commit a62129a02397ba87171ebf4477795f628dcec0f6
author Viet-Hoa Do <viet-hoa.do@arm.com> Wed Apr 26 15:38:45 2023 +0100
committer Viet-Hoa Do <viet-hoa.do@arm.com> Tue May 02 08:57:02 2023 +0000
tree 91e53cc8982d9f16e66db53f81830fb05da83596
parent f0ff76dbfc9137d0dfc5e99666e24c7a2ca8b072

Fix fully connected and matmul mismatches

* There is an issue with quantized fully connected and matmul
  when the lower bound of bounded ReLU is negative.
* Use int32_t for the calculation of min/max quantized value
  rather than PixelValue to avoid this issue.

Partially resolves: COMPMID-5996
Signed-off-by: Viet-Hoa Do <viet-hoa.do@arm.com>
Change-Id: I7b22e9d56a2441fc6a4c5c4e627f57d6e00d6ff1
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/9502
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Jakub Sujak <jakub.sujak@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Benchmark: Arm Jenkins <bsgcomp@arm.com>

src/cpu/operators/CpuMatMul.cpp

diff --git a/src/cpu/operators/CpuMatMul.cpp b/src/cpu/operators/CpuMatMul.cpp
index 369466b..46858f4 100644
--- a/src/cpu/operators/CpuMatMul.cpp
+++ b/src/cpu/operators/CpuMatMul.cpp
@@ -34,6 +34,7 @@
 #include "src/core/CPP/Validate.h"
 #include "src/core/helpers/AutoConfiguration.h"
 #include "src/core/helpers/MemoryHelpers.h"
+#include "src/core/utils/quantization/AsymmHelpers.h"
 #include "src/cpu/utils/CpuAuxTensorHandler.h"
 
 using namespace arm_compute::experimental;
@@ -60,16 +61,16 @@
 
     ARM_COMPUTE_RETURN_ON_ERROR(quantization::calculate_quantized_multiplier(multiplier, &output_multiplier, &output_shift));
 
-    PixelValue type_min{};
-    PixelValue type_max{};
+    int32_t type_min = 0;
+    int32_t type_max = 0;
     std::tie(type_min, type_max) = quantization::get_quantized_asymmetric_output_min_max(oq_info, act, data_type);
 
     gemmlowp_output_stage_info.gemmlowp_multiplier = output_multiplier;
     gemmlowp_output_stage_info.gemmlowp_shift      = output_shift;
     gemmlowp_output_stage_info.gemmlowp_offset     = oq_unif.offset;
     gemmlowp_output_stage_info.type                = GEMMLowpOutputStageType::QUANTIZE_DOWN_FIXEDPOINT;
-    gemmlowp_output_stage_info.gemmlowp_min_bound  = type_min.get<int32_t>();
-    gemmlowp_output_stage_info.gemmlowp_max_bound  = type_max.get<int32_t>();
+    gemmlowp_output_stage_info.gemmlowp_min_bound  = type_min;
+    gemmlowp_output_stage_info.gemmlowp_max_bound  = type_max;
 
     return Status{};
 }