[Bug target/29100] New: use of fmac causes excess precision problems

amylaar at gcc dot gnu dot org gcc-bugzilla@gcc.gnu.org
Fri Sep 15 16:04:00 GMT 2006


The use of fmac (-m2e, -m3e, m4-single-only) causes excess precision
problems, which show up when running paranoia:

-Multiplication appears to round correctly.
+* is neither chopped nor correctly rounded. 

-Checking for sticky bit.
-Sticky bit apparently used correctly.
+Sticky bit used incorrectly or not at all.
+FLAW: lack(s) of guard digits or failure(s) to correctly round or chop
+(noted above) count as one flaw in the final tally below.


-- 
           Summary: use of fmac causes excess precision problems
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: amylaar at gcc dot gnu dot org
GCC target triplet: sh-elf


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29100



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