[Bug target/29337] New: -mfpmath=387 doesn't use fistp for double-to-integer conversion

[seongbae dot park at gmail dot com]

-mfpmath=387 used on x86_64 is supposed to force gcc to use 387 for floating
point{math. However, even with the option, gcc generates cvtts{s,d}2* instead
of fistp* for floating-point to integer conversion. 

This makes a difference if/when the extra precision of 387 makes difference to
the conversion - which -mfpmath=387 is supposed to prevent.


-- 
           Summary: -mfpmath=387 doesn't use fistp for double-to-integer
                    conversion
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: seongbae dot park at gmail dot com
  GCC host triplet: i686-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29337