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David P. Sanders dpsanders

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View sqrt_tests.jl
using BenchmarkTools, Random
Random.seed!(123)
BenchmarkTools.DEFAULT_PARAMETERS.time_tolerance = 1.0e-11 # may or may not matter
BenchmarkTools.DEFAULT_PARAMETERS.evals = 1 # important
#==
alternative implementation of square root.
#aproximation of the square root using the float representation as a trick
used in providing an initial value for calculations of square roots.
@ericphanson
ericphanson / IntervalSpecialFunctions.jl
Last active Dec 11, 2019
IntervalOptimisation problem benchmark
View IntervalSpecialFunctions.jl
# This file contains code taken from https://github.com/JuliaIntervals/IntervalSpecialFunctions.jl
# which is available under the following MIT license:
# > Copyright (c) 2018: David Sanders.
# >
# > Permission is hereby granted, free of charge, to any person obtaining a copy
# > of this software and associated documentation files (the "Software"), to deal
# > in the Software without restriction, including without limitation the rights
# > to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# > copies of the Software, and to permit persons to whom the Software is
@c42f
c42f / fourier_isosurface.jl
Last active Aug 12, 2020
Makie.jl based visualization of 3D 1/f noise
View fourier_isosurface.jl
using Makie
using Meshing
using GeometryTypes
using ColorSchemes
using FFTW
using LinearAlgebra
using Random
using Interpolations
@kleinschmidt
kleinschmidt / Manifest.toml
Created Jan 31, 2019
psych301 (sensation and perception) fourier demos
View Manifest.toml
# This file is machine-generated - editing it directly is not advised
[[AbstractFFTs]]
deps = ["Compat", "LinearAlgebra"]
git-tree-sha1 = "8d59c3b1463b5e0ad05a3698167f85fac90e184d"
uuid = "621f4979-c628-5d54-868e-fcf4e3e8185c"
version = "0.3.2"
[[AssetRegistry]]
deps = ["Distributed", "JSON", "Pidfile", "SHA", "Test"]
View inverse_hash.jl
using Compat
# Original C version at https://naml.us/post/inverse-of-a-hash-function/
function inverse_hash(key::UInt64)
local tmp::UInt64
# Invert key = key + (key << 31)
tmp = key-(key<<31)
key = key-(tmp<<31)
@ScottPJones
ScottPJones / BigFloats.jl
Created Jun 22, 2016
WIP on BigFloat replacement
View BigFloats.jl
# This file is a part of Julia. License is MIT: http://julialang.org/license
module BigFloats
export
FloatRef,
setprecision,
BigFlt, Flt, Flt128, Flt256, Flt512
@bishboria
bishboria / springer-free-maths-books.md
Last active Oct 16, 2021
Springer made a bunch of books available for free, these were the direct links
@aspiers
aspiers / MSP-sqlite3.sh
Last active Aug 29, 2015
run SQL on MobileSheetsPro SQLite database
View MSP-sqlite3.sh
#!/bin/bash
#
# Handy script to allow surgery on MobileSheetsPro SQLite database
# from host computer via adb. This means you can use the full history
# and CLI features of a feature-complete modern shell, rather than
# the crippled crap which Android's "adb shell" gives you.
#
# Example:
#
# MSP-sqlite3.sh 'select * from Songs where Title like "%Foo%"'
View mxcsr.jl
function getmxcsr()
Base.llvmcall("""%ptr = alloca i32
call void @llvm.x86.sse.stmxcsr(i32 * %ptr)
%curval = load i32 * %ptr
ret i32 %curval""", UInt32, ())
end
function setmxcsr(u::UInt32)
Base.llvmcall("""%ptr = alloca i32
store i32 %0, i32 * %ptr
@grayclhn
grayclhn / macros.jl
Last active Jul 14, 2021
Utility macros and functions for Julia
View macros.jl
## Some useful and/or interesting Julia macros. I haven't seen many
## examples online, so I hope this might be useful for people trying
## to understand macros. Caveat Emptor; I don't understand them that
## well myself. Additions and improvements are more than welcome.
##
## Everything here is available under the MIT license (see bottom of
## file)
##
## - Gray Calhoun (@grayclhn) 10/17/2014