[Bug libfortran/93592] New: Invalid UP/DOWN rounding with EN descriptor

[thenlich+gccbug at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93592

            Bug ID: 93592
           Summary: Invalid UP/DOWN rounding with EN descriptor
           Product: gcc
           Version: 9.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libfortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: thenlich+gccbug at gmail dot com
  Target Milestone: ---

When using the EN descriptor with d=0 (ENw.0) and rounding mode UP or DOWN the
result is totally wrong:

program test_en
  print "(RU,EN9.0)",  800.0_8 !   8.E+00 expected 800.E+00
  print "(RU,EN9.0)",  901.0_8 !  10.E+00 expected 901.E+00
  print "(RD,EN9.0)", -999.6_8 ! -10.E+00 expected  -1.E+03
end