Function blas::c::dgemm

pub fn dgemm(layout: Layout,
             transa: Transpose,
             transb: Transpose,
             m: i32,
             n: i32,
             k: i32,
             alpha: f64,
             a: &[f64],
             lda: i32,
             b: &[f64],
             ldb: i32,
             beta: f64,
             c: &mut [f64],
             ldc: i32)