share/odepack/src/idamax.lisp

   1 ;;; Compiled by f2cl version:
   2 ;;; ("f2cl1.l,v 95098eb54f13 2013/04/01 00:45:16 toy $"
   3 ;;;  "f2cl2.l,v 95098eb54f13 2013/04/01 00:45:16 toy $"
   4 ;;;  "f2cl3.l,v 96616d88fb7e 2008/02/22 22:19:34 rtoy $"
   5 ;;;  "f2cl4.l,v 96616d88fb7e 2008/02/22 22:19:34 rtoy $"
   6 ;;;  "f2cl5.l,v 95098eb54f13 2013/04/01 00:45:16 toy $"
   7 ;;;  "f2cl6.l,v 1d5cbacbb977 2008/08/24 00:56:27 rtoy $"
   8 ;;;  "macros.l,v 1409c1352feb 2013/03/24 20:44:50 toy $")
   9
  10 ;;; Using Lisp CMU Common Lisp snapshot-2017-01 (21B Unicode)
  11 ;;;
  12 ;;; Options: ((:prune-labels nil) (:auto-save t) (:relaxed-array-decls t)
  13 ;;;           (:coerce-assigns :as-needed) (:array-type ':array)
  14 ;;;           (:array-slicing t) (:declare-common nil)
  15 ;;;           (:float-format double-float))
  16
  17 (in-package "ODEPACK")
  18
  19
  20 (defun idamax (n dx incx)
  21   (declare (type (array double-float (*)) dx)
  22            (type (f2cl-lib:integer4) incx n))
  23   (f2cl-lib:with-multi-array-data
  24       ((dx double-float dx-%data% dx-%offset%))
  25     (prog ((i 0) (ix 0) (dmax 0.0) (xmag 0.0) (idamax 0))
  26       (declare (type (double-float) xmag dmax)
  27                (type (f2cl-lib:integer4) idamax ix i))
  28       (setf idamax 0)
  29       (if (<= n 0) (go end_label))
  30       (setf idamax 1)
  31       (if (= n 1) (go end_label))
  32       (if (= incx 1) (go label20))
  33       (setf ix 1)
  34       (if (< incx 0)
  35           (setf ix
  36                   (f2cl-lib:int-add
  37                    (f2cl-lib:int-mul (f2cl-lib:int-sub 1 n) incx)
  38                    1)))
  39       (setf dmax (abs (f2cl-lib:fref dx-%data% (ix) ((1 *)) dx-%offset%)))
  40       (setf ix (f2cl-lib:int-add ix incx))
  41       (f2cl-lib:fdo (i 2 (f2cl-lib:int-add i 1))
  42                     ((> i n) nil)
  43         (tagbody
  44           (setf xmag (abs (f2cl-lib:fref dx-%data% (ix) ((1 *)) dx-%offset%)))
  45           (cond
  46             ((> xmag dmax)
  47              (setf idamax i)
  48              (setf dmax xmag)))
  49           (setf ix (f2cl-lib:int-add ix incx))
  50          label10))
  51       (go end_label)
  52      label20
  53       (setf dmax (abs (f2cl-lib:fref dx-%data% (1) ((1 *)) dx-%offset%)))
  54       (f2cl-lib:fdo (i 2 (f2cl-lib:int-add i 1))
  55                     ((> i n) nil)
  56         (tagbody
  57           (setf xmag (abs (f2cl-lib:fref dx-%data% (i) ((1 *)) dx-%offset%)))
  58           (cond
  59             ((> xmag dmax)
  60              (setf idamax i)
  61              (setf dmax xmag)))
  62          label30))
  63       (go end_label)
  64      end_label
  65       (return (values idamax nil nil nil)))))
  66
  67 (in-package #:cl-user)
  68 #+#.(cl:if (cl:find-package '#:f2cl) '(and) '(or))
  69 (eval-when (:load-toplevel :compile-toplevel :execute)
  70   (setf (gethash 'fortran-to-lisp::idamax
  71                  fortran-to-lisp::*f2cl-function-info*)
  72           (fortran-to-lisp::make-f2cl-finfo
  73            :arg-types '((fortran-to-lisp::integer4) (array double-float (*))
  74                         (fortran-to-lisp::integer4))
  75            :return-values '(nil nil nil)
  76            :calls 'nil)))
  77