1 /*
2  *
3  * cblas_dtrmv.c
4  * This program is a C interface to sgemv.
5  * Written by Keita Teranishi
6  * 4/6/1998
7  *
8  */
9 
10 #include "cblas.h"
11 #include "cblas_f77.h"
cblas_dtrmv(const enum CBLAS_ORDER order,const enum CBLAS_UPLO Uplo,const enum CBLAS_TRANSPOSE TransA,const enum CBLAS_DIAG Diag,const int N,const double * A,const int lda,double * X,const int incX)12 void cblas_dtrmv(const enum CBLAS_ORDER order, const enum CBLAS_UPLO Uplo,
13                  const enum CBLAS_TRANSPOSE TransA, const enum CBLAS_DIAG Diag,
14                  const int N, const double  *A, const int lda,
15                  double  *X, const int incX)
16 
17 {
18    char TA;
19    char UL;
20    char DI;
21 #ifdef F77_CHAR
22    F77_CHAR F77_TA, F77_UL, F77_DI;
23 #else
24    #define F77_TA &TA
25    #define F77_UL &UL
26    #define F77_DI &DI
27 #endif
28 #ifdef F77_INT
29    F77_INT F77_N=N, F77_lda=lda, F77_incX=incX;
30 #else
31    #define F77_N N
32    #define F77_lda lda
33    #define F77_incX incX
34 #endif
35    extern int CBLAS_CallFromC;
36    extern int RowMajorStrg;
37    RowMajorStrg = 0;
38 
39    CBLAS_CallFromC = 1;
40    if (order == CblasColMajor)
41    {
42       if (Uplo == CblasUpper) UL = 'U';
43       else if (Uplo == CblasLower) UL = 'L';
44       else
45       {
46          cblas_xerbla(2, "cblas_dtrmv","Illegal Uplo setting, %d\n", Uplo);
47          CBLAS_CallFromC = 0;
48          RowMajorStrg = 0;
49          return;
50       }
51       if (TransA == CblasNoTrans) TA = 'N';
52       else if (TransA == CblasTrans) TA = 'T';
53       else if (TransA == CblasConjTrans) TA = 'C';
54       else
55       {
56          cblas_xerbla(3, "cblas_dtrmv","Illegal TransA setting, %d\n", TransA);
57          CBLAS_CallFromC = 0;
58          RowMajorStrg = 0;
59          return;
60       }
61       if (Diag == CblasUnit) DI = 'U';
62       else if (Diag == CblasNonUnit) DI = 'N';
63       else
64       {
65          cblas_xerbla(4, "cblas_dtrmv","Illegal Diag setting, %d\n", Diag);
66          CBLAS_CallFromC = 0;
67          RowMajorStrg = 0;
68          return;
69       }
70       #ifdef F77_CHAR
71          F77_UL = C2F_CHAR(&UL);
72          F77_TA = C2F_CHAR(&TA);
73          F77_DI = C2F_CHAR(&DI);
74       #endif
75       F77_dtrmv( F77_UL, F77_TA, F77_DI, &F77_N, A, &F77_lda, X,
76                       &F77_incX);
77    }
78    else if (order == CblasRowMajor)
79    {
80       RowMajorStrg = 1;
81       if (Uplo == CblasUpper) UL = 'L';
82       else if (Uplo == CblasLower) UL = 'U';
83       else
84       {
85          cblas_xerbla(2, "cblas_dtrmv","Illegal Uplo setting, %d\n", Uplo);
86          CBLAS_CallFromC = 0;
87          RowMajorStrg = 0;
88          return;
89       }
90 
91       if (TransA == CblasNoTrans) TA = 'T';
92       else if (TransA == CblasTrans) TA = 'N';
93       else if (TransA == CblasConjTrans) TA = 'N';
94       else
95       {
96          cblas_xerbla(3, "cblas_dtrmv","Illegal TransA setting, %d\n", TransA);
97          CBLAS_CallFromC = 0;
98          RowMajorStrg = 0;
99          return;
100       }
101 
102       if (Diag == CblasUnit) DI = 'U';
103       else if (Diag == CblasNonUnit) DI = 'N';
104       else
105       {
106          cblas_xerbla(4, "cblas_dtrmv","Illegal Diag setting, %d\n", Diag);
107          CBLAS_CallFromC = 0;
108          RowMajorStrg = 0;
109          return;
110       }
111       #ifdef F77_CHAR
112          F77_UL = C2F_CHAR(&UL);
113          F77_TA = C2F_CHAR(&TA);
114          F77_DI = C2F_CHAR(&DI);
115       #endif
116       F77_dtrmv( F77_UL, F77_TA, F77_DI, &F77_N, A, &F77_lda, X,
117                       &F77_incX);
118    } else cblas_xerbla(1, "cblas_dtrmv", "Illegal order setting, %d\n", order);
119    CBLAS_CallFromC = 0;
120    RowMajorStrg = 0;
121    return;
122 }
123