[Bug math/16519] New: Missing underflow exception from sinhf

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

https://sourceware.org/bugzilla/show_bug.cgi?id=16519

            Bug ID: 16519
           Summary: Missing underflow exception from sinhf
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: math
          Assignee: unassigned at sourceware dot org
          Reporter: zimmerma+gcc at loria dot fr

Created attachment 7383
  --> https://sourceware.org/bugzilla/attachment.cgi?id=7383&action=edit
test program

on x86_64 with the attached program I get:

GNU libc version: 2.18.90
GNU libc release: development
x=0x1.4p-146 (1.401298464e-44)
libc: sinhf(x)=0x1.4p-146 (1.401298464e-44) underflow=0
mpfr: sinhf(x)=0x1.4p-146 (1.401298464e-44)
ulp difference: 0.000000

The result 0x1.4p-146 is smaller than the smallest normal number, thus the
underflow exception should be raised.

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