This patch refactors the sparc64 ifunc selector to a C implementation.
Also, the generic symbol is moved to its own implementation file
s_nearbyint{f}-generic.S).
Checked on sparc64-linux-gnu and sparcv9-linux-gnu.
* sysdeps/sparc/sparc64/fpu/multiarch/Makefile
(libm-sysdep_routines): Add s_nearbyint-generic and
s_nearbyintf-generic objects.
* sysdeps/sparc/sparc64/fpu/multiarch/s_nearbyint-generic.S: New file.
* sysdeps/sparc/sparc64/fpu/multiarch/s_nearbyint.c: Likewise.
* sysdeps/sparc/sparc64/fpu/multiarch/s_nearbyintf-generic.S: Likewise.
* sysdeps/sparc/sparc64/fpu/multiarch/s_nearbyintf.c: Likewise.
* sysdeps/sparc/sparc64/fpu/multiarch/s_nearbyint.S: Remove file.
* sysdeps/sparc/sparc64/fpu/multiarch/s_nearbyintf.S: Likewise.
Signed-off-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>