Add accelerated elementary functions
This carries over the useful parts of !3 (closed) but rather than trying to emulate missing VFPv4 opcodes through the undefined instruction handler it instead exposes the fused MACs as leaf functions callable from a HLL. In addition there are 11x leaf functions to replace all of the FPA transcendental opcodes.
The Test/FMA test bed has been updated to check that at minimum the exceptions expected by C are produced.
The Test/Elementary test bed compares a given implementation against a golden reference then checks that the exceptions expected by C are raised as a minimum. All tests pass comparing with CRLibM to within 1 ulp, and hence also exceeds the accuracy of FPEmulator.
As a first HLL to use these hooks take BASICVFP for a spin.