VirtualMachine
Stack-based virtual machine. Version 1.0.4.
Pseudo instructions
| Code |
Instruction |
| 0x11 |
";" (comment) |
| 0x22 |
"labl" (label) |
Null instructions
| Code |
Instruction |
| 0xAA |
(void string) |
| 0xBB |
(undefined code) |
Main instructions
| Bytecode |
Stack |
Args |
Instruction |
| 0x0A |
0 |
1 |
push |
| 0x0B |
1 |
0 |
pop |
| 0x0C |
1 |
0 |
inc |
| 0x0D |
1 |
0 |
dec |
| 0x0E |
3 |
0 |
jg |
| 0x0F |
3 |
0 |
je |
| 0x1A |
1 |
0 |
jmp |
| 0x1B |
2 |
0 |
stor |
| 0x1C |
1 |
0 |
load |
| 0x1D |
1 |
0 |
call |
| 0x1E |
0 |
0 |
hlt |
Interface functions
extern int cvm_compile(FILE *output, FILE *input);
extern int cvm_load(uint8_t *memory, int32_t msize);
extern int cvm_run(int32_t **output, int32_t *input);
Additional instructions
| Bytecode |
Stack |
Args |
Instruction |
| 0xA0 |
2 |
0 |
add |
| 0xB0 |
2 |
0 |
sub |
| 0xC0 |
2 |
0 |
mul |
| 0xD0 |
2 |
0 |
div |
| 0xE0 |
2 |
0 |
mod |
| 0xF0 |
2 |
0 |
shr |
| 0xA1 |
2 |
0 |
shl |
| 0xB1 |
2 |
0 |
xor |
| 0xC1 |
2 |
0 |
and |
| 0xD1 |
2 |
0 |
or |
| 0xE1 |
1 |
0 |
not |
| 0xF1 |
3 |
0 |
jl |
| 0xA2 |
3 |
0 |
jne |
| 0xB2 |
3 |
0 |
jle |
| 0xC2 |
3 |
0 |
jge |
| 0xD2 |
1 |
0 |
allc |
Compile and run
$ make install
> git clone https://github.com/number571/extclib.git
$ make
> gcc -o cvm -Wall -std=c99 cvm.c cvmkernel.c extclib/type/stack.c extclib/type/hashtab.c extclib/type/list.c
> ./cvm build main.vms -o main.vme
> ./cvm run main.vme
>
{
"result": [50],
"return": 0
}
Example: mul5 function (assembly code)
labl _start
push begin
jmp
; main
labl begin
; mul5(x) = x * 5
; where x = 10
push 10
push mul5
call
push end
jmp
; exit
labl end
hlt
; x = arg[1]
labl mul5
; y = x * 5
push -2
load
push 5
mul
; x = y
push -1
push -3
stor
; return
pop
jmp
Example: mul5 function (binary code)
0a00 0000 061a 0a00 0000 0a0a 0000 0018
1d0a 0000 0017 1a1e 0aff ffff fe1c 0a00
0000 05c0 0aff ffff ff0a ffff fffd 1b0b
1a
cvm copied to clipboard
number571
number571