Function __smultb 

pub unsafe fn __smultb(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 SMULTB instruction

Returns the equivalent of a[0] * b[1] where [0] is the lower 16 bits and [1] is the upper 16 bits.