| 1 | #include <stdio.h> |
| 2 | #include <lightning.h> |
| 3 | |
| 4 | static jit_state_t *_jit; |
| 5 | |
| 6 | typedef void (*pvfi)(int); /* Pointer to Void Function of Int */ |
| 7 | |
| 8 | int main(int argc, char *argv[]) |
| 9 | { |
| 10 | pvfi myFunction; /* ptr to generated code */ |
| 11 | jit_node_t *start, *end; /* a couple of labels */ |
| 12 | jit_node_t *in; /* to get the argument */ |
| 13 | |
| 14 | init_jit(argv[0]); |
| 15 | _jit = jit_new_state(); |
| 16 | |
| 17 | start = jit_note(__FILE__, __LINE__); |
| 18 | jit_prolog(); |
| 19 | in = jit_arg(); |
| 20 | jit_getarg(JIT_R1, in); |
| 21 | jit_prepare(); |
| 22 | jit_pushargi((jit_word_t)"generated %d bytes\n"); |
| 23 | jit_ellipsis(); |
| 24 | jit_pushargr(JIT_R1); |
| 25 | jit_finishi(printf); |
| 26 | jit_ret(); |
| 27 | jit_epilog(); |
| 28 | end = jit_note(__FILE__, __LINE__); |
| 29 | |
| 30 | myFunction = jit_emit(); |
| 31 | |
| 32 | /* call the generated code, passing its size as argument */ |
| 33 | myFunction((char*)jit_address(end) - (char*)jit_address(start)); |
| 34 | jit_clear_state(); |
| 35 | |
| 36 | jit_disassemble(); |
| 37 | |
| 38 | jit_destroy_state(); |
| 39 | finish_jit(); |
| 40 | return 0; |
| 41 | } |