IBM Systems Journal - 2002 Copyright

IBM Skip to main content
  Home     Products & services     Support & downloads     My account  

  Select a country  
Journals Home  
  Systems Journal  
    Current Issue  
    Recent Issues  
    Papers in Progress  
    Author's Guide  
Journal of Research
and Development
  Contact Us  
  Related links:  
     IBM Research  

IBM Journal of Research and Development  
Volume 25, Number 1, Page 51 (1986)
IBM 3090 System and the System/370 Vector ...
  Full article: arrowPDF   arrowCopyright info


The IBM System/370 vector architecture

by W. Buchholz
Discussed is the instruction-set architecture of the IBM System/370 vector facility, a compatible extension of the System/370 architecture. Both the base system, which is a general-purpose System/370 processor, and the optional vector facility employ a register type of organization. Data formats are the same, arithmetic operations produce exactly the same results, arithmetic exceptions are handled in the same way, and instructions are precisely interruptible for page faults and other causes in the same manner as those of the base system. This approach permits substantially increased performance on vectorizable programs with only a modest increase in hardware and software, while retaining the ability to run existing nonvector programs unchanged.
Related Subjects: Architecture