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Conference rusure::math

Title:Mathematics at DEC
Moderator:RUSURE::EDP
Created:Mon Feb 03 1986
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:2083
Total number of notes:14613

696.0. "Testing the VAX G-floating Sine and Cosine Implementaiton" by SEARAY::EAST () Mon May 04 1987 17:08

    We're porting the VAX math RTL to an alternative instruction set.
    I've been porting G-floating sine and cosine.  The problem is that
    we're unable to find two numbers that will test the Leading_ones
    and Leading_zeros code paths in the VAX MTH$GSINCOS\REDUCE_LARGE
    routine.
    
    This probably doesn't mean anything to people not already familiar
    with the VAX implementation of g-floating sine and cosine.  I believe
    I can explain further...but I'll wait a day or two to see if somebody
    has some numbers that they've used to test these.
    
    Thanks for your help,
    Jeff East
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696.1CLT::GILBERTeager like a childMon May 04 1987 22:263
    Good timing!  Just last week, I wrote software to find the 'closest'
    such numbers for H-floating.  Modifying the code for G-float is no
    problem.