share/lapack/blas/dnrm2.lisp

   1 ;;; Compiled by f2cl version:
   2 ;;; ("f2cl1.l,v 2edcbd958861 2012/05/30 03:34:52 toy $"
   3 ;;;  "f2cl2.l,v 96616d88fb7e 2008/02/22 22:19:34 rtoy $"
   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 3fe93de3be82 2012/05/06 02:17:14 toy $"
   7 ;;;  "f2cl6.l,v 1d5cbacbb977 2008/08/24 00:56:27 rtoy $"
   8 ;;;  "macros.l,v 3fe93de3be82 2012/05/06 02:17:14 toy $")
   9
  10 ;;; Using Lisp CMU Common Lisp 20d (20D 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 :blas)
  18
  19
  20 (let* ((one 1.0) (zero 0.0))
  21   (declare (type (double-float 1.0 1.0) one)
  22            (type (double-float 0.0 0.0) zero)
  23            (ignorable one zero))
  24   (defun dnrm2 (n x incx)
  25     (declare (type (array double-float (*)) x)
  26              (type (f2cl-lib:integer4) incx n))
  27     (f2cl-lib:with-multi-array-data
  28         ((x double-float x-%data% x-%offset%))
  29       (prog ((absxi 0.0) (norm 0.0) (scale 0.0) (ssq 0.0) (ix 0) (dnrm2 0.0))
  30         (declare (type (f2cl-lib:integer4) ix)
  31                  (type (double-float) absxi norm scale ssq dnrm2))
  32         (cond
  33           ((or (< n 1) (< incx 1))
  34            (setf norm zero))
  35           ((= n 1)
  36            (setf norm (abs (f2cl-lib:fref x-%data% (1) ((1 *)) x-%offset%))))
  37           (t
  38            (setf scale zero)
  39            (setf ssq one)
  40            (f2cl-lib:fdo (ix 1 (f2cl-lib:int-add ix incx))
  41                          ((> ix
  42                              (f2cl-lib:int-add 1
  43                                                (f2cl-lib:int-mul
  44                                                 (f2cl-lib:int-add n
  45                                                                   (f2cl-lib:int-sub
  46                                                                    1))
  47                                                 incx)))
  48                           nil)
  49              (tagbody
  50                (cond
  51                  ((/= (f2cl-lib:fref x (ix) ((1 *))) zero)
  52                   (setf absxi
  53                           (abs
  54                            (f2cl-lib:fref x-%data% (ix) ((1 *)) x-%offset%)))
  55                   (cond
  56                     ((< scale absxi)
  57                      (setf ssq (+ one (* ssq (expt (/ scale absxi) 2))))
  58                      (setf scale absxi))
  59                     (t
  60                      (setf ssq (+ ssq (expt (/ absxi scale) 2)))))))
  61               label10))
  62            (setf norm (* scale (f2cl-lib:fsqrt ssq)))))
  63         (setf dnrm2 norm)
  64         (go end_label)
  65        end_label
  66         (return (values dnrm2 nil nil nil))))))
  67
  68 (in-package #-gcl #:cl-user #+gcl "CL-USER")
  69 #+#.(cl:if (cl:find-package '#:f2cl) '(and) '(or))
  70 (eval-when (:load-toplevel :compile-toplevel :execute)
  71   (setf (gethash 'fortran-to-lisp::dnrm2 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