diff options
Diffstat (limited to 'ROMs/hello_c.asm')
| -rw-r--r-- | ROMs/hello_c.asm | 35 |
1 files changed, 16 insertions, 19 deletions
diff --git a/ROMs/hello_c.asm b/ROMs/hello_c.asm index 761f32b..bdb32ff 100644 --- a/ROMs/hello_c.asm +++ b/ROMs/hello_c.asm @@ -1,24 +1,21 @@ jmp _main -_add_int_a__int_b: ; int add(int a, int b) - pop V0 ; Pop return address to register, to preserve during parameter access - pop [$51FF] ; param int a - pop [$5201] ; param int b - push V0 ; Restore function return address - push [$51FF] ; left operand - mov [$5201], V1 ; right operand - pop V0 ; get left operand back - add V0, V1 ; compute addition - mov AX, V0 ; return value - ret - mov 0, V0 ; fallback return 0 - ret - _main: ; int main() - push 2 ; arg int a - push 1 ; arg int b - call _add_int_a__int_b ; int add(int a, int b) - mov V0, V0 ; return value - ret + mov 1, [$51FF] ; int x = 1 + mov 0, [$5201] ; int i = 0 +_body_1: + push [$5201] ; left operand + mov 10, V1 ; right operand + pop V0 ; get left operand back + lt V0, V1 ; compute less than check + not LX + bz + jmp _end_2 ; if for condition fails, jump to end + mult [$51FF], 2 ; compute multiplication + mov AX, [$51FF] ; store back into left param + push [$5201] ; i++ + inc [$5201] + pop V0 +_end_2: mov 0, V0 ; fallback return 0 ret |