movfuscator
"The single instruction C compiler"
https://github.com/xoreaxeaxeax/movfuscator
...In other words, yes, it is possible to write a complete compiler which creates all of its compiled code by using only one single type of x86 instruction...
Also, this might be interesting:
https://en.wikipedia.org/wiki/One-instruction_set_computer
>"A one-instruction set computer (OISC), sometimes called an ultimate reduced instruction set computer (URISC), is an abstract machine that uses only one instruction – obviating the need for a machine language opcode.[1][2][3] With a judicious choice for the single instruction and given infinite resources, an OISC is capable of being a universal computer in the same manner as traditional computers that have multiple instructions.[2]:55 OISCs have been recommended as aids in teaching computer architecture[1]:327[2]:2 and have been used as computational models in structural computing research.[3]"