Fix sinh missing underflows (bug 16519).

Similar to various other bugs in this area, some sinh implementations
do not raise the underflow exception for subnormal arguments, when the
result is tiny and inexact.  This patch forces the exception in a
similar way to previous fixes.

Tested for x86_64, x86, mips64 and powerpc.

	[BZ #16519]
	* sysdeps/ieee754/dbl-64/e_sinh.c: Include <float.h>.
	(__ieee754_sinh): Force underflow exception for arguments with
	small absolute value.
	* sysdeps/ieee754/flt-32/e_sinhf.c: Include <float.h>.
	(__ieee754_sinhf): Force underflow exception for arguments with
	small absolute value.
	* sysdeps/ieee754/ldbl-128/e_sinhl.c: Include <float.h>.
	(__ieee754_sinhl): Force underflow exception for arguments with
	small absolute value.
	* sysdeps/ieee754/ldbl-128ibm/e_sinhl.c: Include <float.h>.
	(__ieee754_sinhl): Force underflow exception for arguments with
	small absolute value.
	* sysdeps/ieee754/ldbl-96/e_sinhl.c: Include <float.h>.
	(__ieee754_sinhl): Force underflow exception for arguments with
	small absolute value.
	* math/auto-libm-test-in: Add more tests of sinh.
	* math/auto-libm-test-out: Regenerated.
	* sysdeps/i386/fpu/libm-test-ulps: Update.

1 files changed, 4 insertions, 0 deletions

diff --git a/math/auto-libm-test-in b/math/auto-libm-test-in
index c17f6f5046..cc9b7fd318 100644
--- a/math/auto-libm-test-in
+++ b/math/auto-libm-test-in
@@ -2528,6 +2528,10 @@ sinh 0x7.6e259d2436fc4p-4
 sinh 0x3.d6e088p-4
 sinh -0x7.688eap-4
 sinh -0xd.dce79p-4
+sinh min
+sinh -min
+sinh min_subnorm
+sinh -min_subnorm
 
 sqrt 0
 sqrt -0