LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
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◆ cblas_chemv()

void cblas_chemv ( CBLAS_LAYOUT  layout,
CBLAS_UPLO  Uplo,
const CBLAS_INT  N,
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 at line 12 of file cblas_chemv.c.

17{
18 char UL;
19#ifdef F77_CHAR
20 F77_CHAR F77_UL;
21#else
22 #define F77_UL &UL
23#endif
24#ifdef F77_INT
25 F77_INT F77_N=N, F77_lda=lda, F77_incX=incX, F77_incY=incY;
26#else
27 #define F77_N N
28 #define F77_lda lda
29 #define F77_incX incx
30 #define F77_incY incY
31#endif
32 CBLAS_INT n=0, i=0, incx=incX;
33 const float *xx= (float *)X, *alp= (float *)alpha, *bet = (float *)beta;
34 float ALPHA[2],BETA[2];
35 CBLAS_INT tincY, tincx;
36 float *x=(float *)X, *y=(float *)Y, *st=0, *tx;
37 extern int CBLAS_CallFromC;
38 extern int RowMajorStrg;
39 RowMajorStrg = 0;
40
41
43 if (layout == CblasColMajor)
44 {
45 if (Uplo == CblasUpper) UL = 'U';
46 else if (Uplo == CblasLower) UL = 'L';
47 else
48 {
49 cblas_xerbla(2, "cblas_chemv","Illegal Uplo setting, %d\n",Uplo );
51 RowMajorStrg = 0;
52 return;
53 }
54 #ifdef F77_CHAR
55 F77_UL = C2F_CHAR(&UL);
56 #endif
57 F77_chemv(F77_UL, &F77_N, alpha, A, &F77_lda, X, &F77_incX,
58 beta, Y, &F77_incY);
59 }
60 else if (layout == CblasRowMajor)
61 {
62 RowMajorStrg = 1;
63 ALPHA[0]= *alp;
64 ALPHA[1]= -alp[1];
65 BETA[0]= *bet;
66 BETA[1]= -bet[1];
67
68 if (N > 0)
69 {
70 n = N << 1;
71 x = malloc(n*sizeof(float));
72
73 tx = x;
74 if( incX > 0 ) {
75 i = incX << 1 ;
76 tincx = 2;
77 st= x+n;
78 } else {
79 i = incX *(-2);
80 tincx = -2;
81 st = x-2;
82 x +=(n-2);
83 }
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
96 #ifdef F77_INT
97 F77_incX = 1;
98 #else
99 incx = 1;
100 #endif
101
102 if(incY > 0)
103 tincY = incY;
104 else
105 tincY = -incY;
106 y++;
107
108 i = tincY << 1;
109 n = i * N ;
110 st = y + n;
111 do {
112 *y = -(*y);
113 y += i;
114 } while(y != st);
115 y -= n;
116 } else
117 x = (float *) X;
118
119
120 if (Uplo == CblasUpper) UL = 'L';
121 else if (Uplo == CblasLower) UL = 'U';
122 else
123 {
124 cblas_xerbla(2, "cblas_chemv","Illegal Uplo setting, %d\n", Uplo);
125 CBLAS_CallFromC = 0;
126 RowMajorStrg = 0;
127 return;
128 }
129 #ifdef F77_CHAR
130 F77_UL = C2F_CHAR(&UL);
131 #endif
132 F77_chemv(F77_UL, &F77_N, ALPHA, A, &F77_lda, x, &F77_incX,
133 BETA, Y, &F77_incY);
134 }
135 else
136 {
137 cblas_xerbla(1, "cblas_chemv","Illegal layout setting, %d\n", layout);
138 CBLAS_CallFromC = 0;
139 RowMajorStrg = 0;
140 return;
141 }
142 if ( layout == CblasRowMajor )
143 {
144 RowMajorStrg = 1;
145 if ( X != x )
146 free(x);
147 if (N > 0)
148 {
149 do
150 {
151 *y = -(*y);
152 y += i;
153 }
154 while (y != st);
155 }
156 }
157 CBLAS_CallFromC = 0;
158 RowMajorStrg = 0;
159 return;
160}
@ CblasLower
Definition: cblas.h:41
@ CblasUpper
Definition: cblas.h:41
void cblas_xerbla(CBLAS_INT p, const char *rout, const char *form,...)
Definition: cblas_xerbla.c:12
@ CblasColMajor
Definition: cblas.h:39
@ CblasRowMajor
Definition: cblas.h:39
#define CBLAS_INT
Definition: cblas.h:24
#define F77_incX
#define F77_incY
#define F77_N
#define F77_lda
#define F77_UL
#define F77_chemv(...)
Definition: cblas_f77.h:335
#define F77_INT
Definition: cblas_f77.h:32
int CBLAS_CallFromC
Definition: cblas_globals.c:1
int RowMajorStrg
Definition: cblas_globals.c:2
#define N
Definition: example_user.c:10
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