fpgetround/fpsetround do not work

[Nicolas Joly]

Hi,

I just had soe more time to look into the failures or regression test
for -current NetBSD/alpha i run from time to time on a PWS500au
machine (available at http://www.netbsd.org/~njoly/alpha-atf/).

Checking the lib/libc/ieeefp/t_round/fpround test show that
fpgetround/fpsetround do not work as expected, but FLT_ROUNDS do.

njoly@thanos [~]> /usr/tests/lib/libc/ieeefp/t_round fpround
*** Check failed: /local/src/NetBSD/src/tests/lib/libc/ieeefp/t_round.c:41: fpgetround() != FP_RN
*** Check failed: /local/src/NetBSD/src/tests/lib/libc/ieeefp/t_round.c:64: fpsetround(FP_RN) != FP_RN
*** Check failed: /local/src/NetBSD/src/tests/lib/libc/ieeefp/t_round.c:67: fpgetround() != FP_RN

Lokking into the respective code show that both functions
(lib/libc/arch/alpha/gen/{flt_rounds,fpgetround}.c) use the same
code except for trapb operands which where removed in 2001.

Adding back the trapb ops to fpgetround()/fpsetround() make it work as
expected.

njoly@thanos [~]> /usr/tests/lib/libc/ieeefp/t_round fpround
passed

Any reason to not commit the attached patch ?

Thanks.

--
Nicolas Joly

Projects and Developments in Bioinformatics
Institut Pasteur, Paris.