Add IR level support for 16 bit floating point types (Ity_F16) and add 
four new IROps that use it:
Iop_F16toF64, Iop_F64toF16, Iop_F16toF32, Iop_F32toF16. 



git-svn-id: svn://svn.valgrind.org/vex/trunk@3110 8f6e269a-dfd6-0310-a8e1-e2731360e62c
3 files changed