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      1 
      2 #define BLAS_FUNC(NAME) CAT(CAT(SCALAR_PREFIX,NAME),_)
      3 
      4 template<> class blas_interface<SCALAR> : public c_interface_base<SCALAR>
      5 {
      6 
      7 public :
      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     int info = 0;
     79     int * ipiv = (int*)alloca(sizeof(int)*N);
     80     BLAS_FUNC(getrf)(&N, &N, C, &N, ipiv, &info);
     81     if(info!=0) std::cerr << "getrf_ error " << info << "\n";
     82   }
     83 
     84   static inline void trisolve_lower(const gene_matrix & L, const gene_vector& B, gene_vector & X, int N){
     85     BLAS_FUNC(copy)(&N, B, &intone, X, &intone);
     86     BLAS_FUNC(trsv)(&lower, &notrans, &nonunit, &N, L, &N, X, &intone);
     87   }
     88 
     89   static inline void trisolve_lower_matrix(const gene_matrix & L, const gene_matrix& B, gene_matrix & X, int N){
     90     BLAS_FUNC(copy)(&N, B, &intone, X, &intone);
     91     BLAS_FUNC(trsm)(&right, &lower, &notrans, &nonunit, &N, &N, &fone, L, &N, X, &N);
     92   }
     93 
     94   static inline void trmm(gene_matrix & A, gene_matrix & B, gene_matrix & /*X*/, int N){
     95     BLAS_FUNC(trmm)(&left, &lower, &notrans,&nonunit, &N,&N,&fone,A,&N,B,&N);
     96   }
     97 
     98   #ifdef HAS_LAPACK
     99 
    100   static inline void lu_decomp(const gene_matrix & X, gene_matrix & C, int N){
    101     int N2 = N*N;
    102     BLAS_FUNC(copy)(&N2, X, &intone, C, &intone);
    103     int info = 0;
    104     int * ipiv = (int*)alloca(sizeof(int)*N);
    105     int * jpiv = (int*)alloca(sizeof(int)*N);
    106     BLAS_FUNC(getc2)(&N, C, &N, ipiv, jpiv, &info);
    107   }
    108 
    109 
    110 
    111   static inline void hessenberg(const gene_matrix & X, gene_matrix & C, int N){
    112     {
    113       int N2 = N*N;
    114       int inc = 1;
    115       BLAS_FUNC(copy)(&N2, X, &inc, C, &inc);
    116     }
    117     int info = 0;
    118     int ilo = 1;
    119     int ihi = N;
    120     int bsize = 64;
    121     int worksize = N*bsize;
    122     SCALAR* d = new SCALAR[N+worksize];
    123     BLAS_FUNC(gehrd)(&N, &ilo, &ihi, C, &N, d, d+N, &worksize, &info);
    124     delete[] d;
    125   }
    126 
    127   static inline void tridiagonalization(const gene_matrix & X, gene_matrix & C, int N){
    128     {
    129       int N2 = N*N;
    130       int inc = 1;
    131       BLAS_FUNC(copy)(&N2, X, &inc, C, &inc);
    132     }
    133     char uplo = 'U';
    134     int info = 0;
    135     int bsize = 64;
    136     int worksize = N*bsize;
    137     SCALAR* d = new SCALAR[3*N+worksize];
    138     BLAS_FUNC(sytrd)(&uplo, &N, C, &N, d, d+N, d+2*N, d+3*N, &worksize, &info);
    139     delete[] d;
    140   }
    141 
    142   #endif // HAS_LAPACK
    143 
    144 };
    145 
    146 SCALAR blas_interface<SCALAR>::fone = SCALAR(1);
    147 SCALAR blas_interface<SCALAR>::fzero = SCALAR(0);
    148