NPY_NO_EXPORT int
_IsAligned(PyArrayObject *ap)
{
unsigned int i;
npy_uintp aligned;
npy_uintp alignment = PyArray_DESCR(ap)->alignment;
/* alignment 1 types should have a efficient alignment for copy loops */
if (PyArray_ISFLEXIBLE(ap) || PyArray_ISSTRING(ap)) {
alignment = 16;
}
if (alignment == 1) {
return 1;
}
aligned = (npy_uintp)PyArray_DATA(ap);
for (i = 0; i < PyArray_NDIM(ap); i++) {
#if NPY_RELAXED_STRIDES_CHECKING
/* skip dim == 1 as it is not required to have stride 0 */
if (PyArray_DIM(ap, i) > 1) {
/* if shape[i] == 1, the stride is never used */
aligned |= (npy_uintp)PyArray_STRIDES(ap)[i];
}
else if (PyArray_DIM(ap, i) == 0) {
/* an array with zero elements is always aligned */
return 1;
}
#else /* not NPY_RELAXED_STRIDES_CHECKING */
aligned |= (npy_uintp)PyArray_STRIDES(ap)[i];
#endif /* not NPY_RELAXED_STRIDES_CHECKING */
}
return npy_is_aligned((void *)aligned, alignment);
}
NPY_NO_EXPORT int
_IsAligned(PyArrayObject *ap)
{
unsigned int i;
npy_uintp aligned;
npy_uintp alignment = PyArray_DESCR(ap)->alignment;
/* alignment 1 types should have a efficient alignment for copy loops */
if (PyArray_ISFLEXIBLE(ap) || PyArray_ISSTRING(ap)) {
npy_intp itemsize = PyArray_ITEMSIZE(ap);
/* power of two sizes may be loaded in larger moves */
if (((itemsize & (itemsize - 1)) == 0)) {
alignment = itemsize > NPY_MAX_COPY_ALIGNMENT ?
NPY_MAX_COPY_ALIGNMENT : itemsize;
}
else {
/* if not power of two it will be accessed bytewise */
alignment = 1;
}
}
if (alignment == 1) {
return 1;
}
aligned = (npy_uintp)PyArray_DATA(ap);
for (i = 0; i < PyArray_NDIM(ap); i++) {
#if NPY_RELAXED_STRIDES_CHECKING
/* skip dim == 1 as it is not required to have stride 0 */
if (PyArray_DIM(ap, i) > 1) {
/* if shape[i] == 1, the stride is never used */
aligned |= (npy_uintp)PyArray_STRIDES(ap)[i];
}
else if (PyArray_DIM(ap, i) == 0) {
/* an array with zero elements is always aligned */
return 1;
}
#else /* not NPY_RELAXED_STRIDES_CHECKING */
aligned |= (npy_uintp)PyArray_STRIDES(ap)[i];
#endif /* not NPY_RELAXED_STRIDES_CHECKING */
}
return npy_is_aligned((void *)aligned, alignment);
}