1 /*
2 *
3 * cblas_dgemm.c
4 * This program is a C interface to dgemm.
5 * Written by Keita Teranishi
6 * 4/8/1998
7 *
8 */
9
10 #include <R.h>
11 #include <R_ext/Applic.h> /* R blas declarations */
12
13 #include "cblas.h"
cblas_dgemm(const enum CBLAS_ORDER Order,const enum CBLAS_TRANSPOSE TransA,const enum CBLAS_TRANSPOSE TransB,const int M,const int N,const int K,const double alpha,const double * A,const int lda,const double * B,const int ldb,const double beta,double * C,const int ldc)14 void cblas_dgemm(const enum CBLAS_ORDER Order, const enum CBLAS_TRANSPOSE TransA,
15 const enum CBLAS_TRANSPOSE TransB, const int M, const int N,
16 const int K, const double alpha, const double *A,
17 const int lda, const double *B, const int ldb,
18 const double beta, double *C, const int ldc)
19 {
20 char TA, TB;
21 #ifdef F77_CHAR
22 F77_CHAR F77_TA, F77_TB;
23 #else
24 #define F77_TA &TA
25 #define F77_TB &TB
26 #endif
27
28 #ifdef F77_INT
29 F77_INT F77_M=M, F77_N=N, F77_K=K, F77_lda=lda, F77_ldb=ldb;
30 F77_INT F77_ldc=ldc;
31 #else
32 #define F77_M M
33 #define F77_N N
34 #define F77_K K
35 #define F77_lda lda
36 #define F77_ldb ldb
37 #define F77_ldc ldc
38 #endif
39
40 /* the follow two vars were originally in Carla's.h as ex-terns, but that runs into conflicts on system with a
41 preexisting cblas */
42 int CBLAS_CallFromC;
43 int RowMajorStrg;
44
45 RowMajorStrg = 0;
46 CBLAS_CallFromC = 1;
47
48 if( Order == CblasColMajor )
49 {
50 if(TransA == CblasTrans) TA='T';
51 else if ( TransA == CblasConjTrans ) TA='C';
52 else if ( TransA == CblasNoTrans ) TA='N';
53 else
54 {
55 error("cblas_dgemm","Illegal TransA setting, %d\n", TransA);
56 /* cblas_xerbla(2, "cblas_dgemm","Illegal TransA setting, %d\n", TransA); */
57 CBLAS_CallFromC = 0;
58 RowMajorStrg = 0;
59 return;
60 }
61
62 if(TransB == CblasTrans) TB='T';
63 else if ( TransB == CblasConjTrans ) TB='C';
64 else if ( TransB == CblasNoTrans ) TB='N';
65 else
66 {
67 error("cblas_dgemm","Illegal TransB setting, %d\n", TransB);
68 /* cblas_xerbla(3, "cblas_dgemm","Illegal TransB setting, %d\n", TransB); */
69 CBLAS_CallFromC = 0;
70 RowMajorStrg = 0;
71 return;
72 }
73
74 #ifdef F77_CHAR
75 F77_TA = C2F_CHAR(&TA);
76 F77_TB = C2F_CHAR(&TB);
77 #endif
78
79 F77_CALL(dgemm)(F77_TA, F77_TB, &F77_M, &F77_N, &F77_K, &alpha, A,
80 &F77_lda, B, &F77_ldb, &beta, C, &F77_ldc);
81 } else if (Order == CblasRowMajor)
82 {
83 RowMajorStrg = 1;
84 if(TransA == CblasTrans) TB='T';
85 else if ( TransA == CblasConjTrans ) TB='C';
86 else if ( TransA == CblasNoTrans ) TB='N';
87 else
88 {
89 error("cblas_dgemm","Illegal TransA setting, %d\n", TransA);
90 /* cblas_xerbla(2, "cblas_dgemm","Illegal TransA setting, %d\n", TransA); */
91 CBLAS_CallFromC = 0;
92 RowMajorStrg = 0;
93 return;
94 }
95 if(TransB == CblasTrans) TA='T';
96 else if ( TransB == CblasConjTrans ) TA='C';
97 else if ( TransB == CblasNoTrans ) TA='N';
98 else
99 {
100 error("cblas_dgemm","Illegal TransB setting, %d\n", TransB);
101 /* cblas_xerbla(2, "cblas_dgemm","Illegal TransB setting, %d\n", TransB); */
102 CBLAS_CallFromC = 0;
103 RowMajorStrg = 0;
104 return;
105 }
106 #ifdef F77_CHAR
107 F77_TA = C2F_CHAR(&TA);
108 F77_TB = C2F_CHAR(&TB);
109 #endif
110
111 F77_CALL(dgemm)(F77_TA, F77_TB, &F77_N, &F77_M, &F77_K, &alpha, B,
112 &F77_ldb, A, &F77_lda, &beta, C, &F77_ldc);
113 }
114 else {
115 error("cblas_dgemm", "Illegal Order setting, %d\n", Order);
116 /* cblas_xerbla(1, "cblas_dgemm", "Illegal Order setting, %d\n", Order); */
117 }
118 CBLAS_CallFromC = 0;
119 RowMajorStrg = 0;
120 return;
121 }
122
123
124