Function core::arch::x86_64::_mm_cmpestra

pub unsafe fn _mm_cmpestra(
    a: __m128i,
    la: i32,
    b: __m128i,
    lb: i32,
    const IMM8: i32
) -> i32

Available on (x86 or x86-64) and target feature sse4.2 and x86-64 only.

Compares packed strings in a and b with lengths la and lb 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