mips64: run FPU tests only when FPU is available

Check whether the target platform is meant to have an FPU before executing
tests that make use of a floating-point unit.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14571 a5019735-40e9-0310-863c-91ae7b9d1cf9
9 files changed