aboutsummaryrefslogtreecommitdiffstats
path: root/contrib/libs/cblas/cblas_interface/cblas_chpr.c
blob: 9b39f38bdff487439172ed5ed6884f3ae89df5eb (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
/*
 * cblas_chpr.c
 * The program is a C interface to chpr.
 * 
 * Keita Teranishi  3/23/98
 *
 */
#include <stdio.h>
#include <stdlib.h>
#include "cblas.h"
#include "cblas_f77.h"
void cblas_chpr(const enum CBLAS_ORDER order, const enum CBLAS_UPLO Uplo,
                const int N, const float alpha, const void *X,
                const int incX, void *A)
{
   char UL;
#ifdef F77_CHAR
   F77_CHAR F77_UL;
#else
   #define F77_UL &UL
#endif

#ifdef F77_INT
   F77_INT F77_N=N, F77_incX=incX;
#else
   #define F77_N N
   #define F77_incX incx
#endif
   int n, i, tincx, incx=incX;
   float *x=(float *)X, *xx=(float *)X, *tx, *st;

   extern int CBLAS_CallFromC;
   extern int RowMajorStrg;
   RowMajorStrg = 0;
 
   CBLAS_CallFromC = 1;
   if (order == CblasColMajor)
   {
      if (Uplo == CblasLower) UL = 'L';
      else if (Uplo == CblasUpper) UL = 'U';
      else 
      {
         cblas_xerbla(2, "cblas_chpr","Illegal Uplo setting, %d\n",Uplo );
         CBLAS_CallFromC = 0;
         RowMajorStrg = 0;
         return;
      }
      #ifdef F77_CHAR
         F77_UL = C2F_CHAR(&UL);
      #endif

      F77_chpr(F77_UL, &F77_N, &alpha, X, &F77_incX, A);

   }  else if (order == CblasRowMajor)
   {
      RowMajorStrg = 1;
      if (Uplo == CblasUpper) UL = 'L';
      else if (Uplo == CblasLower) UL = 'U';
      else 
      {
         cblas_xerbla(2, "cblas_chpr","Illegal Uplo setting, %d\n", Uplo);
         CBLAS_CallFromC = 0;
         RowMajorStrg = 0;
         return;
      }
      #ifdef F77_CHAR
         F77_UL = C2F_CHAR(&UL);
      #endif
      if (N > 0)
      {
         n = N << 1;
         x = malloc(n*sizeof(float));
         tx = x;
         if( incX > 0 ) {
            i = incX << 1;
            tincx = 2;
            st= x+n;
         } else { 
            i = incX *(-2);
            tincx = -2;
            st = x-2; 
            x +=(n-2); 
         }
         do
         {
            *x = *xx;
            x[1] = -xx[1];
            x += tincx ;
            xx += i;
         }
         while (x != st);
         x=tx;
         #ifdef F77_INT
            F77_incX = 1;
         #else
            incx = 1;
         #endif
      }
      else x = (float *) X;

      F77_chpr(F77_UL, &F77_N, &alpha, x, &F77_incX, A);

   } else 
   {
      cblas_xerbla(1, "cblas_chpr","Illegal Order setting, %d\n", order);
      CBLAS_CallFromC = 0;
      RowMajorStrg = 0;
      return;
   }
   if(X!=x)
     free(x);
   CBLAS_CallFromC = 0;
   RowMajorStrg = 0;
   return;
}