1 /*
2  *
3  * cblas_dtrsm.c
4  * This program is a C interface to dtrsm.
5  * Written by Keita Teranishi
6  * 4/6/1998
7  *
8  */
9 
10 #include "cblas.h"
11 #include "cblas_f77.h"
cblas_dtrsm(const enum CBLAS_ORDER Order,const enum CBLAS_SIDE Side,const enum CBLAS_UPLO Uplo,const enum CBLAS_TRANSPOSE TransA,const enum CBLAS_DIAG Diag,const int M,const int N,const double alpha,const double * A,const int lda,double * B,const int ldb)12 void cblas_dtrsm(const enum CBLAS_ORDER Order, const enum CBLAS_SIDE Side,
13                  const enum CBLAS_UPLO Uplo, const enum CBLAS_TRANSPOSE TransA,
14                  const enum CBLAS_DIAG Diag, const int M, const int N,
15                  const double alpha, const double  *A, const int lda,
16                  double  *B, const int ldb)
17 
18 {
19    char UL, TA, SD, DI;
20 #ifdef F77_CHAR
21    F77_CHAR F77_TA, F77_UL, F77_SD, F77_DI;
22 #else
23    #define F77_TA &TA
24    #define F77_UL &UL
25    #define F77_SD &SD
26    #define F77_DI &DI
27 #endif
28 
29 #ifdef F77_INT
30    F77_INT F77_M=M, F77_N=N, F77_lda=lda, F77_ldb=ldb;
31 #else
32    #define F77_M M
33    #define F77_N N
34    #define F77_lda lda
35    #define F77_ldb ldb
36 #endif
37 
38    extern int CBLAS_CallFromC;
39    extern int RowMajorStrg;
40    RowMajorStrg = 0;
41    CBLAS_CallFromC = 1;
42 
43    if( Order == CblasColMajor )
44    {
45       if      ( Side == CblasRight) SD='R';
46       else if ( Side == CblasLeft ) SD='L';
47       else
48       {
49          cblas_xerbla(2, "cblas_dtrsm","Illegal Side setting, %d\n", Side);
50          CBLAS_CallFromC = 0;
51          RowMajorStrg = 0;
52          return;
53       }
54       if      ( Uplo == CblasUpper) UL='U';
55       else if ( Uplo == CblasLower) UL='L';
56       else
57       {
58          cblas_xerbla(3, "cblas_dtrsm","Illegal Uplo setting, %d\n", Uplo);
59          CBLAS_CallFromC = 0;
60          RowMajorStrg = 0;
61          return;
62       }
63 
64       if      ( TransA == CblasTrans    ) TA='T';
65       else if ( TransA == CblasConjTrans) TA='C';
66       else if ( TransA == CblasNoTrans  ) TA='N';
67       else
68       {
69          cblas_xerbla(4, "cblas_dtrsm","Illegal Trans setting, %d\n", TransA);
70          CBLAS_CallFromC = 0;
71          RowMajorStrg = 0;
72          return;
73       }
74 
75       if      ( Diag == CblasUnit   ) DI='U';
76       else if ( Diag == CblasNonUnit) DI='N';
77       else
78       {
79          cblas_xerbla(5, "cblas_dtrsm","Illegal Diag setting, %d\n", Diag);
80          CBLAS_CallFromC = 0;
81          RowMajorStrg = 0;
82          return;
83       }
84 
85       #ifdef F77_CHAR
86          F77_UL = C2F_CHAR(&UL);
87          F77_TA = C2F_CHAR(&TA);
88          F77_SD = C2F_CHAR(&SD);
89          F77_DI = C2F_CHAR(&DI);
90       #endif
91 
92       F77_dtrsm(F77_SD, F77_UL, F77_TA, F77_DI, &F77_M, &F77_N, &alpha,
93                 A, &F77_lda, B, &F77_ldb);
94    }
95    else if (Order == CblasRowMajor)
96    {
97       RowMajorStrg = 1;
98       if      ( Side == CblasRight) SD='L';
99       else if ( Side == CblasLeft ) SD='R';
100       else
101       {
102          cblas_xerbla(2, "cblas_dtrsm","Illegal Side setting, %d\n", Side);
103          CBLAS_CallFromC = 0;
104          RowMajorStrg = 0;
105          return;
106       }
107 
108       if      ( Uplo == CblasUpper) UL='L';
109       else if ( Uplo == CblasLower) UL='U';
110       else
111       {
112          cblas_xerbla(3, "cblas_dtrsm","Illegal Uplo setting, %d\n", Uplo);
113          CBLAS_CallFromC = 0;
114          RowMajorStrg = 0;
115          return;
116       }
117 
118       if      ( TransA == CblasTrans    ) TA='T';
119       else if ( TransA == CblasConjTrans) TA='C';
120       else if ( TransA == CblasNoTrans  ) TA='N';
121       else
122       {
123          cblas_xerbla(4, "cblas_dtrsm","Illegal Trans setting, %d\n", TransA);
124          CBLAS_CallFromC = 0;
125          RowMajorStrg = 0;
126          return;
127       }
128 
129       if      ( Diag == CblasUnit   ) DI='U';
130       else if ( Diag == CblasNonUnit) DI='N';
131       else
132       {
133          cblas_xerbla(5, "cblas_dtrsm","Illegal Diag setting, %d\n", Diag);
134          CBLAS_CallFromC = 0;
135          RowMajorStrg = 0;
136          return;
137       }
138 
139       #ifdef F77_CHAR
140          F77_UL = C2F_CHAR(&UL);
141          F77_TA = C2F_CHAR(&TA);
142          F77_SD = C2F_CHAR(&SD);
143          F77_DI = C2F_CHAR(&DI);
144       #endif
145 
146       F77_dtrsm(F77_SD, F77_UL, F77_TA, F77_DI, &F77_N, &F77_M, &alpha, A,
147                &F77_lda, B, &F77_ldb);
148    }
149    else cblas_xerbla(1, "cblas_dtrsm","Illegal Order setting, %d\n", Order);
150    CBLAS_CallFromC = 0;
151    RowMajorStrg = 0;
152    return;
153 }
154