share/colnew/lisp/idamax.lisp

   1 ;;; Compiled by f2cl version:
   2 ;;; ("f2cl1.l,v 1.221 2010/05/26 19:25:52 rtoy Exp $"
   3 ;;;  "f2cl2.l,v 1.37 2008/02/22 22:19:33 rtoy Exp $"
   4 ;;;  "f2cl3.l,v 1.6 2008/02/22 22:19:33 rtoy Exp $"
   5 ;;;  "f2cl4.l,v 1.7 2008/02/22 22:19:34 rtoy Exp $"
   6 ;;;  "f2cl5.l,v 1.204 2010/02/23 05:21:30 rtoy Exp $"
   7 ;;;  "f2cl6.l,v 1.48 2008/08/24 00:56:27 rtoy Exp $"
   8 ;;;  "macros.l,v 1.114 2010/05/17 01:42:14 rtoy Exp $")
   9
  10 ;;; Using Lisp CMU Common Lisp CVS Head 2010-05-25 18:21:07 (20A 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 :colnew)
  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) (idamax 0))
  26       (declare (type (double-float) dmax)
  27                (type (f2cl-lib:integer4) idamax ix i))
  28       (setf idamax 0)
  29       (if (or (< n 1) (<= incx 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       (setf dmax
  35               (f2cl-lib:dabs
  36                (f2cl-lib:fref dx-%data% (1) ((1 *)) dx-%offset%)))
  37       (setf ix (f2cl-lib:int-add ix incx))
  38       (f2cl-lib:fdo (i 2 (f2cl-lib:int-add i 1))
  39                     ((> i n) nil)
  40         (tagbody
  41           (if
  42            (<=
  43             (f2cl-lib:dabs (f2cl-lib:fref dx-%data% (ix) ((1 *)) dx-%offset%))
  44             dmax)
  45            (go label5))
  46           (setf idamax i)
  47           (setf dmax
  48                   (f2cl-lib:dabs
  49                    (f2cl-lib:fref dx-%data% (ix) ((1 *)) dx-%offset%)))
  50          label5
  51           (setf ix (f2cl-lib:int-add ix incx))
  52          label10))
  53       (go end_label)
  54      label20
  55       (setf dmax
  56               (f2cl-lib:dabs
  57                (f2cl-lib:fref dx-%data% (1) ((1 *)) dx-%offset%)))
  58       (f2cl-lib:fdo (i 2 (f2cl-lib:int-add i 1))
  59                     ((> i n) nil)
  60         (tagbody
  61           (if
  62            (<=
  63             (f2cl-lib:dabs (f2cl-lib:fref dx-%data% (i) ((1 *)) dx-%offset%))
  64             dmax)
  65            (go label30))
  66           (setf idamax i)
  67           (setf dmax
  68                   (f2cl-lib:dabs
  69                    (f2cl-lib:fref dx-%data% (i) ((1 *)) dx-%offset%)))
  70          label30))
  71       (go end_label)
  72      end_label
  73       (return (values idamax nil nil nil)))))
  74
  75 (in-package #-gcl #:cl-user #+gcl "CL-USER")
  76 #+#.(cl:if (cl:find-package '#:f2cl) '(and) '(or))
  77 (eval-when (:load-toplevel :compile-toplevel :execute)
  78   (setf (gethash 'fortran-to-lisp::idamax
  79                  fortran-to-lisp::*f2cl-function-info*)
  80           (fortran-to-lisp::make-f2cl-finfo
  81            :arg-types '((fortran-to-lisp::integer4) (array double-float (*))
  82                         (fortran-to-lisp::integer4))
  83            :return-values '(nil nil nil)
  84            :calls 'nil)))
  85