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;

#[abi = "rust-intrinsic"]  
extern mod rusti {
    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);
    }
}