Function __qdbl 

pub unsafe fn __qdbl(a: i32) -> i32

🔬This is a nightly-only experimental API. (stdarch_arm_dsp #117237)

Available on ARM and (target feature v5te and non-target feature mclass, or target features mclass and dsp) only.

Insert a QADD instruction

Returns the 32-bit saturating signed equivalent of a + a Sets the Q flag if saturation occurs.