def split(g, self, split_size_or_sizes, dim, _outputs=None):
if not sym_help._is_split_static(split_size_or_sizes, _outputs):
split_out = g.op("SplitToSequence",
self,
split_size_or_sizes,
axis_i=dim)
if _outputs is None:
return split_out
# Convert to multiple slice nodes iff number of splits and number of outputs are statically known.
if sym_help._is_packed_list(split_size_or_sizes) and len(
sym_help._unpack_list(split_size_or_sizes)) == _outputs:
split_sizes = [
sym_help._unsqueeze_helper(g, v, [0])
for v in sym_help._unpack_list(split_size_or_sizes)
]
start = g.op("Constant",
value_t=torch.tensor([0], dtype=torch.long))
axis = g.op("Constant",
value_t=torch.tensor([dim], dtype=torch.long))
res = []
for i in range(_outputs):
end = g.op(
"Add", start, split_sizes[i]
) # split_sizes is a list of same length as _outputs
res.append(g.op("Slice", self, start, end, axis))
start = end
return res
return [
g.op("SequenceAt", split_out,
g.op("Constant", value_t=torch.tensor([i], dtype=torch.long)))
for i in range(_outputs)
]
else:
return torch.onnx.symbolic_opset9.split(g, self, split_size_or_sizes,
dim, _outputs)
def split(g, self, split_size_or_sizes, dim, _outputs=None):
if not sym_help._is_split_static(split_size_or_sizes, _outputs):
split_out = g.op("SplitToSequence", self, split_size_or_sizes, axis_i=dim)
if _outputs is None:
return split_out
# Convert to multiple slice nodes iff number of splits and number of outputs are statically known.
if sym_help._is_packed_list(split_size_or_sizes) and \
len(sym_help._unpack_list(split_size_or_sizes)) == _outputs:
split_sizes = [sym_help._unsqueeze_helper(g, v, [0]) for v in sym_help._unpack_list(split_size_or_sizes)]
start = g.op("Constant", value_t=torch.tensor([0], dtype=torch.long))
axis = g.op("Constant", value_t=torch.tensor([dim], dtype=torch.long))
res = []
for i in range(_outputs):
end = g.op("Add", start, split_sizes[i]) # split_sizes is a list of same length as _outputs
res.append(g.op("Slice", self, start, end, axis))
start = end
return res
return [g.op("SequenceAt", split_out, g.op("Constant", value_t=torch.tensor([i], dtype=torch.long)))
for i in range(_outputs)]
split_val = split_size_or_sizes.node()['value']
if split_val.dim() > 0:
return g.op("Split", self, split_size_or_sizes, axis_i=dim, outputs=_outputs)
split_size = sym_help._get_const(split_size_or_sizes, 'i', 'split_size')
size = self.type().sizes()[dim]
splits = [split_size] * (size // split_size)
leftover = size % split_size
if leftover:
splits.append(leftover)
splits = g.op("Constant", value_t=torch.tensor(splits))
return g.op("Split", self, splits, axis_i=dim, outputs=_outputs)
def split(g, self, split_size_or_sizes, dim, _outputs=None):
if not symbolic_helper._is_split_static(split_size_or_sizes, _outputs):
split_out = g.op("SplitToSequence",
self,
split_size_or_sizes,
axis_i=dim)
if _outputs is None:
return split_out
# Convert to multiple slice nodes iff number of splits and number of outputs are statically known.
if (symbolic_helper._is_packed_list(split_size_or_sizes)
and len(symbolic_helper._unpack_list(split_size_or_sizes))
== _outputs):
split_sizes = [
symbolic_helper._unsqueeze_helper(g, v, [0])
for v in symbolic_helper._unpack_list(split_size_or_sizes)
]
start = g.op("Constant",
value_t=torch.tensor([0], dtype=torch.long))
axis = g.op("Constant",
value_t=torch.tensor([dim], dtype=torch.long))
res = []
for i in range(_outputs):
end = g.op(
"Add", start, split_sizes[i]
) # split_sizes is a list of same length as _outputs
res.append(g.op("Slice", self, start, end, axis))
start = end
return res
return [
g.op(
"SequenceAt",
split_out,
g.op("Constant", value_t=torch.tensor([i], dtype=torch.long)),
) for i in range(_outputs)
]
split_val = split_size_or_sizes.node()["value"]
if split_val.dim() > 0:
return g.op("Split",
self,
split_size_or_sizes,
axis_i=dim,
outputs=_outputs)
split_size = symbolic_helper._get_const(split_size_or_sizes, "i",
"split_size")
size = symbolic_helper._get_tensor_dim_size(self, dim)
if size is None:
if _outputs is not None:
size = split_size * _outputs
else:
raise RuntimeError("Unknown dimension size not supported")
splits = [split_size] * (size // split_size)
leftover = size % split_size
if leftover:
splits.append(leftover)
splits = g.op("Constant", value_t=torch.tensor(splits))
return g.op("Split", self, splits, axis_i=dim, outputs=_outputs)
def split(g, self, split_size_or_sizes, dim, _outputs=None):
if not sym_help._is_split_static(split_size_or_sizes, _outputs):
split_out = g.op("SplitToSequence", self, split_size_or_sizes, axis_i=dim)
if _outputs is None:
return split_out
return [g.op("SequenceAt", split_out, g.op("Constant", value_t=torch.tensor([i], dtype=torch.long)))
for i in range(_outputs)]
else:
return torch.onnx.symbolic_opset9.split(g, self, split_size_or_sizes, dim, _outputs)
def tensor_split(g, self, indices_or_sections, dim, _outputs=None):
axis = g.op("Constant", value_t=torch.tensor(dim, dtype=torch.long))
axis = opset11.unsqueeze(g, axis, 0)
const_1 = g.op("Constant", value_t=torch.tensor(1, dtype=torch.long))
if symbolic_helper._is_split_static(indices_or_sections, _outputs):
split_val = symbolic_helper._node_get(indices_or_sections.node(), "value")
if split_val.dim() > 0:
start = g.op("Constant", value_t=torch.tensor([0], dtype=torch.long))
res = []
assert _outputs is not None
for i in range(_outputs - 1):
end = g.op(
"Gather",
indices_or_sections,
g.op("Constant", value_t=torch.tensor([i], dtype=torch.long)),
axis_i=0,
)
res.append(g.op("Slice", self, start, end, axis))
start = end
end = symbolic_helper._size_helper(g, self, axis)
res.append(g.op("Slice", self, start, end, axis))
return res
split_size = symbolic_helper._get_const(
indices_or_sections, "i", "indices_or_sections"
)
size = symbolic_helper._get_tensor_dim_size(self, dim)
if size is None:
if _outputs is not None:
size = split_size * _outputs
else:
raise errors.SymbolicValueError(
"Unknown dimension size not supported", self
)
min_split_size = size // split_size
num_splits_one_extra = size % split_size
splits = num_splits_one_extra * [min_split_size + 1]
leftover = (split_size - num_splits_one_extra) * [min_split_size]
splits = g.op(
"Constant", value_t=torch.tensor(splits + leftover, dtype=torch.long)
)
return g.op("Split", self, splits, axis_i=dim, outputs=_outputs)
if (
symbolic_helper._is_tensor(indices_or_sections)
and symbolic_helper._get_tensor_rank(indices_or_sections) == 1
):
loop_len = symbolic_helper._size_helper(
g, indices_or_sections, g.op("Constant", value_t=torch.tensor(0))
)
loop_len = opset11.unsqueeze(g, loop_len, 0)
loop_condition = g.op("Cast", const_1, to_i=_C_onnx.TensorProtoDataType.BOOL)
# To make the first slice in the below loop work,
# we pad a zero to the first position so that it will be the initial start of slice.
padding_0 = g.op("Constant", value_t=torch.tensor([0], dtype=torch.long))
indices_or_sections = g.op("Concat", padding_0, indices_or_sections, axis_i=0)
final_splits = g.op("SequenceEmpty")
loop = g.op("Loop", loop_len, loop_condition, final_splits)
# Loop inputs
loop_block = utils._add_block(loop.node())
block_input_iter = utils._add_input_to_block(loop_block)
cond = utils._add_input_to_block(loop_block)
final_splits = utils._add_input_to_block(loop_block)
start = loop_block.op("Gather", indices_or_sections, block_input_iter, axis_i=0)
end = loop_block.op(
"Gather",
indices_or_sections,
loop_block.op("Add", block_input_iter, const_1),
axis_i=0,
)
slice = loop_block.op("Slice", self, start, end, axis)
final_splits = loop_block.op("SequenceInsert", final_splits, slice)
# Loop outputs
cond_out = loop_block.op("Identity", loop_condition)
utils._add_output_to_block(loop_block, cond_out)
utils._add_output_to_block(loop_block, final_splits)
loop_out = loop.node().output()
start = g.op(
"Gather",
indices_or_sections,
g.op("Constant", value_t=torch.tensor(-1, dtype=torch.long)),
axis_i=0,
)
start = opset11.unsqueeze(g, start, 0)
end = symbolic_helper._size_helper(g, self, axis)
last_slice = g.op("Slice", self, start, end, axis)
return g.op("SequenceInsert", loop_out, last_slice)
else: # scalar tensor
dim_size = symbolic_helper._size_helper(g, self, axis)
min_split_size = g.op("Div", dim_size, indices_or_sections)
min_split_size_plus_1 = g.op(
"Add",
min_split_size,
const_1,
)
num_splits_one_extra = g.op("Mod", dim_size, indices_or_sections)
splits = g.op("Tile", min_split_size_plus_1, num_splits_one_extra)
leftover = g.op(
"Tile",
min_split_size,
g.op(
"Sub",
opset11.unsqueeze(g, indices_or_sections, 0),
num_splits_one_extra,
),
)
splits = g.op("Concat", splits, leftover, axis_i=0)
if _outputs is None:
return g.op("SplitToSequence", self, splits, axis_i=dim)
return g.op("Split", self, splits, axis_i=dim, outputs=_outputs)