replace inst fn calls with fake-macros
remove fp stuff
remove unused syscall stuff
prep for removing try/catch
now at 3.3 MIPS
push fixes into inst_src
add warning about editing inst.js
4 MIPS
4.6 MIPS, TLB now Uint32Array
4.7 MIPS - move around HTIF
move around some code
5.7 MIPS
6.2 MIPS - main mem is Uint32 instead of Uint8
remove unused syscall stuff, cleanup
cleanup 64 bit sign ext