Bulletin number: 259
Products affected: D700E
Description: Ordering comparisons between INT64 values on T2 do not work 
Component: THE COMPILER UTILITY SET 
Date: Tue May 15 17:00:00 GMT 1990
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Because of a long-standing bug in the compiler library routine INT64GT 
in the T2 compiler library, which has been wrongly corrected in the D700E
version of the library, all ordering (non-equality) comparisons
between INT64 numbers which do not differ in the 16 most significant bits
are suspect. Any program requiring to perform such comparisons should
explicitly declare and use the following alternative corrected function:

BOOL FUNCTION i64gt (VAL INT64 U,V)
VAL[4]INT U RETYPES U:
 VAL[4]INT V RETYPES V:
 BOOL Result:
 VALOF
 IF
 U[3] = V[3]
 INT X, borrow:
 SEQ
 borrow, X := LONGDIFF (V[0], U[0], 0)
 borrow, X := LONGDIFF (V[1], U[1], borrow)
 borrow, X := LONGDIFF (V[2], U[2], borrow)
 Result := (borrow = 1)
 TRUE
 Result := (U[3] > V[3])
 RESULT Result
:



The following bugs mentioned in the TDS2 buglist (Rev 5) have been cured
(or are irrelevent) in TDS3: 2

These problem reports in this section
refer to the file handling utility set version 1.01
dated 23rd November
1989. Press CODE INFORMATION after loading the utility
set to see this date.