Editing AltiVec (section)

=== VMX128 ===
IBM enhanced VMX for use in [[Xenon (processor)|Xenon]] (Xbox 360) and called this enhancement VMX128. The enhancements comprise new routines targeted at gaming (accelerating 3D graphics and game physics)<ref>{{cite web
 |title=The Microsoft Xbox 360 CPU story 
 |publisher=IBM
 |url=http://www-128.ibm.com/developerworks/power/library/pa-fpfxbox/?ca=dgr-lnxw09XBoxDesign 
 |url-status=bot: unknown 
 |archive-url=https://web.archive.org/web/20080120000613/http://www-128.ibm.com/developerworks/power/library/pa-fpfxbox/?ca=dgr-lnxw09XBoxDesign 
 |archive-date=2008-01-20 
|date=October 2015
 }}</ref> and a total of 128 registers. VMX128 is not entirely compatible with VMX/Altivec, as a number of integer operations were removed to make space for the larger register file and additional application-specific operations.<ref>[https://web.archive.org/web/20120208052530/http://domino.research.ibm.com/comm/research.nsf/pages/r.arch.simd.html Using data-parallel SIMD architecture in video games and supercomputers] IBM Research</ref><ref>[https://patents.google.com/patent/US7421566  Implementing instruction set architectures with non-contiguous register file specifiers]  US Patent 7,421,566</ref>