Function core::arch::x86_64::_mm_cmpistra

pub unsafe fn _mm_cmpistra(a: __m128i, b: __m128i, const IMM8: i32) -> i32

This is supported on x86-64 and target feature sse4.2 only.

Compares 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.

Intel’s documentation