1 /*
2  * cblas_ztrmv.c
3  * The program is a C interface to ztrmv.
4  *
5  * Keita Teranishi  5/20/98
6  *
7  */
8 #include "cblas.h"
9 #include "cblas_f77.h"
cblas_ztrmv(const enum CBLAS_ORDER order,const enum CBLAS_UPLO Uplo,const enum CBLAS_TRANSPOSE TransA,const enum CBLAS_DIAG Diag,const int N,const void * A,const int lda,void * X,const int incX)10 void cblas_ztrmv(const enum CBLAS_ORDER order, const enum CBLAS_UPLO Uplo,
11                  const enum CBLAS_TRANSPOSE TransA, const enum CBLAS_DIAG Diag,
12                  const int N, const void  *A, const int lda,
13                  void  *X, const int incX)
14 
15 {
16    char TA;
17    char UL;
18    char DI;
19 #ifdef F77_CHAR
20    F77_CHAR F77_TA, F77_UL, F77_DI;
21 #else
22    #define F77_TA &TA
23    #define F77_UL &UL
24    #define F77_DI &DI
25 #endif
26 #ifdef F77_INT
27    F77_INT F77_N=N, F77_lda=lda, F77_incX=incX;
28 #else
29    #define F77_N N
30    #define F77_lda lda
31    #define F77_incX incX
32 #endif
33    int n, i=0, tincX;
34    double *st=0,*x=(double *)X;
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_ztrmv","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_ztrmv","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_ztrmv","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_ztrmv( 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_ztrmv","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)
94       {
95          TA = 'N';
96          if ( N > 0)
97          {
98             if(incX > 0)
99                tincX = incX;
100             else
101                tincX = -incX;
102             i = tincX << 1;
103             n = i * N;
104             x++;
105             st = x + n;
106             do
107             {
108                *x = -(*x);
109                x += i;
110             }
111             while (x != st);
112             x -= n;
113          }
114       }
115       else
116       {
117          cblas_xerbla(3, "cblas_ztrmv","Illegal TransA setting, %d\n", TransA);
118          CBLAS_CallFromC = 0;
119          RowMajorStrg = 0;
120          return;
121       }
122 
123       if (Diag == CblasUnit) DI = 'U';
124       else if (Diag == CblasNonUnit) DI = 'N';
125       else
126       {
127          cblas_xerbla(4, "cblas_ztrmv","Illegal Diag setting, %d\n", Diag);
128          CBLAS_CallFromC = 0;
129          RowMajorStrg = 0;
130          return;
131       }
132       #ifdef F77_CHAR
133          F77_UL = C2F_CHAR(&UL);
134          F77_TA = C2F_CHAR(&TA);
135          F77_DI = C2F_CHAR(&DI);
136       #endif
137          F77_ztrmv( F77_UL, F77_TA, F77_DI, &F77_N, A, &F77_lda, X,
138                       &F77_incX);
139       if (TransA == CblasConjTrans)
140       {
141          if (N > 0)
142          {
143             do
144             {
145                *x = -(*x);
146                x += i;
147             }
148             while (x != st);
149          }
150       }
151    }
152    else cblas_xerbla(1, "cblas_ztrmv", "Illegal Order setting, %d\n", order);
153    CBLAS_CallFromC = 0;
154    RowMajorStrg = 0;
155    return;
156 }
157