1
2#define BLAS_FUNC(NAME) CAT(CAT(SCALAR_PREFIX,NAME),_)
3
4template<> class blas_interface<SCALAR> : public c_interface_base<SCALAR>
5{
6
7public :
8
9  static SCALAR fone;
10  static SCALAR fzero;
11
12  static inline std::string name()
13  {
14    return MAKE_STRING(CBLASNAME);
15  }
16
17  static inline void matrix_vector_product(gene_matrix & A, gene_vector & B, gene_vector & X, int N){
18    BLAS_FUNC(gemv)(&notrans,&N,&N,&fone,A,&N,B,&intone,&fzero,X,&intone);
19  }
20
21  static inline void symv(gene_matrix & A, gene_vector & B, gene_vector & X, int N){
22    BLAS_FUNC(symv)(&lower, &N,&fone,A,&N,B,&intone,&fzero,X,&intone);
23  }
24
25  static inline void syr2(gene_matrix & A, gene_vector & B, gene_vector & X, int N){
26    BLAS_FUNC(syr2)(&lower,&N,&fone,B,&intone,X,&intone,A,&N);
27  }
28
29  static inline void ger(gene_matrix & A, gene_vector & X, gene_vector & Y, int N){
30    BLAS_FUNC(ger)(&N,&N,&fone,X,&intone,Y,&intone,A,&N);
31  }
32
33  static inline void rot(gene_vector & A,  gene_vector & B, SCALAR c, SCALAR s, int N){
34    BLAS_FUNC(rot)(&N,A,&intone,B,&intone,&c,&s);
35  }
36
37  static inline void atv_product(gene_matrix & A, gene_vector & B, gene_vector & X, int N){
38    BLAS_FUNC(gemv)(&trans,&N,&N,&fone,A,&N,B,&intone,&fzero,X,&intone);
39  }
40
41  static inline void matrix_matrix_product(gene_matrix & A, gene_matrix & B, gene_matrix & X, int N){
42    BLAS_FUNC(gemm)(&notrans,&notrans,&N,&N,&N,&fone,A,&N,B,&N,&fzero,X,&N);
43  }
44
45  static inline void transposed_matrix_matrix_product(gene_matrix & A, gene_matrix & B, gene_matrix & X, int N){
46    BLAS_FUNC(gemm)(&notrans,&notrans,&N,&N,&N,&fone,A,&N,B,&N,&fzero,X,&N);
47  }
48
49//   static inline void ata_product(gene_matrix & A, gene_matrix & X, int N){
50//     ssyrk_(&lower,&trans,&N,&N,&fone,A,&N,&fzero,X,&N);
51//   }
52
53  static inline void aat_product(gene_matrix & A, gene_matrix & X, int N){
54    BLAS_FUNC(syrk)(&lower,&notrans,&N,&N,&fone,A,&N,&fzero,X,&N);
55  }
56
57  static inline void axpy(SCALAR coef, const gene_vector & X, gene_vector & Y, int N){
58    BLAS_FUNC(axpy)(&N,&coef,X,&intone,Y,&intone);
59  }
60
61  static inline void axpby(SCALAR a, const gene_vector & X, SCALAR b, gene_vector & Y, int N){
62    BLAS_FUNC(scal)(&N,&b,Y,&intone);
63    BLAS_FUNC(axpy)(&N,&a,X,&intone,Y,&intone);
64  }
65
66  static inline void cholesky(const gene_matrix & X, gene_matrix & C, int N){
67    int N2 = N*N;
68    BLAS_FUNC(copy)(&N2, X, &intone, C, &intone);
69    char uplo = 'L';
70    int info = 0;
71    BLAS_FUNC(potrf)(&uplo, &N, C, &N, &info);
72    if(info!=0) std::cerr << "potrf_ error " << info << "\n";
73  }
74
75  static inline void partial_lu_decomp(const gene_matrix & X, gene_matrix & C, int N){
76    int N2 = N*N;
77    BLAS_FUNC(copy)(&N2, X, &intone, C, &intone);
78    char uplo = 'L';
79    int info = 0;
80    int * ipiv = (int*)alloca(sizeof(int)*N);
81    BLAS_FUNC(getrf)(&N, &N, C, &N, ipiv, &info);
82    if(info!=0) std::cerr << "getrf_ error " << info << "\n";
83  }
84
85  static inline void trisolve_lower(const gene_matrix & L, const gene_vector& B, gene_vector & X, int N){
86    BLAS_FUNC(copy)(&N, B, &intone, X, &intone);
87    BLAS_FUNC(trsv)(&lower, &notrans, &nonunit, &N, L, &N, X, &intone);
88  }
89
90  static inline void trisolve_lower_matrix(const gene_matrix & L, const gene_matrix& B, gene_matrix & X, int N){
91    BLAS_FUNC(copy)(&N, B, &intone, X, &intone);
92    BLAS_FUNC(trsm)(&right, &lower, &notrans, &nonunit, &N, &N, &fone, L, &N, X, &N);
93  }
94
95  static inline void trmm(gene_matrix & A, gene_matrix & B, gene_matrix & X, int N){
96    BLAS_FUNC(trmm)(&left, &lower, &notrans,&nonunit, &N,&N,&fone,A,&N,B,&N);
97  }
98
99  #ifdef HAS_LAPACK
100
101  static inline void lu_decomp(const gene_matrix & X, gene_matrix & C, int N){
102    int N2 = N*N;
103    BLAS_FUNC(copy)(&N2, X, &intone, C, &intone);
104    char uplo = 'L';
105    int info = 0;
106    int * ipiv = (int*)alloca(sizeof(int)*N);
107    int * jpiv = (int*)alloca(sizeof(int)*N);
108    BLAS_FUNC(getc2)(&N, C, &N, ipiv, jpiv, &info);
109  }
110
111
112
113  static inline void hessenberg(const gene_matrix & X, gene_matrix & C, int N){
114    {
115      int N2 = N*N;
116      int inc = 1;
117      BLAS_FUNC(copy)(&N2, X, &inc, C, &inc);
118    }
119    int info = 0;
120    int ilo = 1;
121    int ihi = N;
122    int bsize = 64;
123    int worksize = N*bsize;
124    SCALAR* d = new SCALAR[N+worksize];
125    BLAS_FUNC(gehrd)(&N, &ilo, &ihi, C, &N, d, d+N, &worksize, &info);
126    delete[] d;
127  }
128
129  static inline void tridiagonalization(const gene_matrix & X, gene_matrix & C, int N){
130    {
131      int N2 = N*N;
132      int inc = 1;
133      BLAS_FUNC(copy)(&N2, X, &inc, C, &inc);
134    }
135    char uplo = 'U';
136    int info = 0;
137    int ilo = 1;
138    int ihi = N;
139    int bsize = 64;
140    int worksize = N*bsize;
141    SCALAR* d = new SCALAR[3*N+worksize];
142    BLAS_FUNC(sytrd)(&uplo, &N, C, &N, d, d+N, d+2*N, d+3*N, &worksize, &info);
143    delete[] d;
144  }
145
146  #endif // HAS_LAPACK
147
148};
149
150SCALAR blas_interface<SCALAR>::fone = SCALAR(1);
151SCALAR blas_interface<SCALAR>::fzero = SCALAR(0);
152