• d-bugmail puremagic.com (36/36) Oct 02 2013 http://d.puremagic.com/issues/show_bug.cgi?id=11159
• d-bugmail puremagic.com (7/7) Oct 02 2013 http://d.puremagic.com/issues/show_bug.cgi?id=11159
• d-bugmail puremagic.com (6/6) Oct 02 2013 http://d.puremagic.com/issues/show_bug.cgi?id=11159
• d-bugmail puremagic.com (10/10) Oct 03 2013 http://d.puremagic.com/issues/show_bug.cgi?id=11159
• d-bugmail puremagic.com (10/10) Oct 03 2013 http://d.puremagic.com/issues/show_bug.cgi?id=11159
• d-bugmail puremagic.com (10/10) Oct 04 2013 http://d.puremagic.com/issues/show_bug.cgi?id=11159

d-bugmail puremagic.com writes:

http://d.puremagic.com/issues/show_bug.cgi?id=11159

           Summary: [CTFE] Integer exponentiation give incorrect values
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Keywords: CTFE, patch
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: safety0ff.bugz gmail.com



Example program:

import std.stdio;
void main() {
    writeln("==== Runtime ====");
    ulong ten = 10, two = 2;
    writeln(two^^63);// ok
    writeln(two^^64);// overflows -> 2^64 % 2^64
    writeln(ten^^18);// ok
    writeln(ten^^19);// ok
    writeln(ten^^20);// overflows -> 10^20 % 2^64

    writeln("==== CTFE ====");
    enum ulong eten = 10, etwo = 2;
    writeln(etwo^^63);// ok
    writeln(etwo^^64);// expect an overflow, gives 2^63
    writeln(eten^^18);// ok
    writeln(eten^^19);// should work, gives 2^63 instead (2^63 > 10^19)
    writeln(eten^^20);// expect an overflow, gives 2^63
}

See attached patch for proposed fix.

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d-bugmail puremagic.com writes:

http://d.puremagic.com/issues/show_bug.cgi?id=11159




Created an attachment (id=1255)
Proposed fix

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d-bugmail puremagic.com writes:

http://d.puremagic.com/issues/show_bug.cgi?id=11159




Patch fixes issue 7548, one issue should be marked duplicate of the other.

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d-bugmail puremagic.com writes:

http://d.puremagic.com/issues/show_bug.cgi?id=11159


safety0ff.bugz gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |pull



https://github.com/D-Programming-Language/dmd/pull/2623

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d-bugmail puremagic.com writes:

http://d.puremagic.com/issues/show_bug.cgi?id=11159


Walter Bright <bugzilla digitalmars.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |kennytm gmail.com



22:57:15 PDT ---
*** Issue 7548 has been marked as a duplicate of this issue. ***

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d-bugmail puremagic.com writes:

http://d.puremagic.com/issues/show_bug.cgi?id=11159


Walter Bright <bugzilla digitalmars.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |bugzilla digitalmars.com
         Resolution|                            |FIXED


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