Andy Wingo

North Carolina (USA), 1980

Hacker.

Latest Updates

Andy Wingo 09/11/2014

ffconf 2014

Last week I had the great privilege of speaking at ffconf in Brighton, UK. It was lovely. The town put on a full demonstration of its range of November weather patterns, from blue skies to driving rain to hail (!) to sea-spray to drizzle and back again....

Andy Wingo 02/09/2014

high-performance packet filtering with pflua

I'm delighted to be able to announce the release of Pflua, a high-performance packet filtering toolkit written in Lua.Pflua implements the well-known libpcap packet filtering language, which we call pflang for short.Unlike other packet filtering...

Andy Wingo 25/08/2014

revisiting common subexpression elimination in guile

A couple years ago I wrote about a common subexpression pass that I implemented in Guile 2.0.To recap, Guile 2.0 has a global, interprocedural common subexpression elimination (CSE) pass.In the context of compiler optimizations, "global" means that it...

Andy Wingo 18/08/2014

on gnu and on hackers

Greetings, gentle hackfolk. 'Tis a lovely waning light as I write this here in Munich, Munich the green, Munich full of dogs and bikes, Munich the summer-fresh.Last weekend was the GNU hackers meeting up in Garching, a village a few metro stops...

Andy Wingo 01/07/2014

flow analysis in guile

Greets, and welcome back to the solipsism! I've been wandering the wilderness with my Guile hackings lately, but I'm finally ready to come back to civilization. Hopefully you will enjoy my harvest of forest fruit. Today's article is about...

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Merge pull request #119 from Igalia/kbarone

Merge pull request #119 from Igalia/kbarone Add Katerina as author.

Andy Wingo29/01/2015

Add Katerina as author.

Add Katerina as author.

Andy Wingo29/01/2015

Merge pull request #117 from Igalia/htons-inversion

Merge pull request #117 from Igalia/htons-inversion Fix "inversion" optimization for ntohs

Andy Wingo29/01/2015

Fix "inversion" optimization for ntohs

Fix "inversion" optimization for ntohs * src/pf/optimize.lua (try_invert): We can "invert" a ntohl because its argument, result, and the comparison are in the same group. This is not the case for "ntohs" because it truncates the incoming 32-bit ...

Andy Wingo29/01/2015

Merge pull request #116 from Igalia/range-inference

Merge pull request #116 from Igalia/range-inference Fix range inference bugs with division and other ops

Andy Wingo29/01/2015