COMPMID-2501: Support multiplier > 1 during QASYMM8 requantization for Quantized LSTM

Change-Id: I7eddbdf77881f313b707b9e59428245f1330a2cf
Signed-off-by: Manuel Bottini <manuel.bottini@arm.com>
Reviewed-on: https://review.mlplatform.org/c/2119
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Pablo Marquez <pablo.tello@arm.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/src/core/utils/quantization/AsymmHelpers.cpp b/src/core/utils/quantization/AsymmHelpers.cpp
index 59052449af..42bd84db47 100644
--- a/src/core/utils/quantization/AsymmHelpers.cpp
+++ b/src/core/utils/quantization/AsymmHelpers.cpp
@@ -34,6 +34,20 @@ namespace quantization
 constexpr int64_t fixed_point_one_Q0 = (1LL << 31);
 constexpr float   epsilon            = 0.00001f;
 
+Status calculate_quantized_multiplier(float multiplier, int *quant_multiplier, int *shift)
+{
+    if(multiplier > 1.f)
+    {
+        Status status = calculate_quantized_multiplier_greater_than_one(multiplier, quant_multiplier, shift);
+        *shift *= -1;
+        return status;
+    }
+    else
+    {
+        return calculate_quantized_multiplier_less_than_one(multiplier, quant_multiplier, shift);
+    }
+}
+
 Status calculate_quantized_multiplier_less_than_one(float multiplier,
                                                     int *quant_multiplier,
                                                     int *right_shift)