[M3devel] 64 bit fixes?

[Jay]

 I haven't tested this but it looks very suspicious.. 
 When targeting 64 bit targets, the compiler thinks [-1 .. 1] is empty.  When compiling things like "compare" functions. I didn't debug it but just looked at the code. 
  ===================================================================    RCS file: /usr/cvs/cm3/m3-sys/m3middle/src/TInt.i3,v    retrieving revision 1.4  diff -r1.4 TInt.i3   26c26  <   MOne = Int{NUMBER (IBytes), IBytes{16_ff,16_ff,..}};  ---  >   MOne = Int{NUMBER (IBytes), IBytes{16_ff,16_ff,16_ff,16_ff,16_ff,16_ff,16_ff,16_ff}};      another fix might be:     >   MOne = Int{1, IBytes{16_ff}};  
   IBytes used to be 16 bit integers but now is 8 bit integers. PM3 has:  
    Zero = Int { IChunks {16_0000, 16_0000, 16_0000, 16_0000}};    One  = Int { IChunks {16_0001, 16_0000, 16_0000, 16_0000}};    MOne = Int { IChunks {16_ffff, 16_ffff, 16_ffff, 16_ffff}};   
 which seems adequate for what is likely going on in these parts.   
 
 I believe ".." fills with zeros, not the previous value.  
  Also, is this objectionable?  
 RCS file: /usr/cvs/cm3/m3-libs/m3core/src/text/TextLiteral.i3,v    retrieving revision 1.2    diff -r1.2 TextLiteral.i3    15c15     <   MaxBytes = LAST (INTEGER) DIV BITSIZE (Byte) - 32;    ---    >   MaxBytes = 16_FFFFFCD; (* LAST (INTEGER) DIV BITSIZE (Byte) - 32; *)  
 Maybe. The 32 bit compiler doesn't like such large types (that follow from the use of this).
 Maybe preferable to allow 32 bit hosted compiler to allow 64 bit sized types?
 - Jay


From: jayk123 at hotmail.comTo: m3devel at elegosoft.comDate: Tue, 26 Feb 2008 18:53:58 +0000Subject: [M3devel] tangential 64 bit...


alpha/osf doesn't work because basictypes/ctypes has a problem with the 32bit or 64bit types.specifically "unsigned long" is "empty" for some reason and many errors cascade from that. if you change:  unsigned_int       = [16_0 .. 16_ffffffff];to  unsigned_int       = [16_0 .. 16_fffffffe]; you get:  ****** runtime error:***    An array subscript was out of range.***    file "../src/TWord.m3", line 199***Presumably fixing this first problem is the first step in any "real" 64 bit target (SPARC64, PPC64, AMD64, IA64), and the second problem should just be fixed as a matter of course. I know this is the least of anyone's concerns..  - Jay

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