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POWER2 fixed-point, data cache, and storage control units

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2 Author(s)
Shippy, D.J. ; IBM Systems Technology & Architecture Division, 11400 Burnet Road, Austin, Texas 78758, USA ; Griffith, T.W.

The POWER2™ fixed-point, data cache, and storage control units provide a tightly integrated subunit for a second-generation high-performance superscalar RISC processor. These functional units provide dual fixed-point execution units and a large multiported data cache, as well as high-performance interfaces to memory, I/O, and the other execution units in the processor. These units provide the following features: dual fixed-point execution units, improved fixed-point/floating-point synchronization, new floating-point load and store quadword instructions, improved address translation, improved fixed-point multiply/divide, large multiported D-cache, increased bandwidth into and out of the caches through wider data buses, an improved external interrupt mechanism, and an improved I/O DMA mechanism to support multiple-streaming Micro Channels®.

Note: The Institute of Electrical and Electronics Engineers, Incorporated is distributing this Article with permission of the International Business Machines Corporation (IBM) who is the exclusive owner. The recipient of this Article may not assign, sublicense, lease, rent or otherwise transfer, reproduce, prepare derivative works, publicly display or perform, or distribute the Article.  

Published in:

IBM Journal of Research and Development  (Volume:38 ,  Issue: 5 )