HPC-Netlib

High Performance Math Software


V_SQRT

Abstract
Computing square-roots have a substantially high result latency on the Cray MPP. We have implemented an efficient software routine on Cray MPP to compute the square-roots of a double-precision real vector. This program written in CAM assembler language runs about seven times faster than the currently available library routine. The worst case deviation of the computed values using v_sqrt from those computed using the standard library routine is about one least significant bit.
DateOfInformation
Wed Apr 9 12:05:32 1997
Domain
Numerical Programs and Routines!Miscellaneous
Keyword
square root computation; numerical routine; architecture dependence
Name
V_SQRT
TargetEnvironment
Cray MPP, written in CAM assembler language
TitleLine
A Library Routine for Computing Square Roots of Double-Precision Vectors on CRAY
Webpage
http://sdcd.gsfc.nasa.gov/ESS/exchange/contrib/udaya/v_sqrt.html
ContactIs
Udaya A. Ranawake

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