[Bug math/19486] New: S390: Math tests fail with "Exception Inexact set".

["stli at linux dot vnet.ibm.com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=19486

            Bug ID: 19486
           Summary: S390: Math tests fail with "Exception Inexact set".
           Product: glibc
           Version: 2.22
            Status: NEW
          Severity: normal
          Priority: P2
         Component: math
          Assignee: unassigned at sourceware dot org
          Reporter: stli at linux dot vnet.ibm.com
  Target Milestone: ---

I get some math test-failures on s390 for float/double/ldouble for
various lrint/lround functions like:
lrint (0x1p64): Exception "Inexact" set
lrint (-0x1p64): Exception "Inexact" set
llrint (0x1p64): Exception "Inexact" set
llrint (-0x1p64): Exception "Inexact" set
lround (0x1p64): Exception "Inexact" set
lround (-0x1p64): Exception "Inexact" set 
llround (0x1p64): Exception "Inexact" set
llround (-0x1p64): Exception "Inexact" set 
...
These failures occur in downward, towardzero and upward rounding modes, too.

GCC emits "convert to fixed" instructions for casting floating point
values to integer values. These instructions raise invalid and inexact
exceptions if the floating point value exceeds the integer type ranges.

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