Fix dbl-64 e_sqrt.c for non-default rounding modes (bug 16271).
Document some libm error handling intents.
Add powerpc-nofpu/e500 support functions for atomic compound assignment and FLT_ROUNDS.
Remove unused ldbl-96 functions (bug 15004).
Document libm accuracy goals.
[BZ #16214] S/390: Fix TLS GOT pointer setup.
Add 16214 to NEWS
Start generating libm tests automatically with MPFR.
Test sqrt in all rounding modes.
Fix x86 sqrt rounding (bug 14032).
Fix exp10 errno setting on underflow (bug 6787).