001: /*
002:  *
003:  * cblas_dtrsm.c
004:  * This program is a C interface to dtrsm.
005:  * Written by Keita Teranishi
006:  * 4/6/1998
007:  *
008:  */
009: 
010: #include "cblas.h"
011: #include "cblas_f77.h"
012: void cblas_dtrsm(const enum CBLAS_ORDER Order, const enum CBLAS_SIDE Side,
013:                  const enum CBLAS_UPLO Uplo, const enum CBLAS_TRANSPOSE TransA,
014:                  const enum CBLAS_DIAG Diag, const int M, const int N,
015:                  const double alpha, const double  *A, const int lda,
016:                  double  *B, const int ldb)
017: 
018: {
019:    char UL, TA, SD, DI;
020: #ifdef F77_CHAR
021:    F77_CHAR F77_TA, F77_UL, F77_SD, F77_DI;
022: #else
023:    #define F77_TA &TA
024:    #define F77_UL &UL
025:    #define F77_SD &SD
026:    #define F77_DI &DI
027: #endif
028: 
029: #ifdef F77_INT
030:    F77_INT F77_M=M, F77_N=N, F77_lda=lda, F77_ldb=ldb;
031: #else
032:    #define F77_M M
033:    #define F77_N N
034:    #define F77_lda lda
035:    #define F77_ldb ldb
036: #endif
037: 
038:    extern int CBLAS_CallFromC;
039:    extern int RowMajorStrg;
040:    RowMajorStrg = 0;
041:    CBLAS_CallFromC = 1;
042: 
043:    if( Order == CblasColMajor )
044:    {
045:       if      ( Side == CblasRight) SD='R';
046:       else if ( Side == CblasLeft ) SD='L';
047:       else
048:       {
049:          cblas_xerbla(2, "cblas_dtrsm","Illegal Side setting, %d\n", Side);
050:          CBLAS_CallFromC = 0;
051:          RowMajorStrg = 0;
052:          return;
053:       }
054:       if      ( Uplo == CblasUpper) UL='U';
055:       else if ( Uplo == CblasLower) UL='L';
056:       else
057:       {
058:          cblas_xerbla(3, "cblas_dtrsm","Illegal Uplo setting, %d\n", Uplo);
059:          CBLAS_CallFromC = 0;
060:          RowMajorStrg = 0;
061:          return;
062:       }
063: 
064:       if      ( TransA == CblasTrans    ) TA='T';
065:       else if ( TransA == CblasConjTrans) TA='C';
066:       else if ( TransA == CblasNoTrans  ) TA='N';
067:       else
068:       {
069:          cblas_xerbla(4, "cblas_dtrsm","Illegal Trans setting, %d\n", TransA);
070:          CBLAS_CallFromC = 0;
071:          RowMajorStrg = 0;
072:          return;
073:       }
074: 
075:       if      ( Diag == CblasUnit   ) DI='U';
076:       else if ( Diag == CblasNonUnit) DI='N';
077:       else
078:       {
079:          cblas_xerbla(5, "cblas_dtrsm","Illegal Diag setting, %d\n", Diag);
080:          CBLAS_CallFromC = 0;
081:          RowMajorStrg = 0;
082:          return;
083:       }
084: 
085:       #ifdef F77_CHAR
086:          F77_UL = C2F_CHAR(&UL);
087:          F77_TA = C2F_CHAR(&TA);
088:          F77_SD = C2F_CHAR(&SD);
089:          F77_DI = C2F_CHAR(&DI);
090:       #endif
091: 
092:       F77_dtrsm(F77_SD, F77_UL, F77_TA, F77_DI, &F77_M, &F77_N, &alpha,
093:                 A, &F77_lda, B, &F77_ldb);
094:    }
095:    else if (Order == CblasRowMajor)
096:    {
097:       RowMajorStrg = 1;
098:       if      ( Side == CblasRight) SD='L';
099:       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: