TheIronBorn

import Foundation

private let measurements = 1_000
private func measureExecutionTime(_ title: String, f: (() -> Any) ) {
    let start = Date()
    var result: Any?
    for _ in 0..<measurements {
        result = f()
    }
    let end = Date()

TheIronBorn

macro_rules! simd_float_impls {
    ($ty:ident, $uty:ident, $f_scalar:ty, $u_scalar:ty, $fraction_bits:expr, $exponent_bias:expr,
     $next_u:ident) => {
        impl IntoFloat for $uty {
            type F = $ty;
            #[inline(always)]
            fn into_float_with_exponent(self, exponent: i32) -> $ty {
                // The exponent is encoded using an offset-binary representation
                let exponent_bits: $u_scalar =
                    (($exponent_bias + exponent) as $u_scalar) << $fraction_bits;

TheIronBorn

#![feature(test)]
#![feature(stdsimd)]

extern crate rand;
extern crate test;

use std::simd::*;
use std::mem;

use test::black_box;

TheIronBorn

//! Calculates the probabilities of acceptance for various methods of random uniform sampling from 
//! integer ranges.

use std::num::Wrapping;
use std::ops::Neg;

fn wmul(x: u8, y: u8) -> (u8, u8) {
    let m = x as u16 * y as u16;
    let hi = (m >> 8) as u8;
    let lo = m as u8;