Daniel Jacobowitz - Re: Torbjorn's ieeelib.c (original) (raw)

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• From: Daniel Jacobowitz
• To: Richard Henderson , Mark Mitchell , Anthony Green , gcc mailing list , "Joseph S. Myers"
• Date: Tue, 29 Nov 2005 16:12:04 -0500
• Subject: Re: Torbjorn's ieeelib.c
• References: <438BB76E.8070905@codesourcery.com> <1133296590.3187.9.camel@localhost.localdomain> <438CBD3C.8070901@codesourcery.com> <20051129210123.GA21961@redhat.com>

On Tue, Nov 29, 2005 at 01:01:23PM -0800, Richard Henderson wrote:

On Tue, Nov 29, 2005 at 12:42:36PM -0800, Mark Mitchell wrote:

RTH is listed as the author of a lot of those bits, so perhaps he knows more?

The glibc bits handle ieee quad format, whereas I don't believe that Torbajorn's does.

Right.

I don't recall if Torbajorn's code allows for emulation of all rounding modes or exception bits.

No, it doesn't. I was halfheartedly hoping that it did.

But I suspect that Torbajorn's code compiles down smaller, which is likely to be helpful to the folk that actually need it.

Before we actually do replace fp-bit, if this is the primary differentiator between the two, I'd like to see numbers. I'd rather have rounding/exception support available if the performance and size cost is acceptable.

-- Daniel Jacobowitz CodeSourcery, LLC

• References:
  • Torbjorn's ieeelib.c
    * From: Mark Mitchell
  • Re: Torbjorn's ieeelib.c
    * From: Anthony Green
  • Re: Torbjorn's ieeelib.c
    * From: Mark Mitchell
  • Re: Torbjorn's ieeelib.c
    * From: Richard Henderson