Is i686 the minimum required for HotSpot on x86?

[Dr Andrew John Hughes]

On 17:31 Tue 29 Mar     , Christian Thalinger wrote:
> On Mar 29, 2011, at 4:35 PM, Christian Thalinger wrote:
> > On Mar 29, 2011, at 4:26 PM, Dr Andrew John Hughes wrote:
> >> We've just had a bug report for IcedTea which suggests that
> >> HotSpot fails on any x86 platform below i686.
> >> 
> >> The report is:
> >> 
> >> http://icedtea.classpath.org/bugzilla/show_bug.cgi?id=682
> >> 
> >> and shows a failure caused by an attempt by the JIT to emit
> >> an instruction which isn't present on i586.
> >> 
> >> Does HotSpot require i686 as a minimum? Or is there something
> >> else at fault here?
> > 
> > There is a switch -XX:+Use486InstrsOnly but I have an open bug for that one:
> > 
> > 6808665: Use486InstrsOnly aborts 32-bit VM
> 
> Looking a little closer this could actually be my fault.  I added unguarded cmov instructions to C1 with:
> 
> 6919934: JSR 292 needs to support x86 C1
> 
> http://hg.openjdk.java.net/jdk7/hotspot-comp/hotspot/rev/3cf667df43ef
> 
> And that was delivered in HS18b01.  I will fix that.
> 
> -- Christian

Ah thanks for finding the issue!  I await the fix.
-- 
Andrew :)

Free Java Software Engineer
Red Hat, Inc. (http://www.redhat.com)

Support Free Java!
Contribute to GNU Classpath and IcedTea
http://www.gnu.org/software/classpath
http://icedtea.classpath.org
PGP Key: F5862A37 (https://keys.indymedia.org/)
Fingerprint = EA30 D855 D50F 90CD F54D  0698 0713 C3ED F586 2A37