Re: [Qemu-devel] [PATCH] target-ppc: add Altivec instructions, patch-bomb version

[Nathan Froyd]

On Mon, Dec 15, 2008 at 07:40:59AM +0100, Aurelien Jarno wrote:
> And a question for the whole series: how have you tested those 
> instructions?

The instructions from the original (dyngen) patch were tested using a
modified version of:

 *  test-powerpc.cpp - PowerPC regression testing
 *
 *  Kheperix (C) 2003-2005 Gwenole Beauchesne

that didn't require poking around in the guts of QEMU.  I turned it into
a standalone application that could be run in Linux.  I then ran it on a
74xx machine and under usermode emulation with QEMU and compared the
results.

I assumed that porting it over would show no difference in
functionality, but I see from running it this morning that m{f,t}vscr,
vmul{e,o}*, and vs{l,r} are broken.  Everything else works OK.  I will
poke at the failing instructions and submit updated patches for them.

-Nathan