def copyto(dst, src, casting="same_kind", where=None):
"""Copies values from one array to another with broadcasting.
This function can be called for arrays on different devices. In this case,
casting, ``where``, and broadcasting is not supported, and an exception is
raised if these are used.
Args:
dst (cupy.ndarray): Target array.
src (cupy.ndarray): Source array.
casting (str): Casting rule. See :func:`numpy.can_cast` for detail.
where (cupy.ndarray of bool): If specified, this array acts as a mask,
and an element is copied only if the corresponding element of
``where`` is True.
.. seealso:: :func:`numpy.copyto`
"""
if not numpy.can_cast(src.dtype, dst.dtype, casting):
raise TypeError("Cannot cast %s to %s in %s casting mode" % (src.dtype, dst.dtype, casting))
if dst.size == 0:
return
if where is None:
if _can_memcpy(dst, src):
dst.data.copy_from(src.data, src.nbytes)
else:
core.elementwise_copy(src, dst)
else:
core.elementwise_copy_where(src, where, dst)
def copyto(dst, src, casting='same_kind', where=None):
"""Copies values from one array to another with broadcasting.
This function can be called for arrays on different devices. In this case,
casting, ``where``, and broadcasting is not supported, and an exception is
raised if these are used.
Args:
dst (cupy.ndarray): Target array.
src (cupy.ndarray): Source array.
casting (str): Casting rule. See :func:`numpy.can_cast` for detail.
where (cupy.ndarray of bool): If specified, this array acts as a mask,
and an element is copied only if the corresponding element of
``where`` is True.
.. seealso:: :func:`numpy.copyto`
"""
if not numpy.can_cast(src.dtype, dst.dtype, casting):
raise TypeError('Cannot cast %s to %s in %s casting mode' %
(src.dtype, dst.dtype, casting))
if dst.size == 0:
return
if where is None:
if _can_memcpy(dst, src):
dst.data.copy_from(src.data, src.nbytes)
else:
core.elementwise_copy(src, dst)
else:
core.elementwise_copy_where(src, where, dst)
def copyto(dst, src, casting='same_kind', where=None):
"""Copies values from one array to another with broadcasting.
This function can be called for arrays on different devices. In this case,
casting, ``where``, and broadcasting is not supported, and an exception is
raised if these are used.
Args:
dst (cupy.ndarray): Target array.
src (cupy.ndarray): Source array.
casting (str): Casting rule. See :func:`numpy.can_cast` for detail.
where (cupy.ndarray of bool): If specified, this array acts as a mask,
and an element is copied only if the corresponding element of
``where`` is True.
.. seealso:: :func:`numpy.copyto`
"""
src_type = type(src)
src_is_python_scalar = (src_type in six.integer_types
or src_type in (bool, float, complex)
or src_type is fusion._FusionVarScalar)
if src_is_python_scalar:
src_dtype = numpy.dtype(type(src))
can_cast = numpy.can_cast(src, dst.dtype, casting)
else:
src_dtype = src.dtype
can_cast = numpy.can_cast(src_dtype, dst.dtype, casting)
if not can_cast:
raise TypeError('Cannot cast %s to %s in %s casting mode' %
(src_dtype, dst.dtype, casting))
if fusion._is_fusing():
if where is None:
core.elementwise_copy(src, dst)
else:
fusion._call_ufunc(search._where_ufunc, where, src, dst, dst)
return
if dst.size == 0:
return
if src_is_python_scalar and where is None:
dst.fill(src)
return
if where is None:
if _can_memcpy(dst, src):
dst.data.copy_from(src.data, src.nbytes)
else:
device = dst.device
with device:
if src.device != device:
src = src.copy()
core.elementwise_copy(src, dst)
else:
core.elementwise_copy_where(src, where, dst)