COMPMID-1507 Add support for QASYMM8 in CLScaleKernel

Change-Id: I4a32e47e6d9152633668cf0e14db88fc8c26f7ea
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/148167
Tested-by: bsgcomp <bsgcomp@arm.com>
Reviewed-by: Michele DiGiorgio <michele.digiorgio@arm.com>

1 files changed, 169 insertions, 0 deletions

diff --git a/src/core/CL/cl_kernels/scale_quantized.cl b/src/core/CL/cl_kernels/scale_quantized.cl
new file mode 100644
index 0000000000..3211e7efa1
--- /dev/null
+++ b/src/core/CL/cl_kernels/scale_quantized.cl
@@ -0,0 +1,169 @@
+/*
+ * Copyright (c) 2018 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_asymm.h"
+#include "warp_helpers_quantized.h"
+
+/** Transforms four 2D coordinates. This is used to map the output coordinates to the input coordinates.
+ *
+ * @param[in] coord 2D coordinates to transform.
+ * @param[in] scale input/output scale ratio
+ *
+ * @return a float8 containing 4 2D transformed values in the input image.
+ */
+inline const float8 transform_bilinear_quantized(const float2 coord, const float2 scale)
+{
+    const float4 in_x_coords = (float4)(coord.s0, 1 + coord.s0, 2 + coord.s0, 3 + coord.s0);
+#ifdef SAMPLING_POLICY_TOP_LEFT
+    const float4 new_x = in_x_coords * (float4)(scale.s0);
+    const float4 new_y = (float4)(coord.s1 * scale.s1);
+    return (float8)(new_x.s0, new_y.s0, new_x.s1, new_y.s1, new_x.s2, new_y.s2, new_x.s3, new_y.s3);
+#elif SAMPLING_POLICY_CENTER
+    const float4 new_x = (in_x_coords + ((float4)(0.5f))) * (float4)(scale.s0) - (float4)(0.5f);
+    const float4 new_y = (float4)((coord.s1 + 0.5f) * scale.s1 - 0.5f);
+    return (float8)(new_x.s0, new_y.s0, new_x.s1, new_y.s1, new_x.s2, new_y.s2, new_x.s3, new_y.s3);
+#else /* SAMPLING_POLICY */
+#error("Unsupported sampling policy");
+#endif /* SAMPLING_POLICY */
+}
+
+/** Performs an affine transformation on an image interpolating with the BILINEAR method.
+ *
+ * @note Sampling policy to used is passed as -DSAMPLING_POLICY_(TYPE) e.g. -DSAMPLING_POLICY_TOP_LEFT
+ * @note Scale value for QASYMM8 data type to used is passed as -DSCALE=<VALUE> e.g. -DSCALE=0.5
+ * @note Offset value for QASYMM8 data type to used is passed as -DOFFSET=<VALUE> e.g. -DOFFSET=1
+ *
+ * @param[in]  in_ptr                            Pointer to the source image. Supported data types: QASYMM8.
+ * @param[in]  in_stride_x                       Stride of the source image in X dimension (in bytes)
+ * @param[in]  in_step_x                         src_stride_x * number of elements along X processed per workitem(in bytes)
+ * @param[in]  in_stride_y                       Stride of the source image in Y dimension (in bytes)
+ * @param[in]  in_step_y                         src_stride_y * number of elements along Y processed per workitem(in bytes)
+ * @param[in]  in_offset_first_element_in_bytes  The offset of the first element in the source image
+ * @param[out] out_ptr                           Pointer to the destination image. Supported data types: U8, S16. (Must be the same as the input)
+ * @param[in]  out_stride_x                      Stride of the destination image in X dimension (in bytes)
+ * @param[in]  out_step_x                        dst_stride_x * number of elements along X processed per workitem(in bytes)
+ * @param[in]  out_stride_y                      Stride of the destination image in Y dimension (in bytes)
+ * @param[in]  out_step_y                        dst_stride_y * number of elements along Y processed per workitem(in bytes)
+ * @param[in]  out_offset_first_element_in_bytes The offset of the first element in the destination image
+ * @param[in]  input_width                       Input image width
+ * @param[in]  input_height                      Input image height
+ * @param[in]  scale_x                           The scale factor along x dimension
+ * @param[in]  scale_y                           The scale factor along y dimension
+ */
+__kernel void scale_bilinear_quantized_nchw(
+    IMAGE_DECLARATION(in),
+    IMAGE_DECLARATION(out),
+    const float input_width,
+    const float input_height,
+    const float scale_x,
+    const float scale_y)
+{
+    Image        in  = CONVERT_TO_IMAGE_STRUCT_NO_STEP(in);
+    Image        out = CONVERT_TO_IMAGE_STRUCT(out);
+    const float2 r   = (float2)(scale_x, scale_y);
+    const float8 tc  = transform_bilinear_quantized(get_current_coords_quantized(), r);
+    vstore4(bilinear_interpolate_with_border_quantized(&in, tc, input_width, input_height, BORDER_SIZE, SCALE, OFFSET), 0, (__global DATA_TYPE *)out.ptr);
+}
+
+/** Performs scale on an image interpolating with the BILINEAR method. (NHWC)
+ *
+ * @note Sampling policy to be used is passed as -DSAMPLING_POLICY_(TYPE) e.g. -DSAMPLING_POLICY_TOP_LEFT
+ * @note Scale value for QASYMM8 data type to used is passed as -DSCALE=<VALUE> e.g. -DSCALE=0.5
+ * @note Offset value for QASYMM8 data type to used is passed as -DOFFSET=<VALUE> e.g. -DOFFSET=1
+ * @note If border mode replicate is used, is should be passed as -DBORDER_MODE_REPLICATE
+ *
+ * @param[in]  in_ptr                            Pointer to the source image. Supported data types: QASYMM8.
+ * @param[in]  in_stride_x                       Stride of the source image in X dimension (in bytes)
+ * @param[in]  in_step_x                         src_stride_x * number of elements along X processed per workitem(in bytes)
+ * @param[in]  in_stride_y                       Stride of the source image in Y dimension (in bytes)
+ * @param[in]  in_step_y                         src_stride_y * number of elements along Y processed per workitem(in bytes)
+ * @param[in]  in_stride_z                       Stride of the source image in Z dimension (in bytes)
+ * @param[in]  in_step_z                         src_stride_z * number of elements along Z processed per workitem(in bytes)
+ * @param[in]  in_offset_first_element_in_bytes  The offset of the first element in the source image
+ * @param[out] out_ptr                           Pointer to the destination image. Supported data types: same as @p in_ptr
+ * @param[in]  out_stride_x                      Stride of the destination image in X dimension (in bytes)
+ * @param[in]  out_step_x                        dst_stride_x * number of elements along X processed per workitem(in bytes)
+ * @param[in]  out_stride_y                      Stride of the destination image in Y dimension (in bytes)
+ * @param[in]  out_step_y                        dst_stride_y * number of elements along Y processed per workitem(in bytes)
+ * @param[in]  out_stride_z                      Stride of the destination image in Z dimension (in bytes)
+ * @param[in]  out_step_z                        dst_stride_y * number of elements along Z processed per workitem(in bytes)
+ * @param[in]  out_offset_first_element_in_bytes The offset of the first element in the destination image
+ * @param[in]  input_width                       Input image width
+ * @param[in]  input_height                      Input image height
+ * @param[in]  scale_x                           The scale factor along x dimension
+ * @param[in]  scale_y                           The scale factor along y dimension
+ */
+__kernel void scale_bilinear_quantized_nhwc(
+    TENSOR3D_DECLARATION(in),
+    TENSOR3D_DECLARATION(out),
+    const float input_width,
+    const float input_height,
+    const float scale_x,
+    const float scale_y)
+{
+    Tensor3D in  = CONVERT_TO_TENSOR3D_STRUCT_NO_STEP(in);
+    Tensor3D out = CONVERT_TO_TENSOR3D_STRUCT(out);
+
+#ifdef SAMPLING_POLICY_TOP_LEFT
+    const float new_x = get_global_id(1) * scale_x;
+    const float new_y = get_global_id(2) * scale_y;
+#elif SAMPLING_POLICY_CENTER
+    const float new_x = (get_global_id(1) + 0.5f) * scale_x - 0.5f;
+    const float new_y = (get_global_id(2) + 0.5f) * scale_y - 0.5f;
+#else /* SAMPLING_POLICY */
+#error("Unsupported sampling policy");
+#endif /* SAMPLING_POLICY */
+
+    const float new_xf      = floor(new_x);
+    const float new_yf      = floor(new_y);
+    float       clamped_x   = clamp(new_xf, 0.0f, input_width - 1);
+    float       clamped_x1  = clamp(new_xf + 1, 0.0f, input_width - 1);
+    float       clamped_x_  = clamped_x;
+    float       clamped_x1_ = clamped_x1;
+    const float clamped_y   = clamp(new_yf, 0.0f, input_height - 1);
+    const float clamped_y1  = clamp(new_yf + 1, 0.0f, input_height - 1);
+
+#ifndef BORDER_MODE_REPLICATE
+    clamped_x1  = select(clamped_x1, 0.0f - BORDER_SIZE, new_yf + 1 < 0.f || new_yf + 1 > input_height - 1 || new_xf + 1 < 0.f || new_xf + 1 > input_width - 1);
+    clamped_x_  = select(clamped_x_, 0.0f - BORDER_SIZE, new_yf + 1 > input_height - 1 || new_xf < 0.f || new_xf > input_width - 1);
+    clamped_x   = select(clamped_x, 0.0f - BORDER_SIZE, new_yf < 0.f || new_yf > input_height - 1 || new_xf < 0.f || new_xf > input_width - 1);
+    clamped_x1_ = select(clamped_x1_, 0.0f - BORDER_SIZE, new_xf + 1 < 0.f || new_xf + 1 > input_width - 1 || new_yf < 0.f || new_yf > input_height - 1);
+#endif /* BORDER_MODE_REPLICATE */
+
+    int4 ins = (int4)(*((__global DATA_TYPE *)tensor3D_offset(&in, get_global_id(0), convert_int(clamped_x), convert_int(clamped_y))),
+                      *((__global DATA_TYPE *)tensor3D_offset(&in, get_global_id(0), convert_int(clamped_x1_), convert_int(clamped_y))),
+                      *((__global DATA_TYPE *)tensor3D_offset(&in, get_global_id(0), convert_int(clamped_x_), convert_int(clamped_y1))),
+                      *((__global DATA_TYPE *)tensor3D_offset(&in, get_global_id(0), convert_int(clamped_x1), convert_int(clamped_y1))));
+
+    const float  a      = new_x - new_xf;
+    const float  b      = 1.f - a;
+    const float  a1     = new_y - new_yf;
+    const float  b1     = 1.f - a1;
+    const float4 insf32 = convert_float4(ins - (int4)OFFSET) * (float4)SCALE;
+
+    const float fr = ((insf32.s0 * b * b1) + (insf32.s1 * a * b1) + (insf32.s2 * b * a1) + (insf32.s3 * a * a1));
+
+    uchar res = convert_uchar_sat(convert_int_sat_rtp(fr / SCALE) + OFFSET);
+
+    *((__global DATA_TYPE *)out.ptr) = res;
+}