ussua bytecode project C++ porting.

instruction set: [link]

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opcode	hex	description	operand	notation	extended
NOOP	0x00	Noop

opcode	hex	description	operand	notation	extended
PUSH	0x01	Push stack	Value	stack <- operand
STORE	0x02	Pop stack, store in heap	Heap address	heap[address] = stack:pop
LOAD	0x03	Load from heap, push to stack	Heap address	stack <- heap[operand]
SWAP	0x04	Swap two values ​​on the stack		x = stack:pop, y = stack:pop, stack <- x, stack <- y	O

opcode	hex	description	operand	notation	extended
ADD	0x10	Pop and add two values in the stack and push the values to the stack		stack <- stack:pop + stack:pop
SUB	0x11	Pop and subtract two values in the stack and push the values to the stack		stack <- stack:pop - stack:pop
MUL	0x12	Pop and multiple two values in the stack and push the values to the stack		stack <- stack:pop * stack:pop
DIV	0x13	Pop and divide two values in the stack and push the values to the stack		stack <- stack:pop / stack:pop
MOD	0x14	Pop and modulus two values in the stack and push the values to the stack		stack <- stack:pop % stack:pop

opcode	hex	description	operand	notation	extended
AND	0x18	Pop and and logical operation two values in the stack and push the values to the stack		stack <- stack:pop && stack:pop
OR	0x19	Pop and or logical operation two values in the stack and push the values to the stack		stack <- stack:pop || stack:pop
XOR	0x1A	Pop and xor logical operation two values in the stack and push the values to the stack		stack <- stack:pop ^ stack:pop
NOT	0x1B	Pop and not logical operation value in the stack and push the values to the stack		stack <- !stack:pop
LSF	0x1C	Pop and left shift values in the stack and push the values to the stack		stack <- stack:pop << stack:pop
RSF	0x1D	Pop and right shift values in the stack and push the values to the stack		stack <- stack:pop << stack:pop

opcode	hex	description	operand	notation	extended
EQ	0x20	Pop and compare values equally in the stack and if true, push 1 to the stack		stack <- stack:pop == stack:pop
GT	0x21	Pop and compare if the first value is greater than the second, and if true, push 1 to the stack		stack <- stack:pop > stack:pop
LT	0x22	Pop and compare if the first value is less than the second, and if true, push 1 to the stack		stack <- stack:pop < stack:pop
GTE	0x23	Pop and compare if the first value is greater than or equal to the second, and if true, push 1 to the stack		stack <- stack:pop >= stack:pop
LTE	0x24	Pop and compare if the first value is less than or equal to the second, and if true, push 1 to the stack		stack <- stack:pop <= stack:pop

opcode	hex	description	operand	notation	extended
PROC	0x28	Specify the length of the procedure, skip this length and execute. this instruction is used later when it is executed through CALL	Length of the procedure	ptr = ptr + operand + 1(PROC)
CALL	0x29	Backup the current pointer to the callstack and jump it to the pointer of the procedure (PROC)	Pointer of the procedure instruction	callstack <- ptr, ptr = operand + 1
RET	0x2A	Return to the pointer backed up to callstack		ptr = callstack:pop

opcode	hex	description	operand	notation	extended
JMP	0x2C	Jump to the pointer	Pointer	ptr = operand
JIF	0x2D	Pop the stack, and if the value is 0 (false), jump to the pointer	Pointer	if (stack:pop == 0) ptr = operand