001: /*
002:  *
003:  * cblas_dtrmv.c
004:  * This program is a C interface to sgemv.
005:  * Written by Keita Teranishi
006:  * 4/6/1998
007:  *
008:  */
009: 
010: #include "cblas.h"
011: #include "cblas_f77.h"
012: void cblas_dtrmv(const enum CBLAS_ORDER order, const enum CBLAS_UPLO Uplo,
013:                  const enum CBLAS_TRANSPOSE TransA, const enum CBLAS_DIAG Diag,
014:                  const int N, const double  *A, const int lda,
015:                  double  *X, const int incX)
016: 
017: {
018:    char TA;
019:    char UL;
020:    char DI;
021: #ifdef F77_CHAR
022:    F77_CHAR F77_TA, F77_UL, F77_DI;
023: #else
024:    #define F77_TA &TA
025:    #define F77_UL &UL
026:    #define F77_DI &DI
027: #endif
028: #ifdef F77_INT
029:    F77_INT F77_N=N, F77_lda=lda, F77_incX=incX;
030: #else
031:    #define F77_N N
032:    #define F77_lda lda
033:    #define F77_incX incX
034: #endif
035:    extern int CBLAS_CallFromC;
036:    extern int RowMajorStrg;
037:    RowMajorStrg = 0;
038: 
039:    CBLAS_CallFromC = 1;
040:    if (order == CblasColMajor)
041:    {
042:       if (Uplo == CblasUpper) UL = 'U';
043:       else if (Uplo == CblasLower) UL = 'L';
044:       else
045:       {
046:          cblas_xerbla(2, "cblas_dtrmv","Illegal Uplo setting, %d\n", Uplo);
047:          CBLAS_CallFromC = 0;
048:          RowMajorStrg = 0;
049:          return;
050:       }
051:       if (TransA == CblasNoTrans) TA = 'N';
052:       else if (TransA == CblasTrans) TA = 'T';
053:       else if (TransA == CblasConjTrans) TA = 'C';
054:       else
055:       {
056:          cblas_xerbla(3, "cblas_dtrmv","Illegal TransA setting, %d\n", TransA);
057:          CBLAS_CallFromC = 0;
058:          RowMajorStrg = 0;
059:          return;
060:       }
061:       if (Diag == CblasUnit) DI = 'U';
062:       else if (Diag == CblasNonUnit) DI = 'N';
063:       else
064:       {
065:          cblas_xerbla(4, "cblas_dtrmv","Illegal Diag setting, %d\n", Diag);
066:          CBLAS_CallFromC = 0;
067:          RowMajorStrg = 0;
068:          return;
069:       }
070:       #ifdef F77_CHAR
071:          F77_UL = C2F_CHAR(&UL);
072:          F77_TA = C2F_CHAR(&TA);
073:          F77_DI = C2F_CHAR(&DI);
074:       #endif
075:       F77_dtrmv( F77_UL, F77_TA, F77_DI, &F77_N, A, &F77_lda, X,
076:                       &F77_incX);
077:    }
078:    else if (order == CblasRowMajor)
079:    {
080:       RowMajorStrg = 1;
081:       if (Uplo == CblasUpper) UL = 'L';
082:       else if (Uplo == CblasLower) UL = 'U';
083:       else
084:       {
085:          cblas_xerbla(2, "cblas_dtrmv","Illegal Uplo setting, %d\n", Uplo);
086:          CBLAS_CallFromC = 0;
087:          RowMajorStrg = 0;
088:          return;
089:       }
090: 
091:       if (TransA == CblasNoTrans) TA = 'T';
092:       else if (TransA == CblasTrans) TA = 'N';
093:       else if (TransA == CblasConjTrans) TA = 'N';
094:       else
095:       {
096:          cblas_xerbla(3, "cblas_dtrmv","Illegal TransA setting, %d\n", TransA);
097:          CBLAS_CallFromC = 0;
098:          RowMajorStrg = 0;
099:          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: