COMPMID-448: Implement CL Quantization/Dequantization Layer.
Change-Id: Id002e23a2ac48af3d245416dc6411d9a04a1e513
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/81827
Reviewed-by: Gian Marco Iodice <gianmarco.iodice@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
diff --git a/src/core/CL/cl_kernels/minmax_layer.cl b/src/core/CL/cl_kernels/minmax_layer.cl
new file mode 100644
index 0000000..1e543b4
--- /dev/null
+++ b/src/core/CL/cl_kernels/minmax_layer.cl
@@ -0,0 +1,101 @@
+/*
+ * Copyright (c) 2017 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"
+
+#if defined(WIDTH) && defined(HEIGHT) && defined(DEPTH)
+/** This function identifies the min and maximum value of an input 3D tensor.
+ *
+ * @note The width, height and depth of the input tensor must be provided at compile time using -DWIDTH, -DHEIGHT and -DDEPTH (e.g. -DWIDTH=320, -DHEIGHT=240, -DDEPTH=3)
+ *
+ * @param[in] src_ptr Pointer to the source tensor. Supported data types: F32
+ * @param[in] src_stride_x Stride of the source image 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 image 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 image 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 image
+ * @param[in] dst_ptr Pointer to the min/max vector. Minimum value in position 0, maximum value in position 1. Supported data types: F32.
+ * @param[in] dst_stride_x Stride of the min/max vector 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_offset_first_element_in_bytes The offset of the first element in the min/max vector
+ */
+__kernel void minmax_layer(
+ TENSOR3D_DECLARATION(src),
+ VECTOR_DECLARATION(dst))
+{
+ Tensor3D src = CONVERT_TO_TENSOR3D_STRUCT(src);
+ Vector dst = CONVERT_TO_VECTOR_STRUCT(dst);
+
+ float4 min_value = (float4)FLT_MAX;
+ float4 max_value = (float4) - FLT_MAX;
+ float2 min_max_value = (float2)(FLT_MAX, -FLT_MAX);
+
+ for(int z = 0; z < DEPTH; ++z)
+ {
+ for(int y = 0; y < HEIGHT; ++y)
+ {
+ int x = 0;
+ __global float *src_addr = (__global float *)(src.ptr + y * src_stride_y + z * src_stride_z);
+
+ for(; x <= (int)(WIDTH - 8); x += 8)
+ {
+ float8 value = *(src_addr + x);
+
+ min_value = select(value.s0123, min_value, min_value < value.s0123);
+ min_value = select(value.s4567, min_value, min_value < value.s4567);
+
+ max_value = select(value.s0123, max_value, max_value > value.s0123);
+ max_value = select(value.s4567, max_value, max_value > value.s4567);
+ }
+
+ for(; x < WIDTH; ++x)
+ {
+ float value = *(src_addr + x);
+
+ min_max_value.s0 = min(min_max_value.s0, value);
+ min_max_value.s1 = max(min_max_value.s1, value);
+ }
+ }
+ }
+
+ // Perform min/max reduction
+ min_value.s01 = min(min_value.s01, min_value.s23);
+ min_value.s0 = min(min_value.s0, min_value.s1);
+ max_value.s01 = max(max_value.s01, max_value.s23);
+ max_value.s0 = max(max_value.s0, max_value.s1);
+
+ min_max_value.s0 = min(min_max_value.s0, min_value.s0);
+ min_max_value.s1 = max(min_max_value.s1, max_value.s0);
+
+ if(min_max_value.s0 == min_max_value.s1)
+ {
+ min_max_value.s0 = 0.0f;
+ min_max_value.s1 = 1.0f;
+ }
+
+ // Store min and max
+ vstore2(min_max_value, 0, (__global float *)dst.ptr);
+}
+#endif // defined(WIDTH) && defined(HEIGHT) && defined(DEPTH)
\ No newline at end of file