C99 math functions:

	(functions generally missing, including their "float" counterparts)
	exp2
	exp2f
	fma
	fmaf
	log2
	log2f
	lrint
	lrintf
	lround
	lroundf
	nearbyint
	nearbyintf
	remquo
	remquof
	round
	roundf
	tgamma
	tgammaf
	trunc
	truncf