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

   1 // xfail-fast
   2
   3 // Copyright 2012 The Rust Project Developers. See the COPYRIGHT
   4 // file at the top-level directory of this distribution and at
   5 // http://rust-lang.org/COPYRIGHT.
   6 //
   7 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   8 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   9 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
  10 // option. This file may not be copied, modified, or distributed
  11 // except according to those terms.
  12
  13 extern mod std;
  14
  15 mod rusti {
  16     #[abi = "rust-intrinsic"]
  17     pub extern "rust-intrinsic" {
  18         fn ctpop8(x: i8) -> i8;
  19         fn ctpop16(x: i16) -> i16;
  20         fn ctpop32(x: i32) -> i32;
  21         fn ctpop64(x: i64) -> i64;
  22
  23         fn ctlz8(x: i8) -> i8;
  24         fn ctlz16(x: i16) -> i16;
  25         fn ctlz32(x: i32) -> i32;
  26         fn ctlz64(x: i64) -> i64;
  27
  28         fn cttz8(x: i8) -> i8;
  29         fn cttz16(x: i16) -> i16;
  30         fn cttz32(x: i32) -> i32;
  31         fn cttz64(x: i64) -> i64;
  32
  33         fn bswap16(x: i16) -> i16;
  34         fn bswap32(x: i32) -> i32;
  35         fn bswap64(x: i64) -> i64;
  36     }
  37 }
  38
  39 pub fn main() {
  40     unsafe {
  41         use rusti::*;
  42
  43         assert!((ctpop8(0i8) == 0i8));
  44         assert!((ctpop16(0i16) == 0i16));
  45         assert!((ctpop32(0i32) == 0i32));
  46         assert!((ctpop64(0i64) == 0i64));
  47
  48         assert!((ctpop8(1i8) == 1i8));
  49         assert!((ctpop16(1i16) == 1i16));
  50         assert!((ctpop32(1i32) == 1i32));
  51         assert!((ctpop64(1i64) == 1i64));
  52
  53         assert!((ctpop8(10i8) == 2i8));
  54         assert!((ctpop16(10i16) == 2i16));
  55         assert!((ctpop32(10i32) == 2i32));
  56         assert!((ctpop64(10i64) == 2i64));
  57
  58         assert!((ctpop8(100i8) == 3i8));
  59         assert!((ctpop16(100i16) == 3i16));
  60         assert!((ctpop32(100i32) == 3i32));
  61         assert!((ctpop64(100i64) == 3i64));
  62
  63         assert!((ctpop8(-1i8) == 8i8));
  64         assert!((ctpop16(-1i16) == 16i16));
  65         assert!((ctpop32(-1i32) == 32i32));
  66         assert!((ctpop64(-1i64) == 64i64));
  67
  68         assert!((ctlz8(0i8) == 8i8));
  69         assert!((ctlz16(0i16) == 16i16));
  70         assert!((ctlz32(0i32) == 32i32));
  71         assert!((ctlz64(0i64) == 64i64));
  72
  73         assert!((ctlz8(1i8) == 7i8));
  74         assert!((ctlz16(1i16) == 15i16));
  75         assert!((ctlz32(1i32) == 31i32));
  76         assert!((ctlz64(1i64) == 63i64));
  77
  78         assert!((ctlz8(10i8) == 4i8));
  79         assert!((ctlz16(10i16) == 12i16));
  80         assert!((ctlz32(10i32) == 28i32));
  81         assert!((ctlz64(10i64) == 60i64));
  82
  83         assert!((ctlz8(100i8) == 1i8));
  84         assert!((ctlz16(100i16) == 9i16));
  85         assert!((ctlz32(100i32) == 25i32));
  86         assert!((ctlz64(100i64) == 57i64));
  87
  88         assert!((cttz8(-1i8) == 0i8));
  89         assert!((cttz16(-1i16) == 0i16));
  90         assert!((cttz32(-1i32) == 0i32));
  91         assert!((cttz64(-1i64) == 0i64));
  92
  93         assert!((cttz8(0i8) == 8i8));
  94         assert!((cttz16(0i16) == 16i16));
  95         assert!((cttz32(0i32) == 32i32));
  96         assert!((cttz64(0i64) == 64i64));
  97
  98         assert!((cttz8(1i8) == 0i8));
  99         assert!((cttz16(1i16) == 0i16));
 100         assert!((cttz32(1i32) == 0i32));
 101         assert!((cttz64(1i64) == 0i64));
 102
 103         assert!((cttz8(10i8) == 1i8));
 104         assert!((cttz16(10i16) == 1i16));
 105         assert!((cttz32(10i32) == 1i32));
 106         assert!((cttz64(10i64) == 1i64));
 107
 108         assert!((cttz8(100i8) == 2i8));
 109         assert!((cttz16(100i16) == 2i16));
 110         assert!((cttz32(100i32) == 2i32));
 111         assert!((cttz64(100i64) == 2i64));
 112
 113         assert!((cttz8(-1i8) == 0i8));
 114         assert!((cttz16(-1i16) == 0i16));
 115         assert!((cttz32(-1i32) == 0i32));
 116         assert!((cttz64(-1i64) == 0i64));
 117
 118         assert!((bswap16(0x0A0Bi16) == 0x0B0Ai16));
 119         assert!((bswap32(0x0ABBCC0Di32) == 0x0DCCBB0Ai32));
 120         assert!((bswap64(0x0122334455667708i64) == 0x0877665544332201i64));
 121     }
 122 }