LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ cblas_zgbmv()

void cblas_zgbmv ( CBLAS_LAYOUT  layout,
CBLAS_TRANSPOSE  TransA,
const int  M,
const int  N,
const int  KL,
const int  KU,
const void *  alpha,
const void *  A,
const int  lda,
const void *  X,
const int  incX,
const void *  beta,
void *  Y,
const int  incY 
)

Definition at line 12 of file cblas_zgbmv.c.

18 {
19  char TA;
20 #ifdef F77_CHAR
21  F77_CHAR F77_TA;
22 #else
23  #define F77_TA &TA
24 #endif
25 #ifdef F77_INT
26  F77_INT F77_M=M, F77_N=N, F77_lda=lda, F77_incX=incX, F77_incY=incY;
27  F77_INT F77_KL=KL,F77_KU=KU;
28 #else
29  #define F77_M M
30  #define F77_N N
31  #define F77_lda lda
32  #define F77_KL KL
33  #define F77_KU KU
34  #define F77_incX incx
35  #define F77_incY incY
36 #endif
37  int n, i=0, incx=incX;
38  const double *xx= (double *)X, *alp= (double *)alpha, *bet = (double *)beta;
39  double ALPHA[2],BETA[2];
40  int tincY, tincx;
41  double *x=(double *)X, *y=(double *)Y, *st=0, *tx;
42  extern int CBLAS_CallFromC;
43  extern int RowMajorStrg;
44  RowMajorStrg = 0;
45 
46  CBLAS_CallFromC = 1;
47  if (layout == CblasColMajor)
48  {
49  if (TransA == CblasNoTrans) TA = 'N';
50  else if (TransA == CblasTrans) TA = 'T';
51  else if (TransA == CblasConjTrans) TA = 'C';
52  else
53  {
54  cblas_xerbla(2, "cblas_zgbmv","Illegal TransA setting, %d\n", TransA);
55  CBLAS_CallFromC = 0;
56  RowMajorStrg = 0;
57  return;
58  }
59  #ifdef F77_CHAR
60  F77_TA = C2F_CHAR(&TA);
61  #endif
62  F77_zgbmv(F77_TA, &F77_M, &F77_N, &F77_KL, &F77_KU, alpha,
63  A, &F77_lda, X, &F77_incX, beta, Y, &F77_incY);
64  }
65  else if (layout == CblasRowMajor)
66  {
67  RowMajorStrg = 1;
68  if (TransA == CblasNoTrans) TA = 'T';
69  else if (TransA == CblasTrans) TA = 'N';
70  else if (TransA == CblasConjTrans)
71  {
72  ALPHA[0]= *alp;
73  ALPHA[1]= -alp[1];
74  BETA[0]= *bet;
75  BETA[1]= -bet[1];
76  TA = 'N';
77  if (M > 0)
78  {
79  n = M << 1;
80  x = malloc(n*sizeof(double));
81  tx = x;
82 
83  if( incX > 0 ) {
84  i = incX << 1 ;
85  tincx = 2;
86  st= x+n;
87  } else {
88  i = incX *(-2);
89  tincx = -2;
90  st = x-2;
91  x +=(n-2);
92  }
93  do
94  {
95  *x = *xx;
96  x[1] = -xx[1];
97  x += tincx ;
98  xx += i;
99  }
100  while (x != st);
101  x=tx;
102 
103  #ifdef F77_INT
104  F77_incX = 1;
105  #else
106  incx = 1;
107  #endif
108 
109  if( incY > 0 )
110  tincY = incY;
111  else
112  tincY = -incY;
113 
114  y++;
115 
116  if (N > 0)
117  {
118  i = tincY << 1;
119  n = i * N ;
120  st = y + n;
121  do {
122  *y = -(*y);
123  y += i;
124  } while(y != st);
125  y -= n;
126  }
127  }
128  else x = (double *) X;
129 
130 
131  }
132  else
133  {
134  cblas_xerbla(2, "cblas_zgbmv","Illegal TransA setting, %d\n", TransA);
135  CBLAS_CallFromC = 0;
136  RowMajorStrg = 0;
137  return;
138  }
139  #ifdef F77_CHAR
140  F77_TA = C2F_CHAR(&TA);
141  #endif
142  if (TransA == CblasConjTrans)
143  F77_zgbmv(F77_TA, &F77_N, &F77_M, &F77_KU, &F77_KL, ALPHA,
144  A ,&F77_lda, x,&F77_incX, BETA, Y, &F77_incY);
145  else
146  F77_zgbmv(F77_TA, &F77_N, &F77_M, &F77_KU, &F77_KL, alpha,
147  A ,&F77_lda, x,&F77_incX, beta, Y, &F77_incY);
148  if (TransA == CblasConjTrans)
149  {
150  if (x != X) free(x);
151  if (N > 0)
152  {
153  do
154  {
155  *y = -(*y);
156  y += i;
157  }
158  while (y != st);
159  }
160  }
161  }
162  else cblas_xerbla(1, "cblas_zgbmv", "Illegal layout setting, %d\n", layout);
163  CBLAS_CallFromC = 0;
164  RowMajorStrg = 0;
165  return;
166 }
#define F77_KL
int RowMajorStrg
Definition: cblas_globals.c:2
#define F77_lda
#define F77_TA
#define F77_incY
#define F77_zgbmv
Definition: cblas_f77.h:151
#define F77_KU
#define F77_M
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_N
#define F77_incX
#define N
Definition: example_user.c:10
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