andreis

## RISC-V.md

      
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                erincandescent
                / RISC-V.md
            
            
              Created
              July 25, 2019 23:32
            
          
    Foreward

This document was originally written several years ago. At the time I was working as an execution core verification engineer at Arm. The following points are coloured heavily by working in and around the execution cores of various processors. Apply a pinch of salt; points contain varying degrees of opinion.
It is still my opinion that RISC-V could be much better designed; though I will also say that if I was building a 32 or 64-bit CPU today I'd likely implement the architecture to benefit from the existing tooling.
Mostly based upon the RISC-V ISA spec v2.0. Some updates have been made for v2.2
Original Foreword: Some Opinion

The RISC-V ISA has pursued minimalism to a fault. There is a large emphasis on minimizing instruction count, normalizing encoding, etc. This pursuit of minimalism has resulted in false orthogonalities (such as reusing the same instruction for branches, calls and returns) and a requirement for superfluous instructions which impacts code density both in terms of size and

  
## kOS.md

      
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              2 forks
            
          
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              26 stars
            
          
                chrispsn
                / kOS.md
            
            
              Last active
              March 13, 2024 03:25
            
              
                A summary of everything we know about kOS.
              
          
    Official site (kparc.com)


Summary
Example programs
Updated (?) edit.k
~2014 older version that has more info
The project has been running since at least 2012

Articles


## microsoft_craziness.h
//
// Author:   Jonathan Blow
// Version:  1
// Date:     31 August, 2018
//
// This code is released under the MIT license, which you can find at
//
//          https://opensource.org/licenses/MIT
//
//

## stylish.css
/**
1. Install the Stylish(https://chrome.google.com/webstore/detail/stylish/fjnbnpbmkenffdnngjfgmeleoegfcffe?hl=en) extension for Chrome.
2. Open up extension options and paste the CSS mentioned below.
3. Specify the "URLs on the domain" to be `github.com`.
4. Add a title and save.
*/

.dashboard-sidebar {
    float: right;
    padding-right: 10px;

## tutorial.md

      
              1 file
            
          
              142 forks
            
          
              18 comments
            
          
              1253 stars
            
          
                swalkinshaw
                / tutorial.md
            
            
              Last active
              November 13, 2023 08:40
            
              
                Designing a GraphQL API
              
          
    Moved to Shopify/graphql-design-tutorial


## avx_sigh.md

      
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              66 stars
            
          
                rygorous
                / avx_sigh.md
            
            
              Last active
              September 21, 2023 07:33
            
          
why doesn't radfft support AVX on PC?

So there's two separate issues here: using instructions added in AVX and using 256-bit wide vectors. The former turns out to be much easier than the latter for our use case.
Problem number 1 was that you positively need to put AVX code in a separate file with different compiler settings (/arch:AVX for VC++, -mavx for GCC/Clang) that make all SSE code emitted also use VEX encoding, and at the time radfft was written there was no way in CDep to set compiler flags for just one file, just for the overall build.
[There's the GCC "target" annotations on individual funcs, which in principle fix this, but I ran into nasty problems with this for several compiler versions, and VC++ has no equivalent, so we're not currently using that and just sticking with different compilation units.]
The other issue is to do with CPU power management.

  
## Install_gcc7_ubuntu_16.04.md

      
              1 file
            
          
              38 forks
            
          
              14 comments
            
          
              122 stars
            
          
                jlblancoc
                / Install_gcc7_ubuntu_16.04.md
            
            
              Last active
              October 10, 2023 03:09
            
              
                Installing gcc-7 & g++-7 in Ubuntu 16.04LTS Xenial
              
          
    Run the following in the terminal:
Install the gcc-7 packages:
sudo apt-get install -y software-properties-common
sudo add-apt-repository ppa:ubuntu-toolchain-r/test
sudo apt update
sudo apt install g++-7 -y

Set it up so the symbolic links gcc, g++ point to the newer version:

  
## grecaptcha.kt
package utils

import org.w3c.dom.HTMLElement

@JsName("grecaptcha")
external object GoogleRecaptcha {
	fun render(element: HTMLElement, options: RecaptchaOptions)
}

class RecaptchaOptions(val sitekey: String, val callback: String, val size: String)

## anonymous
1. Install user CSS extension (or similar): https://chrome.google.com/webstore/detail/user-css/okpjlejfhacmgjkmknjhadmkdbcldfcb?hl=en
2. Apply the following style to news.ycombinator.com

.c00, .c00 a:link { color:#000000; }
.c5a, .c5a a:link, .c5a a:visited { color:#000000; }
.c73, .c73 a:link, .c73 a:visited { color:#000000; }
.c82, .c82 a:link, .c82 a:visited { color:#000000; }
.c88, .c88 a:link, .c88 a:visited { color:#000000; }
.c9c, .c9c a:link, .c9c a:visited { color:#000000; }
.cae, .cae a:link, .cae a:visited { color:#000000; }

## scanner.sh
# use ImageMagick convert
# the order is important. the density argument applies to input.pdf and resize and rotate to output.pdf
convert -density 90 input.pdf -rotate 0.5 -attenuate 0.2 +noise Multiplicative -colorspace Gray output.pdf
	//
	// Author: Jonathan Blow
	// Version: 1
	// Date: 31 August, 2018
	//
	// This code is released under the MIT license, which you can find at
	//
	// https://opensource.org/licenses/MIT
	//
	//
	/**
	1. Install the Stylish(https://chrome.google.com/webstore/detail/stylish/fjnbnpbmkenffdnngjfgmeleoegfcffe?hl=en) extension for Chrome.
	2. Open up extension options and paste the CSS mentioned below.
	3. Specify the "URLs on the domain" to be `github.com`.
	4. Add a title and save.
	*/

	.dashboard-sidebar {
	float: right;
	padding-right: 10px;
	package utils

	import org.w3c.dom.HTMLElement

	@JsName("grecaptcha")
	external object GoogleRecaptcha {
	fun render(element: HTMLElement, options: RecaptchaOptions)
	}

	class RecaptchaOptions(val sitekey: String, val callback: String, val size: String)
	1. Install user CSS extension (or similar): https://chrome.google.com/webstore/detail/user-css/okpjlejfhacmgjkmknjhadmkdbcldfcb?hl=en
	2. Apply the following style to news.ycombinator.com

	.c00, .c00 a:link { color:#000000; }
	.c5a, .c5a a:link, .c5a a:visited { color:#000000; }
	.c73, .c73 a:link, .c73 a:visited { color:#000000; }
	.c82, .c82 a:link, .c82 a:visited { color:#000000; }
	.c88, .c88 a:link, .c88 a:visited { color:#000000; }
	.c9c, .c9c a:link, .c9c a:visited { color:#000000; }
	.cae, .cae a:link, .cae a:visited { color:#000000; }
	# use ImageMagick convert
	# the order is important. the density argument applies to input.pdf and resize and rotate to output.pdf
	convert -density 90 input.pdf -rotate 0.5 -attenuate 0.2 +noise Multiplicative -colorspace Gray output.pdf