LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ cblas_chpr()

void cblas_chpr ( CBLAS_LAYOUT  layout,
CBLAS_UPLO  Uplo,
const int  N,
const float  alpha,
const void *  X,
const int  incX,
void *  A 
)

Definition at line 12 of file cblas_chpr.c.

15 {
16  char UL;
17 #ifdef F77_CHAR
18  F77_CHAR F77_UL;
19 #else
20  #define F77_UL &UL
21 #endif
22 
23 #ifdef F77_INT
24  F77_INT F77_N=N, F77_incX=incX;
25 #else
26  #define F77_N N
27  #define F77_incX incx
28 #endif
29  int n, i, tincx, incx=incX;
30  float *x=(float *)X, *xx=(float *)X, *tx, *st;
31 
32  extern int CBLAS_CallFromC;
33  extern int RowMajorStrg;
34  RowMajorStrg = 0;
35 
36  CBLAS_CallFromC = 1;
37  if (layout == CblasColMajor)
38  {
39  if (Uplo == CblasLower) UL = 'L';
40  else if (Uplo == CblasUpper) UL = 'U';
41  else
42  {
43  cblas_xerbla(2, "cblas_chpr","Illegal Uplo setting, %d\n",Uplo );
44  CBLAS_CallFromC = 0;
45  RowMajorStrg = 0;
46  return;
47  }
48  #ifdef F77_CHAR
49  F77_UL = C2F_CHAR(&UL);
50  #endif
51 
52  F77_chpr(F77_UL, &F77_N, &alpha, X, &F77_incX, A);
53 
54  } else if (layout == CblasRowMajor)
55  {
56  RowMajorStrg = 1;
57  if (Uplo == CblasUpper) UL = 'L';
58  else if (Uplo == CblasLower) UL = 'U';
59  else
60  {
61  cblas_xerbla(2, "cblas_chpr","Illegal Uplo setting, %d\n", Uplo);
62  CBLAS_CallFromC = 0;
63  RowMajorStrg = 0;
64  return;
65  }
66  #ifdef F77_CHAR
67  F77_UL = C2F_CHAR(&UL);
68  #endif
69  if (N > 0)
70  {
71  n = N << 1;
72  x = malloc(n*sizeof(float));
73  tx = x;
74  if( incX > 0 ) {
75  i = incX << 1;
76  tincx = 2;
77  st= x+n;
78  } else {
79  i = incX *(-2);
80  tincx = -2;
81  st = x-2;
82  x +=(n-2);
83  }
84  do
85  {
86  *x = *xx;
87  x[1] = -xx[1];
88  x += tincx ;
89  xx += i;
90  }
91  while (x != st);
92  x=tx;
93  #ifdef F77_INT
94  F77_incX = 1;
95  #else
96  incx = 1;
97  #endif
98  }
99  else x = (float *) X;
100 
101  F77_chpr(F77_UL, &F77_N, &alpha, x, &F77_incX, A);
102 
103  } else
104  {
105  cblas_xerbla(1, "cblas_chpr","Illegal layout setting, %d\n", layout);
106  CBLAS_CallFromC = 0;
107  RowMajorStrg = 0;
108  return;
109  }
110  if(X!=x)
111  free(x);
112  CBLAS_CallFromC = 0;
113  RowMajorStrg = 0;
114  return;
115 }
int RowMajorStrg
Definition: cblas_globals.c:2
#define F77_N
#define F77_incX
#define F77_UL
#define F77_chpr
Definition: cblas_f77.h:114
int CBLAS_CallFromC
Definition: cblas_globals.c:1
void cblas_xerbla(int p, const char *rout, const char *form,...)
Definition: cblas_xerbla.c:8
#define N
Definition: example_user.c:10
Here is the call graph for this function:
Here is the caller graph for this function: