Differences between PPE and SPE SIMD support

This section describes the architectural and language-extension differences between PPE and SPE SIMD support.

1. Architectural differences between PPE and SPE SIMD support
   The PPE processes SIMD operations in the VXU within its PPU. The operations are those of the Vector/SIMD Multimedia Extension instruction set.
2. Language-extension differences between PPE and SPE SIMD support
   The SPE's SPU instruction set is similar to that of the PPE's Vector/SIMD Multimedia Extension instruction set, in that both operate on 128-bit SIMD vectors.