def get_function_definition(self, codegen_state, codegen_result,
schedule_index, function_decl, function_body):
from loopy.kernel.data import TemporaryVariable
args = (["_lpy_cl_kernels", "queue"] + [
idi.name for idi in codegen_state.implemented_data_info
if not issubclass(idi.arg_class, TemporaryVariable)
] + ["wait_for=None", "allocator=None"])
from genpy import (For, Function, Suite, Return, Line, Statement as S)
return Function(
codegen_result.current_program(codegen_state).name,
args,
Suite([
Line(),
] + [
Line(),
function_body,
Line(),
] + ([
For(
"_tv",
"_global_temporaries",
# free global temporaries
S("_tv.release()"))
] if self._get_global_temporaries(codegen_state) else []) + [
Line(),
Return("_lpy_evt"),
]))
def get_kernel_call(self, codegen_state, name, gsize, lsize, extra_args):
ecm = self.get_expression_to_code_mapper(codegen_state)
if not gsize:
gsize = (1, )
if not lsize:
lsize = (1, )
all_args = codegen_state.implemented_data_info + extra_args
value_arg_code, arg_idx_to_cl_arg_idx, cl_arg_count = \
generate_value_arg_setup(
codegen_state.kernel,
[self.target.device],
all_args)
arry_arg_code = generate_array_arg_setup(codegen_state.kernel,
all_args,
arg_idx_to_cl_arg_idx)
from genpy import Suite, Assign, Assert, Line, Comment
from pymbolic.mapper.stringifier import PREC_NONE
import pyopencl.version as cl_ver
if cl_ver.VERSION < (2020, 2):
from warnings import warn
warn("Your kernel invocation will likely fail because your "
"version of PyOpenCL does not support allow_empty_ndrange. "
"Please upgrade to version 2020.2 or newer.")
# TODO: Generate finer-grained dependency structure
return Suite([
Comment("{{{ enqueue %s" % name),
Line(),
Assign("_lpy_knl", "_lpy_cl_kernels." + name),
Assert("_lpy_knl.num_args == %d" % cl_arg_count),
Line(),
value_arg_code,
arry_arg_code,
Assign(
"_lpy_evt",
"%(pyopencl_module_name)s.enqueue_nd_range_kernel("
"queue, _lpy_knl, "
"%(gsize)s, %(lsize)s, "
# using positional args because pybind is slow with kwargs
"None, " # offset
"wait_for, "
"True, " # g_times_l
"True, " # allow_empty_ndrange
")" %
dict(pyopencl_module_name=self.target.pyopencl_module_name,
gsize=ecm(gsize, prec=PREC_NONE, type_context="i"),
lsize=ecm(lsize, prec=PREC_NONE, type_context="i"))),
Assign("wait_for", "[_lpy_evt]"),
Line(),
Comment("}}}"),
Line(),
])
def generate_array_arg_setup(kernel, implemented_data_info, arg_idx_to_cl_arg_idx):
from loopy.kernel.array import ArrayBase
from genpy import Statement as S, Suite
result = []
gen = result.append
for arg_idx, arg in enumerate(implemented_data_info):
if not issubclass(arg.arg_class, ArrayBase):
continue
cl_arg_idx = arg_idx_to_cl_arg_idx[arg_idx]
gen(S("_lpy_knl.set_arg(%d, %s)" % (cl_arg_idx, arg.name)))
return Suite(result)
def get_kernel_call(self, codegen_state, name, gsize, lsize, extra_args):
ecm = self.get_expression_to_code_mapper(codegen_state)
if not gsize:
gsize = (1,)
if not lsize:
lsize = (1,)
all_args = codegen_state.implemented_data_info + extra_args
value_arg_code, arg_idx_to_cl_arg_idx, cl_arg_count = \
generate_value_arg_setup(
codegen_state.kernel,
[self.target.device],
all_args)
arry_arg_code = generate_array_arg_setup(
codegen_state.kernel,
all_args,
arg_idx_to_cl_arg_idx)
from genpy import Suite, Assign, Assert, Line, Comment
from pymbolic.mapper.stringifier import PREC_NONE
# TODO: Generate finer-grained dependency structure
return Suite([
Comment("{{{ enqueue %s" % name),
Line(),
Assign("_lpy_knl", "_lpy_cl_kernels."+name),
Assert("_lpy_knl.num_args == %d" % cl_arg_count),
Line(),
value_arg_code,
arry_arg_code,
Assign("_lpy_evt", "%(pyopencl_module_name)s.enqueue_nd_range_kernel("
"queue, _lpy_knl, "
"%(gsize)s, %(lsize)s, wait_for=wait_for, g_times_l=True)"
% dict(
pyopencl_module_name=self.target.pyopencl_module_name,
gsize=ecm(gsize, prec=PREC_NONE, type_context="i"),
lsize=ecm(lsize, prec=PREC_NONE, type_context="i"))),
Assign("wait_for", "[_lpy_evt]"),
Line(),
Comment("}}}"),
Line(),
])
def generate_array_arg_setup(kernel, implemented_data_info,
arg_idx_to_cl_arg_idx):
from loopy.kernel.array import ArrayBase
from genpy import Statement as S, Suite
result = []
gen = result.append
cl_indices_and_args = []
for arg_idx, arg in enumerate(implemented_data_info):
if issubclass(arg.arg_class, ArrayBase):
cl_indices_and_args.append(arg_idx_to_cl_arg_idx[arg_idx])
cl_indices_and_args.append(arg.name)
if cl_indices_and_args:
assert len(cl_indices_and_args) % 2 == 0
gen(
S(f"_lpy_knl._set_arg_multi("
f"({', '.join(str(i) for i in cl_indices_and_args)},)"
")"))
return Suite(result)
def get_function_definition(self, codegen_state, codegen_result,
schedule_index, function_decl, function_body):
from loopy.kernel.data import TemporaryVariable
args = (["_lpy_cl_kernels", "queue"] + [
idi.name for idi in codegen_state.implemented_data_info
if not issubclass(idi.arg_class, TemporaryVariable)
] + ["wait_for=None", "allocator=None"])
from genpy import (For, Function, Suite, Import, ImportAs, Return,
FromImport, If, Assign, Line, Statement as S)
return Function(
codegen_result.current_program(codegen_state).name,
args,
Suite([
FromImport("struct", ["pack as _lpy_pack"]),
ImportAs("pyopencl", "_lpy_cl"),
Import("pyopencl.tools"),
Line(),
If(
"allocator is None",
Assign("allocator",
"_lpy_cl_tools.DeferredAllocator(queue.context)")),
Line(),
] + [
Line(),
function_body,
Line(),
] + [
For(
"_tv",
"_global_temporaries",
# free global temporaries
S("_tv.release()"))
] + [
Line(),
Return("_lpy_evt"),
]))
def generate_value_arg_setup(kernel, devices, implemented_data_info):
options = kernel.options
import loopy as lp
from loopy.kernel.array import ArrayBase
# {{{ arg counting bug handling
# For example:
# https://github.com/pocl/pocl/issues/197
# (but Apple CPU has a similar bug)
work_around_arg_count_bug = False
warn_about_arg_count_bug = False
try:
from pyopencl.characterize import has_struct_arg_count_bug
except ImportError:
count_bug_per_dev = [False]*len(devices)
else:
count_bug_per_dev = [
has_struct_arg_count_bug(dev)
if dev is not None else False
for dev in devices]
if any(dev is None for dev in devices):
warn("{knl_name}: device not supplied to PyOpenCLTarget--"
"workarounds for broken OpenCL implementations "
"(such as those relating to complex numbers) "
"may not be enabled when needed"
.format(knl_name=kernel.name))
if any(count_bug_per_dev):
if all(count_bug_per_dev):
work_around_arg_count_bug = True
else:
warn_about_arg_count_bug = True
# }}}
cl_arg_idx = 0
arg_idx_to_cl_arg_idx = {}
fp_arg_count = 0
from genpy import (
Comment, Line, If, Raise, Assign, Statement as S, Suite)
result = []
gen = result.append
for arg_idx, idi in enumerate(implemented_data_info):
arg_idx_to_cl_arg_idx[arg_idx] = cl_arg_idx
if not issubclass(idi.arg_class, lp.ValueArg):
assert issubclass(idi.arg_class, ArrayBase)
# assume each of those generates exactly one...
cl_arg_idx += 1
continue
gen(Comment("{{{ process %s" % idi.name))
gen(Line())
if not options.skip_arg_checks:
gen(If("%s is None" % idi.name,
Raise('RuntimeError("input argument \'{name}\' '
'must be supplied")'.format(name=idi.name))))
if idi.dtype.is_integral():
gen(Comment("cast to Python int to avoid trouble "
"with struct packing or Boost.Python"))
if sys.version_info < (3,):
py_type = "long"
else:
py_type = "int"
gen(Assign(idi.name, "%s(%s)" % (py_type, idi.name)))
gen(Line())
if idi.dtype.is_composite():
gen(S("_lpy_knl.set_arg(%d, %s)" % (cl_arg_idx, idi.name)))
cl_arg_idx += 1
elif idi.dtype.is_complex():
assert isinstance(idi.dtype, NumpyType)
dtype = idi.dtype
if warn_about_arg_count_bug:
warn("{knl_name}: arguments include complex numbers, and "
"some (but not all) of the target devices mishandle "
"struct kernel arguments (hence the workaround is "
"disabled".format(
knl_name=kernel.name))
if dtype.numpy_dtype == np.complex64:
arg_char = "f"
elif dtype.numpy_dtype == np.complex128:
arg_char = "d"
else:
raise TypeError("unexpected complex type: %s" % dtype)
if (work_around_arg_count_bug
and dtype.numpy_dtype == np.complex128
and fp_arg_count + 2 <= 8):
gen(Assign(
"_lpy_buf",
"_lpy_pack('{arg_char}', {arg_var}.real)"
.format(arg_char=arg_char, arg_var=idi.name)))
gen(S(
"_lpy_knl.set_arg({cl_arg_idx}, _lpy_buf)"
.format(cl_arg_idx=cl_arg_idx)))
cl_arg_idx += 1
gen(Assign(
"_lpy_buf",
"_lpy_pack('{arg_char}', {arg_var}.imag)"
.format(arg_char=arg_char, arg_var=idi.name)))
gen(S(
"_lpy_knl.set_arg({cl_arg_idx}, _lpy_buf)"
.format(cl_arg_idx=cl_arg_idx)))
cl_arg_idx += 1
else:
gen(Assign(
"_lpy_buf",
"_lpy_pack('{arg_char}{arg_char}', "
"{arg_var}.real, {arg_var}.imag)"
.format(arg_char=arg_char, arg_var=idi.name)))
gen(S(
"_lpy_knl.set_arg({cl_arg_idx}, _lpy_buf)"
.format(cl_arg_idx=cl_arg_idx)))
cl_arg_idx += 1
fp_arg_count += 2
elif isinstance(idi.dtype, NumpyType):
if idi.dtype.dtype.kind == "f":
fp_arg_count += 1
gen(S(
"_lpy_knl.set_arg(%d, _lpy_pack('%s', %s))"
% (cl_arg_idx, idi.dtype.dtype.char, idi.name)))
cl_arg_idx += 1
else:
raise LoopyError("do not know how to pass argument of type '%s'"
% idi.dtype)
gen(Line())
gen(Comment("}}}"))
gen(Line())
return Suite(result), arg_idx_to_cl_arg_idx, cl_arg_idx
def generate_value_arg_setup(kernel, implemented_data_info):
options = kernel.options
import loopy as lp
from loopy.kernel.array import ArrayBase
cl_arg_idx = 0
arg_idx_to_cl_arg_idx = {}
fp_arg_count = 0
from genpy import If, Raise, Statement as S, Suite
result = []
gen = result.append
buf_indices_and_args = []
buf_pack_indices_and_args = []
from pyopencl.invoker import BUF_PACK_TYPECHARS
def add_buf_arg(arg_idx, typechar, expr_str):
if typechar in BUF_PACK_TYPECHARS:
buf_pack_indices_and_args.append(arg_idx)
buf_pack_indices_and_args.append(repr(typechar.encode()))
buf_pack_indices_and_args.append(expr_str)
else:
buf_indices_and_args.append(arg_idx)
buf_indices_and_args.append(f"pack('{typechar}', {expr_str})")
for arg_idx, idi in enumerate(implemented_data_info):
arg_idx_to_cl_arg_idx[arg_idx] = cl_arg_idx
if not issubclass(idi.arg_class, lp.ValueArg):
assert issubclass(idi.arg_class, ArrayBase)
# assume each of those generates exactly one...
cl_arg_idx += 1
continue
if not options.skip_arg_checks:
gen(
If(
"%s is None" % idi.name,
Raise('RuntimeError("input argument \'{name}\' '
'must be supplied")'.format(name=idi.name))))
if idi.dtype.is_composite():
buf_indices_and_args.append(cl_arg_idx)
buf_indices_and_args.append(f"{idi.name}")
cl_arg_idx += 1
elif idi.dtype.is_complex():
assert isinstance(idi.dtype, NumpyType)
dtype = idi.dtype
if dtype.numpy_dtype == np.complex64:
arg_char = "f"
elif dtype.numpy_dtype == np.complex128:
arg_char = "d"
else:
raise TypeError("unexpected complex type: %s" % dtype)
buf_indices_and_args.append(cl_arg_idx)
buf_indices_and_args.append(f"_lpy_pack('{arg_char}{arg_char}', "
f"{idi.name}.real, {idi.name}.imag)")
cl_arg_idx += 1
fp_arg_count += 2
elif isinstance(idi.dtype, NumpyType):
if idi.dtype.dtype.kind == "f":
fp_arg_count += 1
add_buf_arg(cl_arg_idx, idi.dtype.dtype.char, idi.name)
cl_arg_idx += 1
else:
raise LoopyError("do not know how to pass argument of type '%s'" %
idi.dtype)
for arg_kind, args_and_indices, entry_length in [
("_buf", buf_indices_and_args, 2),
("_buf_pack", buf_pack_indices_and_args, 3),
]:
assert len(args_and_indices) % entry_length == 0
if args_and_indices:
gen(
S(f"_lpy_knl._set_arg{arg_kind}_multi("
f"({', '.join(str(i) for i in args_and_indices)},), "
")"))
return Suite(result), arg_idx_to_cl_arg_idx, cl_arg_idx
def generate_value_arg_setup(kernel, devices, implemented_data_info):
options = kernel.options
import loopy as lp
from loopy.kernel.array import ArrayBase
# {{{ arg counting bug handling
# For example:
# https://github.com/pocl/pocl/issues/197
# (but Apple CPU has a similar bug)
work_around_arg_count_bug = False
warn_about_arg_count_bug = False
try:
from pyopencl.characterize import has_struct_arg_count_bug
except ImportError:
count_bug_per_dev = [False] * len(devices)
else:
count_bug_per_dev = [
has_struct_arg_count_bug(dev) if dev is not None else False
for dev in devices
]
if any(dev is None for dev in devices):
warn("{knl_name}: device not supplied to PyOpenCLTarget--"
"workarounds for broken OpenCL implementations "
"(such as those relating to complex numbers) "
"may not be enabled when needed. To avoid this, "
"pass target=lp.PyOpenCLTarget(dev) when creating "
"the kernel.".format(knl_name=kernel.name))
if any(count_bug_per_dev):
if all(count_bug_per_dev):
work_around_arg_count_bug = True
else:
warn_about_arg_count_bug = True
# }}}
cl_arg_idx = 0
arg_idx_to_cl_arg_idx = {}
fp_arg_count = 0
from genpy import If, Raise, Statement as S, Suite
result = []
gen = result.append
buf_indices_and_args = []
buf_pack_indices_and_args = []
from pyopencl.invoker import BUF_PACK_TYPECHARS
def add_buf_arg(arg_idx, typechar, expr_str):
if typechar in BUF_PACK_TYPECHARS:
buf_pack_indices_and_args.append(arg_idx)
buf_pack_indices_and_args.append(repr(typechar.encode()))
buf_pack_indices_and_args.append(expr_str)
else:
buf_indices_and_args.append(arg_idx)
buf_indices_and_args.append(f"pack('{typechar}', {expr_str})")
for arg_idx, idi in enumerate(implemented_data_info):
arg_idx_to_cl_arg_idx[arg_idx] = cl_arg_idx
if not issubclass(idi.arg_class, lp.ValueArg):
assert issubclass(idi.arg_class, ArrayBase)
# assume each of those generates exactly one...
cl_arg_idx += 1
continue
if not options.skip_arg_checks:
gen(
If(
"%s is None" % idi.name,
Raise('RuntimeError("input argument \'{name}\' '
'must be supplied")'.format(name=idi.name))))
if idi.dtype.is_composite():
buf_indices_and_args.append(cl_arg_idx)
buf_indices_and_args.append(f"{idi.name}")
cl_arg_idx += 1
elif idi.dtype.is_complex():
assert isinstance(idi.dtype, NumpyType)
dtype = idi.dtype
if warn_about_arg_count_bug:
warn("{knl_name}: arguments include complex numbers, and "
"some (but not all) of the target devices mishandle "
"struct kernel arguments (hence the workaround is "
"disabled".format(knl_name=kernel.name))
if dtype.numpy_dtype == np.complex64:
arg_char = "f"
elif dtype.numpy_dtype == np.complex128:
arg_char = "d"
else:
raise TypeError("unexpected complex type: %s" % dtype)
if (work_around_arg_count_bug
and dtype.numpy_dtype == np.complex128
and fp_arg_count + 2 <= 8):
add_buf_arg(cl_arg_idx, arg_char, f"{idi.name}.real")
cl_arg_idx += 1
add_buf_arg(cl_arg_idx, arg_char, f"{idi.name}.imag")
cl_arg_idx += 1
else:
buf_indices_and_args.append(cl_arg_idx)
buf_indices_and_args.append(
f"_lpy_pack('{arg_char}{arg_char}', "
f"{idi.name}.real, {idi.name}.imag)")
cl_arg_idx += 1
fp_arg_count += 2
elif isinstance(idi.dtype, NumpyType):
if idi.dtype.dtype.kind == "f":
fp_arg_count += 1
add_buf_arg(cl_arg_idx, idi.dtype.dtype.char, idi.name)
cl_arg_idx += 1
else:
raise LoopyError("do not know how to pass argument of type '%s'" %
idi.dtype)
for arg_kind, args_and_indices, entry_length in [
("_buf", buf_indices_and_args, 2),
("_buf_pack", buf_pack_indices_and_args, 3),
]:
assert len(args_and_indices) % entry_length == 0
if args_and_indices:
gen(
S(f"_lpy_knl._set_arg{arg_kind}_multi("
f"({', '.join(str(i) for i in args_and_indices)},), "
")"))
return Suite(result), arg_idx_to_cl_arg_idx, cl_arg_idx
