Re: Is it done?

On Dec 31, 2007 9:54 PM, Kevin Reid <[email protected]> wrote:
> > (mismatch (file #P"/Users/erights/svn-other/e-on-cl/tests/
> > numbers.updoc")
> >           (source "def x := 2.0 ** -0.5")
> >           (expects ("value" "0.7071067811865476"))
> >           (instead ("value" "0.7071067811865475")) (opt-backtrace
> > nil))
>
> This is the floating-point problem I mentioned. I believe that
> 0.7071067811865475 is actually the correct answer; please verify this.

E-on-Java does give 0.7071067811865475. For this case, E-on-Java
simply delegates to Java's StrictMath.pow(), which is supposed to use
IEEE double precision with round-to-even. I'm not sure what else to do
to verify this.

Since this kind of thing may be sensitive to platform issues at
several levels of abstraction, for the record, my "rune --version"
prints

E version: 0.9.1c at /Users/erights/ehome/
on Java version: 1.5.0_07 at
/System/Library/Frameworks/JavaVM.framework/Versions/1.5.0/Home
on OS: Mac OS X version: 10.4.11 on i386 (mac/x86)
for erights in US



-- 
Text by me above is hereby placed in the public domain

    Cheers,
    --MarkM