LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ cblas_ztbsv()

void cblas_ztbsv ( CBLAS_LAYOUT  layout,
CBLAS_UPLO  Uplo,
CBLAS_TRANSPOSE  TransA,
CBLAS_DIAG  Diag,
const int  N,
const int  K,
const void *  A,
const int  lda,
void *  X,
const int  incX 
)

Definition at line 10 of file cblas_ztbsv.c.

14 {
15  char TA;
16  char UL;
17  char DI;
18 #ifdef F77_CHAR
19  F77_CHAR F77_TA, F77_UL, F77_DI;
20 #else
21  #define F77_TA &TA
22  #define F77_UL &UL
23  #define F77_DI &DI
24 #endif
25 #ifdef F77_INT
26  F77_INT F77_N=N, F77_lda=lda, F77_K=K, F77_incX=incX;
27 #else
28  #define F77_N N
29  #define F77_K K
30  #define F77_lda lda
31  #define F77_incX incX
32 #endif
33  int n, i=0, tincX;
34  double *st=0,*x=(double *)X;
35  extern int CBLAS_CallFromC;
36  extern int RowMajorStrg;
37  RowMajorStrg = 0;
38 
39  CBLAS_CallFromC = 1;
40  if (layout == CblasColMajor)
41  {
42  if (Uplo == CblasUpper) UL = 'U';
43  else if (Uplo == CblasLower) UL = 'L';
44  else
45  {
46  cblas_xerbla(2, "cblas_ztbsv","Illegal Uplo setting, %d\n", Uplo);
47  CBLAS_CallFromC = 0;
48  RowMajorStrg = 0;
49  return;
50  }
51  if (TransA == CblasNoTrans) TA = 'N';
52  else if (TransA == CblasTrans) TA = 'T';
53  else if (TransA == CblasConjTrans) TA = 'C';
54  else
55  {
56  cblas_xerbla(3, "cblas_ztbsv","Illegal TransA setting, %d\n", TransA);
57  CBLAS_CallFromC = 0;
58  RowMajorStrg = 0;
59  return;
60  }
61  if (Diag == CblasUnit) DI = 'U';
62  else if (Diag == CblasNonUnit) DI = 'N';
63  else
64  {
65  cblas_xerbla(4, "cblas_ztbsv","Illegal Diag setting, %d\n", Diag);
66  CBLAS_CallFromC = 0;
67  RowMajorStrg = 0;
68  return;
69  }
70  #ifdef F77_CHAR
71  F77_UL = C2F_CHAR(&UL);
72  F77_TA = C2F_CHAR(&TA);
73  F77_DI = C2F_CHAR(&DI);
74  #endif
75  F77_ztbsv( F77_UL, F77_TA, F77_DI, &F77_N, &F77_K, A, &F77_lda, X,
76  &F77_incX);
77  }
78  else if (layout == CblasRowMajor)
79  {
80  RowMajorStrg = 1;
81  if (Uplo == CblasUpper) UL = 'L';
82  else if (Uplo == CblasLower) UL = 'U';
83  else
84  {
85  cblas_xerbla(2, "cblas_ztbsv","Illegal Uplo setting, %d\n", Uplo);
86  CBLAS_CallFromC = 0;
87  RowMajorStrg = 0;
88  return;
89  }
90 
91  if (TransA == CblasNoTrans) TA = 'T';
92  else if (TransA == CblasTrans) TA = 'N';
93  else if (TransA == CblasConjTrans)
94  {
95  TA = 'N';
96  if ( N > 0)
97  {
98  if ( incX > 0 )
99  tincX = incX;
100  else
101  tincX = -incX;
102 
103  n = N*2*(tincX);
104 
105  x++;
106 
107  st=x+n;
108 
109  i = tincX << 1;
110  do
111  {
112  *x = -(*x);
113  x+=i;
114  }
115  while (x != st);
116  x -= n;
117  }
118  }
119  else
120  {
121  cblas_xerbla(3, "cblas_ztbsv","Illegal TransA setting, %d\n", TransA);
122  CBLAS_CallFromC = 0;
123  RowMajorStrg = 0;
124  return;
125  }
126 
127  if (Diag == CblasUnit) DI = 'U';
128  else if (Diag == CblasNonUnit) DI = 'N';
129  else
130  {
131  cblas_xerbla(4, "cblas_ztbsv","Illegal Diag setting, %d\n", Diag);
132  CBLAS_CallFromC = 0;
133  RowMajorStrg = 0;
134  return;
135  }
136  #ifdef F77_CHAR
137  F77_UL = C2F_CHAR(&UL);
138  F77_TA = C2F_CHAR(&TA);
139  F77_DI = C2F_CHAR(&DI);
140  #endif
141 
142  F77_ztbsv( F77_UL, F77_TA, F77_DI, &F77_N, &F77_K, A, &F77_lda, X,
143  &F77_incX);
144 
145  if (TransA == CblasConjTrans)
146  {
147  if (N > 0)
148  {
149  do
150  {
151  *x = -(*x);
152  x+= i;
153  }
154  while (x != st);
155  }
156  }
157  }
158  else cblas_xerbla(1, "cblas_ztbsv", "Illegal layout setting, %d\n", layout);
159  CBLAS_CallFromC = 0;
160  RowMajorStrg = 0;
161  return;
162 }
int RowMajorStrg
Definition: cblas_globals.c:2
#define F77_N
#define F77_ztbsv
Definition: cblas_f77.h:156
#define F77_incX
#define F77_DI
#define F77_lda
#define F77_UL
#define F77_TA
#define F77_K
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
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