Function core::arch::arm::__smusd

pub unsafe fn __smusd(a: int16x2_t, b: int16x2_t) -> i32

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

This is supported on ARM only.

有符号的双数乘法减法。

返回等价于

res = a[0] * b[0] - a[1] * b[1]

并在加法发生溢出时设置 Q 标志。