[M3devel] question re LONGINT

[Jay K]

 - That error is likely from the frontend and will likely occur for any target. Tony's reply implies this as well.
 
 - LONGINT is believed to fully work on NT386. But more testing is welcome.
 
 - (atomics ditto -- believed to work, testing welcome -- and we should probably use them some, e.g. in MUTEX initialization)
 
 - I would be curious to see if threadtest only fails on 64bit Windows. I haven't tried 32bit yet but I will soon.
   - I was thinking more about this WOW64 GetThreadContext problem and ways to mitigate it, other than cooperative suspend.
     I had already suggested and started to implement scanning the entire stack -- i.e. not depending on an ability to get ESP from a suspended thread.
     Like how FreeBSD and OpenBSD work, albeit it is a significant deoptimization.
     Regarding the rest of the context, perhaps it is a reasonable assumption for now to declare that it doesn't matter? e.g. to know/assume
     that m3back never leaves a value only in registers, that anything in a register will also be on the stack? And to disable optimization on the
     hypothetical MINGW platforms. ?
     But still to confirm if there are no problems on 32bit, and to mull over implementing cooperative suspend..in the little time available...
     (Oh, and also, I wonder if SuspendThread can suspend a thread while in the kernel, probably, and if GetThreadContext returns
     the kernel context in that case; should be easy to determine via some experimentation -- which would imply a problem on 32bit Windows also.)
 
 
 - Jay
 


From: hosking at cs.purdue.edu
Date: Mon, 14 Mar 2011 17:21:01 -0400
To: rcolebur at SCIRES.COM
CC: m3devel at elegosoft.com
Subject: Re: [M3devel] question re LONGINT


This is a known problem which I am still to fix.  I know what the issue is...
You can probably make do by reading counts[i] to a variable, incrementing, and assigning.




On Mar 14, 2011, at 5:14 PM, Coleburn, Randy wrote:



I was making some local mods to Mika’s threadtest program to help me debug things a bit more on Windows.
 
I am trying to do:
   INC(counts[i]);
Where counts is REF ARRAY OF LONGINT
 
The compiler is complaining:
"..\src\Main.m3", line 189: ** INTERNAL CG ERROR *** unable to find integer type?  type=Int.64  s/o/a=64/0/32
 
I’m not sure what the status of LONGINT is on Windows.  If it is not fully implemented, let me know and I’ll switch to REF ARRAY OF INTEGER, but I really need LONGINT.
 
Regards,
Randy Coleburn
 
 		 	   		  
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