001: /*
002:  *
003:  * cblas_sgemm.c
004:  * This program is a C interface to sgemm.
005:  * Written by Keita Teranishi
006:  * 4/8/1998
007:  *
008:  */
009: 
010: #include "cblas.h"
011: #include "cblas_f77.h"
012: void cblas_sgemm(const enum CBLAS_ORDER Order, const enum CBLAS_TRANSPOSE TransA,
013:                  const enum CBLAS_TRANSPOSE TransB, const int M, const int N,
014:                  const int K, const float alpha, const float  *A,
015:                  const int lda, const float  *B, const int ldb,
016:                  const float beta, float  *C, const int ldc)
017: {
018:    char TA, TB;
019: #ifdef F77_CHAR
020:    F77_CHAR F77_TA, F77_TB;
021: #else
022:    #define F77_TA &TA
023:    #define F77_TB &TB
024: #endif
025: 
026: #ifdef F77_INT
027:    F77_INT F77_M=M, F77_N=N, F77_K=K, F77_lda=lda, F77_ldb=ldb;
028:    F77_INT F77_ldc=ldc;
029: #else
030:    #define F77_M M
031:    #define F77_N N
032:    #define F77_K K
033:    #define F77_lda lda
034:    #define F77_ldb ldb
035:    #define F77_ldc ldc
036: #endif
037: 
038:    extern int CBLAS_CallFromC;
039:    extern int RowMajorStrg;
040:    RowMajorStrg = 0;
041:    CBLAS_CallFromC = 1;
042:    if( Order == CblasColMajor )
043:    {
044:       if(TransA == CblasTrans) TA='T';
045:       else if ( TransA == CblasConjTrans ) TA='C';
046:       else if ( TransA == CblasNoTrans )   TA='N';
047:       else
048:       {
049:          cblas_xerbla(2, "cblas_sgemm",
050:                        "Illegal TransA setting, %d\n", TransA);
051:          CBLAS_CallFromC = 0;
052:          RowMajorStrg = 0;
053:          return;
054:       }
055: 
056:       if(TransB == CblasTrans) TB='T';
057:       else if ( TransB == CblasConjTrans ) TB='C';
058:       else if ( TransB == CblasNoTrans )   TB='N';
059:       else
060:       {
061:          cblas_xerbla(3, "cblas_sgemm",
062:                        "Illegal TransB setting, %d\n", TransB);
063:          CBLAS_CallFromC = 0;
064:          RowMajorStrg = 0;
065:          return;
066:       }
067: 
068:       #ifdef F77_CHAR
069:          F77_TA = C2F_CHAR(&TA);
070:          F77_TB = C2F_CHAR(&TB);
071:       #endif
072: 
073:       F77_sgemm(F77_TA, F77_TB, &F77_M, &F77_N, &F77_K, &alpha, A, &F77_lda, B, &F77_ldb, &beta, C, &F77_ldc);
074:    } else if (Order == CblasRowMajor)
075:    {
076:       RowMajorStrg = 1;
077:       if(TransA == CblasTrans) TB='T';
078:       else if ( TransA == CblasConjTrans ) TB='C';
079:       else if ( TransA == CblasNoTrans )   TB='N';
080:       else
081:       {
082:          cblas_xerbla(2, "cblas_sgemm",
083:                        "Illegal TransA setting, %d\n", TransA);
084:          CBLAS_CallFromC = 0;
085:          RowMajorStrg = 0;
086:          return;
087:       }
088:       if(TransB == CblasTrans) TA='T';
089:       else if ( TransB == CblasConjTrans ) TA='C';
090:       else if ( TransB == CblasNoTrans )   TA='N';
091:       else
092:       {
093:          cblas_xerbla(2, "cblas_sgemm",
094:                        "Illegal TransA setting, %d\n", TransA);
095:          CBLAS_CallFromC = 0;
096:          RowMajorStrg = 0;
097:          return;
098:       }
099:       #ifdef F77_CHAR
100:          F77_TA = C2F_CHAR(&TA);
101:          F77_TB = C2F_CHAR(&TB);
102:       #endif
103: 
104:       F77_sgemm(F77_TA, F77_TB, &F77_N, &F77_M, &F77_K, &alpha, B, &F77_ldb, A, &F77_lda, &beta, C, &F77_ldc);
105:    } else
106:      cblas_xerbla(1, "cblas_sgemm",
107:                      "Illegal Order setting, %d\n", Order);
108:    CBLAS_CallFromC = 0;
109:    RowMajorStrg = 0;
110: }
111: