Abstract-VM

Project from C++ branch in school 42

Abstract-VM is the virtual machine that can interpret programs written in a basic assembly language.

That programme is just do the arithmetic and some compare operations with two first values on the stack. Seems like a UNIX command dc.

Assemply language

Very simple assembler language that a virtual machine understands. Otherwise, the programme will throw an exception.

Instruction	Details
push value	Pushes the value at the top of the stack. The value must have one of the following form: int8(n) : Creates an 8-bit integer with value n. int16(n) : Creates a 16-bit integer with value n. int32(n) : Creates a 32-bit integer with value n. float(z) : Creates a float with value z. double(z) : Creates a double with value z.
pop	Unstacks the value from the top of the stack.
dump	Displays each value of the stack, from the most recent one to the oldest one.
assert value	Asserts that the value at the top of the stack is equal to the one passed as parameter for this instruction.
more value	Asserts that the value at the top of the stack is less to the one passed as parameter for this instruction.
less value	Asserts that the value at the top of the stack is more to the one passed as parameter for this instruction.
add	Unstacks the first two values on the stack, adds them together and stacks the result.
sub	Unstacks the first two values on the stack, subtracts them, then stacks the result.
mul	Unstacks the first two values on the stack, multiplies them, then stacks the result.
div	Unstacks the first two values on the stack, divides them, then stacks the result.
mod	Unstacks the first two values on the stack, calculates the modulus, then stacks the result.
print	Asserts that the value at the top of the stack is an 8-bit integer. (If not, exception will be thrown), then interprets it as an ASCII value and displays the corresponding character on the standard output.
max	Prints the maximum value on the stack.
min	Prints the minimum value on the stack.
debug	Prints the information about how many and which types on the stack.
exit	Terminate the execution of the current program.
Some additional comments	Comments start with a ’;’ and finish with a newline.

Usage Examples

Read from standard input. To end input enter - ’;;’ special symbol.

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Read from file.

more info