LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
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cblas_cgbmv.c
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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"
12void cblas_cgbmv(const CBLAS_LAYOUT layout,
13 const CBLAS_TRANSPOSE TransA, const CBLAS_INT M, const CBLAS_INT N,
14 const CBLAS_INT KL, const CBLAS_INT KU,
15 const void *alpha, const void *A, const CBLAS_INT lda,
16 const void *X, const CBLAS_INT incX, const void *beta,
17 void *Y, const CBLAS_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 CBLAS_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 CBLAS_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
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_cgbmv","Illegal TransA setting, %d\n", TransA);
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 (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(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 layout setting, %d\n", layout);
163 CBLAS_CallFromC = 0;
164 RowMajorStrg = 0;
165}
void cblas_xerbla(CBLAS_INT p, const char *rout, const char *form,...)
Definition: cblas_xerbla.c:12
CBLAS_TRANSPOSE
Definition: cblas.h:40
@ CblasNoTrans
Definition: cblas.h:40
@ CblasTrans
Definition: cblas.h:40
@ CblasConjTrans
Definition: cblas.h:40
CBLAS_LAYOUT
Definition: cblas.h:39
@ CblasColMajor
Definition: cblas.h:39
@ CblasRowMajor
Definition: cblas.h:39
#define CBLAS_INT
Definition: cblas.h:24
#define F77_incX
#define F77_KU
#define F77_incY
#define F77_TA
#define F77_N
#define F77_lda
void cblas_cgbmv(const CBLAS_LAYOUT layout, const CBLAS_TRANSPOSE TransA, const CBLAS_INT M, const CBLAS_INT N, const CBLAS_INT KL, const CBLAS_INT KU, const void *alpha, const void *A, const CBLAS_INT lda, const void *X, const CBLAS_INT incX, const void *beta, void *Y, const CBLAS_INT incY)
Definition: cblas_cgbmv.c:12
#define F77_M
#define F77_KL
#define F77_INT
Definition: cblas_f77.h:32
#define F77_cgbmv(...)
Definition: cblas_f77.h:334
int CBLAS_CallFromC
Definition: cblas_globals.c:1
int RowMajorStrg
Definition: cblas_globals.c:2
#define N
Definition: example_user.c:10