add Alchemy memory access and sign-extend opcodes
tree6da732233021437c09b1abcddcd27534bf910873
-rw-r--r-- 10 .gitignore
-rw-r--r-- 454 README
drwxr-xr-x - asm
drwxr-xr-x - compile
drwxr-xr-x - file
drwxr-xr-x - lib
drwxr-xr-x - test