As of
4.0-2729 Dolphin now had accurate fmuls/fmadd emulation in the JIT and Interpreter. What does that mean? It more or less means that collision detection (Super Mario Galaxy 2, getting stuck on some corners for example) and physics issues (Mario Kart Wii/Double Dash with landing/turning) should be accurate to console, rather than having their own set of issues for Dolphin.
This should affect a ton of games in a very, very positive way. Clipping tricks that didn't work on Dolphin should work, physics should be more accurate, and of course, games with replay functionality will sync up with console. We've verified replays in Donkey Kong Country Returns (Superplay functionality), along with Mario Kart Wii, Double Dash!!, Super Smash Bros Brawl and F-Zero GX (Replay functionality in each game) with replays recorded on console played on emulator successfully, and then a replay recorded on emulator verified on console.
Less exciting for TASers is that this also means that dolphin
in theory should will sync up in lockstep games with Console, such as Wifi mode in Super Smash Bros. Brawl, and BBA titles such as Kirby Air Ride and Mario Kart Double Dash!!