There's an article over on
O'reilly network about the Power PC AltiVec technology.
"
Apple first introduced PowerMac G4 computer systems using AltiVec -- a high performance vector processing expansion to the PowerPC architecture -- in the fall of 1999. Architecturally, AltiVec adds 128-bit-wide vector execution units to the PowerPC architecture. Early versions of the G4 processor had a single AltiVec unit, while more recent versions have up to four units (simple, complex, floating, and permute). These vector units operate independently from the traditional integer and floating-point units. "
Click
here to read the entire article.
