[Bug target/35488] A incorrect result in a simple division, only in 32-bit gcc.

pinskia at gcc dot gnu dot org gcc-bugzilla@gcc.gnu.org
Thu Mar 6 23:16:00 GMT 2008



------- Comment #5 from pinskia at gcc dot gnu dot org  2008-03-06 23:15 -------
The division is done and then rounded to 80bits and then rounded again to
64bits.

This is not really a bug.  It is just a misunderstanding on how x87 FPU works.

        fldl    -24(%ebp)
        fldl    -32(%ebp)
        fdivrp  %st, %st(1)
        fstpl   -40(%ebp)

Either use -mfpmath=sse or don't use x86.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|DUPLICATE                   |INVALID


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35488



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