SVM

Swap Virtual Machine bytecode interpreter.

Available Virtual Registers

NOTES:

• All registers have a datatype of UInt64 (unsigned long long) and are initialized to a value of 0 (0x0000000000000000)
• While you can use each register for any operation, some recommended uses (conventions) are listed in the table below

Register	Recommended Use
GA	General purpose
GB	General purpose
GC	General purpose
GD	General purpose
GE	General purpose
GF	General purpose
CA	Loop counter
IA	Intermediate operation data storage
IB	Intermediate operation data storage
IC	Intermediate operation data storage
ID	Intermediate operation data storage

Supported Instructions

NOTES:

• Unless otherwise noted, boolean results are pushed onto the stack as true or false
• Unless otherwise noted, math opcodes remove the two topmost stack elements and place the result onto the top of the stack
• Unless otherwise noted, logic opcodes (LT, GT, etc.) Pop the two topmost elements on the stack and emplace a boolean result on the top of the stack
• Bitwise opcodes support the following data types: n, b, standing for number and boolean
• All stack elements that undergo processing in the same opcode must be the same data type

Bytecode Identifier	Opcode Symbol	Arguments	Description
0	LOG	none	Add a log entry to blockchain storage (in the future; currently prints to console)
1	RETURN	none	Halt code execution and return output data
2	SELFDESTRUCT	none	Halt execution and mark smart contract for destruction (IRREVERSIBLE! Use with caution)
3	PUSH	<element>	Push an element onto the program stack
4	POP	none	Remove the top-most element from the program stack
5	SSTORE	<id>,<element>	Store an element with identifier <id> in blockchain storage
6	SLOAD	<id>	Get an element with identifier <id> from blockchain storage and emplace it onto the stack
7	MSIZE	none	Emplace the size of the stack (in bytes; calculated before this operation) onto the stack
8	ADD	none	Addition
9	SUB	none	Subtraction
10	MUL	none	Multiplication
11	DIV	none	Division
12	MOD	none	Modulo
13	POW	none	Exponentiation
14	STOP	none	Halt program execution immediately
15	JMP	<instruction_index>	Jump to the specified opcode index, removing the <instruction_index> argument pushed to the stack in the process.
16	JMPI	<instruction_index>	Jump to the specified opcode index if the topmost element (before <instruction_index> is pushed onto the stack as a parameter) on the stack evaluates to true, removing the <instruction_index> argument pushed to the stack in the process.
17	LT	none	Less Than
18	GT	none	Greater Than
19	EQ	none	Equal To
20	LOR	none	Logical OR
21	LNOT	none	Logical NOT; Only checks the topmost element in the stack
22	OR	<data_type>	Bitwise OR
23	NOT	<data_type>	Bitwise NOT
24	XOR	<data_type>	Bitwise XOR
25	SETREG	<register>,<value>	Set register <register> to a value of <value>
26	GETREG	<register>	Get the value of the register <register>
27	INCREG	<register>	Increment the value of the register <register> by one