Function rgsl::cblas::level3::dgemm

pub fn dgemm(order: Order, 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)