001: /*
002:  * cblas_ctrmv.c
003:  * The program is a C interface to ctrmv.
004:  *
005:  * Keita Teranishi  3/23/98
006:  *
007:  */
008: #include "cblas.h"
009: #include "cblas_f77.h"
010: void cblas_ctrmv(const enum CBLAS_ORDER order, const enum CBLAS_UPLO Uplo,
011:                  const enum CBLAS_TRANSPOSE TransA, const enum CBLAS_DIAG Diag,
012:                  const int N, const void  *A, const int lda,
013:                  void  *X, const int incX)
014: 
015: {
016:    char TA;
017:    char UL;
018:    char DI;
019: #ifdef F77_CHAR
020:    F77_CHAR F77_TA, F77_UL, F77_DI;
021: #else
022:    #define F77_TA &TA
023:    #define F77_UL &UL
024:    #define F77_DI &DI
025: #endif
026: #ifdef F77_INT
027:    F77_INT F77_N=N, F77_lda=lda, F77_incX=incX;
028: #else
029:    #define F77_N N
030:    #define F77_lda lda
031:    #define F77_incX incX
032: #endif
033:    int n, i=0, tincX;
034:    float *st=0,*x=(float *)X;
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_ctrmv","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_ctrmv","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_ctrmv","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_ctrmv( 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_ctrmv","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)
094:       {
095:          TA = 'N';
096:          if ( N > 0)
097:          {
098:             if(incX > 0)
099:                tincX = incX;
100:             else
101:                tincX = -incX;
102:             i = tincX << 1;
103:             n = i * N;
104:             st = x + n;
105:             do
106:             {
107:                x[1] = -x[1];
108:                x+= i;
109:             }
110:             while (x != st);
111:             x -= n;
112:          }
113:       }
114:       else
115:       {
116:          cblas_xerbla(3, "cblas_ctrmv","Illegal TransA setting, %d\n", TransA);
117:          CBLAS_CallFromC = 0;
118:          RowMajorStrg = 0;
119:          return;
120:       }
121: 
122:       if (Diag == CblasUnit) DI = 'U';
123:       else if (Diag == CblasNonUnit) DI = 'N';
124:       else
125:       {
126:          cblas_xerbla(4, "cblas_ctrmv","Illegal Diag setting, %d\n", Diag);
127:          CBLAS_CallFromC = 0;
128:          RowMajorStrg = 0;
129:          return;
130:       }
131:       #ifdef F77_CHAR
132:          F77_UL = C2F_CHAR(&UL);
133:          F77_TA = C2F_CHAR(&TA);
134:          F77_DI = C2F_CHAR(&DI);
135:       #endif
136:          F77_ctrmv( F77_UL, F77_TA, F77_DI, &F77_N, A, &F77_lda, X,
137:                       &F77_incX);
138:       if (TransA == CblasConjTrans)
139:       {
140:          if (N > 0)
141:          {
142:             do
143:             {
144:                x[1] = -x[1];
145:                x += i;
146:             }
147:             while (x != st);
148:          }
149:       }
150:    }
151:    else cblas_xerbla(1, "cblas_ctrmv", "Illegal Order setting, %d\n", order);
152:    CBLAS_CallFromC = 0;
153:    RowMajorStrg = 0;
154:    return;
155: }
156: