ekmett

Those, frankly, are a very poor subset of shuffles.
The shuffle* primops exposed by GHC (for example shuffleFloatX4#) take runtime vector arguments that specify shuffle indices dynamically.
They correspond to register-controlled SIMD shuffle operations on x86.
Unfortunately, those are not efficient variants — they’re just the ones that cleanly map onto our current primop representation, and they often don't even exist on older CPUs.

Let’s take a dive through Intel’s “shuffle-like” operations.
Of these, the first group uses compile-time immediates to select shuffle positions, and thus are the ones we’d want to reach eventually, if we knew the constants involved at all.

Instruction	Width	Control	Description

amno1

;;; cua-mini.el --- Override standard bindings with CUA-bindings -*- lexical-binding: t; -*-

;; Copyright (C) 2024  Arthur Miller

;; Author: Arthur Miller <[email protected]>
;; Keywords:

;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or

frafra

How to solve Could not initialize GLX and similar errors?

Workaround (not recommended)

export QT_XCB_GL_INTEGRATION=none

-- NixOS/nixpkgs#82959 (comment)

vshabanov

{-# LANGUAGE GHC2021, LambdaCase, PatternSynonyms, RecordWildCards,
             ViewPatterns, OverloadedStrings, GADTs, NoMonoLocalBinds,
             UnboxedTuples, MagicHash #-}

{-# OPTIONS_GHC -O2 -fspec-constr-count=100 -fllvm #-}
-- need at least 8 to completely remove all allocations
-- (I don't know what change lead to it)

{-# OPTIONS_GHC -Wall -Wno-gadt-mono-local-binds -Wno-type-defaults #-}

ttesmer

{-# LANGUAGE TypeSynonymInstances #-}
data Dual d = D Float d deriving Show
type Float' = Float

diff :: (Dual Float' -> Dual Float') -> Float -> Float'
diff f x = y'
  where D y y' = f (D x 1)

class VectorSpace v where
  zero  :: v

moyix

Question                             Real      Guess Correct? RelErr Digits
What is 18857 - 592?                18265      18265   Yes      0.0%   5/5
What is 30752 - 3087?               27665      27365    No      1.1%   4/5
What is 2241 + 19873?               22114      22114   Yes      0.0%   5/5
What is 5412 + 10169?               15581      15581   Yes      0.0%   5/5
What is 11831 - 9178?                2653       3153    No     18.8%   2/4
What is 1701 * 19933?            33906033   33953373    No      0.1%   4/8
What is 11648 + 17851?              29499      30509    No      3.4%   1/5
What is 29253 - 6202?               23051      22151    No      3.9%   3/5
What is 27365 + 24989?              52354      53554    No      2.3%   3/5

Arnavion

#!/usr/bin/awk -f

BEGIN {
	while (1) {
		split(exec_line_match("ip addr show dev eth0", " inet "), ip_a_parts, " ")
		split(ip_a_parts[2], ip_value_parts, "/")
		split(ip_value_parts[1], ip_parts, ".")

		reset();

kosmikus

{-| This @lens@ tutorial targets Haskell beginners and assumes only basic
    familiarity with Haskell.  By the end of this tutorial you should:

    * understand what problems the @lens@ library solves,

    * know when it is appropriate to use the @lens@ library,

    * be proficient in the most common @lens@ idioms,

    * understand the drawbacks of using lenses, and:

yolabingo

<?php

/*
Wordpress bug https://core.trac.wordpress.org/ticket/47855

When using a current PHP version, class-phpmailer.php:validateAddress() uses a complex regex ("pcre8") for email address validation.

PHP < 7.3 uses libpcre 8.x.
PHP 7.3 uses libpcre2 10.x.
Due to a bug in libpcre2 < 10.32-RC1 https://bugs.exim.org/show_bug.cgi?id=2300, 

rjhansen

SKS Keyserver Network Under Attack

This work is released under a Creative Commons Attribution-NoDerivatives 4.0 International License.

Terminological Note

"OpenPGP" refers to the OpenPGP protocol, in much the same way that HTML refers to the protocol that specifies how to write a web page. "GnuPG", "SequoiaPGP", "OpenPGP.js", and others are implementations of the OpenPGP protocol in the same way that Mozilla Firefox, Google Chromium, and Microsoft Edge refer to software packages that process HTML data.

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