Function _mm_cmpistra
#[target_feature(enable = "sse4.2")]
pub fn _mm_cmpistra(a: __m128i, b: __m128i, IMM8: i32) -> i32Compares packed strings with implicit lengths in a and b using the
control in IMM8, and return 1 if b did not contain a null
character and the resulting mask was zero, and 0 otherwise.