from floating-point to an integer format raise an invalid exception.
For the provided specializations (8086 and RISC-V), changed the result
of converting a negative floating-point value to an unsigned integer
format to now be zero. (Also renamed `shiftCount' inside functions to
`shiftDist'.)
"RISC-V" to "RISCV". (In the names of machines, compilers, targets, etc.,
hyphens are intended for specifying variations and for forming compound
names from multiple such components. While some arbitrariness in the
application of this rule is inevitable, clearly RISC-V is not a "V"
variation of an existing "RISC" architecture but rather an entirely new
architecture.)
John Hauser