(log (+ number (sqrt (- (* number number) 1.0d0))) #.(exp 1.0d0)))
(declaim (inline %atanh))
(defun %atanh (number)
- (let ((ratio (/ (1+ number) (1- number))))
+ (let ((ratio (/ (+ 1 number) (- 1 number))))
;; Were we effectively zero?
(if (= ratio -1.0d0)
0.0d0
(when (zerop (logior y-ihi y-lo))
(return-from real-expt (coerce 1d0 rtype)))
;; +-NaN return x+y
+ ;; FIXME: Hardcoded qNaN/sNaN values are not portable.
(when (or (> x-ihi #x7ff00000)
(and (= x-ihi #x7ff00000) (/= x-lo 0))
(> y-ihi #x7ff00000)
"Return the logarithm of NUMBER in the base BASE, which defaults to e."
(if base-p
(cond
- ((zerop base) 0f0) ; FIXME: type
+ ((zerop base)
+ (if (or (typep number 'double-float) (typep base 'double-float))
+ 0.0d0
+ 0.0f0))
((and (typep number '(integer (0) *))
(typep base '(integer (0) *)))
(coerce (/ (log2 number) (log2 base)) 'single-float))
- (t (/ (log number) (log base))))
+ ((and (typep number 'integer) (typep base 'double-float))
+ ;; No single float intermediate result
+ (/ (log2 number) (log base 2.0d0)))
+ ((and (typep number 'double-float) (typep base 'integer))
+ (/ (log number 2.0d0) (log2 base)))
+ (t
+ (/ (log number) (log base))))
(number-dispatch ((number number))
(((foreach fixnum bignum))
(if (minusp number)