[LLVMbugs] [Bug 3397] Wide multiplications fail

bugzilla-daemon at cs.uiuc.edu bugzilla-daemon at cs.uiuc.edu
Sun Jan 25 01:43:20 PST 2009


Duncan Sands <baldrick at free.fr> changed:

           What    |Removed                     |Added
                 CC|                            |baldrick at free.fr
             Status|NEW                         |RESOLVED
         Resolution|                            |DUPLICATE

--- Comment #1 from Duncan Sands <baldrick at free.fr>  2009-01-25 03:43:19 ---
The i128 multiplication gets turned into a libcall
(a call into the gcc library).  This results in a
function call that returns i128.  That this does
not work on x86-32 is PR2660.  It most likely still
will not work once PR2660 is fixed, because the gcc
library for x86-32 does not currently support 128 bit
multiplications.  This is one of the limitations of
codegen of arbitrary precision integers: it relies
on external libraries which do not support arbitrarily
large sizes.

*** This bug has been marked as a duplicate of bug 2660 ***

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