arch:: x86:: _subborrow_u32
pub unsafe fn _subborrow_u32(c_in: u8, a: u32, b: u32, out: &mut u32) -> u8
This is supported on x86 only.
Adds unsigned 32-bit integers
b with unsigned 8-bit carry-in
(carry or overflow flag), and store the unsigned 32-bit result in
the carry-out is returned (carry or overflow flag).