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Re: [Gcl-devel] rtest8.mac test failure

From: Raymond Toy
Subject: Re: [Gcl-devel] rtest8.mac test failure
Date: Tue, 01 Jul 2014 09:06:07 -0700
User-agent: Gnus/5.101 (Gnus v5.10.10) XEmacs/21.5-b34 (linux)

>>>>> "Camm" == Camm Maguire <address@hidden> writes:

    Camm> Greetings!  When compiling some functions that were previously
    Camm> interpreted under gcl, I have one small test failure on 32bit intel
    Camm> only:

    Camm> ev (e7, alfa=2, vita=1); (of rtest8.mac)

    Camm> returns 

    Camm> [0.052961027786557, 4.8572257327350623E-17, 50, 0]

    Camm> insead of

    Camm> [0.052961027786557, 5.551115123125785E-17, 50, 0]

    Camm> This is solely due to the loss of one bit of precision in res24 of
    Camm> slatec::dqc25s when the optimized compile is done in 64 bits instead 
    Camm> the 80 that are specially available on the x87 fpu:


    Camm> I don't really think this is a GCL bug, yet I've constructed the 
    Camm> package build to fail on any test failure.  Is there a way I can set 
    Camm> floating point tolerance higher here to let this result through?

Thanks for the detailed report. I think this particular test will need
to be restructured a bit to use my_float_approx_equal (or equivalent)
to check that the first return value is close enough. Maybe also that
third return value is 50 and the fourth is 0.


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