A software system for tracing numerical significance during computer program execution

Authors:
H. S. Bright;B. A. Colhoun;F. B. Mallory
Affiliations:
Computation Planning, Inc., Washington, D. C.;Computation Planning, Inc., Washington, D. C.;Computation Planning, Inc., Washington, D. C.
Venue:
AFIPS '71 (Spring) Proceedings of the May 18-20, 1971, spring joint computer conference
Year:
1971

Citing 2
Cited 1

Pitfalls in computation, or why a math book isn''t enough

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Rounding Errors in Algebraic Processes

Rounding Errors in Algebraic Processes

Microprogrammed significance arithmetic: a perspective and feasibility study

AFIPS '72 (Spring) Proceedings of the May 16-18, 1972, spring joint computer conference

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Abstract

This report will describe and discuss a presently-operational software system for tracing and displaying numerical accuracy in digital computer calculation. A FORTRAN program processed by the system is executed in an artificial arithmetic, in which every arithmetic step produces, in addition to the numerical result, an estimate of the number of significant digits in that result. Programs have been processed successfully with significance mode segments totalling as many as 1400 FORTRAN statements.