Function _mm_cmpistrc

#[target_feature(enable = "sse4.2")]
pub fn _mm_cmpistrc(a: __m128i, b: __m128i, IMM8: i32) -> i32

Compares packed strings with implicit lengths in a and b using the control in IMM8, and return 1 if the resulting mask was non-zero, and 0 otherwise.

Intel's documentation