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Re: [arm-gnu] how to add new instruction in gcc

From: Nick Clifton <nickc at redhat dot com>
To: Luca Piccarreta <piccarre at elet dot polimi dot it>
Cc: aram bharathi <aram_bharathi at rediffmail dot com>, gcc-help at gcc dot gnu dot org, crossgcc at sources dot redhat dot com, arm-gnu at codesourcery dot com, arm-gnu-help at codesourcery dot com
Date: Mon, 13 Dec 2004 12:57:26 +0000
Subject: Re: [arm-gnu] how to add new instruction in gcc
References: <20041213063718.26414.qmail@webmail18.rediffmail.com> <41BD7EE3.30407@redhat.com> <003001c4e10d$e27f6240$2a12af83@piccarreta>

Hi Luca,

Hi nick, hi all
I tried and build the ARM simulator, but I really was never
able to get it working for an arm-linux-pxa270-softfloat-gnu
platform (forgive the fantasy name).
Am I missing something?
I thought that the simulator was working just with not-so-modern
arm platforms and, most of all, not with OS (linux) support.

The ARM simulator used by GDB is not a platform simulator at all. It does not simulate any boards or test environments. It only simulates an ARM CPU. Hence it is not really possible to simulate an entire OS using it.

The simulator's purpose is to allow testing and debugging of ARM code generated by GCC and that is all. So it should be sufficient for you if you just want to test the generation of new instructions, but if you want to test these instructions in an simulated run-time environment then you are going to need another tool. You might like to look at the SID project:

http://sources.redhat.com/sid/

Alternatively there are commercial simulators that are out there as well.

Cheers
  Nick

References:
- Re: [arm-gnu] how to add new instruction in gcc
  - From: Nick Clifton
- Re: [arm-gnu] how to add new instruction in gcc
  - From: Luca Piccarreta

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