src/test/run-pass/float_math.rs

   1 // Copyright 2016 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 #![feature(core_intrinsics)]
  12
  13 use std::intrinsics::{fadd_fast, fsub_fast, fmul_fast, fdiv_fast, frem_fast};
  14
  15 #[inline(never)]
  16 pub fn test_operations(a: f64, b: f64) {
  17     // make sure they all map to the correct operation
  18     unsafe {
  19         assert_eq!(fadd_fast(a, b), a + b);
  20         assert_eq!(fsub_fast(a, b), a - b);
  21         assert_eq!(fmul_fast(a, b), a * b);
  22         assert_eq!(fdiv_fast(a, b), a / b);
  23         assert_eq!(frem_fast(a, b), a % b);
  24     }
  25 }
  26
  27 fn main() {
  28     test_operations(1., 2.);
  29     test_operations(10., 5.);
  30 }