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mndscal.cxx
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1 // @(#)root/minuit2:$Id$
2 // Authors: M. Winkler, F. James, L. Moneta, A. Zsenei 2003-2005
3 
4 /**********************************************************************
5  * *
6  * Copyright (c) 2005 LCG ROOT Math team, CERN/PH-SFT *
7  * *
8  **********************************************************************/
9 
10 /* dscal.f -- translated by f2c (version 20010320).
11  You must link the resulting object file with the libraries:
12  -lf2c -lm (in that order)
13 */
14 
15 namespace ROOT {
16 
17  namespace Minuit2 {
18 
19 
20 int Mndscal(unsigned int n, double da, double* dx, int incx) {
21  /* System generated locals */
22  int i__1, i__2;
23 
24  /* Local variables */
25  int i__, m, nincx, mp1;
26 
27 
28  /* scales a vector by a constant. */
29  /* uses unrolled loops for increment equal to one. */
30  /* jack dongarra, linpack, 3/11/78. */
31  /* modified 3/93 to return if incx .le. 0. */
32  /* modified 12/3/93, array(1) declarations changed to array(*) */
33 
34 
35  /* Parameter adjustments */
36  --dx;
37 
38  /* Function Body */
39  if (n <= 0 || incx <= 0) {
40  return 0;
41  }
42  if (incx == 1) {
43  goto L20;
44  }
45 
46  /* code for increment not equal to 1 */
47 
48  nincx = n * incx;
49  i__1 = nincx;
50  i__2 = incx;
51  for (i__ = 1; i__2 < 0 ? i__ >= i__1 : i__ <= i__1; i__ += i__2) {
52  dx[i__] = da * dx[i__];
53  /* L10: */
54  }
55  return 0;
56 
57  /* code for increment equal to 1 */
58 
59 
60  /* clean-up loop */
61 
62 L20:
63  m = n % 5;
64  if (m == 0) {
65  goto L40;
66  }
67  i__2 = m;
68  for (i__ = 1; i__ <= i__2; ++i__) {
69  dx[i__] = da * dx[i__];
70  /* L30: */
71  }
72  if (n < 5) {
73  return 0;
74  }
75 L40:
76  mp1 = m + 1;
77  i__2 = n;
78  for (i__ = mp1; i__ <= i__2; i__ += 5) {
79  dx[i__] = da * dx[i__];
80  dx[i__ + 1] = da * dx[i__ + 1];
81  dx[i__ + 2] = da * dx[i__ + 2];
82  dx[i__ + 3] = da * dx[i__ + 3];
83  dx[i__ + 4] = da * dx[i__ + 4];
84  /* L50: */
85  }
86  return 0;
87 } /* dscal_ */
88 
89  } // namespace Minuit2
90 
91 } // namespace ROOT
m
auto * m
Definition: textangle.C:8
n
const Int_t n
Definition: legend1.C:16
ROOT::Minuit2::Mndscal
int Mndscal(unsigned int, double, double *, int)
Definition: mndscal.cxx:28
ROOT
VSD Structures.
Definition: StringConv.hxx:21