#include "isaac/array.h"
#include "isaac/symbolic/execute.h"
#include "cublas.h"

namespace sc = isaac;

extern "C"
{

    //*****************
    //BLAS1
    //*****************

    //AXPY
    #define MAKE_AXPY(TYPE_CHAR, TYPE_ISAAC, TYPE_CU) \
    void cublas ## TYPE_CHAR ## axpy (int n, TYPE_CU alpha, const TYPE_CU *x, int incx, TYPE_CU *y, int incy)\
    {\
        sc::array dx((sc::int_t)n, TYPE_ISAAC, sc::driver::Buffer((CUdeviceptr)x,false), 0, incx); \
        sc::array dy((sc::int_t)n, TYPE_ISAAC, sc::driver::Buffer((CUdeviceptr)y,false), 0, incy); \
        sc::execute(sc::assign(dy, alpha*dx + dy));\
    }\

    MAKE_AXPY(S, sc::FLOAT_TYPE, float)
    MAKE_AXPY(D, sc::DOUBLE_TYPE, double)

    //COPY
    #define MAKE_COPY(TYPE_CHAR, TYPE_ISAAC, TYPE_CU) \
    void cublas ## TYPE_CHAR ## copy (int n, const TYPE_CU *x, int incx, TYPE_CU *y, int incy)\
    {\
        sc::array dx((sc::int_t)n, TYPE_ISAAC, sc::driver::Buffer((CUdeviceptr)x,false), 0, incx); \
        sc::array dy((sc::int_t)n, TYPE_ISAAC, sc::driver::Buffer((CUdeviceptr)y,false), 0, incy); \
        sc::execute(sc::assign(dy,dx));\
    }\

    MAKE_COPY(S, sc::FLOAT_TYPE, float)
    MAKE_COPY(D, sc::DOUBLE_TYPE, double)

    //SCAL
    #define MAKE_SCAL(TYPE_CHAR, TYPE_ISAAC, TYPE_CU) \
    void cublas ## TYPE_CHAR ## scal (int n, TYPE_CU alpha, TYPE_CU *x, int incx)\
    {\
        sc::array dx((sc::int_t)n, TYPE_ISAAC, sc::driver::Buffer((CUdeviceptr)x,false), 0, incx); \
        sc::execute(sc::assign(dx,alpha*dx));\
    }\

    MAKE_SCAL(S, sc::FLOAT_TYPE, float)
    MAKE_SCAL(D, sc::DOUBLE_TYPE, double)

    //DOT
    #define MAKE_DOT(TYPE_CHAR, TYPE_ISAAC, TYPE_CU) \
    TYPE_CU cublas ## TYPE_CHAR ## dot (int n, const TYPE_CU *x, int incx, const TYPE_CU *y, int incy)\
    {\
        sc::array dx((sc::int_t)n, TYPE_ISAAC, sc::driver::Buffer((CUdeviceptr)x,false), 0, incx); \
        sc::array dy((sc::int_t)n, TYPE_ISAAC, sc::driver::Buffer((CUdeviceptr)y,false), 0, incy); \
        return sc::value_scalar(sc::dot(dx,dy));\
    }\

    MAKE_DOT(S, sc::FLOAT_TYPE, float)
    MAKE_DOT(D, sc::DOUBLE_TYPE, double)

    //ASUM
    #define MAKE_ASUM(TYPE_CHAR, TYPE_ISAAC, TYPE_CU) \
    TYPE_CU cublas ## TYPE_CHAR ## asum (int n, const TYPE_CU *x, int incx)\
    {\
        sc::array dx((sc::int_t)n, TYPE_ISAAC, sc::driver::Buffer((CUdeviceptr)x,false), 0, incx); \
        return sc::value_scalar(sum(abs(dx)));\
    }\

    MAKE_ASUM(S, sc::FLOAT_TYPE, float)
    MAKE_ASUM(D, sc::DOUBLE_TYPE, double)

    //*****************
    //BLAS2
    //*****************

    #define MAKE_GEMV(TYPE_CHAR, TYPE_ISAAC, TYPE_CU) \
    void cublas ## TYPE_CHAR ## gemv (char trans, int m, int n, TYPE_CU alpha,\
                                   const TYPE_CU *A, int lda, const TYPE_CU *x, int incx,\
                                   TYPE_CU beta, TYPE_CU *y, int incy)\
    {\
        sc::array dA((sc::int_t)m, (sc::int_t)n, TYPE_ISAAC, sc::driver::Buffer((CUdeviceptr)A, false), 0, (sc::int_t)lda);\
        \
        sc::int_t sx = (sc::int_t)n, sy = (sc::int_t)m;\
        if(trans=='T') std::swap(sx, sy);\
        sc::array dx(sx, TYPE_ISAAC, sc::driver::Buffer((CUdeviceptr)x, false), 0, incx);\
        sc::array dy(sy, TYPE_ISAAC, sc::driver::Buffer((CUdeviceptr)y, false), 0, incy);\
        \
        if(trans=='T')\
            sc::execute(sc::assign(dy, alpha*dot(dA.T, dx) + beta*dy));\
        else\
            sc::execute(sc::assign(dy, alpha*dot(dA, dx) + beta*dy));\
    }

    MAKE_GEMV(S, sc::FLOAT_TYPE, float)
    MAKE_GEMV(D, sc::DOUBLE_TYPE, double)

    //*****************
    //BLAS3
    //*****************

    #define MAKE_GEMM(TYPE_CHAR, TYPE_ISAAC, TYPE_CU) \
    void cublas ## TYPE_CHAR ## gemm (char transa, char transb, int m, int n, int k,\
                                   TYPE_CU alpha, const TYPE_CU *A, int lda,\
                                   const TYPE_CU *B, int ldb, TYPE_CU beta, TYPE_CU *C,\
                                   int ldc)\
    {\
        sc::int_t As1 = (sc::int_t)m, As2 = (sc::int_t)k;\
        sc::int_t Bs1 = (sc::int_t)k, Bs2 = (sc::int_t)n;\
        if(transa=='T') std::swap(As1, As2);\
        if(transb=='T') std::swap(Bs1, Bs2);\
        /*Struct*/\
        sc::array dA(As1, As2, TYPE_ISAAC, sc::driver::Buffer((CUdeviceptr)A, false), 0, (sc::int_t)lda);\
        sc::array dB(Bs1, Bs2, TYPE_ISAAC, sc::driver::Buffer((CUdeviceptr)B, false), 0, (sc::int_t)ldb);\
        sc::array dC((sc::int_t)m, (sc::int_t)n, TYPE_ISAAC, sc::driver::Buffer((CUdeviceptr)C, false), 0, (sc::int_t)ldc);\
        /*Operation*/\
        if((transa=='T') && (transb=='T'))\
            sc::execute(sc::assign(dC, alpha*dot(dA.T, dB.T) + beta*dC));\
        else if((transa=='T') && (transb=='N'))\
            sc::execute(sc::assign(dC, alpha*dot(dA.T, dB) + beta*dC));\
        else if((transa=='N') && (transb=='T'))\
            sc::execute(sc::assign(dC, alpha*dot(dA, dB.T) + beta*dC));\
        else\
            sc::execute(sc::assign(dC, alpha*dot(dA, dB) + beta*dC));\
    }

    MAKE_GEMM(S, sc::FLOAT_TYPE, cl_float)
    MAKE_GEMM(D, sc::DOUBLE_TYPE, cl_double)
}