v0.9.0
cblas_cgbmv.c
Go to the documentation of this file.
1 /*
2  * cblas_cgbmv.c
3  * The program is a C interface of cgbmv
4  *
5  * Keita Teranishi 5/20/98
6  *
7  */
8 #include <stdio.h>
9 #include <stdlib.h>
10 #include "cblas.h"
11 #include "cblas_f77.h"
12 void cblas_cgbmv(const enum CBLAS_ORDER order,
13  const enum CBLAS_TRANSPOSE TransA, const int M, const int N,
14  const int KL, const int KU,
15  const void *alpha, const void *A, const int lda,
16  const void *X, const int incX, const void *beta,
17  void *Y, const int incY)
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=0, i=0, incx=incX;
38  const float *xx= (float *)X, *alp= (float *)alpha, *bet = (float *)beta;
39  float ALPHA[2],BETA[2];
40  int tincY, tincx;
41  float *x=(float *)X, *y=(float *)Y, *st=0, *tx=0;
42  extern int CBLAS_CallFromC;
43  extern int RowMajorStrg;
44  RowMajorStrg = 0;
45 
46  CBLAS_CallFromC = 1;
47  if (order == 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_cgbmv","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_cgbmv(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 (order == 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(float));
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 = (float *) X;
129 
130 
131  }
132  else
133  {
134  cblas_xerbla(2, "cblas_cgbmv","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_cgbmv(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_cgbmv(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_cgbmv", "Illegal Order setting, %d\n", order);
163  CBLAS_CallFromC = 0;
164  RowMajorStrg = 0;
165 }
#define F77_lda
#define F77_KL
#define F77_KU
#define F77_M
CBLAS_TRANSPOSE
Definition: cblas.h:11
#define F77_TA
int CBLAS_CallFromC
Definition: cblas_globals.c:1
void F77_cgbmv(FCHAR, FINT, FINT, FINT, FINT, const void *, const void *, FINT, const void *, FINT, const void *, void *, FINT)
#define F77_incX
CBLAS_ORDER
Definition: cblas.h:10
#define F77_N
void cblas_xerbla(int p, const char *rout, const char *form,...)
Definition: cblas_xerbla.c:8
void cblas_cgbmv(const enum CBLAS_ORDER order, const enum 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: cblas_cgbmv.c:12
#define F77_incY
const int N
Definition: speed_test.cpp:3
int RowMajorStrg
Definition: cblas_globals.c:2