LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ cblas_zher()

void cblas_zher ( CBLAS_LAYOUT  layout,
CBLAS_UPLO  Uplo,
const int  N,
const double  alpha,
const void *  X,
const int  incX,
void *  A,
const int  lda 
)

Definition at line 12 of file cblas_zher.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_lda=lda, F77_incX=incX;
25 #else
26  #define F77_N N
27  #define F77_lda lda
28  #define F77_incX incx
29 #endif
30  int n, i, tincx, incx=incX;
31  double *x=(double *)X, *xx=(double *)X, *tx, *st;
32 
33  extern int CBLAS_CallFromC;
34  extern int RowMajorStrg;
35  RowMajorStrg = 0;
36 
37  CBLAS_CallFromC = 1;
38  if (layout == CblasColMajor)
39  {
40  if (Uplo == CblasLower) UL = 'L';
41  else if (Uplo == CblasUpper) UL = 'U';
42  else
43  {
44  cblas_xerbla(2, "cblas_zher","Illegal Uplo setting, %d\n",Uplo );
45  CBLAS_CallFromC = 0;
46  RowMajorStrg = 0;
47  return;
48  }
49  #ifdef F77_CHAR
50  F77_UL = C2F_CHAR(&UL);
51  #endif
52 
53  F77_zher(F77_UL, &F77_N, &alpha, X, &F77_incX, A, &F77_lda);
54 
55  } else if (layout == CblasRowMajor)
56  {
57  RowMajorStrg = 1;
58  if (Uplo == CblasUpper) UL = 'L';
59  else if (Uplo == CblasLower) UL = 'U';
60  else
61  {
62  cblas_xerbla(2, "cblas_zher","Illegal Uplo setting, %d\n", Uplo);
63  CBLAS_CallFromC = 0;
64  RowMajorStrg = 0;
65  return;
66  }
67  #ifdef F77_CHAR
68  F77_UL = C2F_CHAR(&UL);
69  #endif
70  if (N > 0)
71  {
72  n = N << 1;
73  x = malloc(n*sizeof(double));
74  tx = x;
75  if( incX > 0 ) {
76  i = incX << 1 ;
77  tincx = 2;
78  st= x+n;
79  } else {
80  i = incX *(-2);
81  tincx = -2;
82  st = x-2;
83  x +=(n-2);
84  }
85  do
86  {
87  *x = *xx;
88  x[1] = -xx[1];
89  x += tincx ;
90  xx += i;
91  }
92  while (x != st);
93  x=tx;
94 
95  #ifdef F77_INT
96  F77_incX = 1;
97  #else
98  incx = 1;
99  #endif
100  }
101  else x = (double *) X;
102  F77_zher(F77_UL, &F77_N, &alpha, x, &F77_incX, A, &F77_lda);
103  } else cblas_xerbla(1, "cblas_zher", "Illegal layout setting, %d\n", layout);
104  if(X!=x)
105  free(x);
106 
107  CBLAS_CallFromC = 0;
108  RowMajorStrg = 0;
109  return;
110 }
#define F77_N
int RowMajorStrg
Definition: cblas_globals.c:2
#define F77_UL
#define F77_lda
#define F77_zher
Definition: cblas_f77.h:122
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 F77_incX
#define N
Definition: example_user.c:10
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