Function _mm_cmpestrm
#[target_feature(enable = "sse4.2")]
pub fn _mm_cmpestrm(a: __m128i, la: i32, b: __m128i, lb: i32, IMM8: i32) -> __m128i
Compares packed strings in a and b with lengths la and lb
using the control in IMM8, and return the generated mask.