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Re: insn semantics required?
- From: Jean-Marc Saffroy <jean-marc dot saffroy at joguin dot com>
- To: Nathan Froyd <froydnj at codesourcery dot com>
- Cc: cgen at sourceware dot org
- Date: Mon, 24 Jan 2011 15:59:21 +0100
- Subject: Re: insn semantics required?
- References: <20110124142354.GE6247@codesourcery.com>
Hi Nathan,
On 01/24/2011 03:23 PM, Nathan Froyd wrote:
> I've been looking through the documentation and couldn't determine
> conclusively whether defining the semantics of an insn is required. Is
> it?
The syntax requires that you define something, although I think "()"
will do if you don't built a simulator. Otherwise, as you noted, a
simple "(nop)" will definitely be sufficient.
> Auto-magically defining a simulator seems less useful in this day
> and age, but an auto-generated assembler and disassembler seems quite
> useful.
It really depends if you have a platform available for testing. A
simulator (auto-generated or not) is very convenient to run the gcc test
suite for regression testing.
Cheers,
JM