Function core::arch::arm::__usad8

pub unsafe fn __usad8(a: int8x4_t, b: int8x4_t) -> u32

🔬This is a nightly-only experimental API. (stdsimd #48556)

Available on ARM only.

8 位绝对差之和。

返回与之等效的 8 位无符号

res = abs(a[0] - b[0]) + abs(a[1] - b[1]) +
(a[2] - b[2]) + (a[3] - b[3])