0.8.11.5:

0.8.11.5:
	Storing a floating point control word on the stack, then calling
	out to C, is not guaranteed to behave when the called function
	is likely to be messing around with the stack (purify() in
	particular).
	... reload the floating point control word before setting the
		precision.  This differs slightly in semantics from
		before: changes caused by the C code will be propagated
		to Lisp