[M3devel] link failure on NT386

[Tony Hosking]

The atomics are not necessarily functions.   They approximate real instructions generated inline.
Shall I just go ahead and add it?

Sent from my iPad

On 01/02/2011, at 2:12 AM, Jay K <jay.krell at cornell.edu> wrote:

> Interesting. Me playing honestly dumb: how do you decide among runtime hooks vs. "special" functions recognized by the backend?
> In either case, the best reason I think for an m3cg hook is that the calling convention is unusual.
> Why are the atomics in m3cg?
> I grant, a possible reason: in the atomics case, the transform from "regular function" to "special function" might be more significant.
> alloca is simpler just by virtue of it only taking one parameter.
> 
> Why aren't and/or/xor/add runtime hooks, or special functions?
> Or the set operations?
> 
> I'm very willing to accept the answer that I suspect is the truth: there isn't a cut and dry reason, and many approaches lead to almost identical results.
> 
> And that there may be a desire to in general avoid growing m3cg.
> esp. to speed up a case that is very slow for other reasons and that we'd like to speed up in a way that would remove the need for the m3cg hook.
> 
> I'm also wishy washy. I can see it is easy to implement easily any way.
> I'm just overly bothered when I see obvious easy to fix inefficiency, even it is just a micro-optimization.
> 
> 
> At some point, I realize, you can model just about everything as function calls, except, calling functions. :)
> 
> I think runtime hooks are somewhat preferred for stuff implemented in Modula-3.
> Since anything implemented in Modula-3 and exposed must be in some interface.
> However runtime hooks can be implemented in C as well.
> It depends somewhat if they are only called by generated code or also hand written Modula-3.
> You know, if it is just implemented in C, and only called from generated code, there isn't a strict interface/module system,
> there is just relying on m3front and m3core agreeing.
> 
> 
>  - Jay
> 
> 
> From: hosking at cs.purdue.edu
> Date: Mon, 31 Jan 2011 22:39:36 -0500
> To: jay.krell at cornell.edu
> CC: m3devel at elegosoft.com
> Subject: Re: [M3devel] link failure on NT386
> 
> Why can't we just have a run-time hook that resolves differently on different targets?
> Take a look at m3front/src/misc/Runtyme and m3core/src/runtime/RTHooks.
> 
> On Jan 31, 2011, at 7:53 PM, Jay K wrote:
> 
> Oops, I was just wondering to self if I had fixed that.
> I can get to it fairly soon.
> We "just" have to translate m3_alloca to _chkstk..and fiddle with the calling
> convention (which imho is a good reason to
> make it a separate m3cg call...)
> (The input parameter is in eax, and the output is in esp.)
> (Tony, you really don't want a separate m3cg call?)
>  
>  
>  - Jay
>  
> From: rcolebur at SCIRES.COM
> To: m3devel at elegosoft.com
> Date: Mon, 31 Jan 2011 19:48:21 -0500
> Subject: [M3devel] link failure on NT386
> 
> Jay:  I note the HEAD branch is still broken for builds on NT386 due to the linker problem with unresolved symbol we talked about earlier.
> Do you have a plan to fix?
> Anything I can do to help?
> --Randy Coleburn
> 
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