes the fft scale stage
+ *
+ * @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_offset_first_element_in_bytes The offset of the first element in the source tensor
+ * @param[out] dst_ptr (Optional) Pointer to the destination tensor. Supported data types: same as @p src_ptr
+ * @param[in] dst_stride_x (Optional) Stride of the destination tensor in X dimension (in bytes)
+ * @param[in] dst_step_x (Optional) dst_stride_x * number of elements along X processed per workitem(in bytes)
+ * @param[in] dst_stride_y (Optional) Stride of the destination tensor in Y dimension (in bytes)
+ * @param[in] dst_step_y (Optional) dst_stride_y * number of elements along Y processed per workitem(in bytes)
+ * @param[in] dst_stride_z (Optional) Stride of the source tensor in Z dimension (in bytes)
+ * @param[in] dst_step_z (Optional) dst_stride_z * number of elements along Z processed per workitem(in bytes)
+ * @param[in] dst_offset_first_element_in_bytes (Optional) The offset of the first element in the destination tensor
+ * @param[in] scale Scale to apply to the complex value
+ */
+__kernel void fft_scale_conj(
+ TENSOR3D_DECLARATION(src)
+#ifndef IN_PLACE
+ ,
+ TENSOR3D_DECLARATION(dst)
+#endif /* not IN_PLACE */
+ ,
+ float scale)
+{
+ // Get tensor pointers
+ Tensor3D src = CONVERT_TO_TENSOR3D_STRUCT(src);
+#if defined(IN_PLACE)
+ Tensor3D dst = src;
+#else /* IN_PLACE */
+ Tensor3D dst = CONVERT_TO_TENSOR3D_STRUCT(dst);
+#endif /* IN_PLACE */
+
+ // Store result
+#if VEC_SIZE == 1
+ *((__global float *)dst.ptr) = (*(__global float *)src.ptr) / scale;
+#elif VEC_SIZE == 2
+ // Load data
+ float2 data = vload2(0, (__global float *)src.ptr);
+ data /= scale;
+#if defined(CONJ)
+ vstore2((float2)(data.s0, -data.s1), 0, (__global float *)dst.ptr);
+#else // defined(CONJ)
+ vstore2(data, 0, (__global float *)dst.ptr);
+#endif // defined(CONJ)
+#else // VEC_SIZE == 1
+#error "vec_size of 1 and 2 are supported"
+#endif // VEC_SIZE == 1
+}
\ No newline at end of file