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Re: Unifying the x86 FPU register sets

To: kettenis at wins dot uva dot nl
Subject: Re: Unifying the x86 FPU register sets
From: Eli Zaretskii <eliz at gnu dot org>
Date: Thu, 21 Oct 1999 07:43:54 -0400
CC: jtc at redback dot com, jimb at cygnus dot com, gdb at sourceware dot cygnus dot com
References: <199910151716.MAA03441@zwingli.cygnus.com> <5m7lkks1wi.fsf@jtc.redbacknetworks.com> <npvh84j7t2.fsf@zwingli.cygnus.com> <5mwvsjoyu0.fsf@jtc.redbacknetworks.com> <199910201347.JAA28369@mescaline.gnu.org> <npso36hqr3.fsf@zwingli.cygnus.com> <5miu414vn5.fsf@jtc.redbacknetworks.com> <199910210110.DAA25865@delius.kettenis.local>

> You'll also notice that all the other
> i386 ports (including Linux) have a 96-bit `long double'.  In other
> words `sizeof (long double)' is 12.

A `long double' on x86 is always 10 bytes; sizeof reports 12 because
of alignment considerations.  The extra 2 bytes are junk and will
never be used by any FP instruction.

Follow-Ups:
- Re: Unifying the x86 FPU register sets
  - From: Mark Kettenis

References:
- Unifying the x86 FPU register sets
  - From: Jim Blandy
- Re: Unifying the x86 FPU register sets
  - From: J.T. Conklin
- Re: Unifying the x86 FPU register sets
  - From: Jim Blandy
- Re: Unifying the x86 FPU register sets
  - From: J.T. Conklin
- Re: Unifying the x86 FPU register sets
  - From: Eli Zaretskii
- Re: Unifying the x86 FPU register sets
  - From: Jim Blandy
- Re: Unifying the x86 FPU register sets
  - From: J.T. Conklin
- Re: Unifying the x86 FPU register sets
  - From: Mark Kettenis

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