Function core::arch::arm::__smusdx

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

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

Available on ARM only.

有符号的双数乘法减法反转。

返回等价于

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

并在加法发生溢出时设置 Q 标志。