Gather 64-bit integers from memory using 32-bit indices. 64-bit elements are loaded
from addresses starting at base_addr and offset by each 32-bit element in vindex
(each index is scaled by the factor in scale). Gathered elements are returned.
scale should be 1, 2, 4 or 8.
Gather 64-bit integers from memory using 32-bit indices. 64-bit elements are loaded from addresses starting at base_addr and offset by each 32-bit element in vindex (each index is scaled by the factor in scale). Gathered elements are returned. scale should be 1, 2, 4 or 8.