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

Software

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.

More about:

• MASS
• Intrinsic functions
• XL Fortran
• VS Fortran
• Fortran

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.

More about:

• ESSL
• Mathematical libraries

Performance

Machine architecture

Machine implementation

Compiler optimization

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