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Dive into the research topics where Michael J. Mahon is active.

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Featured researches published by Michael J. Mahon.


ieee computer society international conference | 1992

Pathlength reduction features in the PA-RISC architecture

Ruby B. Lee; Michael J. Mahon; Dale C. Morris

A description is given of representative pathlength reduction features of PA-RISC (reduced instruction set computer) instructions in memory accessing, functional operations, and instruction sequencing. To illustrate the multi-op instructions in PA-RISC, comparison is made with the MIPS instruction set, rather than with some hypothetical single-op RISC instructions. It is noted that, while other RISC architectures strive to enable short cycle times and single cycle instruction execution, PA-RISC also supports pathlength reduction, without impacting either the cycle time or the CPI. Frequent operations are combined into a single multi-op instruction. Subword data are also operated on in parallel, making full use of the datapath width. Such instruction level parallelism gives PA-RISC some of the advantages of a very simple VLIW (very long instruction word) architecture (with short 32-b instructions), in addition to the inherent advantages of a streamlined RISC architecture.<<ETX>>


Archive | 1985

Privilege level checking instruction for implementing a secure hierarchical computer system

Michael J. Mahon; Allen J. Baum; William R. Bryg; Terrence C. Miller


Archive | 1994

Method and apparatus for embedding identification codes in printed documents

Michael J. Mahon; Jerome C. Huck; Dale C. Morris


Archive | 1989

Cache memory with variable fetch and replacement schemes

Allen J. Baum; William R. Bryg; Michael J. Mahon; Ruby B. Lee; Steve S. Muchnick


Archive | 1986

Direct input/output in a virtual memory system

Steven C Boettner; William R. Bryg; David V. James; Tso-Kai Liu; Michael J. Mahon; Terrence C. Miller; William S. Worley


Archive | 1985

Computer providing flexible processor extension, flexible instruction set extension, and implicit emulation for upward software compatibility

Ruby B. Lee; Michael J. Mahon


Archive | 1996

Expediting blending and interpolation via multiplication

Ruby B. Lee; Michael J. Mahon


Archive | 1990

Software method for implementing dismissible instructions on a computer

Daryl Odnert; Michael J. Mahon; Dale C. Morris; Jerome C. Huck; Ruby B. Lee; Stephen G. Burger; William R. Bryg; Vivek S. Pendharkar


Archive | 1989

Method in a computing system for performing a multiplication

Michael J. Mahon; Allen J. Baum


Archive | 1986

Instruction for implementing a secure computer system

Terrence C. Miller; Allen J. Baum; William R. Bryg; Michael J. Mahon

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