satmandu

#!/bin/bash -x
# make_arm64_rpi_kernel_debs.sh
# Builds arm64 debian packages from the CURRENT rpi firmware repository kernel which is installed by:
# sudo rpi-update
# This runs on an arm64 host with arm64 compilation tools... 
# or with some sort of cross-compilation setup.
# Debs are put in $workdir/build
#
# This will NOT work in Raspbian unless you have an arm64 compilation
# environment setup. Appears to work on

tnishinaga

OpenOCD config for Raspberry Pi 4

OpenOCD version

0.10.0+dev-00865-g04ebb43f

How to use

openocd -f interface/YOUR_INTERFACE_CONFIG -f raspi4.cfg

erincandescent

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

shuuji3

#!/usr/bin/env python3

import numpy as np

# Assume that P = N * N.
N = 4

A = np.arange(0, 2 * N * N, 2).reshape(N, N)
B = np.arange(1, 2 * N * N, 2).reshape(N, N)
C_gt = A.dot(B)

Ishotihadus

ATR 音素バランス 503 文元ネタ集

判明している音素バランス文の元ネタを集めた。

Subset A

a01: あらゆる現実をすべて自分のほうへねじ曲げたのだ。

「マルサの女 撮影日記」（伊丹十三）（文藝春秋 1987 年 2 月）（c03、g01 と同一）

tanakamura

/* 
 * clzero の後にstoreするとmemsetよりはるかに悪くなる 
 *
 *  * clzeroのみ      :30[GB/s] 
 *  * clzero + ストア :3[GB/s]
 *  * memset          :12.5[GB/s]
 */
void *amd_clzero(void *dst, const void *src, size_t sz)
{
    size_t line_size = 64;

wakita

SDK = xcrun -sdk macosx

all: compute.metallib compute

compute.metallib: Compute.metal
	# Metal intermediate representation (.air)
	$(SDK) metal -c -Wall -Wextra -std=osx-metal2.0 -o /tmp/Compute.air $^
	# Metal library (.metallib)
	$(SDK) metallib -o $@ /tmp/Compute.air

pixelomer

#!/usr/bin/env sh

#############################################
#                  WARNING                  #
# No more commits are going to be made to   #
# this gist. Please get the latest script   #
# from the new repository:                  #
# https://github.com/pixelomer/macos-mkjail #
#############################################

bennuttall

# Copyright (c) 2017: Rich Wareham, Simon Byrne
# Available under the MIT "Expat" license.

using Colors
using SenseHat

const LED = led_matrix()

function julia(z, c)
    maxit = 50

yvt

// public domain
//
// benchmark @ 3.5 GHz (i5-4690) Intel Core i5:
//
//   1,709,401,709 points/sec w/AVX2 + FMA
//   1,373,390,557 points/sec w/AVX2
//     382,043,935 points/sec w/o AVX2
//
#include <cstdio>
#include <cstdint>