01: /*
02:  *
03:  * cblas_dgemv.c
04:  * This program is a C interface to dgemv.
05:  * Written by Keita Teranishi
06:  * 4/6/1998
07:  *
08:  */
09: #include "cblas.h"
10: #include "cblas_f77.h"
11: void cblas_dgemv(const enum CBLAS_ORDER order,
12:                  const enum CBLAS_TRANSPOSE TransA, const int M, const int N,
13:                  const double alpha, const double  *A, const int lda,
14:                  const double  *X, const int incX, const double beta,
15:                  double  *Y, const int incY)
16: {
17:    char TA;
18: #ifdef F77_CHAR
19:    F77_CHAR F77_TA;
20: #else
21:    #define F77_TA &TA
22: #endif
23: #ifdef F77_INT
24:    F77_INT F77_M=M, F77_N=N, F77_lda=lda, F77_incX=incX, F77_incY=incY;
25: #else
26:    #define F77_M M
27:    #define F77_N N
28:    #define F77_lda lda
29:    #define F77_incX incX
30:    #define F77_incY incY
31: #endif
32:    extern int CBLAS_CallFromC;
33:    extern int RowMajorStrg;
34:    RowMajorStrg = 0;
35: 
36:    CBLAS_CallFromC = 1;
37:    if (order == CblasColMajor)
38:    {
39:       if (TransA == CblasNoTrans) TA = 'N';
40:       else if (TransA == CblasTrans) TA = 'T';
41:       else if (TransA == CblasConjTrans) TA = 'C';
42:       else
43:       {
44:          cblas_xerbla(2, "cblas_dgemv","Illegal TransA setting, %d\n", TransA);
45:          CBLAS_CallFromC = 0;
46:          RowMajorStrg = 0;
47:          return;
48:       }
49:       #ifdef F77_CHAR
50:          F77_TA = C2F_CHAR(&TA);
51:       #endif
52:       F77_dgemv(F77_TA, &F77_M, &F77_N, &alpha, A, &F77_lda, X, &F77_incX,
53:                 &beta, Y, &F77_incY);
54:    }
55:    else if (order == CblasRowMajor)
56:    {
57:       RowMajorStrg = 1;
58:       if (TransA == CblasNoTrans) TA = 'T';
59:       else if (TransA == CblasTrans) TA = 'N';
60:       else if (TransA == CblasConjTrans) TA = 'N';
61:       else
62:       {
63:          cblas_xerbla(2, "cblas_dgemv","Illegal TransA setting, %d\n", TransA);
64:          CBLAS_CallFromC = 0;
65:          RowMajorStrg = 0;
66:          return;
67:       }
68:       #ifdef F77_CHAR
69:          F77_TA = C2F_CHAR(&TA);
70:       #endif
71:       F77_dgemv(F77_TA, &F77_N, &F77_M, &alpha, A, &F77_lda, X,
72:                 &F77_incX, &beta, Y, &F77_incY);
73:    }
74:    else cblas_xerbla(1, "cblas_dgemv", "Illegal Order setting, %d\n", order);
75:    CBLAS_CallFromC = 0;
76:    RowMajorStrg = 0;
77:    return;
78: }
79: