LAPACK  3.11.0
LAPACK: Linear Algebra PACKage
cblas_dtrsm.c
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"
12 void cblas_dtrsm(const CBLAS_LAYOUT layout, const CBLAS_SIDE Side,
13  const CBLAS_UPLO Uplo, const CBLAS_TRANSPOSE TransA,
14  const CBLAS_DIAG Diag, const CBLAS_INT M, const CBLAS_INT N,
15  const double alpha, const double *A, const CBLAS_INT lda,
16  double *B, const CBLAS_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( layout == 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 (layout == 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 layout setting, %d\n", layout);
150  CBLAS_CallFromC = 0;
151  RowMajorStrg = 0;
152  return;
153 }