Anyone other than me want/need the functions specified by svr4's
<ieeefp.h>:
	fp{get,set}{round,mask,sticky}()

Naturally, they could only be implemented on machines with IEEE FP.

Assuming we want them, where should they go?  libc or libm?  

Solaris puts them in libc, presumably so that fpsetround() can set the
variable __flt_rounds which <float.h>'s FLT_ROUNDS expands too.  I'd
probably do the same, unless given a good reason to do otherwise.

	--jtc