## __usad8

# Function __usad8

Source

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

🔬This is a nightly-only experimental API. (`stdarch_arm_dsp` #117237)
Available on ARM and (target feature `v6` and non-target feature `mclass`, or target features `mclass` and `dsp`) only.
Expand description

Sum of 8-bit absolute differences.

Returns the 8-bit unsigned equivalent of

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