本文整理汇总了Python中numba.cgutils.pack_array函数的典型用法代码示例。如果您正苦于以下问题：Python pack_array函数的具体用法？Python pack_array怎么用？Python pack_array使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。
在下文中一共展示了pack_array函数的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: _shape_and_strides
def _shape_and_strides(self, context, builder):
# Set shape and strides for a 1D size 1 array
one = context.get_constant(types.intp, 1)
zero = context.get_constant(types.intp, 0)
shape = cgutils.pack_array(builder, [one])
strides = cgutils.pack_array(builder, [zero])
return shape, strides示例2: _make_array
def _make_array(context, builder, dataptr, dtype, shape, layout="C"):
ndim = len(shape)
# Create array object
aryty = types.Array(dtype=dtype, ndim=ndim, layout="C")
ary = context.make_array(aryty)(context, builder)
targetdata = _get_target_data(context)
lldtype = context.get_data_type(dtype)
itemsize = lldtype.get_abi_size(targetdata)
# Compute strides
rstrides = [itemsize]
for i, lastsize in enumerate(reversed(shape[1:])):
rstrides.append(lastsize * rstrides[-1])
strides = [s for s in reversed(rstrides)]
kshape = [context.get_constant(types.intp, s) for s in shape]
kstrides = [context.get_constant(types.intp, s) for s in strides]
context.populate_array(
ary,
data=builder.bitcast(dataptr, ary.data.type),
shape=cgutils.pack_array(builder, kshape),
strides=cgutils.pack_array(builder, kstrides),
itemsize=context.get_constant(types.intp, itemsize),
meminfo=None,
)
return ary._getvalue()示例3: getitem_arraynd_intp
def getitem_arraynd_intp(context, builder, sig, args):
aryty, idxty = sig.args
ary, idx = args
arystty = make_array(aryty)
adapted_ary = arystty(context, builder, ary)
ndim = aryty.ndim
if ndim == 1:
result = _getitem_array1d(context, builder, aryty, adapted_ary, idx,
wraparound=idxty.signed)
elif ndim > 1:
out_ary_ty = make_array(aryty.copy(ndim = ndim - 1))
out_ary = out_ary_ty(context, builder)
in_shapes = cgutils.unpack_tuple(builder, adapted_ary.shape, count=ndim)
in_strides = cgutils.unpack_tuple(builder, adapted_ary.strides,
count=ndim)
data_p = cgutils.get_item_pointer2(builder, adapted_ary.data, in_shapes,
in_strides, aryty.layout, [idx],
wraparound=idxty.signed)
populate_array(out_ary,
data=data_p,
shape=cgutils.pack_array(builder, in_shapes[1:]),
strides=cgutils.pack_array(builder, in_strides[1:]),
itemsize=adapted_ary.itemsize,
parent=adapted_ary.parent,)
result = out_ary._getvalue()
else:
raise NotImplementedError("1D indexing into %dD array" % aryty.ndim)
return result示例4: get_array_at_offset
def get_array_at_offset(self, ind):
context = self.context
builder = self.builder
arytyp = types.Array(dtype=self.dtype, ndim=self.ndim, layout="A")
arycls = context.make_array(arytyp)
array = arycls(context, builder)
offseted_data = cgutils.pointer_add(self.builder,
self.data,
self.builder.mul(self.core_step,
ind))
if not self.as_scalar:
shape = cgutils.pack_array(builder, self.shape)
strides = cgutils.pack_array(builder, self.strides)
else:
one = context.get_constant(types.intp, 1)
zero = context.get_constant(types.intp, 0)
shape = cgutils.pack_array(builder, [one])
strides = cgutils.pack_array(builder, [zero])
itemsize = context.get_abi_sizeof(context.get_data_type(self.dtype))
context.populate_array(array,
data=builder.bitcast(offseted_data,
array.data.type),
shape=shape,
strides=strides,
itemsize=context.get_constant(types.intp,
itemsize),
meminfo=None)
return array._getvalue()示例5: __init__
def __init__(self, context, builder, args, dims, steps, i, step_offset,
typ, syms, sym_dim):
self.context = context
self.builder = builder
if isinstance(typ, types.Array):
self.dtype = typ.dtype
else:
self.dtype = typ
self.syms = syms
self.as_scalar = not syms
if self.as_scalar:
self.ndim = 1
else:
self.ndim = len(syms)
core_step_ptr = builder.gep(steps,
[context.get_constant(types.intp, i)],
name="core.step.ptr")
self.core_step = builder.load(core_step_ptr)
self.strides = []
for j in range(self.ndim):
step = builder.gep(steps, [context.get_constant(types.intp,
step_offset + j)],
name="step.ptr")
self.strides.append(builder.load(step))
self.shape = []
for s in syms:
self.shape.append(sym_dim[s])
data = builder.load(builder.gep(args,
[context.get_constant(types.intp,
i)],
name="data.ptr"),
name="data")
self.data = data
arytyp = types.Array(dtype=self.dtype, ndim=self.ndim, layout="A")
arycls = context.make_array(arytyp)
self.array = arycls(context, builder)
self.array.data = builder.bitcast(self.data, self.array.data.type)
if not self.as_scalar:
self.array.shape = cgutils.pack_array(builder, self.shape)
self.array.strides = cgutils.pack_array(builder, self.strides)
else:
one = context.get_constant(types.intp, 1)
zero = context.get_constant(types.intp, 0)
self.array.shape = cgutils.pack_array(builder, [one])
self.array.strides = cgutils.pack_array(builder, [zero])
self.array_value = self.array._getpointer()示例6: ptx_cmem_arylike
def ptx_cmem_arylike(context, builder, sig, args):
lmod = builder.module
[arr] = args
flat = arr.flatten(order='A')
aryty = sig.return_type
dtype = aryty.dtype
if isinstance(dtype, types.Complex):
elemtype = (types.float32
if dtype == types.complex64
else types.float64)
constvals = []
for i in range(flat.size):
elem = flat[i]
real = context.get_constant(elemtype, elem.real)
imag = context.get_constant(elemtype, elem.imag)
constvals.extend([real, imag])
elif dtype in types.number_domain:
constvals = [context.get_constant(dtype, flat[i])
for i in range(flat.size)]
else:
raise TypeError("unsupport type: %s" % dtype)
constary = lc.Constant.array(constvals[0].type, constvals)
addrspace = nvvm.ADDRSPACE_CONSTANT
gv = lmod.add_global_variable(constary.type, name="_cudapy_cmem",
addrspace=addrspace)
gv.linkage = lc.LINKAGE_INTERNAL
gv.global_constant = True
gv.initializer = constary
# Convert to generic address-space
conv = nvvmutils.insert_addrspace_conv(lmod, Type.int(8), addrspace)
addrspaceptr = gv.bitcast(Type.pointer(Type.int(8), addrspace))
genptr = builder.call(conv, [addrspaceptr])
# Create array object
ary = context.make_array(aryty)(context, builder)
kshape = [context.get_constant(types.intp, s) for s in arr.shape]
kstrides = [context.get_constant(types.intp, s) for s in arr.strides]
context.populate_array(ary,
data=builder.bitcast(genptr, ary.data.type),
shape=cgutils.pack_array(builder, kshape),
strides=cgutils.pack_array(builder, kstrides),
itemsize=ary.itemsize,
parent=ary.parent,
meminfo=None)
return ary._getvalue()示例7: getitem_array_tuple
def getitem_array_tuple(context, builder, sig, args):
aryty, idxty = sig.args
ary, idx = args
arystty = make_array(aryty)
ary = arystty(context, builder, ary)
ndim = aryty.ndim
if isinstance(sig.return_type, types.Array):
# Slicing
raw_indices = cgutils.unpack_tuple(builder, idx, aryty.ndim)
start = []
shapes = []
strides = []
oshapes = cgutils.unpack_tuple(builder, ary.shape, ndim)
for ax, (indexval, idxty) in enumerate(zip(raw_indices, idxty)):
if idxty == types.slice3_type:
slice = Slice(context, builder, value=indexval)
cgutils.normalize_slice(builder, slice, oshapes[ax])
start.append(slice.start)
shapes.append(cgutils.get_range_from_slice(builder, slice))
strides.append(cgutils.get_strides_from_slice(builder, ndim,
ary.strides,
slice, ax))
else:
ind = context.cast(builder, indexval, idxty, types.intp)
start.append(ind)
dataptr = cgutils.get_item_pointer(builder, aryty, ary, start,
wraparound=True)
# Build array
retstty = make_array(sig.return_type)
retary = retstty(context, builder)
populate_array(retary,
data=dataptr,
shape=cgutils.pack_array(builder, shapes),
strides=cgutils.pack_array(builder, strides),
itemsize=ary.itemsize,
meminfo=ary.meminfo,
parent=ary.parent)
return retary._getvalue()
else:
# Indexing
indices = cgutils.unpack_tuple(builder, idx, count=len(idxty))
indices = [context.cast(builder, i, t, types.intp)
for t, i in zip(idxty, indices)]
ptr = cgutils.get_item_pointer(builder, aryty, ary, indices,
wraparound=True)
return context.unpack_value(builder, aryty.dtype, ptr)示例8: iternext_specific
def iternext_specific(self, context, builder, arrty, arr, result):
zero = context.get_constant(types.intp, 0)
one = context.get_constant(types.intp, 1)
ndim = arrty.ndim
nitems = arr.nitems
index = builder.load(self.index)
is_valid = builder.icmp(lc.ICMP_SLT, index, nitems)
result.set_valid(is_valid)
with cgutils.if_likely(builder, is_valid):
ptr = builder.load(self.pointer)
value = context.unpack_value(builder, arrty.dtype, ptr)
if kind == 'flat':
result.yield_(value)
else:
# ndenumerate(): fetch and increment indices
indices = self.indices
idxvals = [builder.load(cgutils.gep(builder, indices, dim))
for dim in range(ndim)]
idxtuple = cgutils.pack_array(builder, idxvals)
result.yield_(
cgutils.make_anonymous_struct(builder, [idxtuple, value]))
_increment_indices_array(context, builder, arrty, arr, indices)
index = builder.add(index, one)
builder.store(index, self.index)
ptr = cgutils.pointer_add(builder, ptr, self.stride)
builder.store(ptr, self.pointer)示例9: to_native_tuple
def to_native_tuple(self, obj, typ):
"""
Convert tuple *obj* to a native array (if homogenous) or structure.
"""
n = len(typ)
values = []
cleanups = []
is_error = cgutils.false_bit
for i, eltype in enumerate(typ):
elem = self.tuple_getitem(obj, i)
native = self.to_native_value(elem, eltype)
values.append(native.value)
is_error = self.builder.or_(is_error, native.is_error)
if native.cleanup is not None:
cleanups.append(native.cleanup)
if cleanups:
def cleanup():
for func in reversed(cleanups):
func()
else:
cleanup = None
if isinstance(typ, types.UniTuple):
value = cgutils.pack_array(self.builder, values)
else:
value = cgutils.make_anonymous_struct(self.builder, values)
return NativeValue(value, is_error=is_error, cleanup=cleanup)示例10: _empty_nd_impl
def _empty_nd_impl(context, builder, arrtype, shapes):
"""Utility function used for allocating a new array during LLVM code
generation (lowering). Given a target context, builder, array
type, and a tuple or list of lowered dimension sizes, returns a
LLVM value pointing at a Numba runtime allocated array.
"""
arycls = make_array(arrtype)
ary = arycls(context, builder)
datatype = context.get_data_type(arrtype.dtype)
itemsize = context.get_constant(types.intp,
context.get_abi_sizeof(datatype))
# compute array length
arrlen = context.get_constant(types.intp, 1)
for s in shapes:
arrlen = builder.mul(arrlen, s)
if arrtype.layout == 'C':
strides = [itemsize]
for dimension_size in reversed(shapes[1:]):
strides.append(builder.mul(strides[-1], dimension_size))
strides = tuple(reversed(strides))
elif arrtype.layout == 'F':
strides = [itemsize]
for dimension_size in shapes[:-1]:
strides.append(builder.mul(strides[-1], dimension_size))
strides = tuple(strides)
else:
raise NotImplementedError(
"Don't know how to allocate array with layout '{0}'.".format(
arrtype.layout))
meminfo = context.nrt_meminfo_alloc(builder,
size=builder.mul(itemsize, arrlen))
data = context.nrt_meminfo_data(builder, meminfo)
populate_array(ary,
data=builder.bitcast(data, datatype.as_pointer()),
shape=cgutils.pack_array(builder, shapes),
strides=cgutils.pack_array(builder, strides),
itemsize=itemsize,
meminfo=meminfo)
return ary._getvalue()示例11: getitem_array_unituple
def getitem_array_unituple(context, builder, sig, args):
aryty, idxty = sig.args
ary, idx = args
ndim = aryty.ndim
arystty = make_array(aryty)
ary = arystty(context, builder, ary)
if idxty.dtype == types.slice3_type:
# Slicing
raw_slices = cgutils.unpack_tuple(builder, idx, aryty.ndim)
slices = [Slice(context, builder, value=sl) for sl in raw_slices]
for sl, sh in zip(slices,
cgutils.unpack_tuple(builder, ary.shape, ndim)):
cgutils.normalize_slice(builder, sl, sh)
indices = [sl.start for sl in slices]
dataptr = cgutils.get_item_pointer(builder, aryty, ary, indices,
wraparound=True)
# Build array
retstty = make_array(sig.return_type)
retary = retstty(context, builder)
shapes = [cgutils.get_range_from_slice(builder, sl)
for sl in slices]
strides = [cgutils.get_strides_from_slice(builder, ndim, ary.strides,
sl, i)
for i, sl in enumerate(slices)]
populate_array(retary,
data=dataptr,
shape=cgutils.pack_array(builder, shapes),
strides=cgutils.pack_array(builder, strides),
itemsize=ary.itemsize,
meminfo=ary.meminfo,
parent=ary.parent)
return retary._getvalue()
else:
# Indexing
assert isinstance(idxty.dtype, types.Integer)
indices = cgutils.unpack_tuple(builder, idx, count=len(idxty))
indices = [context.cast(builder, i, t, types.intp)
for t, i in zip(idxty, indices)]
ptr = cgutils.get_item_pointer(builder, aryty, ary, indices,
wraparound=idxty.dtype.signed)
return context.unpack_value(builder, aryty.dtype, ptr)示例12: lower_assign
def lower_assign(self, ty, inst):
value = inst.value
if isinstance(value, ir.Const):
if self.context.is_struct_type(ty):
const = self.context.get_constant_struct(self.builder, ty,
value.value)
elif ty == types.string:
const = self.context.get_constant_string(self.builder, ty,
value.value)
else:
const = self.context.get_constant(ty, value.value)
return const
elif isinstance(value, ir.Expr):
return self.lower_expr(ty, value)
elif isinstance(value, ir.Var):
val = self.loadvar(value.name)
oty = self.typeof(value.name)
return self.context.cast(self.builder, val, oty, ty)
elif isinstance(value, ir.Global):
if (isinstance(ty, types.Dummy) or
isinstance(ty, types.Module) or
isinstance(ty, types.Function) or
isinstance(ty, types.Dispatcher)):
return self.context.get_dummy_value()
elif ty == types.boolean:
return self.context.get_constant(ty, value.value)
elif isinstance(ty, types.Array):
return self.context.make_constant_array(self.builder, ty,
value.value)
elif self.context.is_struct_type(ty):
return self.context.get_constant_struct(self.builder, ty,
value.value)
elif ty in types.number_domain:
return self.context.get_constant(ty, value.value)
elif isinstance(ty, types.UniTuple):
consts = [self.context.get_constant(t, v)
for t, v in zip(ty, value.value)]
return cgutils.pack_array(self.builder, consts)
elif self.context.is_struct_type(ty):
return self.context.get_constant_struct(self.builder, ty,
value.value)
else:
raise NotImplementedError('global', ty)
else:
raise NotImplementedError(type(value), value)示例13: imp
def imp(context, builder, typ, val):
ary = aryty(context, builder)
dtype = elemty.dtype
newshape = [self.get_constant(types.intp, s) for s in
elemty.shape]
newstrides = [self.get_constant(types.intp, s) for s in
elemty.strides]
newdata = cgutils.get_record_member(builder, val, offset,
self.get_data_type(dtype))
arrayobj.populate_array(
ary,
data=newdata,
shape=cgutils.pack_array(builder, newshape),
strides=cgutils.pack_array(builder, newstrides),
itemsize=context.get_constant(types.intp, elemty.size),
parent=ary.parent
)
return ary._getvalue()示例14: ptx_gridsize2d
def ptx_gridsize2d(context, builder, sig, args):
assert len(args) == 1
ntidx = nvvmutils.call_sreg(builder, "ntid.x")
nctaidx = nvvmutils.call_sreg(builder, "nctaid.x")
ntidy = nvvmutils.call_sreg(builder, "ntid.y")
nctaidy = nvvmutils.call_sreg(builder, "nctaid.y")
r1 = builder.mul(ntidx, nctaidx)
r2 = builder.mul(ntidy, nctaidy)
return cgutils.pack_array(builder, [r1, r2])示例15: ptx_cmem_arylike
def ptx_cmem_arylike(context, builder, sig, args):
lmod = builder.module
[arr] = args
aryty = sig.return_type
constvals = [
context.get_constant(types.byte, i)
for i in six.iterbytes(arr.tobytes(order='A'))
]
constary = lc.Constant.array(Type.int(8), constvals)
addrspace = nvvm.ADDRSPACE_CONSTANT
gv = lmod.add_global_variable(constary.type, name="_cudapy_cmem",
addrspace=addrspace)
gv.linkage = lc.LINKAGE_INTERNAL
gv.global_constant = True
gv.initializer = constary
# Preserve the underlying alignment
lldtype = context.get_data_type(aryty.dtype)
align = context.get_abi_sizeof(lldtype)
gv.align = 2 ** (align - 1).bit_length()
# Convert to generic address-space
conv = nvvmutils.insert_addrspace_conv(lmod, Type.int(8), addrspace)
addrspaceptr = gv.bitcast(Type.pointer(Type.int(8), addrspace))
genptr = builder.call(conv, [addrspaceptr])
# Create array object
ary = context.make_array(aryty)(context, builder)
kshape = [context.get_constant(types.intp, s) for s in arr.shape]
kstrides = [context.get_constant(types.intp, s) for s in arr.strides]
context.populate_array(ary,
data=builder.bitcast(genptr, ary.data.type),
shape=cgutils.pack_array(builder, kshape),
strides=cgutils.pack_array(builder, kstrides),
itemsize=ary.itemsize,
parent=ary.parent,
meminfo=None)
return ary._getvalue()