1 /*
2 * cblas_chpmv.c
3 * The program is a C interface of chpmv
4 *
5 * Keita Teranishi 5/18/98
6 *
7 */
8 #include <stdio.h>
9 #include <stdlib.h>
10 #include "cblas.h"
11 #include "cblas_f77.h"
cblas_chpmv(const CBLAS_LAYOUT layout,const CBLAS_UPLO Uplo,const CBLAS_INDEX N,const void * alpha,const void * AP,const void * X,const CBLAS_INDEX incX,const void * beta,void * Y,const CBLAS_INDEX incY)12 void cblas_chpmv(const CBLAS_LAYOUT layout,
13 const CBLAS_UPLO Uplo,const CBLAS_INDEX N,
14 const void *alpha, const void *AP,
15 const void *X, const CBLAS_INDEX incX, const void *beta,
16 void *Y, const CBLAS_INDEX incY)
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_incX=incX, F77_incY=incY;
26 #else
27 #define F77_N N
28 #define F77_incX incx
29 #define F77_incY incY
30 #endif
31 CBLAS_INDEX n, i=0, incx=incX;
32 const float *xx= (float *)X, *alp= (float *)alpha, *bet = (float *)beta;
33 float ALPHA[2],BETA[2];
34 CBLAS_INDEX tincY, tincx;
35 float *x=(float *)X, *y=(float *)Y, *st=0, *tx;
36 extern int CBLAS_CallFromC;
37 extern int RowMajorStrg;
38 RowMajorStrg = 0;
39
40 CBLAS_CallFromC = 1;
41 if (layout == CblasColMajor)
42 {
43 if (Uplo == CblasLower) UL = 'L';
44 else if (Uplo == CblasUpper) UL = 'U';
45 else
46 {
47 cblas_xerbla(2, "cblas_chpmv","Illegal Uplo setting, %d\n",Uplo );
48 CBLAS_CallFromC = 0;
49 RowMajorStrg = 0;
50 return;
51 }
52 #ifdef F77_CHAR
53 F77_UL = C2F_CHAR(&UL);
54 #endif
55 F77_chpmv(F77_UL, &F77_N, alpha, AP, X,
56 &F77_incX, beta, Y, &F77_incY);
57 }
58 else if (layout == CblasRowMajor)
59 {
60 RowMajorStrg = 1;
61 ALPHA[0]= *alp;
62 ALPHA[1]= -alp[1];
63 BETA[0]= *bet;
64 BETA[1]= -bet[1];
65
66 if (N > 0)
67 {
68 n = N << 1;
69 x = malloc(n*sizeof(float));
70
71 tx = x;
72 if( incX > 0 ) {
73 i = incX << 1;
74 tincx = 2;
75 st= x+n;
76 } else {
77 i = incX *(-2);
78 tincx = -2;
79 st = x-2;
80 x +=(n-2);
81 }
82
83 do
84 {
85 *x = *xx;
86 x[1] = -xx[1];
87 x += tincx ;
88 xx += i;
89 }
90 while (x != st);
91 x=tx;
92
93
94 #ifdef F77_INT
95 F77_incX = 1;
96 #else
97 incx = 1;
98 #endif
99
100 if(incY > 0)
101 tincY = incY;
102 else
103 tincY = -incY;
104 y++;
105
106 i = tincY << 1;
107 n = i * N ;
108 st = y + n;
109 do {
110 *y = -(*y);
111 y += i;
112 } while(y != st);
113 y -= n;
114 } else
115 x = (float *) X;
116
117
118 if (Uplo == CblasUpper) UL = 'L';
119 else if (Uplo == CblasLower) UL = 'U';
120 else
121 {
122 cblas_xerbla(2, "cblas_chpmv","Illegal Uplo setting, %d\n", Uplo );
123 CBLAS_CallFromC = 0;
124 RowMajorStrg = 0;
125 return;
126 }
127 #ifdef F77_CHAR
128 F77_UL = C2F_CHAR(&UL);
129 #endif
130
131 F77_chpmv(F77_UL, &F77_N, ALPHA,
132 AP, x, &F77_incX, BETA, Y, &F77_incY);
133 }
134 else
135 {
136 cblas_xerbla(1, "cblas_chpmv","Illegal layout setting, %d\n", layout);
137 CBLAS_CallFromC = 0;
138 RowMajorStrg = 0;
139 return;
140 }
141 if ( layout == CblasRowMajor )
142 {
143 RowMajorStrg = 1;
144 if(X!=x)
145 free(x);
146 if (N > 0)
147 {
148 do
149 {
150 *y = -(*y);
151 y += i;
152 }
153 while (y != st);
154 }
155 }
156
157 CBLAS_CallFromC = 0;
158 RowMajorStrg = 0;
159 return;
160 }
161