Stakc

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Stakc (pronounced "Stacks") - is a Stack-based Virtual machine (VM), which is intended as an intermediate representation (IR) between a high-level, non-esoteric language and an esoteric one.

Documentation

VM uses Reverse Polish Notation (or postfix) as well as a Stack, which can also be used as a RAM. At the moment it has following commands:

FALSE - push false
TRUE - push true
PUSH x - push number x
POP - pop
GET x - push value of the stack from index x to 
the top
STORE x - pop top of the stack and store it at 
index x
GET_TOP - pop an index and push value from that 
index
STORE_TOP - pop top of the stack and index and 
store value in that index
START_IF - if top is true
CLOSE_IF - closes if body (used if there is an 
else block)
END_IF - end if
START_ELSE - starts else
OUT - outputs top of the stack as a number
OUT_CHAR - outputs top of the stack as a 
character
IN - input a number and store it at the top
IN_CHAR - input a character and store it at the 
top
START_WHILE - while true
END_WHILE - end while
ADD - pop top two values and add them
SUB - pop top two values and subtract them
EQ, GT, LT, GE, LE, NE - pop top two values, 
compare them, and push FALSE or TRUE
LBL x - declare label x
JMP x - jump to label x
JMP_TRUE x - jump if true
NOT - NOT top of the stack