The PowerPC Processor Element (PPE) supports not only basic load and store operations, but also load and store vector left- or right-indexed forms.
All Vector/SIMD Multimedia Extension load and store operations use the register + register indexed addressing mode, which forms the sum of the contents of an index GPR plus the contents of a base-address GPR. This addressing mode is very useful for accessing arrays.
In addition to the load and store operations, the Vector/SIMD Multimedia Extension instruction set provides a powerful set of element-manipulation instructions – for example, shuffle, permute (similar to the SPEs’ shuffle), rotate, and shift – to manipulate vector elements into the desired alignment and arrangement after the vectors have been loaded into vector registers.