Re: [PATCH] Re: [rfa/amd64] Zero fill 32-bit registers

Mark Kettenis
2004-02-29T23:45:20Z

Date: Sun, 29 Feb 2004 18:11:42 -0500
From: Andrew Cagney <cagney@gnu.org>

> Date: Sat, 28 Feb 2004 15:39:47 -0500
> From: Andrew Cagney <cagney@gnu.org>
>
> > Could you live with just zero-extending the 16 general-purpose
> > registers and the instruction pointer? I'll implement it for you.
>
> It is certainly an improvement! Can you test it?
>
> I've tested the attached on SuSE 8.2, with -m32. No changes in the
> testoutput for me, but the threaded stuff doesn't work very well on
> the system (and probably no at all in on 32x64-bit). I committed it
> anyway, since I can't imagine this making things worse for the
> threaded stuff if it works for the non-threaded stuff. I'd appreciate
> it if you could test whether this fixed the problems you were seeing.

The segment registers have the same problem, is the attached ok? 6.1?
With it applied I get test results that approach i386.

2004-02-29 Andrew Cagney <cagney@redhat.com>

* amd64-nat.c (amd64_collect_native_gregset): Zero-extend the
32-bit segment registers.

OK. Feel free to add the segment registers to enum i386_regnum and
use <= I386_GS_REGNUM instead of < I386_ST0_REGNUM though.

Mark