frost

A virtual machine written in C++.

fasm.py: assembler script (frost asm -> binary)
fvm: virtual machine which executes binary instructions

usage: python3 fasm.py <file.fasm> | ./build/fvm

frost asm specification

Category	Mnemonic	Opcode	Sub-Op / Flag	Operands
Special	NOP	`0x0`	`0x0`	—
	HALT	`0x0`	`0x1`	—
	TRAP	`0x0`	`0x2`	`TRAPVEC24`
	CALL	`0x0`	`0x3`	`BASE_R, OFF16`
	RET	`0x0`	`0x4`	—
Integer ALU (RRR)	ADD	`0x1`	`0x0`	`DR, SR1, SR2`
	SUB	`0x1`	`0x1`	`DR, SR1, SR2`
	AND	`0x1`	`0x2`	`DR, SR1, SR2`
	OR	`0x1`	`0x3`	`DR, SR1, SR2`
	XOR	`0x1`	`0x4`	`DR, SR1, SR2`
Integer Immediate (RRI)	ADDI	`0x2`	`0x0`	`DR, SR, IMM16`
	ANDI	`0x2`	`0x1`	`DR, SR, IMM16`
	ORI	`0x2`	`0x2`	`DR, SR, IMM16`
	XORI	`0x2`	`0x3`	`DR, SR, IMM16`
	SUBI	`0x2`	`0x4`	`DR, SR, IMM16`
Memory	LDB	`0x3`	`0x1`	`DR, BASE_R, OFF16`
	LDBZ (zero-ext)	`0x3`	`0x2`	`DR, BASE_R, OFF16`
	LDW	`0x3`	`0x3`	`DR, BASE_R, OFF16`
	LDWZ (zero-ext)	`0x3`	`0x4`	`DR, BASE_R, OFF16`
	STB	`0x3`	`0x5`	`DR, BASE_R, OFF16`
	STW	`0x3`	`0x6`	`DR, BASE_R, OFF16`
	LEA	`0x3`	`0x7`	`DR, SR1, SR2, OFF12`
Jump	JMP	`0x4`	`0x0`	`BASE_R, OFF16`
	JE	`0x4`	`0x1`	`BASE_R, OFF16`
	JNE	`0x4`	`0x2`	`BASE_R, OFF16`
	JL	`0x4`	`0x3`	`BASE_R, OFF16`
	JG	`0x4`	`0x4`	`BASE_R, OFF16`
	JGE	`0x4`	`0x5`	`BASE_R, OFF16`
	JLE	`0x4`	`0x6`	`BASE_R, OFF16`
Stack	PUSH	`0x5`	`0x0`	`SR`
	POP	`0x5`	`0x1`	`DR`

Name		Name	Last commit message	Last commit date
Latest commit History 24 Commits
assets		assets
src		src
tests		tests
.gitignore		.gitignore
CMakeLists.txt		CMakeLists.txt
README.md		README.md
fasm.py		fasm.py
puts.fasm		puts.fasm
test.fasm		test.fasm
test2.fasm		test2.fasm