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use std::ops::*;
pub trait MachineInteger
: Sized +
Copy +
Clone +
PartialEq +
Eq +
Shr<u32,Output=Self> +
Shl<u32,Output=Self> +
BitAnd<Output=Self> +
BitOr<Output=Self> +
From<i32>
{
const XLEN : u32;
fn bit_slice(&self, i:usize, j:usize) -> Self;
fn slice_mask(a:usize, b:usize) -> Self {
let all_ones = Self::all_set();
all_ones.bit_slice(a, b) << (b as u32)
}
fn all_set() -> Self;
fn zero() -> Self { Self::from(0) }
}
impl MachineInteger for i32 {
const XLEN : u32 = 32;
fn bit_slice(&self, i:usize, j:usize) -> i32 {
(self >> j) & ((1 << (i-j)) - 1)
}
fn all_set() -> Self { -1 }
}
impl MachineInteger for i64 {
const XLEN : u32 = 64;
fn bit_slice(&self, i:usize, j:usize) -> i64 {
(self >> j) & ((1 << (i-j)) - 1)
}
fn all_set() -> Self { -1 }
}
impl MachineInteger for i128 {
const XLEN : u32 = 128;
fn bit_slice(&self, i:usize, j:usize) -> i128 {
(self >> j) & ((1 << (i-j)) - 1)
}
fn all_set() -> Self { -1 }
}