Hi Gabe,
the instruction at address 0x10b194 is movg, but it is using a FP state
register:
movg %fcc3, 0, %g1
I was taking a look at the decoder implementation, and it seems the
simulation stops when the following function is executed:
inline Movccfcc::Movccfcc(ExtMachInst machInst)
: Trap("movccfcc", machInst, IntAluOp)
{
_numSrcRegs = 0;
_numDestRegs = 0;
_numFPDestRegs = 0;
_numIntDestRegs = 0;;
}
I don't know much about the SPARC ISA, so any help would be appreciated.
I'm using the stable version of m5, and a SPARC_SE platform.
The MPGenc from ALPBench was cross-compiled with gcc-4.5.0, binutils-2.20.1
and glibc-2.3.6.
Thanks.
On Wed, May 12, 2010 at 4:04 AM, Gabe Black <[email protected]> wrote:
> Way back when I was first adding SPARC support, I had hoped to get
> around providing FP support by making our implementation pretend there
> was no FPU and to fault on the instructions that required it like the
> spec said I could. That didn't really work out, and most of the
> instructions that just faulted were replaced by functional equivalents.
> It seems your workload is trying to use one that was never properly
> implemented. If you can identify what instruction it is you could
> implement it yourself, or if you're not in a hurry you can give me a way
> to reproduce the problem and I can give it a shot. I can't make any
> strong guarantees about when I could take care of it though.
>
> Gabe
>
> Gustavo Henrique Nihei wrote:
> > Hi,
> >
> > This fatal error is happening during the simulation of a SPARC_SE
> > platform.
> >
> > M5 Simulator System
> >
> > Copyright (c) 2001-2008
> > The Regents of The University of Michigan
> > All Rights Reserved
> >
> >
> > M5 compiled May 5 2010 14:24:46
> > M5 revision 94c016415053+ 6283+ default tip
> > M5 started May 11 2010 15:11:44
> > M5 executing on nime-desktop
> > command line: ../../build/SPARC_SE/m5.fast run.py -n 4 -t
> > Global frequency set at 1000000000000 ticks per second
> > 0: system.remote_gdb.listener: listening for remote gdb on port 7002
> > 0: system.remote_gdb.listener: listening for remote gdb on port 7003
> > 0: system.remote_gdb.listener: listening for remote gdb on port 7000
> > 0: system.remote_gdb.listener: listening for remote gdb on port 7001
> > info: Entering event queue @ 0. Starting simulation...
> > fatal: fault (fp_disabled) detected @ PC 0x10b194
> > @ cycle 37023056000
> > [invoke:build/SPARC_SE/sim/faults.cc, line 43]
> > Memory Usage: 220052 KBytes
> > For more information see: http://www.m5sim.org/fatal/f78c96bc
> >
> > I'm trying to run the MPGenc software in the platform.
> > I suppose the fault "fp_disabled" is related to a floating point
> > operation, right?
> > Is there some kind of workaround for this problem?
> >
> > --
> > Gustavo Henrique Nihei
> > ------------------------------------------------------------------------
> >
> > _______________________________________________
> > m5-users mailing list
> > [email protected]
> > http://m5sim.org/cgi-bin/mailman/listinfo/m5-users
>
> _______________________________________________
> m5-users mailing list
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>
--
Gustavo Henrique Nihei
LAPS - Laboratório de Automação do Projeto de Sistemas
Universidade Federal de Santa Catarina
Florianópolis - Santa Catarina - Brasil
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