commit c4f2743951473f8d97f5a43767fdbb31a4df967c
author Gunes Bayir <gunes.bayir@arm.com> Sun Sep 11 15:59:19 2022 +0100
committer Gunes Bayir <gunes.bayir@arm.com> Fri Sep 16 12:38:59 2022 +0000
tree 26c49b1af8113bb169931f3af5e502904d455a25
parent 0d05b6690fe69c57f63ca43d59b551f074613062

Optimize Quantized/Integer Bilinear Scale for Neon™

This patch introduces several performance optimizations regarding the Bilinear Scale operator with REPLICATE Border mode. Changes apply only to NHWC.

This patch
   - Reduces the memory footprint by disabling precomputation of indices and weights when they're not used
   - Rewrites the kernels for QASYMM8/QASYMM8_SIGNED/U8(Uint8)
   - Adds S8(Int8) Bilinear Scale for Border mode REPLICATE
   - Removes Bilinear Scale SVE kernels for Quantized and Integer types and adjust the heuristics to choose the Neon™ implementation
   - Adds new test cases where the input and output of the Bilinear Scale operator have different quantization scale and offset

Resolves: COMPMID-5453, COMPMID-5454

Change-Id: I3d251e76e0c6978fd5a0a1795ec62ab536bec93c
Signed-off-by: Gunes Bayir <gunes.bayir@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/8250
Reviewed-by: SiCong Li <sicong.li@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Benchmark: Arm Jenkins <bsgcomp@arm.com>

src/cpu/kernels/CpuScaleKernel.h

diff --git a/src/cpu/kernels/CpuScaleKernel.h b/src/cpu/kernels/CpuScaleKernel.h
index 416e115..8102142 100644
--- a/src/cpu/kernels/CpuScaleKernel.h
+++ b/src/cpu/kernels/CpuScaleKernel.h
@@ -50,8 +50,9 @@
      *
      * @note dx, dy and offsets have the same dimensions (width and height) of the output tensor
      * @note Using @p policy Area only supports data layout NCHW and input data type U8.
+     * @note Using S8 data type only supports NHWC, @p border_mode Replicate, and @p policy Bilinear
      *
-     * @param[in]  src     Source tensor info. Data types supported: QASYMM8/QASYMM8_SIGNED/U8/S16/F16/F32.
+     * @param[in]  src     Source tensor info. Data types supported: QASYMM8/QASYMM8_SIGNED/U8/S8/S16/F16/F32.
      * @param[in]  dx      Distance x tensor info. Pixel's distance between the X real coordinate and the smallest X following integer. Data type supported: F32
      * @param[in]  dy      Distance y tensor info. Pixel's distance between the Y real coordinate and the smallest Y following integer. Data type supported: F32
      * @param[in]  offsets Offset tensor info. Offset to access the pixel with NEAREST interpolation or the top-left pixel with BILINEAR interpolation in the input tensor. Data type supported: S32.