* delay slot and !pbb
@ 2001-05-06 10:28 Johan Rydberg
2001-05-06 10:38 ` Frank Ch. Eigler
0 siblings, 1 reply; 2+ messages in thread
From: Johan Rydberg @ 2001-05-06 10:28 UTC (permalink / raw)
To: cgen
Hi!
I need some suggestions. I'm working on my GNU Simulators port of
OpenRISC. I want the simulator to be as real as the real thing as
possible, so I decided to use a simple engine with scache and not
pbb.
Anyone got any suggestions how I should implement the delay slot
handling in the best way?
regards,
johan.
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: delay slot and !pbb
2001-05-06 10:28 delay slot and !pbb Johan Rydberg
@ 2001-05-06 10:38 ` Frank Ch. Eigler
0 siblings, 0 replies; 2+ messages in thread
From: Frank Ch. Eigler @ 2001-05-06 10:38 UTC (permalink / raw)
To: Johan Rydberg; +Cc: cgen
Hi -
: I need some suggestions. I'm working on my GNU Simulators port of
: OpenRISC.
Okay.
: I want the simulator to be as real as the real thing as
: possible, so I decided to use a simple engine with scache and not
: pbb.
The choice of instruction engine affects performance and complexity
of implementation, not fidelity.
: Anyone got any suggestions how I should implement the delay slot
: handling in the best way?
If you're planning to build a simulator for the gdb/sim collection,
see sim/fr30/mloop.in. If a sid-based simulator, methinks we haven't
released to the public any ports with delay slots, but the code
involved is straightforward, and we could provide relevant excerpts
for the sid/component/cgen-cpu/CPU/CPU.cxx:step_insns function.
- FChE
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2001-05-06 10:28 delay slot and !pbb Johan Rydberg
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