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Date: Tue, 5 Jan 2016 12:55:21 -0900
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Subject: Re: [geda-user] Merging stuff. How to make it happen
From: "Britton Kerin (britton DOT kerin AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
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> Please, do no use long doubles for anything. While doubles are more or
> less standardized on IEEE-754 (or 854?) representation (there are
> variations wrt the bit-level representation of NaN and infinities),
> there are at least 4 different flavours of long doubles I know of:
>

float.h in theory characterizes how long doubles behave, though I agree
that we don't need them.

What would be at least theoretically beneficial would be a float type which
can count by ones up the largest integer coordinate you intend to support,
e.g. pow (FLT_RADIX, DBL_MANT_DIG) > COORD_MAX.  There are some more
details in another thread I just cc'd.

Britton

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<div dir=3D"ltr"><br><div class=3D"gmail_extra"><div class=3D"gmail_quote">=
<blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-=
left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;p=
adding-left:1ex">Please, do no use long doubles for anything. While doubles=
 are more or<br>
less standardized on IEEE-754 (or 854?) representation (there are<br>
variations wrt the bit-level representation of NaN and infinities),<br>
there are at least 4 different flavours of long doubles I know of:<br></blo=
ckquote><div><br></div><div style=3D"">float.h in theory characterizes how =
long doubles behave, though I agree that we don&#39;t need them.</div><div =
style=3D""><br></div><div style=3D"">What would be at least theoretically b=
eneficial would be a float type which can count by ones up the largest inte=
ger coordinate you intend to support, e.g.=C2=A0pow (FLT_RADIX, DBL_MANT_DI=
G) &gt; COORD_MAX.=C2=A0 There are some more details in another thread I ju=
st cc&#39;d.</div><div style=3D""><br></div><div style=3D"">Britton</div></=
div></div></div>

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