def ctypes_to_generic_value(cval, t):
if isinstance(t, core_types.FloatT):
llvm_t = llvm_types.llvm_value_type(t)
return GenericValue.real(llvm_t, cval.value)
elif isinstance(t, core_types.SignedT):
llvm_t = llvm_types.llvm_value_type(t)
return GenericValue.int_signed(llvm_t, cval.value)
elif isinstance(t, core_types.IntT):
llvm_t = llvm_types.llvm_value_type(t)
return GenericValue.int(llvm_t, cval.value)
elif isinstance(t, core_types.PtrT):
return GenericValue.pointer(ctypes.addressof(cval.contents))
else:
return GenericValue.pointer(ctypes.addressof(cval))
def python_to_generic_value(x, t):
if isinstance(t, core_types.FloatT):
llvm_t = llvm_types.llvm_value_type(t)
return GenericValue.real(llvm_t, x)
elif isinstance(t, core_types.SignedT):
llvm_t = llvm_types.llvm_value_type(t)
return GenericValue.int_signed(llvm_t, x)
elif isinstance(t, core_types.IntT):
llvm_t = llvm_types.llvm_value_type(t)
return GenericValue.int(llvm_t, x)
elif isinstance(t, core_types.PtrT):
return GenericValue.pointer(x)
else:
ctypes_obj = type_conv.from_python(x)
return GenericValue.pointer(ctypes.addressof(ctypes_obj))
def python_to_generic_value(x, t):
if isinstance(t, FloatT):
llvm_t = llvm_types.llvm_value_type(t)
return GenericValue.real(llvm_t, x)
elif isinstance(t, SignedT):
llvm_t = llvm_types.llvm_value_type(t)
return GenericValue.int_signed(llvm_t, x)
elif isinstance(t, IntT):
llvm_t = llvm_types.llvm_value_type(t)
return GenericValue.int(llvm_t, x)
elif isinstance(t, PtrT):
return GenericValue.pointer(x)
else:
ctypes_obj = type_conv.from_python(x)
return GenericValue.pointer(ctypes.addressof(ctypes_obj))
def parfor(fn, niters, fixed_args = (), ee = shared_exec_engine):
"""
Given a function from index integers to void, run it in parallel
over the index range specified by the tuple 'niters'
"""
assert isinstance(fn, Function), \
"Can only run LLVM functions, not %s" % type(fn)
# in case fixed arguments aren't yet GenericValues, convert them
fixed_args = tuple(gv_from_python(v, arg.type)
for (v,arg) in
zip(fixed_args, fn.args))
iter_ranges, steps, shape = parse_iters(niters)
result_lltype = return_type(fn)
if result_lltype == ty_void:
work_fn = parfor_wrapper(fn, steps)
launch(work_fn, iter_ranges, fixed_args, ee)
return
else:
assert is_llvm_float_type(result_lltype) or is_llvm_int_type(result_lltype)
dtype = lltype_to_dtype(result_lltype)
result_array = np.empty(shape = shape, dtype = dtype)
fixed_args = (GenericValue.pointer(result_array.ctypes.data),) + fixed_args
work_fn = parfor_wrapper(fn, steps, shape)
n_given = len(fixed_args) + 2*len(steps)
n_expected = len(work_fn.args)
assert n_given == n_expected, \
"Work function expects %d arguments but got %d" % (n_expected, n_given)
launch(work_fn, iter_ranges, fixed_args, ee)
return result_array
assert False, "Collecting results not yet implemented"
def gv_from_python(x, llvm_type = None):
if isinstance(x, GenericValue):
return x
elif isinstance(x, (int,long)):
llvm_type = ty_int64 if llvm_type is None else llvm_type
assert is_llvm_int_type(llvm_type), \
"Expected LLVM integer type, not %s" % (llvm_type,)
return GenericValue.int(llvm_type, x)
elif isinstance(x, float):
llvm_type = ty_float64 if llvm_type is None else llvm_type
assert is_llvm_float_type(llvm_type), \
"Expected LLVM float type, not %s" % (llvm_type,)
return GenericValue.real(llvm_type, x)
elif isinstance(x, bool):
llvm_type = ty_int8 if llvm_type is None else llvm_type
assert is_llvm_int_type(llvm_type), \
"Expected LLVM integer type, not %s" % (llvm_type,)
return GenericValue.int(llvm_type, x)
else:
assert isinstance(x, np.ndarray)
assert llvm_type is not None
assert is_llvm_ptr_type(llvm_type), \
"Native argument receiving numpy array must be a pointer, not %s" % (llvm_type,)
elt_type = llvm_type.pointee
assert is_llvm_float_type(elt_type) or is_llvm_int_type(elt_type)
assert elt_type == python_to_lltype(x.dtype), \
"Can't pass array with %s* data pointer to function that expects %s*" % (x.dtype, elt_type)
return GenericValue.pointer(x.ctypes.data)
def ctypes_to_generic_value(cval, t):
if isinstance(t, FloatT):
llvm_t = llvm_types.llvm_value_type(t)
return GenericValue.real(llvm_t, cval.value)
elif isinstance(t, SignedT):
llvm_t = llvm_types.llvm_value_type(t)
return GenericValue.int_signed(llvm_t, cval.value)
elif isinstance(t, IntT):
llvm_t = llvm_types.llvm_value_type(t)
return GenericValue.int(llvm_t, cval.value)
elif isinstance(t, NoneT):
return GenericValue.int(llvm_types.int64_t, 0)
elif isinstance(t, PtrT):
return GenericValue.pointer(ctypes.addressof(cval.contents))
else:
return GenericValue.pointer(ctypes.addressof(cval))
