[M3devel] LONGINT

Tony Hosking hosking at cs.purdue.edu
Thu Jul 19 16:34:22 CEST 2007

On Jul 19, 2007, at 9:13 AM, Rodney M. Bates wrote:

> I'll volunteer to do the update to the language definition, as that  
> is an
> interest of mine.

Great!  Let's try to flesh this out soon so I can try to get the  
compiler up to speed with what we spec out.

> Tony Hosking wrote:
>> I've successfully bootstrapped a CM3 compiler that supports  
>> LONGINT  as a 64-bit integer type (equivalent to "long long" in C)  
>> in addition  to INTEGER (same as "long" in C).  This will be  
>> useful for  simplifying interfaces to C library routines that  
>> expect to be able  to treat 64-bit integers such as "off_t" for  
>> lseek, etc.
>> Currently, the compiler does not treat LONGINT as an ordinal type   
>> (I'm not sure this would ever be a good idea) so it cannot be used  
>> to  index arrays, define enumerations etc., though the simple  
>> operations  ABS, MAX, MIN, addition, comparisons, MOD,  
>> multiplication,  subtraction, assignment, are all supported.  This  
>> includes changes to  m3core (with support for Long.T similar to  
>> Word.T, plus RTTipe and  RTTypeMap, etc.) and libm3 for Pickle2,  
>> as well as to m3middle,  m3front, and the gcc-based compiler  
>> backend.  There is still work  that needs to be done to support  
>> and test all the other M3 tools such  as network objects, etc.,  
>> with support and testing needed in m3tk for  the new type, as well  
>> as in other tools like m3browser.
>> How best should I proceed to get this out to the community.  I am   
>> tempted to push it into the CVS head just so that it gets some   
>> testing, but perhaps that is premature. I can confirm a complete   
>> bootstrap via "do-cm3-std.sh" that appears to produce perfectly   
>> functional executables, including mentor, etc.
> -- 
> -------------------------------------------------------------
> Rodney M. Bates, retired assistant professor
> Dept. of Computer Science, Wichita State University
> Wichita, KS 67260-0083
> 316-978-3922
> rodney.bates at wichita.edu

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