Function u4_rshift_stack

bitvm/src/u4/u4_shift_stack.rs:38–45

Calculates n'th right shift of the top u4 element with both tables

(stack: &mut StackTracker, tables: StackVariable, n: u32)

/// Calculates n'th right shift of the top u4 element with both tables
pub fn u4_rshift_stack(stack: &mut StackTracker, tables: StackVariable, n: u32) -> StackVariable {
    assert!((1..4).contains(&n));
    if n == 3 {
        stack.number(8);
        return stack.op_greaterthanorequal();
    }
    stack.get_value_from_table(tables, Some(32 * (n - 1)))
}

/// Calculates n'th left shift of the top u4 element with both tables
pub fn u4_lshift_stack(stack: &mut StackTracker, tables: StackVariable, n: u32) -> StackVariable {