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Wladimir J. van der Laan laanwj

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import datetime
import bisect
import ephem
DAY = 1.0/29.33
(0.0/4.0 + DAY, '🌑', 'New moon'),
(1.0/4.0 - DAY, '🌒', 'Waxing crescent moon'),
(1.0/4.0 + DAY, '🌓', 'First quarter moon'),
View 0001-etnaviv-NEON-implementations-of-tiling-untiling.patch
From b12050e430f6bf37334dd7b6995dd8c97d8aa68a Mon Sep 17 00:00:00 2001
From: "Wladimir J. van der Laan" <>
Date: Thu, 13 Jul 2017 15:43:09 +0000
Subject: [PATCH] etnaviv: NEON implementations of tiling/untiling
Experiemental NEON implementation of tiling/untiling that adds
specialized NEON function for tiling 8, 16, 32 bit per element
4x4 tiles. To optimize memory read/write sizes, there are functions that
process multiple horizontically adjactent tiles as well. These
are automatically used for the part that consists of whole tiles.
import json
class notreallydict(dict):
def __init__(self, x):
dict.__init__(self, x)
self.x = x
def items(self):
return self.x
laanwj / fds.c
Created Nov 30, 2017
Check fd assignment
View fds.c
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
int main()
int fd = open("/dev/null", O_RDWR);
laanwj / gcabi.c
Created Nov 15, 2017
Extract GCABI json
View gcabi.c
arm-linux-gnueabihf-gcc -ggdb -g3 gcabi.c -o gcabi -I /.../galcore_headers/include_imx8_v6.2.3.129602 gcabi _gcsHAL_INTERFACE _gcoCMDBUF _gcsQUEUE > data/gcs_hal_interface_GCABI.json
#include <gc_abi.h>
struct _gcsHAL_INTERFACE x;
struct _gcoCMDBUF y;
struct _gcsQUEUE z;
laanwj /
Created Aug 25, 2017
a20x KGSL dump cmdbuf
# enable command stream dumping, clear kernel ringbuffer,
# write output to a file provided on the command line
# this can be converted to .rd using from
set -e
if [ "$(whoami)" != "root" ]; then
echo "This script needs to be executed as root"
exit 1
laanwj / neontile.c
Created Jul 13, 2017
Vivante tiling experiments in NEON
View neontile.c
/* Vivante tiling experiments in NEON
W.J. van der Laan 2017, MIT license
/* gcc neontile.c -o neontile -O2 -mfpu=neon */
#define _POSIX_C_SOURCE 200112L
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
laanwj /
Created Jun 15, 2017
Count statistics about connections for bitcoind RPC
#!/usr/local/bin/python3 [5/1819]
import sys
from test_framework.authproxy import AuthServiceProxy, JSONRPCException
import time
import os
datadir = os.path.join(os.getenv('HOME'), '.bitcoin')
with open(os.path.join(datadir,'.cookie'),'r') as f:
cookie =
laanwj /
Created Jun 5, 2017
Script to do backports (pull ids listed in to_backport.txt or command line) in order of merge, to minimize number of conflicts.
#!/usr/bin/env python3
Script to do backports (pull ids listed in to_backport.txt or command line) in order of merge,
to minimize number of conflicts.
import git
import re
import shlex
import subprocess
import os, sys
laanwj /
Last active Jun 6, 2019
Decrypt router configuration
#!/usr/bin/env python3
# W.J. van der Laan 2017, distributed under MIT license
import binascii
import base64
import json
import os, sys
from Crypto import Random
from Crypto.Cipher import AES
KEY = binascii.a2b_hex(b'fffffbffeffffbfffbbfffbfdbfff7ffffffffffffffdfffff7fffffbfffffff')
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