Complex_multiplication_bybuf   xtlang


Defined in:  https://github.com/digego/extempore/tree/v0.8.9/libs/core/math.xtm

Implementation

(bind-func Complex_multiplication_bybuf
  (lambda (a:Complexd* b:Complexd* c:Complexd* len)
    (let ((i 0))
      (dotimes (i len)
        (tset! (pref-ptr c i) 0
               (- (* (tref (pref-ptr a i) 0)
                     (tref (pref-ptr b i) 0))
                  (* (tref (pref-ptr a i) 1)
                     (tref (pref-ptr b i) 1))))
        (tset! (pref-ptr c i) 1
               (+ (* (tref (pref-ptr a i) 0)
                     (tref (pref-ptr b i) 1))
                  (* (tref (pref-ptr a i) 1)
                     (tref (pref-ptr b i) 0)))))
      void)))


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