for i := 0; i < len(vf); i++ {
		if f := Logb(vf[i]); logb[i] != f {
			t.Errorf("Logb(%g) = %g, want %g", vf[i], f, logb[i])
		}
	}
	for i := 0; i < len(vflogbSC); i++ {
		if f := Logb(vflogbSC[i]); !alike(logbSC[i], f) {
			t.Errorf("Logb(%g) = %g, want %g", vflogbSC[i], f, logbSC[i])
		}
	}
	for i := 0; i < len(vffrexpBC); i++ {
		if f := Logb(vffrexpBC[i]); !alike(logbBC[i], f) {