I mean this is great and all but why do we really need N64 emulation on the Nintendo 3DS? Most of Nintendo 64's greatest games could already be played on the Nintendo 3DS through the superior remasters that were made.
Legend of Zelda Ocarina of time- We literally have a Nintendo 3DS remake of this game that is superior to the original.
Legend of Zelda Majora's mask- Same thing we have a superior port
Mario Kart 64- We have our very own Mario Kart 7 game on the 3DS that has much better graphics and gameplay than the 64 version.
Super Mario 64- As the 3DS is backwards compatible with the original DS we could always play Super Mario 64 DS which has updated visuals.
Super Smash Bros- We have a Super Smash Bros game on the 3DS with arguably better visuals and more characters.
Donkey Kong Country- We have the Wii port which is great
Diddy Kong Racing- We have the Nintendo DS version we could natively play.
Rayman 2- Was already remade on the 3DS as Rayman 3DS
Goldenye 64- We have a superior version of this game already on the Wii. I believe it was also remade on the DS so you can play that.