;;; Compiled by f2cl version 2.0 beta Date: 2006/12/21 03:42:11 
;;; Using Lisp CMU Common Lisp CVS Head 2006-12-02 00:15:46 (19D)
;;; 
;;; Options: ((:prune-labels nil) (:auto-save t) (:relaxed-array-decls t)
;;;           (:coerce-assigns :as-needed) (:array-type ':array)
;;;           (:array-slicing t) (:declare-common nil)
;;;           (:float-format double-float))

(in-package :blas)


(defun zrotg (ca cb c s)
  (declare (type (double-float) c) (type (f2cl-lib:complex16) s cb ca))
  (prog ((alpha #C(0.0 0.0)) (norm 0.0) (scale 0.0))
    (declare (type (double-float) scale norm)
             (type (f2cl-lib:complex16) alpha))
    (if (/= (f2cl-lib:cdabs ca) 0.0) (go label10))
    (setf c 0.0)
    (setf s (f2cl-lib:cmplx 1.0 0.0))
    (setf ca cb)
    (go label20)
   label10
    (setf scale
            (coerce (+ (f2cl-lib:cdabs ca) (f2cl-lib:cdabs cb)) 'double-float))
    (setf norm
            (* scale
               (f2cl-lib:dsqrt
                (+ (expt (f2cl-lib:cdabs (/ ca (f2cl-lib:dcmplx scale 0.0))) 2)
                   (expt (f2cl-lib:cdabs (/ cb (f2cl-lib:dcmplx scale 0.0)))
                         2)))))
    (setf alpha (/ ca (f2cl-lib:cdabs ca)))
    (setf c (/ (f2cl-lib:cdabs ca) norm))
    (setf s (/ (* alpha (f2cl-lib:dconjg cb)) norm))
    (setf ca (* alpha norm))
   label20
    (go end_label)
   end_label
    (return (values ca nil c s))))

(in-package #-gcl #:cl-user #+gcl "CL-USER")
#+#.(cl:if (cl:find-package '#:f2cl) '(and) '(or))
(eval-when (:load-toplevel :compile-toplevel :execute)
  (setf (gethash 'fortran-to-lisp::zrotg fortran-to-lisp::*f2cl-function-info*)
          (fortran-to-lisp::make-f2cl-finfo
           :arg-types '((fortran-to-lisp::complex16)
                        (fortran-to-lisp::complex16) (double-float)
                        (fortran-to-lisp::complex16))
           :return-values '(fortran-to-lisp::ca nil fortran-to-lisp::c
                            fortran-to-lisp::s)
           :calls 'nil)))