Type Alias Dgemm64FnPtr 

pub type Dgemm64FnPtr = unsafe extern "C" fn(*const i8, *const i8, *const i64, *const i64, *const i64, *const f64, *const f64, *const i64, *const f64, *const i64, *const f64, *mut f64, *const i64);

BLAS dgemm function pointer type (ILP64: 64-bit integers)

Signature matches Fortran BLAS dgemm (ILP64):

void dgemm_(char *transa, char *transb, long long *m, long long *n, long long *k,
            double *alpha, double *a, long long *lda, double *b, long long *ldb,
            double *beta, double *c, long long *ldc);