bitonic

Play this game by pasting the script in http://www.puzzlescript.net/editor.html

bitonic

// Compiled with
//
//    g++ -std=c++17 -march=native -O3 -I<path-to-eigen-master> eigen-avx.c -o eigen-avx
//
// Expected output:
//
//     With size 8, normal_count: 0, packet4_count: 0, packet8_count: 1
//     With size 9, normal_count: 1, packet4_count: 0, packet8_count: 1
//
// Actual output:

bitonic

// Vectorized (SSE and AVX, through Eigen) atan2 and acos.
//
// Care has been taken to ensure that the vectorized results are identical to the non-vectorized
// ones.
//
// Original functions from <https://developer.download.nvidia.com/cg/index_stdlib.html>, adapted
// to work in bulk. Both seem to be very accurate (only tested that error < 0.01
// degrees, which is what I need).

#include <Eigen/Core>

bitonic

function signNonZero(x: number): number {
  return x < 0 ? -1 : 1;
}

function inClosedInterval(a: number, x: number, b: number): boolean {
  return (x-a) * (x-b) <= 0;
}

function segContainsPoint(a: number, b: number, x: number): number {
  return (b > x ? 1 : 0) - (a > x ? 1 : 0);

bitonic

#! /usr/bin/env bash

# Script to install NixOS from the Hetzner Cloud NixOS bootable ISO image.
# (tested with Hetzner's `NixOS 20.03 (amd64/minimal)` ISO image).
#
# This script wipes the disk of the server!
#
# Instructions:
#
# 1. Mount the above mentioned ISO image from the Hetzner Cloud GUI

bitonic

# Edit this configuration file to define what should be installed on
# your system.  Help is available in the configuration.nix(5) man page
# and in the NixOS manual (accessible by running ‘nixos-help’).

{ config, pkgs, ... }:

{
  imports =
    [ # Include the results of the hardware scan.
      ./hardware-configuration.nix

bitonic

{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE UndecidableInstances #-}
{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE TypeApplications #-}
{-# LANGUAGE RankNTypes #-}
{-# LANGUAGE BangPatterns #-}
{-# OPTIONS_GHC -Wall #-}
import Data.IORef

bitonic

{-# LANGUAGE MultiWayIf #-}
{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE RecordWildCards #-}
import Data.List (transpose)

data Forward a = Forward { _value :: !a, _grad :: !a }
  deriving (Show, Eq)

lift :: Num a => a -> Forward a
lift a = Forward { _value = a, _grad = 0 }

bitonic

// See <https://gist.github.com/pervognsen/b58108d134824e61caedffcc01004e03> for
// Per Vognsen gist on value speculation.
//
// I compile this on linux with
//
//     $ clang --version
//     clang version 12.0.0
//     Target: x86_64-unknown-linux-gnu
//     $ clang -static -Wall -O3 value-speculation-linux.c -o value-speculation-linux
//

bitonic

// Copyright (c) 2021 Francesco Mazzoli <f@mazzo.li>
//
// Permission to use, copy, modify, and distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES