def generate_out_register(self,
sdfg: SDFG,
state: SDFGState,
edge: graph.MultiConnectorEdge[mm.Memlet],
code: CodeIOStream,
use_data_name: bool = False) -> bool:
"""
Responsible for generating temporary out registers in a Tasklet, given an outgoing edge.
Returns `True` if a writeback of this register is needed.
"""
if edge.src_conn is None:
return
dst_node = state.memlet_path(edge)[-1].dst
src_type = edge.src.out_connectors[edge.src_conn]
src_name = edge.src_conn
if use_data_name:
src_name = edge.data.data
if isinstance(dst_node, nodes.AccessNode) and isinstance(
dst_node.desc(sdfg), data.Stream):
# Streams don't need writeback and are treated differently
self.stream_associations[edge.src_conn] = (edge.data.data,
src_type.base_type)
return False
elif edge.data.wcr is not None:
# WCR is addressed within the unparser to capture conditionals
self.wcr_associations[edge.src_conn] = (dst_node, edge,
src_type.base_type)
return False
# Create temporary registers
ctype = None
if util.is_vector(src_type):
ctype = util.TYPE_TO_SVE[src_type.type]
elif util.is_scalar(src_type):
ctype = src_type.ctype
else:
raise util.NotSupportedError(
'Unsupported Code->Code edge (pointer)')
self.dispatcher.defined_vars.add(src_name, DefinedType.Scalar, ctype)
code.write(f'{ctype} {src_name};')
return True
def generate_writeback(self, sdfg: SDFG, state: SDFGState, map: nodes.Map,
edge: graph.MultiConnectorEdge[mm.Memlet], code: CodeIOStream):
"""
Responsible for generating code for a writeback in a Tasklet, given the outgoing edge.
This is mainly taking the temporary register and writing it back.
"""
if edge.src_conn is None:
return
dst_node = state.memlet_path(edge)[-1].dst
src_type = edge.src.out_connectors[edge.src_conn]
src_name = edge.src_conn
if isinstance(dst_node, nodes.Tasklet):
##################
# Code->Code edges
dst_type = edge.dst.in_connectors[edge.dst_conn]
if (util.is_vector(src_type) and util.is_vector(dst_type)) or (util.is_scalar(src_type)
and util.is_scalar(dst_type)):
# Simply write back to shared register
code.write(f'{edge.data.data} = {src_name};')
elif util.is_scalar(src_type) and util.is_vector(dst_type):
# Scalar broadcast to shared vector register
code.write(f'{edge.data.data} = svdup_{util.TYPE_TO_SVE_SUFFIX[dst_type.type]}({src_name});')
else:
raise util.NotSupportedError('Unsupported Code->Code edge')
elif isinstance(dst_node, nodes.AccessNode):
##################
# Write to AccessNode
desc = dst_node.desc(sdfg)
if isinstance(desc, data.Array):
##################
# Write into Array
if util.is_pointer(src_type):
raise util.NotSupportedError('Unsupported writeback')
elif util.is_vector(src_type):
##################
# Scatter vector store into array
stride = edge.data.get_stride(sdfg, map)
# long long fix
ptr_cast = ''
if src_type.type == np.int64:
ptr_cast = '(int64_t*) '
elif src_type.type == np.uint64:
ptr_cast = '(uint64_t*) '
store_args = '{}, {}'.format(
util.get_loop_predicate(sdfg, state, edge.src),
ptr_cast + cpp.cpp_ptr_expr(sdfg, edge.data, DefinedType.Pointer, codegen=self.frame),
)
if stride == 1:
code.write(f'svst1({store_args}, {src_name});')
else:
code.write(
f'svst1_scatter_index({store_args}, svindex_s{util.get_base_type(src_type).bytes * 8}(0, {sym2cpp(stride)}), {src_name});'
)
else:
##################
# Scalar write into array
code.write(f'{cpp.cpp_array_expr(sdfg, edge.data, codegen=self.frame)} = {src_name};')
elif isinstance(desc, data.Scalar):
##################
# Write into Scalar
if util.is_pointer(src_type):
raise util.NotSupportedError('Unsupported writeback')
elif util.is_vector(src_type):
if util.is_vector(desc.dtype):
##################
# Vector write into vector Scalar access node
code.write(f'{edge.data.data} = {src_name};')
else:
raise util.NotSupportedError('Unsupported writeback')
else:
if util.is_vector(desc.dtype):
##################
# Broadcast into scalar AccessNode
code.write(f'{edge.data.data} = svdup_{util.TYPE_TO_SVE_SUFFIX[src_type]}({src_name});')
else:
##################
# Scalar write into scalar AccessNode
code.write(f'{edge.data.data} = {src_name};')
else:
raise util.NotSupportedError('Only writeback to Tasklets and AccessNodes is supported')
def generate_read(self, sdfg: SDFG, state: SDFGState, map: nodes.Map, edge: graph.MultiConnectorEdge[mm.Memlet],
code: CodeIOStream):
"""
Responsible for generating code for reads into a Tasklet, given the ingoing edge.
"""
if edge.dst_conn is None:
return
src_node = state.memlet_path(edge)[0].src
dst_type = edge.dst.in_connectors[edge.dst_conn]
dst_name = edge.dst_conn
if isinstance(src_node, nodes.Tasklet):
##################
# Code->Code edges
src_type = edge.src.out_connectors[edge.src_conn]
if util.is_vector(src_type) and util.is_vector(dst_type):
# Directly read from shared vector register
code.write(f'{util.TYPE_TO_SVE[dst_type.type]} {dst_name} = {edge.data.data};')
elif util.is_scalar(src_type) and util.is_scalar(dst_type):
# Directly read from shared scalar register
code.write(f'{dst_type} {dst_name} = {edge.data.data};')
elif util.is_scalar(src_type) and util.is_vector(dst_type):
# Scalar broadcast from shared scalar register
code.write(
f'{util.TYPE_TO_SVE[dst_type.type]} {dst_name} = svdup_{util.TYPE_TO_SVE_SUFFIX[dst_type.type]}({edge.data.data});'
)
else:
raise util.NotSupportedError('Unsupported Code->Code edge')
elif isinstance(src_node, nodes.AccessNode):
##################
# Read from AccessNode
desc = src_node.desc(sdfg)
if isinstance(desc, data.Array):
# Copy from array
if util.is_pointer(dst_type):
##################
# Pointer reference
code.write(
f'{dst_type} {dst_name} = {cpp.cpp_ptr_expr(sdfg, edge.data, None, codegen=self.frame)};')
elif util.is_vector(dst_type):
##################
# Vector load
stride = edge.data.get_stride(sdfg, map)
# First part of the declaration is `type name`
load_lhs = '{} {}'.format(util.TYPE_TO_SVE[dst_type.type], dst_name)
# long long issue casting
ptr_cast = ''
if dst_type.type == np.int64:
ptr_cast = '(int64_t*) '
elif dst_type.type == np.uint64:
ptr_cast = '(uint64_t*) '
# Regular load and gather share the first arguments
load_args = '{}, {}'.format(
util.get_loop_predicate(sdfg, state, edge.dst),
ptr_cast + cpp.cpp_ptr_expr(sdfg, edge.data, DefinedType.Pointer, codegen=self.frame))
if stride == 1:
code.write('{} = svld1({});'.format(load_lhs, load_args))
else:
code.write('{} = svld1_gather_index({}, svindex_s{}(0, {}));'.format(
load_lhs, load_args,
util.get_base_type(dst_type).bytes * 8, sym2cpp(stride)))
else:
##################
# Scalar read from array
code.write(f'{dst_type} {dst_name} = {cpp.cpp_array_expr(sdfg, edge.data, codegen=self.frame)};')
elif isinstance(desc, data.Scalar):
# Refer to shared variable
src_type = desc.dtype
if util.is_vector(src_type) and util.is_vector(dst_type):
# Directly read from shared vector register
code.write(f'{util.TYPE_TO_SVE[dst_type.type]} {dst_name} = {edge.data.data};')
elif util.is_scalar(src_type) and util.is_scalar(dst_type):
# Directly read from shared scalar register
code.write(f'{dst_type} {dst_name} = {edge.data.data};')
elif util.is_scalar(src_type) and util.is_vector(dst_type):
# Scalar broadcast from shared scalar register
code.write(
f'{util.TYPE_TO_SVE[dst_type.type]} {dst_name} = svdup_{util.TYPE_TO_SVE_SUFFIX[dst_type.type]}({edge.data.data});'
)
else:
raise util.NotSupportedError('Unsupported Scalar->Code edge')
else:
raise util.NotSupportedError('Only copy from Tasklets and AccessNodes is supported')