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comments on latest draft William D Clinger (04 Jun 2017 05:35 UTC)
Re: comments on latest draft William D Clinger (05 Jun 2017 18:39 UTC)
Re: comments on latest draft William D Clinger (07 Jun 2017 03:50 UTC)
Re: comments on latest draft Bradley Lucier (07 Jun 2017 19:55 UTC)
Re: comments on latest draft William D Clinger (07 Jun 2017 23:25 UTC)
Re: comments on latest draft Bradley Lucier (08 Jun 2017 01:09 UTC)
Re: comments on latest draft William D Clinger (09 Jun 2017 15:19 UTC)
Re: comments on latest draft Bradley Lucier (09 Jun 2017 17:11 UTC)
Re: comments on latest draft Bradley Lucier (09 Jun 2017 17:18 UTC)

Re: comments on latest draft William D Clinger 07 Jun 2017 23:25 UTC

Bradley Lucier wrote:

> In a previous email to this list:
>
> http://srfi-email.schemers.org/srfi-144/msg/5816099
>
> I stated:
>
> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
> In reviewing my previous comments, I see I should say more about fl+*:
>
> The "fma" operation means "*fused* multiply-add", if it isn't fused it
> isn't fma.  If fl+* isn't fma, then  fl-fast-fl+* isn't FP_FAST_FMA.
> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
>
> The language "as if to infinite precision and rounded only once" is from
> the C99 standard (I believe).  I don't see any benefit to fma without
> the "fused" part of the operation, which requires precisely the "as if
> to infinite precision and rounded only once" part.

So be it.  I have made that change in the portable implementation,
which is now complete except for these procedures:

    flinteger-exponent (whose current spec doesn't make sense)
    flfirst-bessel
    flsecond-bessel
    flerf
    flerfc

I won't get around to implementing the Bessel and error functions
until next week.  In the mean time, anyone who wants to play around
with the sample implementation can do a

    git clone https://github.com/larcenists/larceny.git

and extract the following files

    lib/SRFI/srfi/144.sld
    lib/SRFI/srfi/144.body.sld
    lib/SRFI/srfi/144.special.sld

    test/R7RS/Lib/tests/scheme/flonum.sld
    test/R7RS/Lib/tests/scheme/run/flonum.sps

The test program uses Larceny's R7RS test infrastructure, which
is derived from Racket's R6RS tests and is known to work with Chibi,
Chicken, Foment, Gauche, Kawa, and Sagittarius; it will probably
work with Cyclone as well.  At present, however, the implementation
of SRFI 144 uses the (rnrs arithmetic fixnums) library; it shouldn't
be hard to change that to (srfi 151).

Will