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From: Keith Thompson <kst-u@mib.org>
Newsgroups: comp.lang.c
Subject: Re: struct padding question
Date: Thu, 23 Mar 2017 12:21:48 -0700
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supercat@casperkitty.com writes:
[...]
> If C had specified that all computations on double promote to "long double"
> [which might or might not be longer than double], all computations on float
> promote to "long float" [whose precision could be anywhere between
> that of "float" and "long double"], and all "normal" floating-point values
> passed to variadic functions either promote to the same implementation-
> defined type or to a type defined in the prototype, it would have been much
> easier to write floating-point math code that works cleanly and efficiently
> on many different implementations.

Are you aware of the types float_t and double_t, both defined in
<math.h>, and the macro FLT_EVAL_METHOD, defined in <float.h>?

-- 
Keith Thompson (The_Other_Keith) kst-u@mib.org  <http://www.ghoti.net/~kst>
Working, but not speaking, for JetHead Development, Inc.
"We must do something.  This is something.  Therefore, we must do this."
    -- Antony Jay and Jonathan Lynn, "Yes Minister"