rust/src/test/run-pass/intrinsics-integer.rs

// xfail-fast

// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

extern mod std;

mod rusti {
    #[abi = "rust-intrinsic"]
    pub extern "rust-intrinsic" {
        fn ctpop8(x: i8) -> i8;
        fn ctpop16(x: i16) -> i16;
        fn ctpop32(x: i32) -> i32;
        fn ctpop64(x: i64) -> i64;

        fn ctlz8(x: i8) -> i8;
        fn ctlz16(x: i16) -> i16;
        fn ctlz32(x: i32) -> i32;
        fn ctlz64(x: i64) -> i64;

        fn cttz8(x: i8) -> i8;
        fn cttz16(x: i16) -> i16;
        fn cttz32(x: i32) -> i32;
        fn cttz64(x: i64) -> i64;

        fn bswap16(x: i16) -> i16;
        fn bswap32(x: i32) -> i32;
        fn bswap64(x: i64) -> i64;
    }
}

pub fn main() {
    unsafe {
        use rusti::*;

        assert!((ctpop8(0i8) == 0i8));
        assert!((ctpop16(0i16) == 0i16));
        assert!((ctpop32(0i32) == 0i32));
        assert!((ctpop64(0i64) == 0i64));

        assert!((ctpop8(1i8) == 1i8));
        assert!((ctpop16(1i16) == 1i16));
        assert!((ctpop32(1i32) == 1i32));
        assert!((ctpop64(1i64) == 1i64));

        assert!((ctpop8(10i8) == 2i8));
        assert!((ctpop16(10i16) == 2i16));
        assert!((ctpop32(10i32) == 2i32));
        assert!((ctpop64(10i64) == 2i64));

        assert!((ctpop8(100i8) == 3i8));
        assert!((ctpop16(100i16) == 3i16));
        assert!((ctpop32(100i32) == 3i32));
        assert!((ctpop64(100i64) == 3i64));

        assert!((ctpop8(-1i8) == 8i8));
        assert!((ctpop16(-1i16) == 16i16));
        assert!((ctpop32(-1i32) == 32i32));
        assert!((ctpop64(-1i64) == 64i64));

        assert!((ctlz8(0i8) == 8i8));
        assert!((ctlz16(0i16) == 16i16));
        assert!((ctlz32(0i32) == 32i32));
        assert!((ctlz64(0i64) == 64i64));

        assert!((ctlz8(1i8) == 7i8));
        assert!((ctlz16(1i16) == 15i16));
        assert!((ctlz32(1i32) == 31i32));
        assert!((ctlz64(1i64) == 63i64));

        assert!((ctlz8(10i8) == 4i8));
        assert!((ctlz16(10i16) == 12i16));
        assert!((ctlz32(10i32) == 28i32));
        assert!((ctlz64(10i64) == 60i64));

        assert!((ctlz8(100i8) == 1i8));
        assert!((ctlz16(100i16) == 9i16));
        assert!((ctlz32(100i32) == 25i32));
        assert!((ctlz64(100i64) == 57i64));

        assert!((cttz8(-1i8) == 0i8));
        assert!((cttz16(-1i16) == 0i16));
        assert!((cttz32(-1i32) == 0i32));
        assert!((cttz64(-1i64) == 0i64));
        
        assert!((cttz8(0i8) == 8i8));
        assert!((cttz16(0i16) == 16i16));
        assert!((cttz32(0i32) == 32i32));
        assert!((cttz64(0i64) == 64i64));

        assert!((cttz8(1i8) == 0i8));
        assert!((cttz16(1i16) == 0i16));
        assert!((cttz32(1i32) == 0i32));
        assert!((cttz64(1i64) == 0i64));

        assert!((cttz8(10i8) == 1i8));
        assert!((cttz16(10i16) == 1i16));
        assert!((cttz32(10i32) == 1i32));
        assert!((cttz64(10i64) == 1i64));

        assert!((cttz8(100i8) == 2i8));
        assert!((cttz16(100i16) == 2i16));
        assert!((cttz32(100i32) == 2i32));
        assert!((cttz64(100i64) == 2i64));

        assert!((cttz8(-1i8) == 0i8));
        assert!((cttz16(-1i16) == 0i16));
        assert!((cttz32(-1i32) == 0i32));
        assert!((cttz64(-1i64) == 0i64));

        assert!((bswap16(0x0A0Bi16) == 0x0B0Ai16));
        assert!((bswap32(0x0ABBCC0Di32) == 0x0DCCBB0Ai32));
        assert!((bswap64(0x0122334455667708i64) == 0x0877665544332201i64));
    }
}