From 9f0693b41a33d4d17ef016d8a5490cc65a8cfb8a Mon Sep 17 00:00:00 2001
From: Aron Virginas-Tar <Aron.Virginas-Tar@arm.com>
Date: Wed, 6 Nov 2019 14:32:30 +0000
Subject: IVGCVSW-3841 Add support for per-axis quantization

Signed-off-by: Aron Virginas-Tar <Aron.Virginas-Tar@arm.com>
Change-Id: Ife7fa63b8839465e8f9f8626f34ca8c0f4d12788
---
 Utils.cpp | 28 ++++++++++++++++++++++++----
 1 file changed, 24 insertions(+), 4 deletions(-)

(limited to 'Utils.cpp')

diff --git a/Utils.cpp b/Utils.cpp
index 43b65ee3..246d6415 100644
--- a/Utils.cpp
+++ b/Utils.cpp
@@ -52,6 +52,9 @@ void SwizzleAndroidNn4dTensorToArmNn(const armnn::TensorInfo& tensor, const void
     case armnn::DataType::QuantisedAsymm8:
         SwizzleAndroidNn4dTensorToArmNn<uint8_t>(tensor.GetShape(), input, output, mappings);
         break;
+    case armnn::DataType::QuantizedSymm8PerAxis:
+        SwizzleAndroidNn4dTensorToArmNn<int8_t>(tensor.GetShape(), input, output, mappings);
+        break;
     default:
         ALOGW("Unknown armnn::DataType for swizzling");
         assert(0);
@@ -109,8 +112,9 @@ armnn::TensorInfo GetTensorInfoForOperand(const V1_0::Operand& operand)
 
 armnn::TensorInfo GetTensorInfoForOperand(const V1_2::Operand& operand)
 {
-    armnn::DataType type;
+    using namespace armnn;
 
+    DataType type;
     switch (operand.type)
     {
         case V1_2::OperandType::TENSOR_FLOAT32:
@@ -119,6 +123,9 @@ armnn::TensorInfo GetTensorInfoForOperand(const V1_2::Operand& operand)
         case V1_2::OperandType::TENSOR_FLOAT16:
             type = armnn::DataType::Float16;
             break;
+        case V1_2::OperandType::TENSOR_QUANT8_SYMM_PER_CHANNEL:
+            type = armnn::DataType::QuantizedSymm8PerAxis;
+            break;
         case V1_2::OperandType::TENSOR_QUANT8_ASYMM:
             type = armnn::DataType::QuantisedAsymm8;
             break;
@@ -132,10 +139,23 @@ armnn::TensorInfo GetTensorInfoForOperand(const V1_2::Operand& operand)
             throw UnsupportedOperand<V1_2::OperandType>(operand.type);
     }
 
-    armnn::TensorInfo ret(operand.dimensions.size(), operand.dimensions.data(), type);
+    TensorInfo ret(operand.dimensions.size(), operand.dimensions.data(), type);
+    if (type == DataType::QuantizedSymm8PerAxis)
+    {
+        // ExtraParams is expected to be of type channelQuant
+        BOOST_ASSERT(operand.extraParams.getDiscriminator() ==
+                     V1_2::Operand::ExtraParams::hidl_discriminator::channelQuant);
 
-    ret.SetQuantizationScale(operand.scale);
-    ret.SetQuantizationOffset(operand.zeroPoint);
+        auto perAxisQuantParams = operand.extraParams.channelQuant();
+
+        ret.SetQuantizationScales(perAxisQuantParams.scales);
+        ret.SetQuantizationDim(MakeOptional<unsigned int>(perAxisQuantParams.channelDim));
+    }
+    else
+    {
+        ret.SetQuantizationScale(operand.scale);
+        ret.SetQuantizationOffset(operand.zeroPoint);
+    }
 
     return ret;
 }
-- 
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