Function core::arch::arm::dsp::__smlawb

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

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

This is supported on ARM only.

插入 SMLAWB 指令

返回 (a * b[0] + (c <<16) ) >> 16 的等效项，其中 [0] 是低 16 位，而 [1] 是高 16 位。

如果加法发生溢出，则设置 Q 标志。