1 #include "sljitLir.h"
2
3 #include <stdio.h>
4 #include <stdlib.h>
5
6 typedef long SLJIT_CALL (*func3_t)(long a, long b, long c);
7
print_num(long a)8 static long SLJIT_CALL print_num(long a)
9 {
10 printf("a = %ld\n", a);
11 return a + 1;
12 }
13
14 /*
15 This example, we generate a function like this:
16
17 long func(long a, long b, long c)
18 {
19 if ((a & 1) == 0)
20 return print_num(c);
21 return print_num(b);
22 }
23 */
24
func_call(long a,long b,long c)25 static int func_call(long a, long b, long c)
26 {
27 void *code;
28 unsigned long len;
29 func3_t func;
30
31 struct sljit_jump *out;
32 struct sljit_jump *print_c;
33
34 /* Create a SLJIT compiler */
35 struct sljit_compiler *C = sljit_create_compiler();
36
37 sljit_emit_enter(C, 0, 3, 1, 3, 0, 0, 0);
38
39 /* a & 1 --> R0 */
40 sljit_emit_op2(C, SLJIT_AND, SLJIT_R0, 0, SLJIT_S0, 0, SLJIT_IMM, 1);
41 /* R0 == 0 --> jump print_c */
42 print_c = sljit_emit_cmp(C, SLJIT_EQUAL, SLJIT_R0, 0, SLJIT_IMM, 0);
43
44 /* R0 = S1; print_num(R0) */
45 sljit_emit_op1(C, SLJIT_MOV, SLJIT_R0, 0, SLJIT_S1, 0);
46 sljit_emit_ijump(C, SLJIT_CALL1, SLJIT_IMM, SLJIT_FUNC_OFFSET(print_num));
47
48 /* jump out */
49 out = sljit_emit_jump(C, SLJIT_JUMP);
50 /* print_c: */
51 sljit_set_label(print_c, sljit_emit_label(C));
52
53 /* R0 = c; print_num(R0); */
54 sljit_emit_op1(C, SLJIT_MOV, SLJIT_R0, 0, SLJIT_S2, 0);
55 sljit_emit_ijump(C, SLJIT_CALL1, SLJIT_IMM, SLJIT_FUNC_OFFSET(print_num));
56
57 /* out: */
58 sljit_set_label(out, sljit_emit_label(C));
59 sljit_emit_return(C, SLJIT_MOV, SLJIT_R0, 0);
60
61 /* Generate machine code */
62 code = sljit_generate_code(C);
63 len = sljit_get_generated_code_size(C);
64
65 /* Execute code */
66 func = (func3_t)code;
67 printf("func return %ld\n", func(a, b, c));
68
69 /* dump_code(code, len); */
70
71 /* Clean up */
72 sljit_free_compiler(C);
73 sljit_free_code(code);
74 return 0;
75 }
76
main()77 int main()
78 {
79 return func_call(4, 5, 6);
80 }
81