Optimize fdim/fdimf on sparc.
* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/Makefile: Add vis3
fdim/fdimf to libm-sysdep_routines.
* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdim-vis3.S: New
file.
* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdim.S: New file.
* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdimf-vis3.S: New
file.
* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdimf.S: New file.
* sysdeps/sparc/sparc32/sparcv9/fpu/s_fdim.S: New file.
* sysdeps/sparc/sparc32/sparcv9/fpu/s_fdimf.S: New file.
* sysdeps/sparc/sparc32/fpu/s_fdim.S: New file.
* sysdeps/sparc/sparc32/fpu/s_fdimf.S: New file.
* sysdeps/sparc/sparc64/fpu/s_fdim.S: New file.
* sysdeps/sparc/sparc64/fpu/s_fdimf.S: New file.