IBM - Personal communication

This web page describes the IBM work of James B. Shearer.


Intrinsic functions

I have written intrinsic function Fortran library routines for the IBM mainframe and power architectures. My power architecture routines are in the MASS libraries available over the web from Austin. Some of the routines in the mainframe VS Fortran library are also mine.

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Mathematical library routines

I have written routines for the Engineering and Scientific Subroutine Library (ESSL) in the areas of sorting, searching and banded matrix factor and solve for the vector mainframe and power architectures.

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I am also interested in how one designs computer systems for maximal performance. Some of the topics involved are:


Machine architecture

Machine implementation

Compiler optimization

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