_nn.py

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# to you under the Apache License, Version 2.0 (the
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#
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# specific language governing permissions and limitations
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# pylint: disable=no-else-return, invalid-name, unused-argument, too-many-arguments
"""Backend compiler related feature registration"""
from __future__ import absolute_import

import topi
from topi.util import get_const_tuple
from .. import op as reg
from ..op import OpPattern, schedule_injective
from .._tensor import elemwise_shape_func
from ....api import convert
from ....hybrid import script

# relu
reg.register_schedule("nn.relu", schedule_injective)
reg.register_pattern("nn.relu", OpPattern.ELEMWISE)

# softmax
@reg.register_schedule("nn.softmax")
def schedule_softmax(_, outputs, target):
    """Schedule definition of softmax"""
    with target:
        return topi.generic.schedule_softmax(outputs)


reg.register_pattern("nn.softmax", OpPattern.OPAQUE)

schedule_broadcast = schedule_injective


@reg.register_schedule("nn.log_softmax")
def schedule_log_softmax(_, outputs, target):
    """Schedule definition of log_softmax"""
    with target:
        return topi.generic.schedule_softmax(outputs)


reg.register_pattern("nn.log_softmax", OpPattern.OPAQUE)


# dense
@reg.register_compute("nn.dense")
def compute_dense(attrs, inputs, out_type, target):
    """Compute definition of dense"""
    out_dtype = attrs.out_dtype
    out_dtype = inputs[0].dtype if out_dtype == "" else out_dtype
    return [topi.nn.dense(inputs[0], inputs[1], None, out_dtype)]


@reg.register_schedule("nn.dense")
def schedule_dense(attrs, outputs, target):
    """Schedule definition of dense"""
    with target:
        return topi.generic.schedule_dense(outputs)


reg.register_pattern("nn.dense", reg.OpPattern.OUT_ELEMWISE_FUSABLE)


@reg.register_compute('nn.fifo_buffer')
def compute_fifo_buffer(attrs, inputs, out_type, target):
    return [topi.nn.fifo_buffer(inputs[0], inputs[1], axis=attrs.get_int('axis'))]


@reg.register_schedule('nn.fifo_buffer')
def schedule_fifo_buffer(attrs, outputs, target):
    with target:
        return topi.generic.schedule_injective(outputs)


reg.register_pattern("nn.fifo_buffer", OpPattern.OPAQUE)


# batch_matmul
@reg.register_compute("nn.batch_matmul")
def compute_batch_matmul(attrs, inputs, out_type, target):
    """Compute definition of batch_matmul"""
    with target:
        return [topi.nn.batch_matmul(inputs[0], inputs[1])]


@reg.register_schedule("nn.batch_matmul")
def schedule_batch_matmul(attrs, outputs, target):
    """Schedule definition of batch_matmul"""
    with target:
        return topi.generic.schedule_batch_matmul(outputs)


reg.register_pattern("nn.batch_matmul", reg.OpPattern.OUT_ELEMWISE_FUSABLE)

# sparse_dense
@reg.register_compute("nn.sparse_dense")
def compute_sparse_dense(attrs, inputs, out_type, target):
    """Compute definition of sparse_dense"""
    return [topi.nn.sparse_dense(inputs[0], inputs[1], inputs[2], inputs[3])]

@reg.register_schedule("nn.sparse_dense")
def schedule_sparse_dense(attrs, outputs, target):
    """Schedule definition of batch_matmul"""
    with target:
        return topi.generic.schedule_sparse_dense(outputs)

reg.register_pattern("nn.sparse_dense", reg.OpPattern.OUT_ELEMWISE_FUSABLE)

# sparse_transpose
@reg.register_compute("nn.sparse_transpose")
def compute_sparse_transpose(attrs, inputs, out_type, target):
    """Compute definition of sparse_transpose"""
    return topi.nn.sparse_transpose(inputs[0], inputs[1], inputs[2])

@reg.register_schedule("nn.sparse_transpose")
def schedule_sparse_transpose(attrs, outputs, target):
    """Schedule definition of batch_matmul"""
    with target:
        return topi.generic.schedule_sparse_transpose(outputs)

reg.register_pattern("nn.sparse_transpose", reg.OpPattern.OUT_ELEMWISE_FUSABLE)

# conv2d
def _find_conv2d_op(op):
    """Find the op with conv2d in its tag by traversing."""
    if 'conv2d' in op.tag:
        return op
    for tensor in op.input_tensors:
        op_ = _find_conv2d_op(tensor.op)
        if op_ is not None:
            return op_
    return None

@reg.register_compute("nn.conv2d")
def compute_conv2d(attrs, inputs, out_type, target):
    """Compute definition of conv2d"""
    padding = get_const_tuple(attrs.padding)
    strides = get_const_tuple(attrs.strides)
    dilation = get_const_tuple(attrs.dilation)
    groups = attrs.groups
    layout = attrs.data_layout
    kernel_layout = attrs.kernel_layout
    out_dtype = attrs.out_dtype
    out_dtype = (inputs[0].dtype if out_dtype in ("same", "")
                 else out_dtype)

    assert layout in ["NCHW", "NHWC", "NCHW4c", "HWCN"]
    (dilation_h, dilation_w) = dilation
    if dilation_h < 1 or dilation_w < 1:
        raise ValueError("dilation should be positive value")

    def _get_out_depth():
        weight_shape = get_const_tuple(inputs[1].shape)
        # NHWC layout
        if kernel_layout.startswith("HW"):
            return weight_shape[2] * weight_shape[3]
        # NCHW layout.
        # in ARM CPU contrib_spatial_pack schedule, we will prepack weight layout
        if len(weight_shape) == 4:
            return weight_shape[0] * weight_shape[1]
        else:
            assert len(weight_shape) == 5
            C, M, _, _, VC = weight_shape
            return C * VC * M
    if groups == 1:
        out = topi.nn.conv2d(
            inputs[0], inputs[1], strides, padding,
            dilation, layout, out_dtype)
    elif layout == "NCHW" and _get_out_depth() == groups:
        out = topi.nn.depthwise_conv2d_nchw(
            inputs[0], inputs[1], strides, padding, dilation, out_dtype)
    elif layout == "NHWC" and kernel_layout == "HWOI" and _get_out_depth() == groups:
        out = topi.nn.depthwise_conv2d_nhwc(
            inputs[0], inputs[1], strides, padding, dilation, out_dtype)
    elif layout in ['NCHW', 'NCHW4c']:
        out = topi.nn.group_conv2d_nchw(inputs[0], inputs[1], strides, padding, dilation, groups,
                                        out_dtype)
    else:
        raise ValueError("not support arbitrary group number for now")
    return [out]


@reg.register_schedule("nn.conv2d")
def schedule_conv2d(attrs, outs, target):
    """Schedule definition of conv2d"""
    groups = attrs.groups
    layout = attrs.data_layout
    kernel_layout = attrs.kernel_layout

    with target:
        if groups == 1 and layout == "NCHW":
            return topi.generic.schedule_conv2d_nchw(outs)
        elif groups == 1 and layout == "NCHW4c":
            return topi.generic.schedule_conv2d_nchw(outs)
        elif groups == 1 and layout == "NHWC":
            return topi.generic.schedule_conv2d_nhwc(outs)
        elif groups == 1 and layout == "HWCN":
            return topi.generic.schedule_conv2d_hwcn(outs)
        elif groups != 1:
            # collect in_channels to distinguish depthwise and group conv2d
            op = _find_conv2d_op(outs[0].op)
            assert op is not None

            is_depthwise = 'depthwise' in op.tag
            if is_depthwise:
                if layout == "NCHW":
                    # TODO(leyuan, merrymercy, Huyuwei): fold depthwise topi into conv2d.
                    return topi.generic.schedule_depthwise_conv2d_nchw(outs)
                if layout == "NHWC" and kernel_layout == "HWOI":
                    return topi.generic.schedule_depthwise_conv2d_nhwc(outs)
            else:
                if layout in ["NCHW", "NCHW4c"]:
                    return topi.generic.schedule_group_conv2d_nchw(outs)
    raise ValueError("No compatible schedule")


@reg.register_alter_op_layout("nn.conv2d")
def alter_op_layout_conv2d(attrs, inputs, tinfos):
    """Alternate the layout of conv2d"""
    from ... import op
    return topi.nn.conv2d_alter_layout(attrs, inputs, tinfos, op)

@reg.register_legalize("nn.conv2d")
def legalize_conv2d(attrs, inputs, types):
    """Legalize conv2d op.

    Parameters
    ----------
    attrs : tvm.attrs.Attrs
        Attributes of current convolution
    inputs : list of tvm.relay.Expr
        The args of the Relay expr to be legalized
    types : list of types
        List of input and output types

    Returns
    -------
    result : tvm.relay.Expr
        The legalized expr
    """
    return topi.nn.conv2d_legalize(attrs, inputs, types)

reg.register_pattern("nn.conv2d", OpPattern.OUT_ELEMWISE_FUSABLE)


# conv2d_transpose
@reg.register_compute("nn.conv2d_transpose")
def compute_conv2d_transpose(attrs, inputs, out_dtype, target):
    """Compute definition of conv2d_transpose"""
    padding = get_const_tuple(attrs.padding)
    strides = get_const_tuple(attrs.strides)
    dilation = get_const_tuple(attrs.dilation)
    groups = attrs.groups
    layout = attrs.data_layout
    out_dtype = attrs.out_dtype
    out_dtype = (inputs[0].dtype if out_dtype in ("same", "")
                 else out_dtype)
    assert layout == "NCHW", "only support nchw for now"
    assert dilation == (1, 1), "not support dilate now"
    assert groups == 1, "only support groups == 1 for now"
    out = topi.nn.conv2d_transpose_nchw(
        inputs[0], inputs[1], strides, padding, out_dtype)
    output_padding = get_const_tuple(attrs.output_padding)
    out = topi.nn.pad(out,
                      [0, 0, 0, 0], [0, 0, output_padding[0], output_padding[1]])
    return [out]


@reg.register_compute("nn.conv3d")
def compute_conv3d(attrs, inputs, out_type, target):
    """Compute definition of conv3d"""
    padding = get_const_tuple(attrs.padding)
    strides = get_const_tuple(attrs.strides)
    dilation = get_const_tuple(attrs.dilation)
    groups = attrs.groups
    layout = attrs.data_layout
    out_dtype = attrs.out_dtype
    out_dtype = (inputs[0].dtype if out_dtype in ("same", "")
                 else out_dtype)

    assert layout in ["NCDHW"]
    (dilation_d, dilation_h, dilation_w) = dilation
    if dilation_d < 1 or dilation_h < 1 or dilation_w < 1:
        raise ValueError("dilation should be positive value")

    if groups == 1:
        out = topi.nn.conv3d(
            inputs[0], inputs[1], strides, padding,
            dilation, layout, out_dtype)
    else:
        raise ValueError("not support arbitrary group number for now")
    return [out]


@reg.register_schedule("nn.conv3d")
def schedule_conv3d(attrs, outs, target):
    """Schedule definition of conv3d"""
    groups = attrs.groups
    layout = attrs.data_layout

    with target:
        if groups == 1 and layout == "NCDHW":
            return topi.generic.schedule_conv3d_ncdhw(outs)

    raise ValueError("No compatible schedule")


reg.register_pattern("nn.conv3d", OpPattern.OUT_ELEMWISE_FUSABLE)


@reg.register_schedule("nn.conv2d_transpose")
def schedule_conv2d_transpose(attrs, outs, target):
    """Schedule definition of conv2d_transpose"""
    with target:
        return topi.generic.schedule_conv2d_transpose_nchw(outs)


@reg.register_legalize("nn.conv2d_transpose")
def legalize_conv2d_transpose(attrs, inputs, types):
    """Legalize conv2d_transpose op.

    Parameters
    ----------
    attrs : tvm.attrs.Attrs
        Attributes of current Transposed convolution
    inputs : list of tvm.relay.Expr
        The args of the Relay expr to be legalized
    types : list of types
        List of input and output types

    Returns
    -------
    result : tvm.relay.Expr
        The legalized expr
    """
    return topi.nn.conv2d_transpose_legalize(attrs, inputs, types)

reg.register_pattern("nn.conv2d_transpose", OpPattern.OUT_ELEMWISE_FUSABLE)

# bias_add
reg.register_schedule("nn.bias_add", schedule_injective)
reg.register_pattern("nn.bias_add", OpPattern.BROADCAST)


# max_pool2d
@reg.register_schedule("nn.max_pool2d")
def schedule_max_pool2d(attrs, outs, target):
    """Schedule definition of max_pool2d"""
    layout = attrs.layout
    with target:
        return topi.generic.schedule_pool(outs, layout)


reg.register_pattern("nn.max_pool2d", OpPattern.OUT_ELEMWISE_FUSABLE)


# avg_pool2d
@reg.register_schedule("nn.avg_pool2d")
def schedule_avg_pool2d(attrs, outs, target):
    """Schedule definition of avg_pool2d"""
    layout = attrs.layout
    with target:
        return topi.generic.schedule_pool(outs, layout)


reg.register_pattern("nn.avg_pool2d", OpPattern.OUT_ELEMWISE_FUSABLE)


# max_pool2d_grad
@reg.register_schedule("nn.max_pool2d_grad")
def schedule_max_pool2d_grad(attrs, outs, target):
    """Schedule definition of max_pool2d_grad"""
    with target:
        return topi.generic.schedule_pool_grad(outs)


reg.register_pattern("nn.max_pool2d_grad", OpPattern.OUT_ELEMWISE_FUSABLE)


# avg_pool2d_grad
@reg.register_schedule("nn.avg_pool2d_grad")
def schedule_avg_pool2d_grad(attrs, outs, target):
    """Schedule definition of avg_pool2d_grad"""
    with target:
        return topi.generic.schedule_pool_grad(outs)


reg.register_pattern("nn.avg_pool2d_grad", OpPattern.OUT_ELEMWISE_FUSABLE)


# global_max_pool2d
@reg.register_schedule("nn.global_max_pool2d")
def schedule_global_max_pool2d(_, outs, target):
    """Schedule definition of global_max_pool2d"""
    with target:
        return topi.generic.schedule_adaptive_pool(outs)


reg.register_pattern("nn.global_max_pool2d", OpPattern.OUT_ELEMWISE_FUSABLE)


# global_avg_pool2d
@reg.register_schedule("nn.global_avg_pool2d")
def schedule_global_avg_pool2d(_, outs, target):
    """Schedule definition of global_avg_pool2d"""
    with target:
        return topi.generic.schedule_adaptive_pool(outs)


reg.register_pattern("nn.global_avg_pool2d", OpPattern.OUT_ELEMWISE_FUSABLE)


# leaky_relu
reg.register_schedule("nn.leaky_relu", schedule_broadcast)
reg.register_pattern("nn.leaky_relu", OpPattern.ELEMWISE)

# prelu
reg.register_schedule("nn.prelu", schedule_broadcast)
reg.register_pattern("nn.prelu", OpPattern.BROADCAST)

# flatten
reg.register_schedule("nn.batch_flatten", schedule_broadcast)
reg.register_pattern("nn.batch_flatten", OpPattern.INJECTIVE)


# lrn
@reg.register_compute("nn.lrn")
def compute_lrn(attrs, inputs, out_dtype, target):
    """Compute definition of lrn"""
    assert len(inputs) == 1
    return [topi.nn.lrn(inputs[0], attrs.size, attrs.axis,
                        attrs.alpha, attrs.beta, attrs.bias)]


@reg.register_schedule("nn.lrn")
def schedule_lrn(attrs, outs, target):
    """Schedule definition of lrn"""
    with target:
        return topi.generic.schedule_lrn(outs)


reg.register_pattern("nn.lrn", OpPattern.OPAQUE)


# l2_normalize
@reg.register_compute("nn.l2_normalize")
def compute_l2_normalize(attrs, inputs, out_dtype, target):
    """Compute definition of l2 normalize"""
    return [topi.nn.l2_normalize(inputs[0], attrs.eps, attrs.axis)]


@reg.register_schedule("nn.l2_normalize")
def schedule_l2_normalize(attrs, outs, target):
    """Schedule definition of l2 normalize"""
    with target:
        return topi.generic.schedule_l2_normalize(outs)


reg.register_pattern("nn.l2_normalize", OpPattern.OUT_ELEMWISE_FUSABLE)

# upsampling
reg.register_schedule("nn.upsampling", reg.schedule_injective)


def schedule_upsampling(_, outs, target):
    """Schedule definition of upsampling"""
    with target:
        return topi.generic.schedule_injective(outs)

@reg.register_compute("nn.upsampling")
def compute_upsampling(attrs, inputs, out_dtype, target):
    scale_h = attrs.scale_h
    scale_w = attrs.scale_w
    layout = attrs.layout
    method = attrs.method
    align_corners = attrs.align_corners
    return [topi.nn.upsampling(inputs[0], scale_h, scale_w, layout, method, align_corners)]

# pad
reg.register_schedule("nn.pad", schedule_broadcast)

# mirror_pad
reg.register_schedule("nn.mirror_pad", schedule_broadcast)

@reg.register_compute("nn.mirror_pad")
def compute_mirror_pad(attrs, inputs, out_dtype, target):
    pad_before, pad_after = list(zip(*attrs.pad_width))
    mode = attrs.mode
    out = topi.nn.mirror_pad(inputs[0], pad_before=pad_before, pad_after=pad_after, mode=mode)
    return [out]

# winograd related operators
@reg.register_compute("nn.contrib_conv2d_winograd_without_weight_transform")
def compute_contrib_conv2d_winograd_without_weight_transform(attrs, inputs, out_dtype, target):
    """Compute definition of conv2d_winograd_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")
    tile_size = attrs.get_int("tile_size")
    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"

    out = topi.nn.conv2d_winograd_without_weight_transform(
        inputs[0], inputs[1], strides, padding, dilation, data_layout,
        out_dtype, tile_size)

    return [out]


@reg.register_schedule("nn.contrib_conv2d_winograd_without_weight_transform")
def schedule_contrib_conv2d_winograd_without_weight_transform(attrs, outs, target):
    """Schedule definition of conv2d_winograd_without_weight_transform"""
    with target:
        return topi.generic.schedule_conv2d_winograd_without_weight_transform(outs)


reg.register_pattern("nn.contrib_conv2d_winograd_without_weight_transform",
                     OpPattern.OUT_ELEMWISE_FUSABLE)


@reg.register_compute("nn.contrib_conv2d_winograd_weight_transform")
def compute_contrib_conv2d_winograd_weight_transform(attrs, inputs, out_dtype, target):
    """Compute definition of contrib_conv2d_winograd_weight_transform"""
    out = topi.nn.conv2d_winograd_weight_transform(
        inputs[0], attrs.get_int('tile_size'))
    return [out]


@reg.register_schedule("nn.contrib_conv2d_winograd_weight_transform")
def schedule_contrib_conv2d_winograd_weight_transform(attrs, outs, target):
    """Schedule definition of contrib_conv2d_winograd_weight_transform"""
    with target:
        return topi.generic.schedule_conv2d_winograd_weight_transform(outs)


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"""
    # pylint: disable=assignment-from-no-return
    padding = attrs.get_int_tuple("padding")
    strides = attrs.get_int_tuple("strides")
    dilation = attrs.get_int_tuple("dilation")
    data_layout = attrs.get_str("data_layout")
    out_layout = attrs.get_str("out_layout")
    out_dtype = attrs.get_str("out_dtype")
    out_dtype = inputs[0].dtype if out_dtype == "" else out_dtype

    out = topi.nn.conv2d_NCHWc(inputs[0], inputs[1], strides, padding, dilation,
                               data_layout, out_layout, out_dtype)
    return [out]


@reg.register_schedule("nn.contrib_conv2d_NCHWc")
def schedule_contrib_conv2d_NCHWc(attrs, outs, target):
    """Schedule definition of contrib_conv2d_NCHWc"""
    with target:
        return topi.generic.schedule_conv2d_NCHWc(outs)


reg.register_pattern("nn.contrib_conv2d_NCHWc",
                     OpPattern.OUT_ELEMWISE_FUSABLE)


@reg.register_compute("nn.contrib_conv2d_NCHWc_int8")
def compute_contrib_conv2d_NCHWc_int8(attrs, inputs, out_dtype, target):
    """Compute definition of conv2d NCHWc"""
    # pylint: disable=assignment-from-no-return
    padding = attrs.get_int_tuple("padding")
    strides = attrs.get_int_tuple("strides")
    dilation = attrs.get_int_tuple("dilation")
    data_layout = attrs.get_str("data_layout")
    out_layout = attrs.get_str("out_layout")
    out_dtype = attrs.get_str("out_dtype")
    out_dtype = inputs[0].dtype if out_dtype == "" else out_dtype

    out = topi.nn.conv2d_NCHWc_int8(inputs[0], inputs[1], strides, padding, dilation,
                                    data_layout, out_layout, out_dtype)
    return [out]


@reg.register_schedule("nn.contrib_conv2d_NCHWc_int8")
def schedule_contrib_conv2d_NCHWc_int8(attrs, outs, target):
    """Schedule definition of contrib_conv2d_NCHWc_int8"""
    with target:
        return topi.generic.schedule_conv2d_NCHWc_int8(outs)


reg.register_pattern("nn.contrib_conv2d_NCHWc_int8",
                     OpPattern.OUT_ELEMWISE_FUSABLE)


@reg.register_compute("nn.contrib_depthwise_conv2d_NCHWc")
def compute_contrib_depthwise_conv2d_NCHWc(attrs, inputs, out_dtype, target):
    """Compute definition of depthwise conv2d NCHWc"""
    # pylint: disable=assignment-from-no-return
    padding = attrs.get_int_tuple("padding")
    strides = attrs.get_int_tuple("strides")
    dilation = attrs.get_int_tuple("dilation")
    data_layout = attrs.get_str("data_layout")
    out_layout = attrs.get_str("out_layout")
    out_dtype = attrs.get_str("out_dtype")
    out_dtype = inputs[0].dtype if out_dtype == "" else out_dtype

    out = topi.nn.depthwise_conv2d_NCHWc(inputs[0], inputs[1], strides, padding, dilation,
                                         data_layout, out_layout, out_dtype)
    return [out]


@reg.register_schedule("nn.contrib_depthwise_conv2d_NCHWc")
def schedule_contrib_depthwise_conv2d_NCHWc(attrs, outs, target):
    """Schedule definition of contrib_conv2d_NCHWc"""
    with target:
        return topi.generic.schedule_depthwise_conv2d_NCHWc(outs)


reg.register_pattern("nn.contrib_depthwise_conv2d_NCHWc",
                     OpPattern.OUT_ELEMWISE_FUSABLE)


@reg.register_compute("nn.deformable_conv2d")
def compute_deformable_conv2d(attrs, inputs, out_dtype, target):
    """Compute definition of deformable_conv2d"""
    padding = get_const_tuple(attrs.padding)
    strides = get_const_tuple(attrs.strides)
    dilation = get_const_tuple(attrs.dilation)
    deformable_groups = attrs.deformable_groups
    groups = attrs.groups
    out_dtype = attrs.out_dtype
    out_dtype = inputs[0].dtype if out_dtype in ("same", "") else out_dtype
    with target:
        out = topi.nn.deformable_conv2d_nchw(inputs[0], inputs[1], inputs[2], strides, padding,
                                             dilation, deformable_groups, groups, out_dtype)
    return [out]


@reg.register_schedule("nn.deformable_conv2d")
def schedule_deformable_conv2d(attrs, outs, target):
    """Schedule definition of deformable_conv2d"""
    with target:
        return topi.generic.schedule_deformable_conv2d_nchw(outs)


reg.register_pattern("nn.deformable_conv2d", OpPattern.OUT_ELEMWISE_FUSABLE)


@reg.register_compute("nn.bitpack")
def compute_bitpack(attrs, inputs, out_dtype, target):
    """Compute definition for bitpack"""
    bits = attrs.bits
    pack_axis = attrs.pack_axis
    bit_axis = attrs.bit_axis
    pack_type = attrs.pack_type
    name = attrs.name
    with target:
        out = topi.nn.bitpack(inputs[0], bits, pack_axis, bit_axis, pack_type,
                              name)
    return [out]

@reg.register_schedule("nn.bitpack")
def schedule_bitpack(attrs, outs, target):
    with target:
        return topi.generic.schedule_bitpack(outs)

reg.register_pattern("nn.bitpack", OpPattern.INJECTIVE)


@reg.register_compute("nn.bitserial_conv2d")
def compute_bitserial_conv2d(attrs, inputs, out_dtype, target):
    """Compute definition for bitserial conv2d."""
    padding = get_const_tuple(attrs.padding)
    strides = get_const_tuple(attrs.strides)
    activation_bits = attrs.activation_bits
    weight_bits = attrs.weight_bits
    layout = attrs.data_layout
    pack_dtype = attrs.pack_dtype
    out_dtype = attrs.out_dtype
    unipolar = attrs.unipolar
    if layout == 'NCHW':
        with target:
            out = topi.nn.bitserial_conv2d_nchw(
                inputs[0], inputs[1], strides, padding, activation_bits,
                weight_bits, pack_dtype, out_dtype, unipolar)
    elif layout == 'NHWC':
        with target:
            out = topi.nn.bitserial_conv2d_nhwc(
                inputs[0], inputs[1], strides, padding, activation_bits,
                weight_bits, pack_dtype, out_dtype, unipolar)
    else:
        raise ValueError("Data layout not supported.")

    return [out]


@reg.register_schedule("nn.bitserial_conv2d")
def schedule_bitserial_conv2d(attrs, outs, target):
    """Schedule definition for bitserial conv2d."""
    layout = attrs.data_layout
    if layout == 'NCHW':
        with target:
            return topi.generic.schedule_bitserial_conv2d_nchw(outs)
    elif layout == 'NHWC':
        with target:
            return topi.generic.schedule_bitserial_conv2d_nhwc(outs)
    else:
        raise ValueError("Data layout not supported.")

@reg.register_legalize("nn.bitserial_conv2d")
def legalize_bitserial_conv2d(attrs, inputs, types):
    """Legalize bitserial_conv2d op.

    Parameters
    ----------
    attrs : tvm.attrs.Attrs
        Attributes of current convolution
    inputs : list of tvm.relay.Expr
        The args of the Relay expr to be legalized
    types : list of types
        List of input and output types

    Returns
    -------
    result : tvm.relay.Expr
        The legalized expr
    """
    return topi.nn.bitserial_conv2d_legalize(attrs, inputs, types)


reg.register_pattern("nn.bitserial_conv2d", OpPattern.OUT_ELEMWISE_FUSABLE)


# bitserial_dense
@reg.register_compute("nn.bitserial_dense")
def compute_bitserial_dense(attrs, inputs, out_type, target):
    """Compute definition of bitserial_dense"""
    data_bits = attrs.data_bits
    weight_bits = attrs.weight_bits
    pack_dtype = attrs.pack_dtype
    out_dtype = attrs.out_dtype
    out_dtype = inputs[0].dtype if out_dtype == "" else out_dtype
    unipolar = attrs.unipolar
    return [
        topi.nn.bitserial_dense(
            inputs[0],
            inputs[1],
            data_bits,
            weight_bits,
            pack_dtype,
            out_dtype,
            unipolar)
    ]


@reg.register_schedule("nn.bitserial_dense")
def schedule_bitserial_dense(attrs, outputs, target):
    """Schedule definition of bitserial_dense"""
    with target:
        return topi.generic.schedule_bitserial_dense(outputs)


reg.register_pattern("nn.bitserial_dense", reg.OpPattern.OUT_ELEMWISE_FUSABLE)


reg.register_pattern("nn.cross_entropy", OpPattern.OPAQUE)

@reg.register_compute("nn.cross_entropy")
def compute_cross_entropy(attrs, inputs, out_dtype, target):
    x, y = inputs
    return [-topi.sum(topi.log(x) * y) / x.shape[0]]


reg.register_pattern("nn.cross_entropy_with_logits", OpPattern.OPAQUE)

@reg.register_compute("nn.cross_entropy_with_logits")
def compute_cross_entropy_with_logits(attrs, inputs, out_dtype, target):
    x, y = inputs
    return [-topi.sum(x * y) / x.shape[0]]

# shape func
@script
def _conv2d_NCHWc_shape_func(dshape, kshape, strides, padding, dilation, oc_bn):
    out = output_tensor((dshape.shape[0],), "int64")
    ic_chunk = dshape[1]
    height = dshape[2]
    width = dshape[3]
    ic_bn = dshape[4]
    kheight = kshape[2]
    kwidth = kshape[3]
    dilated_kh = (kheight - 1) * dilation[0] + 1
    dilated_kw = (kwidth - 1) * dilation[1] + 1
    kflatten = int64(1)
    for i in const_range(kshape.shape[0]):
        kflatten *= kshape[i]

    oc = kflatten // (kheight * kwidth * ic_chunk * ic_bn)
    oc_chunk = oc // oc_bn

    out_height = (height + 2 * padding[0] - dilated_kh) // strides[0] + 1
    out_width = (width + 2 * padding[1] - dilated_kw) // strides[1] + 1

    out[0] = dshape[0]
    out[1] = oc_chunk
    out[2] = out_height
    out[3] = out_width
    out[4] = int64(oc_bn)
    return out

@reg.register_shape_func("nn.contrib_conv2d_NCHWc", False)
def conv2d_NCHWc_shape_func(attrs, inputs, _):
    """
    Shape function for contrib_conv2d_NCHWc op.
    """
    strides = get_const_tuple(attrs.strides)
    padding = get_const_tuple(attrs.padding)
    dilation = get_const_tuple(attrs.dilation)
    out_layout = attrs.out_layout
    oc_bn = int(out_layout[4:-1])

    return [_conv2d_NCHWc_shape_func(inputs[0], inputs[1],
                                     convert(strides), convert(padding),
                                     convert(dilation), convert(oc_bn))]

@script
def _pool2d_shape_func(data_shape, pool_size, strides,
                       padding, height_axis, width_axis):
    out = output_tensor((data_shape.shape[0],), "int64")
    for i in const_range(data_shape.shape[0]):
        if i == height_axis:
            out[i] = (data_shape[i] + padding[0] + padding[2] - pool_size[0]) // strides[0] + 1
        elif i == width_axis:
            out[i] = (data_shape[i] + padding[1] + padding[3] - pool_size[1]) // strides[1] + 1
        else:
            out[i] = data_shape[i]

    return out

def pool2d_shape_func(attrs, inputs, _):
    """
    Shape function for pool2d op.
    """
    pool_size = get_const_tuple(attrs.pool_size)
    strides = get_const_tuple(attrs.strides)
    padding = get_const_tuple(attrs.padding)
    layout = attrs.layout
    height_axis = layout.index("H")
    width_axis = layout.index("W")
    if len(padding) == 1:
        padding = [padding[0]] * 4
    elif len(padding) == 2:
        padding = [padding[0], padding[1], padding[0], padding[1]]

    return [_pool2d_shape_func(inputs[0], convert(pool_size),
                               convert(strides), convert(padding),
                               convert(height_axis), convert(width_axis))]

reg.register_shape_func("nn.max_pool2d", False, pool2d_shape_func)
reg.register_shape_func("nn.avg_pool2d", False, pool2d_shape_func)

@script
def _global_pool2d_shape_func(data_shape, height_axis, width_axis):
    out = output_tensor((data_shape.shape[0],), "int64")
    for i in const_range(out.shape[0]):
        if i == height_axis or i == width_axis:
            out[i] = int64(1)
        else:
            out[i] = data_shape[i]

    return out

def global_pool2d_shape_func(attrs, inputs, _):
    """
    Shape function for global pool2d op.
    """
    layout = attrs.layout
    height_axis = width_axis = 1
    for i, letter in enumerate(layout):
        if letter == "H":
            height_axis = i
        if letter == "W":
            width_axis = i
    return [_global_pool2d_shape_func(inputs[0], convert(height_axis), convert(width_axis))]

reg.register_shape_func("nn.global_max_pool2d", False, global_pool2d_shape_func)
reg.register_shape_func("nn.global_avg_pool2d", False, global_pool2d_shape_func)

@script
def _batch_flatten_shape_func(data_shape):
    out = output_tensor((2,), "int64")
    out[0] = data_shape[0]
    out[1] = int64(1)
    for i in const_range(data_shape.shape[0] - 1):
        out[1] *= data_shape[i + 1]

    return out

@reg.register_shape_func("nn.batch_flatten", False)
def batch_flatten_shape_func(attrs, inputs, _):
    """
    Shape function for batch_flatten op.
    """
    return [_batch_flatten_shape_func(inputs[0])]

@script
def _dense_shape_func(data_shape, weight_shape):
    out = output_tensor((data_shape.shape[0],), "int64")
    for i in const_range(out.shape[0] - 1):
        out[i] = data_shape[i]
    out[out.shape[0] - 1] = weight_shape[0]

    return out

@reg.register_shape_func("nn.dense", False)
def dense_shape_func(attrs, inputs, _):
    """
    Shape function for dense op.
    """
    ret = [_dense_shape_func(inputs[0], inputs[1])]
    return ret

@script
def _pad_shape_func(data_shape, pad_width):
    out = output_tensor((data_shape.shape[0],), "int64")
    for i in const_range(out.shape[0]):
        out[i] = data_shape[i] + pad_width[i][0] + pad_width[i][1]

    return out

@reg.register_shape_func("nn.pad", False)
def pad_shape_func(attrs, inputs, _):
    """
    Shape function for pad op.
    """
    pad_width = []
    for pair in attrs.pad_width:
        pad_width.append(get_const_tuple(pair))
    return [_pad_shape_func(inputs[0], convert(pad_width))]

reg.register_shape_func("nn.bias_add", False, elemwise_shape_func)
reg.register_shape_func("nn.softmax", False, elemwise_shape_func)
reg.register_shape_func("nn.relu", False, elemwise_shape_func)