Function gemm_fallback_f16

pub unsafe fn gemm_fallback_f16(
    m: usize,
    n: usize,
    k: usize,
    alpha: f16,
    a: *const f16,
    a_rs: usize,
    a_cs: usize,
    b: *const f16,
    b_rs: usize,
    b_cs: usize,
    beta: f16,
    c: *mut f16,
    c_rs: usize,
    c_cs: usize,
)