## _subborrow_u64

# Function _subborrow_u64

1.33.0 · Source

    pub unsafe fn _subborrow_u64(c_in: u8, a: u64, b: u64, out: &mut u64) -> u8

Available on x86-64 only.
Expand description

Adds unsigned 64-bit integers `a` and `b` with unsigned 8-bit carry-in `c_in`. (carry or overflow flag), and store the unsigned 64-bit result in `out`, and the carry-out is returned (carry or overflow flag).

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