Function __smulwb 

pub unsafe fn __smulwb(a: i32, b: 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 SMULWB instruction

Multiplies the 32-bit signed first operand with the low halfword (as a 16-bit signed integer) of the second operand. Return the top 32 bits of the 48-bit product