[Bug math/10709] New: sin() returns incorrect rounding

["zimmerma+gcc at loria dot fr" <sourceware-bugzilla at sourceware dot org>]

for the double precision number closest to 2.522464e-1, the glibc sin() function
returns 2.4957989804940914e-01 (when printed to 17 digits, which identifies
uniquely double-precision numbers), whereas the correct rounding to nearest is
2.4957989804940911e-01.

According to glibc/sysdeps/ieee754/dbl-64/s_sin.c, the result should be
always correctly rounded.

-- 
           Summary: sin() returns incorrect rounding
           Product: glibc
           Version: 2.10
            Status: NEW
          Severity: normal
          Priority: P2
         Component: math
        AssignedTo: aj at suse dot de
        ReportedBy: zimmerma+gcc at loria dot fr
                CC: glibc-bugs at sources dot redhat dot com
 GCC build triplet: x86_64-redhat-linux
  GCC host triplet: x86_64-redhat-linux
GCC target triplet: x86_64-redhat-linux


http://sourceware.org/bugzilla/show_bug.cgi?id=10709

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