Optimize int8 depthwise conv

src/operators/kernel/arm/quantize_kernel.cpp

@@ -88,8 +88,8 @@ template <>
 inline int8_t Round<ROUND_NEAREST_TO_EVEN>(const float &x) {
   float v = std::round(x);
   int32_t q = static_cast<int32_t>(v);
-  if (abs(abs(q - v) - 0.5) <= 0) {
-    if (abs(q) % 2 != 0) {
+  if (std::abs(std::abs(q - v) - 0.5) <= 0) {
+    if (std::abs(q) % 2 != 0) {
       q = q + ((q > 0) ? -1 : 1);
     }
   }

src/operators/kernel/central-arm-func/conv_arm_func.h

@@ -180,10 +180,10 @@ inline void DepthwiseConv3x3(const ConvParam<CPU> &param) {
     Tensor in_batch = input->Slice(i, i + 1);
     Tensor out_batch = output->Slice(i, i + 1);
     if (strides[0] == 1) {
-      math::DepthwiseConv3x3s1<Itype, Otype>(in_batch, *filter, paddings,
+      math::DepthwiseConv3x3S1<Itype, Otype>(in_batch, *filter, paddings,
                                              &out_batch);
     } else if (strides[0] == 2) {
-      math::DepthwiseConv3x3s2<Itype, Otype>(in_batch, *filter, paddings,
+      math::DepthwiseConv3x3S2<Itype, Otype>(in_batch, *filter, paddings,
                                              &out_batch);
     } else {
       // math::DepthwiseConv3x3<Itype, Otype>(input_pad, *filter,

src/operators/math/depthwise_conv3x3.h

@@ -74,13 +74,13 @@ void DepthwiseConv3x3s2p0(const framework::Tensor *input,
 //                      framework::Tensor *output);
 
 template <typename Itype, typename Otype>
-void DepthwiseConv3x3s1(const framework::Tensor &input,
+void DepthwiseConv3x3S1(const framework::Tensor &input,
                         const framework::Tensor &filter,
                         const std::vector<int> &paddings,
                         framework::Tensor *output);
 
 template <typename Itype, typename Otype>
-void DepthwiseConv3x3s2(const framework::Tensor &input,
+void DepthwiseConv3x3S2(const framework::Tensor &input,
                         const framework::Tensor &filter,
                         const std::vector<int> &paddings,
                         framework::Tensor *output);