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function_wrapper.py
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# HEY! Trying to understand what this file does? Read
# "what has to be done to add a Operation ..." first!
import re
from code_template import CodeTemplate
try:
import typing # noqa: F401
except ImportError:
raise RuntimeError(
'Missing build dependency: Unable to import the `typing` module. '
'Please install it via `conda install typing` or `pip install typing`')
# flake8 doesn't take into account usages in type annotations.
from typing import Union, Set # noqa: F401
from typing import Any, Dict, List, Optional, Tuple, NamedTuple
try:
from mypy_extensions import TypedDict
except ImportError:
# Avoid the dependency on the mypy_extensions package.
# It is required, however, for type checking.
def TypedDict(name, attrs, total=True): # type: ignore
return Dict[Any, Any]
import sys
if sys.version_info[0] == 3:
string_type = str
else:
string_type = basestring
from env import BUILD_NAMEDTENSOR
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#
# what has to be done to add a Operation ...
#
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# TH functions are generated into at::legacy::cpu and at::legacy::cuda,
# where they can be called directly by a native function, they can be wrapped
# by a native function that handles dispatch
# Handle broadcasting for TH functions that need it
LEGACY_TH_DECLARATION_BROADCAST = CodeTemplate("""\
${return_type} ${api_name}(${type_method_formals});
""")
LEGACY_TH_DEFINITION_BROADCAST = CodeTemplate("""\
${return_type} ${api_name}(${type_method_formals}) {
#ifdef BUILD_NAMEDTENSOR
${named_guard_declaration}
#endif
${device_guard_declaration}
Tensor ${broadcast_returns};
std::tie(${broadcast_returns}) = ${broadcast_function}(${broadcast_actuals}, "${api_name}");
return ${method_prefix_derived}${api_name}(${broadcast_modified_actuals});
}
""")
LEGACY_TH_DECLARATION = CodeTemplate("""\
${return_type} ${method_prefix_derived}${api_name}(${type_method_formals});
""")
LEGACY_TH_DEFINITION = CodeTemplate("""\
${return_type} ${method_prefix_derived}${api_name}(${type_method_formals}) {
#ifdef BUILD_NAMEDTENSOR
${named_guard_declaration}
#endif
${device_guard_declaration}
${type_definition_body}
}
""")
LEGACY_TH_DEFINITION_SWITCH_STATEMENT = CodeTemplate("""\
${dispatch_scalar_type_declaration}
switch (dispatch_scalar_type) {
${cases}
default:
AT_ERROR("${api_name} not supported on ${Type} for ", dispatch_scalar_type);
}
""")
LEGACY_TH_DEFINITION_CASE = CodeTemplate("""\
case ScalarType::${ScalarName}: {
${case_body}
break;
}
""")
# Native functions are generated and registered on the dispatcher. We register the
# function on Backend::Undefined if it does not have backend dependent dispatch.
# In this case, it will be called for all backends, but can be overwritten on a
# per backend basis.
NATIVE_DISPATCH_DECLARATION = CodeTemplate("""\
static ${return_type} ${api_name}(${type_method_formals});
""")
NATIVE_DISPATCH_DEFINITION_DEFAULT = CodeTemplate("""\
${return_type} TypeDefault::${api_name}(${type_method_formals}) {
#ifdef BUILD_NAMEDTENSOR
${named_guard_declaration}
#endif
${device_guard_declaration}
${return_call} at::native::${native_type_method_dispatch}(${native_actuals});
}
""")
NATIVE_DISPATCH_DEFINITION_BACKEND = CodeTemplate("""\
${return_type} ${Type}::${api_name}(${type_method_formals}) {
#ifdef BUILD_NAMEDTENSOR
${named_guard_declaration}
#endif
${device_guard_declaration}
${return_call} at::native::${native_type_method_dispatch}(${native_actuals});
}
""")
DEFAULT_FUNCTION_REGISTRATION = CodeTemplate("""\
.registerOp<${return_type} (${formals_types})>(Backend::Undefined, "${schema_string}", &TypeDefault::${api_name})
""")
BACKEND_FUNCTION_REGISTRATION = CodeTemplate("""\
.registerOp<${return_type} (${formals_types})>(Backend::${Backend}, "${schema_string}", &${Type}::${api_name})
""")
# Generate a file that lists all functions and their schema string. Used for XLA
REGISTRATION_DECLARATION = CodeTemplate("""\
${return_type} ${api_name}(${type_method_formals}); // ${schema_string}
""")
# Overrideable stubs to be used in user-extendable backends
NATIVE_DISPATCH_DEFINITION_EXTENSION_BACKEND = CodeTemplate("""\
${return_type} ${Type}::${api_name}(${type_method_formals}) {
return ${Type}Dispatch::get_function<${return_type} (*)(${formals_types})>("${schema}")(${native_actuals});
}
""")
# add non-virtual declaration to Tensor.h
TENSOR_METHOD_DECLARATION = CodeTemplate("""\
${return_type} ${api_name}(${method_formals_with_defaults})${const_mark};
""")
# add non-virtual declaration to Tensor.cpp
TENSOR_METHOD_DEFINITION = CodeTemplate("""\
inline ${return_type} Tensor::${api_name}(${method_formals})${const_mark} {
static auto table = globalATenDispatch().getOpTable("${schema_string}");
return table->getOp<${return_type} (${formals_types})>(tensorTypeIdToBackend(type_id()), is_variable())(${method_actuals});
}
""")
# add a method declaration in Functions.h
FUNCTION_DECLARATION = CodeTemplate("""\
static inline ${return_type} ${api_name}(${formals_with_defaults});
""")
# add a method declaration in Functions.h
DEPRECATED_FUNCTION_DECLARATION = CodeTemplate("""\
C10_DEPRECATED static inline ${return_type} ${api_name}(${formals_with_defaults});
""")
# add method definition in Functions.h
FUNCTION_DEFINITION = CodeTemplate("""\
static inline ${return_type} ${api_name}(${formals}) {
static auto table = globalATenDispatch().getOpTable("${schema_string}");
return table->getOp<${return_type} (${formals_types})>(${inferred_backend}, ${inferred_is_variable})(${native_actuals});
}
""")
# add a native declaration for a native function
NATIVE_DECLARATION = CodeTemplate("""\
CAFFE2_API ${return_type} ${native_type_method_dispatch}(${formals_with_defaults});
""")
# special method definition for factory functions in Functions.h that initializes backends
FACTORY_DEFINITION = CodeTemplate("""\
static inline ${return_type} ${api_name}(${formals}) {
globalLegacyTypeDispatch().initForBackend(${inferred_backend});
static auto table = globalATenDispatch().getOpTable("${schema_string}");
return table->getOp<${return_type} (${formals_types})>(${inferred_backend}, ${inferred_is_variable})(${native_actuals});
}
""")
ZERO_DIM_CHECK = CodeTemplate("""\
if (${check_name}.dim() == 0) {
return ${api_name}(${zero_dim_actuals});
}""")
ZERO_DIM_ONLY = CodeTemplate("""\
AT_ERROR("${api_name} only supports a 0-dimensional ${check_name} tensor, but got tensor "
"with ", ${check_name}.dim(), " dimension(s).");
""")
SPARSE_CHECK = CodeTemplate("""\
if(${check_name}.is_sparse()) {
return static_cast<const TypeExtendedInterface*>(this)->${api_name}(${sparse_actuals});
}""")
CONDITIONAL_INITIALIZER = CodeTemplate("""\
if (${name}.defined()) {
${initializer}
}""")
CALL_TEMPLATE = CodeTemplate("${cname}(${actuals})")
NAMEDTENSOR_CHECK = CodeTemplate("""\
#ifdef BUILD_NAMEDTENSOR
${code}
#endif""")
# scalar_name, c_type, accreal, is_floating_type
scalar_types = [
('Bool', 'bool', 'BoolAccrealNotDefined', False),
('Byte', 'uint8_t', 'Long', False),
('Char', 'int8_t', 'Long', False),
('Double', 'double', 'Double', True),
('Float', 'float', 'Double', True),
('Int', 'int', 'Long', False),
('Long', 'int64_t', 'Long', False),
('Short', 'int16_t', 'Long', False),
('Half', 'Half', 'Double', True),
]
class NYIError(Exception):
"""Indicates we don't support this declaration yet"""
__slots__ = ['reason']
def __init__(self, reason):
self.reason = reason
TYPE_FORMAL_GENERIC = {
'THTensor*': 'Tensor &',
'THByteTensor*': 'Tensor &',
'THIndexTensor*': 'Tensor &',
'THBoolTensor*': 'Tensor &',
'THIntegerTensor*': 'Tensor &',
'THDenseTensor*': 'Tensor &',
'THDenseIndexTensor*': 'Tensor &',
'THStorage*': 'Storage',
'THGenerator*': 'Generator *',
'IntArrayRefSize': 'IntArrayRef',
'accreal': 'Scalar',
'real': 'Scalar',
'long': 'int64_t',
}
DYNAMIC_TYPE = {
'THTensor*': 'Tensor',
'THByteTensor*': 'ByteTensor',
'THBoolTensor*': 'BoolTensor',
'THIndexTensor*': 'IndexTensor',
'THIntegerTensor*': 'IntegerTensor',
'THDenseTensor*': 'Tensor',
'THDenseIndexTensor*': 'IndexTensor',
'THStorage*': 'Storage',
'THGenerator*': 'Generator*',
'IntArrayRefSize': 'IntArrayRef',
'accreal': 'accreal',
'real': 'real',
'long': 'int64_t',
}
NATIVE_DYNAMIC_TYPE = {
'Tensor &': 'Tensor',
'const Tensor &': 'Tensor',
}
TYPE_RETURN = {
'THTensor*': 'Tensor',
'THIndexTensor*': 'Tensor',
'THByteTensor*': 'Tensor',
'THBoolTensor*': 'Tensor',
'THIntegerTensor*': 'Tensor',
'THDenseTensor*': 'Tensor',
'THDenseIndexTensor*': 'Tensor',
'real': 'Tensor',
'accreal': 'Tensor',
'long': 'int64_t',
}
CHECKED_CAST = {
'THTensor*':
CodeTemplate(
'checked_tensor_unwrap('
'${arg_name},"${arg_name}",${arg_pos}, ${null_okay}, '
'Backend::${Backend}, ScalarType::${ScalarName})'),
'THByteTensor*':
CodeTemplate(
'checked_tensor_unwrap('
'${arg_name},"${arg_name}",${arg_pos}, ${null_okay}, '
'Backend::${Backend}, ScalarType::Byte)'),
'THBoolTensor*':
CodeTemplate(
'checked_tensor_unwrap('
'${arg_name},"${arg_name}",${arg_pos}, ${null_okay}, '
'Backend::${Backend}, ScalarType::Bool)'),
'THIndexTensor*':
CodeTemplate(
'checked_tensor_unwrap('
'${arg_name},"${arg_name}",${arg_pos}, ${null_okay}, '
'Backend::${Backend}, ScalarType::Long)'),
'THIntegerTensor*':
CodeTemplate(
'checked_tensor_unwrap('
'${arg_name},"${arg_name}",${arg_pos}, ${null_okay}, '
'Backend::${Backend}, ScalarType::Int)'),
'THDenseTensor*':
CodeTemplate(
'checked_tensor_unwrap('
'${arg_name},"${arg_name}",${arg_pos}, ${null_okay}, '
'Backend::${DenseBackend}, ScalarType::${ScalarName})'),
'THDenseIndexTensor*':
CodeTemplate(
'checked_tensor_unwrap('
'${arg_name},"${arg_name}",${arg_pos}, ${null_okay}, '
'Backend::${DenseBackend}, ScalarType::Long)'),
'THStorage*':
CodeTemplate(
'checked_storage('
'${arg_name},"${arg_name}",${arg_pos}, '
# We're punning here (Backend and DeviceType constructors coincide)
# but DeviceType is the correct way to classify storages
'DeviceType::${Backend}, at::scalarTypeToTypeMeta(ScalarType::${ScalarName}))'),
# This is a cast done via direct-construction
'IntArrayRefStride': CodeTemplate('at::IntArrayRef ${result_name} = get_intlist_stride_th(${arg_name});'),
'real': CodeTemplate('${arg_name}.to${ScalarName}()'),
'accreal': CodeTemplate('${arg_name}.to${AccScalarName}()'),
'TensorList': CodeTemplate(
'checked_tensor_list_unwrap(${arg_name},"${arg_name}",${arg_pos}, '
'Backend::${Backend}, ScalarType::${ScalarName})'),
'IntArrayRef': CodeTemplate('check_intlist<${size}>(${arg_name}, "${arg_name}", ${arg_pos}${,default_init})')
}
CHECKED_USE = {
'THTensor*': '{}_',
'THIndexTensor*': '{}_',
'THByteTensor*': '{}_',
'THBoolTensor*': '{}_',
'THIntegerTensor*': '{}_',
'THDenseTensor*': '{}_',
'THDenseIndexTensor*': '{}_',
'THStorage*': '{}_.unsafeGetStorageImpl()',
'TensorList': "{0}_.data(), {0}_.size()",
}
CHECKED_USE_NULLABLE = CodeTemplate('${arg_name}_ ? ${usage} : NULL')
ALLOC_NOARGS_WRAP = {
'THTensor*': 'c10::make_intrusive<TensorImpl, UndefinedTensorImpl>'
'(c10::Storage(caffe2::TypeMeta::Make<${ScalarType}>(), 0, allocator(), true),'
'${Backend}TensorId()).release()',
'THByteTensor*': 'c10::make_intrusive<TensorImpl, UndefinedTensorImpl>'
'(c10::Storage(scalarTypeToTypeMeta(ScalarType::Byte), 0, allocator(), true),'
'${Backend}TensorId()).release()',
'THBoolTensor*': 'c10::make_intrusive<TensorImpl, UndefinedTensorImpl>'
'(c10::Storage(scalarTypeToTypeMeta(ScalarType::Bool), 0, allocator(), true),'
'${Backend}TensorId()).release()',
'THIndexTensor*': 'c10::make_intrusive<TensorImpl, UndefinedTensorImpl>'
'(c10::Storage(scalarTypeToTypeMeta(ScalarType::Long), 0, allocator(), true),'
'${Backend}TensorId()).release()',
'THIntegerTensor*': 'c10::make_intrusive<TensorImpl, UndefinedTensorImpl>'
'(c10::Storage(scalarTypeToTypeMeta(ScalarType::Int), 0, allocator(), true),'
'${Backend}TensorId()).release()',
}
ALLOC_WRAP = {
'THTensor*': '${arguments}',
'THByteTensor*': '${arguments}',
'THBoolTensor*': '${arguments}',
'THIndexTensor*': '${arguments}',
'THIntegerTensor*': '${arguments}',
'THDenseTensor*': '${arguments}',
'THDenseIndexTensor*': '${arguments}',
}
# Replacements for constants when calling into TH
CONSTANT_REPLACEMENTS = [
('AS_REAL', '${ScalarType}'),
('__last_dim', 'self.ndimension()-1'),
]
# Replacements for constants in header file function definitions
HEADER_CONSTANT_REPLACEMENTS = [
(r'AS_REAL\((.*)\)', r'\1'),
('__last_dim', '-1'),
]
class nested_dict(object):
def __init__(self, base, parent):
self.base, self.parent = base, parent
def __getitem__(self, x):
r = self.base.get(x)
if r is not None:
return r
return self.parent[x]
Environment = TypedDict('Environment', {
'state': str,
'ScalarType': str,
'ScalarName': str,
'THTensor': str,
'THType': str,
'Backend': str,
'DeviceType': str,
'AccScalarName': str,
})
TopEnvironment = TypedDict('TopEnvironment', {
'type_registrations': List[str],
'type_headers': List[str],
'function_registrations': List[str],
'type_method_declarations': List[str],
'type_method_definitions': List[str],
'tensor_method_declarations': List[str],
'tensor_method_definitions': List[str],
'function_declarations': List[str],
'function_definitions': List[str],
'type_ids': List[str],
'native_function_declarations': List[str],
'registration_declarations': List[str],
})
# A Declarations.cwrap formal argument
# type can contain THTensor* types
THFormal = TypedDict('THFormal', {
'name': str,
'type': str,
'dynamic_type': str,
'kwarg_only': bool,
'is_nullable': bool,
'default': str,
'default_init': str,
'output': bool,
'size': int,
'declared_type': str,
'ignore_check': bool,
'allocate': bool,
'mask': bool,
'if_true': bool,
'if_false': bool,
'wrap_dim': str,
# Broadcast is originally a str but gets unwrapped to a List or Dict in-place
'broadcast': Any,
'resize': str,
'cpu_zero': bool,
'zero': bool,
}, total=False)
# Generic ATen formal or native_functions.yaml formal argument.
# type can contain Tensor& reference types.
AtFormal = TypedDict('AtFormal', {
'name': str,
'type': str,
'dynamic_type': str,
'kwarg_only': bool,
'is_nullable': bool,
'default': str,
'default_init': str,
'output': bool,
'size': int,
}, total=False)
# Note [field_name versus name]
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# What is the difference between "field_name" and "name"?
#
# Return values of ATen operators always have a name: if it is not
# explicitly assigned a name inside native_functions.yaml like func:
# myop() -> (Tensor indices, Tensor value), then the codegen will
# automatically assign it a name like result0, or name might be
# specified inside Declarations.cwrap. We don't want these assigned
# names to become part of the public API when we return a namedtuple for
# any such multiple-return function.
#
# Thus field_name is like name, but it is defined only when there is a
# name specified in native_functions.yaml. If field_name is defined,
# then the codegen would generate code to return namedtuple. Otherwise,
# it would just return tuple.
ReturnType = TypedDict('ReturnType', {
'name': str,
# See Note [field_name versus name]
'field_name': str,
'type': str,
'dynamic_type': str,
}, total=False)
ReturnDecl = TypedDict('ReturnDecl', {
'kind': str,
'type': str,
'arguments': List[int],
}, total=False)
# Represents a buffer in nn.yaml
NNBuffer = TypedDict('NNBuffer', {
'name': str,
})
FunctionOption = TypedDict('FunctionOption', {
'actuals': List[str],
'api_name': str,
'arguments': List[THFormal],
'aten_custom_call': str,
'backend_types': Dict[str, List[str]],
'backends': List[str],
'broadcast_actuals': List[str],
'broadcast_function': str,
'broadcast_modified_actuals': List[str],
'broadcast_returns': List[str],
'buffers': List[NNBuffer],
# cimpls is really a List[FunctionOption]
'cimpls': List[Any],
'cname': str,
'condition': str,
'const_mark': str,
'device_guard': bool,
'device_guard_declaration': str,
'dispatch_scalar_type_declaration': str,
'with_gil': bool,
'cpu_half': bool,
'deprecated': bool,
'cpu_bool': bool,
'cuda_bool': bool,
# See Note [field_name versus name]
'field_name': str,
'formals_list': List[AtFormal],
'formals_with_defaults': List[str],
'formals': List[str],
'formals_types': List[str],
'inferred_backend': str,
'inferred_is_variable': str,
'inplace': bool,
'matches_jit_signature': bool,
# This controls whether or not we generate the interface in Type or
# TypeExtendedInterface
'extended_method': bool,
'method_actuals': List[str],
'method_formals_with_defaults': List[str],
'method_formals': List[str],
'method_prefix_derived': str,
'named_guard_declaration': str,
'mode': str,
'python_module': str,
'name': str,
'native_actuals': List[str],
'native_type_method_dispatch': str,
# options should be List[FunctionOption]
'options': Any,
'schema_string': str,
'requires_tensor': bool,
'return_call': str,
'return_type': str,
'return': ReturnDecl,
'returns': List[ReturnType],
'scalar_check': str,
# schema used for extension backend operator registration
'schema': str,
'sparse': bool,
'type_definition_body': List[str],
'type_method_actuals': List[str],
'type_method_definition_dispatch': str,
'type_method_formals': List[str],
'variants': str,
'when_spares_dispatch': str,
'when_sparse_dispatch': str,
'with_gil': bool,
'zero_dim_dispatch_when_scalar': str,
'zero_dim_tensor_only': bool,
})
OutputDeclaration = NamedTuple('OutputDeclaration', [
('name', str),
('matches_jit_signature', bool),
('schema_string', str),
('method_prefix_derived', str),
('arguments', List[AtFormal]),
('method_of', List[str]),
('mode', str),
('python_module', str),
('buffers', Optional[List[str]]),
('returns', List[ReturnType]),
('inplace', bool),
('is_factory_method', bool),
('abstract', bool),
('requires_tensor', bool),
('device_guard', bool),
('with_gil', bool),
('deprecated', bool),
])
FunctionCode = NamedTuple('FunctionCode', [
('definition', str),
('declaration', str),
])
def device_guard(option, dispatch_options, dispatch_tensor):
# For factory methods the `DeviceGuard` is already in the template.
if option.get('device_guard', True):
if dispatch_options:
return 'const DeviceGuard device_guard({}.device());'.format(dispatch_options['name'])
if dispatch_tensor:
return 'const OptionalDeviceGuard device_guard(device_of({}));'.format(dispatch_tensor)
return '// DeviceGuard omitted'
def named_guard(option, tensors, tensorlists):
if not option.get('named_guard', True) or (len(tensors) + len(tensorlists) == 0):
return ''
# Override: named_guard = True for _th_ functions. This is because:
# There is always some at:: function that calls the _th_ function.
if option['name'].startswith('_th_'):
return ''
named_conditions = []
for tensor in tensors:
named_conditions.append('{}.is_named()'.format(tensor))
for tensorlist in tensorlists:
named_conditions.append('at::has_names({})'.format(tensorlist))
return ("""\
if ({named_conditions}) {{
AT_ERROR("{op}: no named inference rule implemented.");
}}""".format(named_conditions=' || '.join(named_conditions), op=option['name']))
def dispatch_scalar_type(option, dispatch_options, dispatch_tensor):
if dispatch_options:
return 'auto dispatch_scalar_type = typeMetaToScalarType({}.dtype());'.format(dispatch_options['name'])
if dispatch_tensor:
return 'auto dispatch_scalar_type = infer_scalar_type({});'.format(dispatch_tensor)
return '// dispatch_scalar_type omitted'
def is_real_argument_to_wrapper(argument):
# type: (THFormal) -> bool
return not argument.get('output', False) and\
argument['type'] != 'CONSTANT' and\
argument['type'] != 'argument'
def is_mutable_formal_argument(argument, option):
# type: (THFormal, FunctionOption) -> bool
return argument.get('output') or option['inplace'] and argument['name'] == 'self'
def check_methods_do_not_start_with_underscore(name, is_method):
if name in {'_values', '_indices', '_nnz', '_dimI', '_dimV', '_coalesced_'}:
return
if is_method and name.startswith('_') and not name.startswith('__') and not name.startswith('_th_'):
message = "Function '{}' starts with a single underscore and is ".format(name)
message += "configured to have a method on Tensor. Functions that start with "
message += " a single underscore should only be functions in the at:: "
message += "namespace and not methods on Tensor!"
raise RuntimeError(message)
def to_return_type(arg, option):
# type: (THFormal, FunctionOption) -> ReturnType
t = arg['type']
rt = TYPE_RETURN.get(t, t)
if rt == 'Tensor' and not arg.get('allocate'):
rt = rt + ' &'
if not is_mutable_formal_argument(arg, option):
rt = 'const ' + rt
return {
'name': arg['name'],
'type': rt,
'dynamic_type': DYNAMIC_TYPE.get(arg['type'], arg['type']),
}
def create_generic(top_env, declarations):
# type: (TopEnvironment, List[FunctionOption]) -> List[OutputDeclaration]
# translates defaults from cwrap types to C++ values
def translate_default(argument, type_str, default):
# type: (THFormal, str, Any) -> Any
if default is None:
# cause the default constructor for the object to run
return '{}'
if 'if_true' in argument:
return argument['default'] == argument['if_true']
for pattern, replacement in HEADER_CONSTANT_REPLACEMENTS:
default = re.sub(pattern, replacement, str(default))
if type_str in {'Scalar', 'int64_t', 'double'}:
try:
return int(default)
except Exception:
try:
return float(default)
except Exception:
return default
elif type_str == 'bool':
assert default.lower() in ['true', 'false']
return default.lower() == 'true'
else:
return default
# change from THTensor* to Tensor & so we get how it will appear
# in the aten argument list...
def translate_formal(argument, option):
# type: (THFormal, FunctionOption) -> AtFormal
type_str = TYPE_FORMAL_GENERIC.get(argument['type'], argument['type'])
if type_str == 'Tensor &' and not is_mutable_formal_argument(argument, option):
type_str = 'const ' + type_str
translated = {
'name': argument['name'],
'type': type_str,
'dynamic_type': DYNAMIC_TYPE.get(argument['type'], argument['type']),
} # type: AtFormal
if 'kwarg_only' in argument:
translated['kwarg_only'] = argument['kwarg_only']
if 'default' in argument:
default = translate_default(argument, type_str, argument['default'])
translated['default'] = default
translated['default_init'] = argument.get('default_init', default)
if argument.get('output'):
translated['output'] = True
if argument.get('size'):
translated['size'] = argument['size']
if argument.get('is_nullable') is not None:
translated['is_nullable'] = argument['is_nullable']
return translated
def get_formals(option, include_constants=False):
# type: (FunctionOption, bool) -> List[AtFormal]
seen = set() # type: Set[str]
pos_args = [] # type: List[THFormal]
kwd_args = [] # type: List[THFormal]
def insert(argument):
# type: (THFormal) -> None
if argument['name'] not in seen:
seen.add(argument['name'])
if argument.get('kwarg_only', False):
kwd_args.append(argument)
else:
pos_args.append(argument)
def has_output_mask(argument):
# type: (THFormal) -> bool
return argument.get('allocate', False) and argument.get('mask', False)
for argument in option['arguments']:
if argument.get('output') and not argument.get('allocate', False):
insert(argument)
for argument in option['arguments']:
if include_constants and argument['type'] == 'CONSTANT':
insert(argument)
elif is_real_argument_to_wrapper(argument):
insert(argument)
if any(has_output_mask(arg) for arg in option['arguments']):
mask_size = sum(has_output_mask(arg) for arg in option['arguments'])
insert({
'name': 'output_mask',
# NB: Lack of space in comma works around parsing
# problem in gen_variable_type.py
'type': 'std::array<bool,{}>'.format(mask_size),
'default': '{{' + ', '.join(['true'] * mask_size) + '}}',
})
result = pos_args + kwd_args
return [translate_formal(argument, option) for argument in result]
def get_return_types(option):
# type: (FunctionOption) -> List[ReturnType]
ret = option['return']
if ret['kind'] == 'arguments':
argument_indices = ret['arguments']
if len(argument_indices) == 1:
the_arg = option['arguments'][argument_indices[0]]
return [to_return_type(the_arg, option)]
else:
return [to_return_type(option['arguments'][idx], option)
for idx in argument_indices]
elif ret['kind'] == 'type':
return [{
'type': TYPE_RETURN.get(ret['type'], ret['type']),
'dynamic_type': DYNAMIC_TYPE.get(ret['type'], ret['type']),
}]
else:
raise Exception("format_return_type")
def format_return_type(return_types):
# type: (List[ReturnType]) -> str
if len(return_types) == 1:
return return_types[0]['type']
return "std::tuple<{}>".format(','.join(r['type'] for r in return_types))
def is_any_tensor_type(formal):
return (formal['dynamic_type'] == 'Tensor' or formal['dynamic_type'] == 'ByteTensor'
or formal['dynamic_type'] == 'IndexTensor' or formal['dynamic_type'] == 'BoolTensor')
def find_tensors(formals):
# type: (List[AtFormal]) -> List[str]
return [formal['name'] for formal in formals if is_any_tensor_type(formal)]
def find_tensorlists(formals):
# type: (List[AtFormal]) -> List[str]
return [formal['name'] for formal in formals if formal['dynamic_type'] == 'TensorList']
def find_dispatch_tensor(formals):
# type: (List[AtFormal]) -> Optional[str]
# dispatch to self if it's a parameter
for formal in formals:
if formal['name'] == 'self' and is_any_tensor_type(formal) and not formal.get('is_nullable', False):
return formal['name']
# otherwise dispatch to the first Tensor or TensorList
for formal in formals:
if 'TensorList' == formal['dynamic_type'] or is_any_tensor_type(formal) and \
not formal.get('is_nullable', False):
return formal['name']
return None
def format_formal(f):
# type: (AtFormal) -> str
return '{} {}'.format(f['type'], f['name'])
def formal_with_default(f):
# type: (AtFormal) -> str
s = format_formal(f)
v = f.get('default')
if v is None:
return s
if isinstance(v, bool):
v = str(v).lower()
return '{}={}'.format(s, v)
def get_broadcast_argument(option):
# type: (FunctionOption) -> Optional[THFormal]
for argument in option['arguments']:
if argument.get('broadcast'):
return argument
return None
def get_broadcast_actuals(broadcast_arg, broadcast_inplace, broadcast_dims):
# type: (THFormal, bool, bool) -> List[str]
# Note: broadcast_dims can change type...
# return the actuals that will be passed to the broadcast function.
# 1) in the common case, this is the broadcasted argument (e.g. "self") followed by the tensors
# that it is broadcasted against (comma-separated) (e.g. "self, tensor1, tensor2").
# 2) in the broadcast_dims case, this is the broadcasted argument (e.g. "self") followed by the sizes
# it is broadcasted to (as an initializer list), so e.g. the specification
# "mat1.dim0,mat2.dim1" gets transformed to "self, {mat1.size(0),mat2.size(1)}"
if not broadcast_dims:
broadcast_actuals = [broadcast_arg['name']] + broadcast_arg['broadcast'].split()[0].split(",")
else:
broadcast_dims_spec = broadcast_arg['broadcast'].split()[1].split(':')[1].split(',')
# generate size call for each dimension
broadcast_dims = ([x.split('.')[0] + '.size(' + x.split('.')[1].replace('dim', '') + ')' # type: ignore
for x in broadcast_dims_spec])
broadcast_dims_init_list = '{' + ','.join(broadcast_dims) + '}' # type: ignore
broadcast_actuals = [broadcast_arg['name'], broadcast_dims_init_list]
return broadcast_actuals
def emit_nn_body(option):
# type: (FunctionOption) -> Union[str, List[str]]
# Concrete definition on Type.cpp for NN functions. Delegates to the
# xxx_forward variant variant after creating any necessary buffers.
actuals = option['actuals']
base_name = option['name'][:-1] if option['inplace'] else option['name']
fwd_name = option['api_name'].replace(base_name, base_name + '_forward')
if len(option['buffers']) == 0:
return 'return {}({});'.format(fwd_name, ', '.join(actuals))
body = [] # type: List[str]
if option['api_name'].endswith('_out'):
# _out variants must create buffers and insert them in the
# arguments list between output and input arguments
for buffer in option['buffers']:
body.append('Tensor {} = at::empty({{0}}, this->options());'.format(buffer['name']))
actuals = [arg['name'] for arg in option['arguments'] if arg.get('output')]
actuals += [buffer['name'] for buffer in option['buffers']]
actuals += [arg['name'] for arg in option['arguments'] if not arg.get('output')]
body.append('return std::get<0>({}({}));'.format(fwd_name, ', '.join(actuals)))
return body
def process_option(option):
# type: (FunctionOption) -> None
option['inplace'] = re.search(
'(^__i|[^_]_$)', option['api_name']) is not None
# print(yaml.dump(option))
formals = get_formals(option)
option['formals_list'] = formals
option['formals'] = [format_formal(f) for f in formals]
option['formals_with_defaults'] = [formal_with_default(f) for f in formals]
option['returns'] = get_return_types(option)
option['return_type'] = format_return_type(option['returns'])
option['return_call'] = 'return ' if option['return_type'] != 'void' else ''
option['actuals'] = [f['name'] for f in formals]
option['method_formals'] = [format_formal(f) for f in formals
if f['name'] != 'self']
option['method_formals_with_defaults'] = (
[formal_with_default(f) for f in formals if f['name'] != 'self'])
option['method_actuals'] = [
f['name'] if f['name'] != 'self' else '*this' for f in formals]
# There are no cases where these differ, but they do in native_functions
option['type_method_formals'] = option['formals']
option['type_method_actuals'] = option['actuals']
option['const_mark'] = '' if option['inplace'] else ' const'
assert 'method' not in option['variants'], 'TH functions cannot be methods'
is_function = 'function' in option['variants']
dispatch_tensor = find_dispatch_tensor(formals)
is_namespace_function = is_function and dispatch_tensor is not None
broadcast_arg = get_broadcast_argument(option)
# "s_" for "same size".
option['method_prefix_derived'] = '' if broadcast_arg is None else 's_'
if option['mode'] == 'TH':
option['device_guard'] = False
option['device_guard_declaration'] = device_guard(option, False, dispatch_tensor)
option['named_guard_declaration'] = named_guard(option, find_tensors(formals),
find_tensorlists(formals))
option['dispatch_scalar_type_declaration'] = dispatch_scalar_type(option, False, dispatch_tensor)
assert option['extended_method'], 'Expected legacy operator to be an extended method'
if broadcast_arg is not None:
broadcast_inplace = 'inplace' in broadcast_arg['broadcast']
broadcast_dims = 'dims:' in broadcast_arg['broadcast']
option['broadcast_actuals'] = get_broadcast_actuals(broadcast_arg, broadcast_inplace, broadcast_dims)
if not broadcast_dims:
option['broadcast_returns'] = (["b_" + x for x in option['broadcast_actuals']
if x != broadcast_arg['name'] or not broadcast_inplace])
else:
option['broadcast_returns'] = ["b_" + broadcast_arg['name']]
option['broadcast_function'] = 'expand_' + ('inplace' if broadcast_inplace
else 'size' if broadcast_dims else 'outplace')
option['broadcast_modified_actuals'] = ['b_' + y if 'b_' + y in option['broadcast_returns'] else y
for y in option['actuals']]
def native_get_formals(option, include_constants=False):
# type: (FunctionOption, bool) -> List[AtFormal]
seen = set() # type: Set[str]
pos_args = []
kwd_args = []
def insert(argument):
# type: (AtFormal) -> None
if argument['name'] not in seen:
seen.add(argument['name'])
if argument.get('kwarg_only', False):
kwd_args.append(argument)
else:
pos_args.append(argument)
for argument in option['arguments']:
insert(argument)
# not clear we need dynamic_type translation as we can specify the correct type
# directly in native functions
def add_dynamic_type(argument, option):
# type: (AtFormal, FunctionOption) -> AtFormal
argument['dynamic_type'] = NATIVE_DYNAMIC_TYPE.get(argument['type'], argument['type'])
return argument
result = pos_args + kwd_args
result = [add_dynamic_type(argument, option) for argument in result]
# ensure we get reference-type formals when appropriate
def native_translate_formals(argument, option):
# type: (AtFormal, FunctionOption) -> AtFormal
def translate_map(const):
# type: (bool) -> Dict[str, str]
return {
'Tensor': 'const Tensor &' if const else 'Tensor &',
'Type': 'const Type &' if const else 'Type &',
'TensorOptions': 'const TensorOptions &' if const else 'TensorOptions &',
'TensorList': 'TensorList',
}
if argument.get('is_nullable') and argument['type'] not in translate_map(False).keys():
argument['type'] = "c10::optional<{}>".format(argument['type'])
if (option['inplace'] and argument['name'] == 'self') or argument.get('output', False):
argument['type'] = translate_map(False).get(argument['type'], argument['type'])
else:
argument['type'] = translate_map(True).get(argument['type'], argument['type'])
return argument
result = [native_translate_formals(argument, option) for argument in result]
return result
# this can return multiple return types in a list, e.g. ['Tensor', 'Tensor']
def native_get_return_types(option):
# type: (FunctionOption) -> List[ReturnType]
ret = option['return']
return_types = [] # List[ReturnType]
for t_raw in ret:
# See Note [field_name versus name]
field_name = None
if isinstance(t_raw, string_type):
t = t_raw