From efdbca6b1a25dbd491be7f308dd729ff2255bb28 Mon Sep 17 00:00:00 2001
From: Matthew Bentham <matthew.bentham@arm.com>
Date: Sat, 14 Sep 2019 23:35:28 +0100
Subject: Rename variables in CopyTensorContents to assume NHWC

Change-Id: I533991c8829256570529c18023a5e882878cc85a
Signed-off-by: Matthew Bentham <matthew.bentham@arm.com>
---
 src/backends/backendsCommon/WorkloadUtils.hpp | 40 ++++++++++++++-------------
 1 file changed, 21 insertions(+), 19 deletions(-)

(limited to 'src/backends/backendsCommon/WorkloadUtils.hpp')

diff --git a/src/backends/backendsCommon/WorkloadUtils.hpp b/src/backends/backendsCommon/WorkloadUtils.hpp
index ba69255183..3e0c40d890 100644
--- a/src/backends/backendsCommon/WorkloadUtils.hpp
+++ b/src/backends/backendsCommon/WorkloadUtils.hpp
@@ -46,6 +46,8 @@ void AssignValues(unsigned int num, unsigned int idx, const ArrayType& array, T&
 template <typename CopyFunc>
 void CopyTensorContentsGeneric(const ITensorHandle* srcTensor, ITensorHandle* dstTensor, CopyFunc copy)
 {
+    // For ease of understanding, names are assigned to the dimensions
+    // of the tensor as if NHWC, however this routine works with any 5D tensor
     static_assert(MaxNumOfTensorDimensions == 5, "Please update CopyTensorContents");
 
     TensorShape srcStrides      = srcTensor->GetStrides();
@@ -55,57 +57,57 @@ void CopyTensorContentsGeneric(const ITensorHandle* srcTensor, ITensorHandle* ds
 
     size_t srcDepth    = 1;
     size_t srcBatches  = 1;
-    size_t srcChannels = 1;
     size_t srcHeight   = 1;
     size_t srcWidth    = 1;
+    size_t srcChannels = 1;
     AssignValues(srcShape.GetNumDimensions(),
                  0,
                  srcShape,
+                 srcChannels,
                  srcWidth,
                  srcHeight,
-                 srcChannels,
                  srcBatches,
                  srcDepth);
 
     size_t srcDepthStride   = 0;
     size_t srcBatchStride   = 0;
-    size_t srcChannelStride = 0;
     size_t srcHeightStride  = 0;
     size_t srcWidthStride   = 0;
+    size_t srcChannelStride = 0;
     AssignValues(srcStrides.GetNumDimensions(),
                  0,
                  srcStrides,
+                 srcChannelStride,
                  srcWidthStride,
                  srcHeightStride,
-                 srcChannelStride,
                  srcBatchStride,
                  srcDepthStride);
 
     size_t dstDepth    = 1;
     size_t dstBatches  = 1;
-    size_t dstChannels = 1;
     size_t dstHeight   = 1;
     size_t dstWidth    = 1;
+    size_t dstChannels = 1;
     AssignValues(dstShape.GetNumDimensions(),
                  0,
                  dstShape,
+                 dstChannels,
                  dstWidth,
                  dstHeight,
-                 dstChannels,
                  dstBatches,
                  dstDepth);
 
     size_t dstDepthStride   = 0;
     size_t dstBatchStride   = 0;
-    size_t dstChannelStride = 0;
     size_t dstHeightStride  = 0;
     size_t dstWidthStride   = 0;
+    size_t dstChannelStride = 0;
     AssignValues(dstStrides.GetNumDimensions(),
                  0,
                  dstStrides,
+                 dstChannelStride,
                  dstWidthStride,
                  dstHeightStride,
-                 dstChannelStride,
                  dstBatchStride,
                  dstDepthStride);
 
@@ -117,11 +119,11 @@ void CopyTensorContentsGeneric(const ITensorHandle* srcTensor, ITensorHandle* ds
         dstData = static_cast<uint8_t*>(dstTensor->Map());
     }
 
-    size_t copyLength   = std::min(srcWidth * srcWidthStride, dstWidth * dstWidthStride);
-    size_t copyHeight   = std::min(srcHeight, dstHeight);
-    size_t copyChannels = std::min(srcChannels, dstChannels);
-    size_t copyBatches  = std::min(srcBatches, dstBatches);
-    size_t copyDepth    = std::min(srcDepth, dstDepth);
+    size_t copyLength  = std::min(srcChannels*srcChannelStride, dstChannels*dstChannelStride);
+    size_t copyWidth   = std::min(srcWidth, dstWidth);
+    size_t copyHeight  = std::min(srcHeight, dstHeight);
+    size_t copyBatches = std::min(srcBatches, dstBatches);
+    size_t copyDepth   = std::min(srcDepth, dstDepth);
 
     for (unsigned int d = 0; d < copyDepth; ++d)
     {
@@ -131,18 +133,18 @@ void CopyTensorContentsGeneric(const ITensorHandle* srcTensor, ITensorHandle* ds
         {
             auto srcPtrBatch = srcData;
             auto dstPtrBatch = dstData;
-            for (unsigned int c = 0; c < copyChannels; ++c)
+            for (unsigned int h = 0; h < copyHeight; ++h)
             {
                 auto srcPtrChannel = srcData;
                 auto dstPtrChannel = dstData;
-                for (unsigned int h = 0; h < copyHeight; ++h)
+                for (unsigned int w = 0; w < copyWidth; ++w)
                 {
                     copy(dstData, srcData, copyLength);
-                    dstData += dstHeightStride;
-                    srcData += srcHeightStride;
+                    dstData += dstWidthStride;
+                    srcData += srcWidthStride;
                 }
-                dstData += (static_cast<long>(dstChannelStride) - (dstData - dstPtrChannel));
-                srcData += (static_cast<long>(srcChannelStride) - (srcData - srcPtrChannel));
+                dstData += (static_cast<long>(dstHeightStride) - (dstData - dstPtrChannel));
+                srcData += (static_cast<long>(srcHeightStride) - (srcData - srcPtrChannel));
             }
             dstData += (static_cast<long>(dstBatchStride) - (dstData - dstPtrBatch));
             srcData += (static_cast<long>(srcBatchStride) - (srcData - srcPtrBatch));
-- 
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