Hi Wolfgang,

I used FC4 ppc binaries for some testing. xlibs, xterm and python where 
the first packages I did some tests with. It was just a try to see what 
happens.

FPU emulation was the first I needed (of course). Then I switched to the ELDK 
ppc_4xxFP root filesystem. This makes it even possible to use perl with math:

bash-3.00# perl -e 'print ("sin(pi/2)=",sin(3.14/2),"\n")'
sin(pi/2)=0.999999682931835
bash-3.00# perl -e 'print ("sqrt(3)=",sqrt(3),"\n")'
sqrt(3)=1.73205080756888
bash-3.00# cat /proc/cpuinfo
processor       : 0
cpu             : 405GPr
clock           : 399MHz
revision        : 9.81 (pvr 5091 0951)
bogomips        : 495.61
machine         : esd CPCI-405
plb bus clock   : 133MHz
pci bus clock   : 33MHz
bash-3.00#  

I would not recommend to use this for production. But its a good starting 
point before turning on the compiler :-)

Matthias

On Friday 24 November 2006 00:00, Wolfgang Denk wrote:

In message [ref] you 

wrote:

quoted

there's a quick'n'dirty way to get a perl running on your CPU.
Take the Fedora Core 4 ppc binary rpm (perl-5.8.6-15.ppc.rpm) and install 

it 

quoted

from an ELDK 4 root filesystem:

This will only work if you are running on a system where your CPU has
a full-blown CPU,  32  bytes  cache  line  size,  and  your  run-time
environment (all system libraries) are configured to use the FPU.

It will fail on  FPU-less  or  FPU-restricted  systems  like  MPC8xx,
PPC4xx, or MPC85xx.

quoted

Note: This test has been done on a PPC405. But do not forget to use a 

kernel 

quoted

with math emulation for this to work. 

I guess you didn't do much testing. You should try some  mathematics,
and  you  might  be surprised what happens when your Perl binary uses
the (emulated) FPU, while the system libraries use soft-float.

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de
It's all Klatchian to me.
        - Terry Pratchett & Stephen Briggs, _The Discworld Companion_

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