[TOP][ARM] Winograd nnpack backend

include/tvm/relay/attrs/nn.h

@@ -155,6 +155,24 @@ struct Conv2DWinogradAttrs : public tvm::AttrsNode<Conv2DWinogradAttrs> {
   }
 };
 
+/*! \brief Attributes used in winograd weight transformation operators */
+struct Conv2DWinogradNNPACKWeightTransformAttrs
+    : public tvm::AttrsNode<Conv2DWinogradNNPACKWeightTransformAttrs> {
+  int convolution_algorithm;
+  DataType out_dtype;
+
+  TVM_DECLARE_ATTRS(Conv2DWinogradNNPACKWeightTransformAttrs,
+                    "relay.attrs.Conv2DWinogradNNPACKWeightTransformAttrs") {
+    TVM_ATTR_FIELD(convolution_algorithm)
+        .describe(
+            "The convolution algorithm for Winograd NNPACK. "
+            "E.g. tvm.contrib.nnpack.ConvolutionAlgorithm.WT_8x8 for WT_8x8, "
+            "tvm.contrib.nnpack.ConvolutionAlgorithm.WT_8x8_FP16 for WT_8x8_FP16");
+    TVM_ATTR_FIELD(out_dtype)
+        .set_default(NullValue<DataType>())
+        .describe("Output data type, set to explicit type under mixed precision setting");
+  }
+};
 
 /*! \brief Attributes used in softmax operators */
 struct SoftmaxAttrs : public tvm::AttrsNode<SoftmaxAttrs> {

nnvm/include/nnvm/top/nn.h

@@ -183,6 +183,26 @@ struct WinogradWeightTransformParam : public dmlc::Parameter<WinogradWeightTrans
     static const constexpr int kWeight = 0;
 };
 
+struct WinogradNNPACKWeightTransformParam
+    : public dmlc::Parameter<WinogradNNPACKWeightTransformParam> {
+  int convolution_algorithm;
+  int out_dtype;
+
+  DMLC_DECLARE_PARAMETER(WinogradNNPACKWeightTransformParam) {
+    DMLC_DECLARE_FIELD(convolution_algorithm)
+        .describe(
+            "The convolution algorithm for Winograd NNPACK. "
+            "E.g. tvm.contrib.nnpack.ConvolutionAlgorithm.WT_8x8 for WT_8x8, "
+            "tvm.contrib.nnpack.ConvolutionAlgorithm.WT_8x8_FP16 for WT_8x8_FP16");
+    DMLC_DECLARE_DTYPE_FIELD(out_dtype)
+        .add_enum("same", -1)
+        .set_default(-1)
+        .describe("Output data type, set to explicit type under mixed precision setting");
+  }
+
+  static const constexpr int kWeight = 0;
+};
+
 struct WinogradConv2DParam : public dmlc::Parameter<WinogradConv2DParam> {
   int channels;
   TShape kernel_size;

nnvm/python/nnvm/top/nn.py

@@ -161,6 +161,10 @@ def alter_conv2d_layout(attrs, inputs, tinfos):
             sym.contrib.conv2d_winograd_without_weight_transform
     sym.contrib_conv2d_winograd_weight_transform = \
             sym.contrib.conv2d_winograd_weight_transform
+    sym.contrib_conv2d_winograd_nnpack_without_weight_transform = \
+            sym.contrib.conv2d_winograd_nnpack_without_weight_transform
+    sym.contrib_conv2d_winograd_nnpack_weight_transform = \
+            sym.contrib.conv2d_winograd_nnpack_weight_transform
     sym.nn = sym
 
     # map relay argument names to nnvm argument names
@@ -274,6 +278,49 @@ def schedule_contrib_conv2d_winograd_without_weight_transform(attrs, outs, targe
                      OpPattern.OUT_ELEMWISE_FUSABLE)
 
 
+@reg.register_compute("_contrib_conv2d_winograd_nnpack_weight_transform")
+def compute_contrib_conv2d_winograd_nnpack_weight_transform(attrs, inputs, _):
+    convolution_algorithm = attrs.get_int('convolution_algorithm')
+    out_dype = attrs.get_str('out_dtype')
+    return topi.nn.conv2d_winograd_nnpack_weight_transform(
+        inputs[0], convolution_algorithm, out_dype)
+
+
+@reg.register_schedule("_contrib_conv2d_winograd_nnpack_weight_transform")
+def schedule_contrib_conv2d_winograd_nnpack_weight_transform(attrs, outs, target):
+    with tvm.target.create(target):
+        return topi.generic.schedule_conv2d_winograd_nnpack_weight_transform(outs)
+
+reg.register_pattern("_contrib_conv2d_winograd_nnpack_weight_transform", OpPattern.OPAQUE)
+
+
+@reg.register_compute("_contrib_conv2d_winograd_nnpack_without_weight_transform")
+def compute_contrib_conv2d_winograd_nnpack_without_weight_transform(attrs, inputs, _):
+    padding = attrs.get_int_tuple("padding")
+    strides = attrs.get_int_tuple("strides")
+    dilation = attrs.get_int_tuple("dilation")
+    groups = attrs.get_int("groups")
+    layout = attrs.get_str("layout")
+    out_dtype = attrs.get_str("out_dtype")
+    out_dtype = inputs[0].dtype if out_dtype == "same" else out_dtype
+    assert dilation == (1, 1), "Do not support dilate now"
+    assert groups == 1, "Do not supoort arbitrary group number"
+
+    # pylint: disable=assignment-from-no-return
+    out = topi.nn.conv2d_winograd_nnpack_without_weight_transform(
+        inputs[0], inputs[1], inputs[2] if attrs.get_bool("use_bias") else None,
+        strides, padding, dilation, layout, out_dtype)
+    return out
+
+@reg.register_schedule("_contrib_conv2d_winograd_nnpack_without_weight_transform")
+def schedule_contrib_conv2d_winograd_nnpack_without_weight_transform(attrs, outs, target):
+    with tvm.target.create(target):
+        return topi.generic.schedule_conv2d_winograd_nnpack_without_weight_transform(outs)
+
+reg.register_pattern("_contrib_conv2d_winograd_nnpack_without_weight_transform",
+                     OpPattern.OPAQUE)
+
+
 # conv2d_transpose
 @reg.register_compute("conv2d_transpose")
 def compute_conv2d_transpose(attrs, inputs, _):

nnvm/src/top/nn/convolution.cc

@@ -130,13 +130,14 @@ inline bool Conv2DInferShape(const nnvm::NodeAttrs& attrs,
   return true;
 }
 
+template<class Param>
 inline bool WinogradConv2DInferShape(const nnvm::NodeAttrs& attrs,
                                      std::vector<TShape>* in_shape,
                                      std::vector<TShape>* out_shape) {
   static const Layout kNCHW("NCHW");
   static const Layout kOIHW("OIHW");
 
-  const WinogradConv2DParam& param = nnvm::get<WinogradConv2DParam>(attrs.parsed);
+  const Param& param = nnvm::get<Param>(attrs.parsed);
 
   const Layout in_layout(param.layout);
   const Layout kernel_layout(param.kernel_layout);
@@ -403,7 +404,7 @@ NNVM_REGISTER_OP(_contrib_conv2d_winograd_without_weight_transform)
 .set_attr_parser(ParamParser<WinogradConv2DParam>)
 .set_attr<FGetAttrDict>("FGetAttrDict", ParamGetAttrDict<WinogradConv2DParam>)
 .set_attr<FListInputNames>("FListInputNames", UseBiasListInputNames<WinogradConv2DParam>)
-.set_attr<FInferShape>("FInferShape", WinogradConv2DInferShape)
+.set_attr<FInferShape>("FInferShape", WinogradConv2DInferShape<WinogradConv2DParam>)
 .set_attr<FInferType>("FInferType", Conv2DInferType<WinogradConv2DParam>)
 .set_attr<FCorrectLayout>("FCorrectLayout", Conv2DCorrectLayout<WinogradConv2DParam>)
 .set_num_outputs(1)
@@ -412,6 +413,82 @@ NNVM_REGISTER_OP(_contrib_conv2d_winograd_without_weight_transform)
 
 DMLC_REGISTER_PARAMETER(WinogradConv2DParam);
 
+
+inline bool Conv2DWinogradNNPACKWTInferType(const nnvm::NodeAttrs& attrs,
+                                            std::vector<int>* in_type,
+                                            std::vector<int>* out_type) {
+  const WinogradNNPACKWeightTransformParam& param =
+      nnvm::get<WinogradNNPACKWeightTransformParam>(attrs.parsed);
+
+  CHECK_EQ(in_type->size(), 1U) << "Input:[weight]";
+  CHECK_EQ(out_type->size(), 1U);
+
+  if (param.out_dtype != -1) {
+    NNVM_ASSIGN_OUTPUT_TYPE(attrs, *out_type, 0, param.out_dtype);
+  } else {
+    ElemwiseType<1, 1>(attrs, in_type, out_type);
+  }
+  return true;
+}
+
+NNVM_REGISTER_OP(_contrib_conv2d_winograd_nnpack_weight_transform)
+.describe(R"code(Weight transformation of winograd fast convolution algorithm.
+Separate this into another nnvm symbol in order to enable Precompute Pass to compute the
+weight transformation in advance.
+- **weight**: (channels, in_channels, kernel_size[0], kernel_size[1])
+)code" NNVM_ADD_FILELINE)
+.add_argument("weight", "4D Tensor", "Weight tensor.")
+.add_arguments(WinogradNNPACKWeightTransformParam::__FIELDS__())
+.set_attr_parser(ParamParser<WinogradNNPACKWeightTransformParam>)
+.set_attr<FGetAttrDict>("FGetAttrDict", ParamGetAttrDict<WinogradNNPACKWeightTransformParam>)
+.set_attr<FInferShape>("FInferShape", [](const nnvm::NodeAttrs& attrs,
+                                         std::vector<TShape> *in_shape,
+                                         std::vector<TShape> *out_shape) {
+  const TShape &wshape = (*in_shape)[0];
+  CHECK_EQ(wshape.ndim(), 4) << "Weight should be a 4 dimensional tensor";
+  TShape oshape({wshape[0], wshape[1], 8, 8});
+  NNVM_ASSIGN_OUTPUT_SHAPE(attrs, *out_shape, 0, oshape);
+  return true;
+})
+.set_attr<FCorrectLayout>("FCorrectLayout", [](const NodeAttrs& attrs,
+                                              std::vector<Layout> *ilayouts,
+                                              const std::vector<Layout> *last_ilayouts,
+                                              std::vector<Layout> *olayouts) {
+  Layout layout("OIHW");
+  NNVM_ASSIGN_LAYOUT(*ilayouts, 0, layout);
+  NNVM_ASSIGN_LAYOUT(*olayouts, 0, layout);
+  return true;
+})
+.set_attr<FInferType>("FInferType", Conv2DWinogradNNPACKWTInferType)
+.set_num_outputs(1)
+.set_num_inputs(1)
+.set_support_level(5);
+
+DMLC_REGISTER_PARAMETER(WinogradNNPACKWeightTransformParam);
+
+NNVM_REGISTER_OP(_contrib_conv2d_winograd_nnpack_without_weight_transform)
+.describe(R"code(Compute conv2d with winograd nnpack.
+- **data**: Input is 4D array of shape  (batch_size, in_channels, height, width)
+- **weight**: Any shape
+            We do not check shape for this input tensor.
+- **bias**: (channels,)
+- **out**:  Output is 4D array of shape (batch_size, channels, out_height, out_width)
+)code" NNVM_ADD_FILELINE)
+.add_argument("data", "4D Tensor", "Input data.")
+.add_argument("weight", "4D Tensor", "Transformed weight tensor.")
+.add_argument("bias", "1D Tensor", "Bias parameter.")
+.add_arguments(Conv2DParam::__FIELDS__())
+.set_attr_parser(ParamParser<Conv2DParam>)
+.set_attr<FGetAttrDict>("FGetAttrDict", ParamGetAttrDict<Conv2DParam>)
+.set_attr<FListInputNames>("FListInputNames", UseBiasListInputNames<Conv2DParam>)
+.set_attr<FInferShape>("FInferShape", WinogradConv2DInferShape<Conv2DParam>)
+.set_attr<FInferType>("FInferType", Conv2DInferType<Conv2DParam>)
+.set_attr<FCorrectLayout>("FCorrectLayout", Conv2DCorrectLayout<Conv2DParam>)
+.set_num_outputs(1)
+.set_num_inputs(UseBiasNumInputs<Conv2DParam>)
+.set_support_level(5);
+
+
 NNVM_REGISTER_OP(_conv2d_grad)
   .describe(R"code(2D convolution grad.
 

python/tvm/contrib/nnpack.py

@@ -149,11 +149,12 @@ def convolution_inference_without_weight_transform(
             ins[1],
             ins[2] if bias is not None else 0,
             outs[0], padding[0], padding[1], padding[2], padding[3],
-            stride[0], stride[1], nthreads, algorithm), name="C")
+            stride[0], stride[1], nthreads, algorithm), name="C", dtype='float32')
 
 def convolution_inference_weight_transform(
         kernel, nthreads=1,
-        algorithm=ConvolutionAlgorithm.AUTO):
+        algorithm=ConvolutionAlgorithm.AUTO,
+        dtype='float32'):
     """Create an extern op to do inference convolution of 3D tensor data and
     4D tensor kernel and 1D tensor bias with nnpack.
 
@@ -171,13 +172,14 @@ def convolution_inference_weight_transform(
     """
     assert algorithm in (ConvolutionAlgorithm.WT_8x8, ConvolutionAlgorithm.WT_8x8_FP16)
     output_channels, input_channels, _, _ = kernel.shape
-
     transform_tile_size = 8
+    if not isinstance(dtype, str):
+        dtype = dtype.dtype
     return _api.extern(
         (output_channels, input_channels, transform_tile_size, transform_tile_size),
         [kernel],
         lambda ins, outs: _intrin.call_packed(
             "tvm.contrib.nnpack.convolution_inference_weight_transform",
-            ins[0], outs[0], nthreads, algorithm), name="transform_kernel")
+            ins[0], outs[0], nthreads, algorithm), name="transform_kernel", dtype=dtype)
 
 _init_api("tvm.contrib.nnpack")

python/tvm/relay/op/nn/_nn.py

@@ -326,6 +326,58 @@ def schedule_contrib_conv2d_winograd_weight_transform(attrs, outs, target):
 reg.register_pattern("nn.contrib_conv2d_winograd_weight_transform",
                      OpPattern.OUT_ELEMWISE_FUSABLE)
 
+
+# winograd nnpack related operators
+@reg.register_compute("nn.contrib_conv2d_winograd_nnpack_without_weight_transform")
+def compute_contrib_conv2d_winograd_nnpack_without_weight_transform(
+        attrs, inputs, out_dtype, target):
+    """Compute definition of conv2d_winograd_nnpack_without_weight_transform"""
+    # pylint: disable=assignment-from-no-return
+    padding = attrs.get_int_tuple("padding")
+    strides = attrs.get_int_tuple("strides")
+    dilation = attrs.get_int_tuple("dilation")
+    groups = attrs.get_int("groups")
+    data_layout = attrs.get_str("data_layout")
+    out_dtype = attrs.get_str("out_dtype")
+    out_dtype = inputs[0].dtype if out_dtype == "" else out_dtype
+    assert dilation == (1, 1), "Do not support dilate now"
+    assert groups == 1, "Do not supoort arbitrary group number"
+
+    # No bias
+    out = topi.nn.conv2d_winograd_nnpack_without_weight_transform(
+        inputs[0], inputs[1], None, strides, padding, dilation, data_layout,
+        out_dtype)
+
+    return [out]
+
+@reg.register_schedule("nn.contrib_conv2d_winograd_nnpack_without_weight_transform")
+def schedule_contrib_conv2d_winograd_nnpack_without_weight_transform(attrs, outs, target):
+    """Schedule definition of conv2d_winograd_nnpack_without_weight_transform"""
+    with target:
+        return topi.generic.schedule_conv2d_winograd_nnpack_without_weight_transform(outs)
+
+reg.register_pattern("nn.contrib_conv2d_winograd_nnpack_without_weight_transform",
+                     OpPattern.OPAQUE)
+
+
+@reg.register_compute("nn.contrib_conv2d_winograd_nnpack_weight_transform")
+def compute_contrib_conv2d_winograd_nnpack_weight_transform(attrs, inputs, out_dtype, target):
+    """Compute definition of contrib_conv2d_winograd_nnpack_weight_transform"""
+    convolution_algorithm = attrs.get_int('convolution_algorithm')
+    out = topi.nn.conv2d_winograd_nnpack_weight_transform(
+        inputs[0], convolution_algorithm, out_dtype)
+    return [out]
+
+@reg.register_schedule("nn.contrib_conv2d_winograd_nnpack_weight_transform")
+def schedule_contrib_conv2d_winograd_nnpack_weight_transform(attrs, outs, target):
+    """Schedule definition of contrib_conv2d_winograd_nnpack_weight_transform"""
+    with target:
+        return topi.generic.schedule_conv2d_winograd_nnpack_weight_transform(outs)
+
+reg.register_pattern("nn.contrib_conv2d_winograd_nnpack_weight_transform",
+                     OpPattern.OPAQUE)
+
+
 @reg.register_compute("nn.contrib_conv2d_NCHWc")
 def compute_contrib_conv2d_NCHWc(attrs, inputs, out_dtype, target):
     """Compute definition of conv2d NCHWc"""