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Update README.md with list of assembler instructions

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Bartłomiej Przemysław Pluta
2021-11-02 18:12:01 +01:00
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# MVM
## MVM Architecture
List of available instructions:
| Op. code | Op. mnemo | Description |
|:--------:|:-----------|:-------------------------------------------------------------------------------|
| ``0x00`` | ``NOP`` | No operation |
| ``0x01`` | ``HALT`` | Stop the program execution |
| ``0x02`` | ``PUSH x`` | Push number to stack |
| ``0x03`` | ``POP`` | Pop number from a stack |
| ``0x04`` | ``DUP`` | Duplicate the top stack element |
| ``0x05`` | ``SWAP`` | Swap first and second stack elements |
| ``0x06`` | ``ADD`` | Pop 1st and 2nd stack elements, add them and push to stack |
| ``0x07`` | ``SUB`` | Pop 1st and 2nd stack elements, subtract them and push to stack |
| ``0x08`` | ``MUL`` | Pop 1st and 2nd stack elements, multiply them and push to stack |
| ``0x09`` | ``DIV`` | Pop 1st and 2nd stack elements, divide them and push to stack |
| ``0x0A`` | ``NEG`` | Negate the top stack element |
| ``0x0B`` | ``NOT`` | Pop top stack element. If it's equal to ``0`` then push ``1``, else push ``0`` |
| ``0x0C`` | ``CALL x`` | Jump to the ``x`` address and push new stack frame |
| ``0x0D`` | ``RET`` | Return to the caller and pop the stack frame |
| ``0x0E`` | ``JMP x`` | Perform the unconditional jump to ``x`` address |
| ``0x0F`` | ``JE x`` | Jump to ``x`` **if** top element ``== 0`` |
| ``0x10`` | ``JNE x`` | Jump to ``x`` **if** top element ``!= 0`` |
| ``0x11`` | ``JG x`` | Jump to ``x`` **if** top element ``> 0 `` |
| ``0x12`` | ``JL x`` | Jump to ``x`` **if** top element ``< 0 `` |
| ``0x13`` | ``JGE x`` | Jump to ``x`` **if** top element ``>= 0`` |
| ``0x14`` | ``JLE x`` | Jump to ``x`` **if** top element ``<= 0`` |
| ``0x15`` | ``LD x`` | Push local variable to stack |