1 #include "sljitLir.h" 2 3 #include <stdio.h> 4 #include <stdlib.h> 5 6 typedef long SLJIT_CALL (*func_arr_t)(long *arr, long narr); 7 8 static long SLJIT_CALL print_num(long a) 9 { 10 printf("num = %ld\n", a); 11 return a + 1; 12 } 13 14 /* 15 This example, we generate a function like this: 16 17 long func(long *array, long narray) 18 { 19 long i; 20 for (i = 0; i < narray; ++i) 21 print_num(array[i]); 22 return narray; 23 } 24 25 */ 26 27 static int array_access(long *arr, long narr) 28 { 29 void *code; 30 unsigned long len; 31 func_arr_t func; 32 33 /* Create a SLJIT compiler */ 34 struct sljit_compiler *C = sljit_create_compiler(); 35 36 sljit_emit_enter(C, 0, 2, 1, 3, 0, 0, 0); 37 /* opt arg R S FR FS local_size */ 38 sljit_emit_op2(C, SLJIT_XOR, SLJIT_S2, 0, SLJIT_S2, 0, SLJIT_S2, 0); // S2 = 0 39 struct sljit_label *loopstart = sljit_emit_label(C); // loopstart: 40 struct sljit_jump *out = sljit_emit_cmp(C, SLJIT_GREATER_EQUAL, SLJIT_S2, 0, SLJIT_S1, 0); // S2 >= a --> jump out 41 42 sljit_emit_op1(C, SLJIT_MOV, SLJIT_R0, 0, SLJIT_MEM2(SLJIT_S0, SLJIT_S2), SLJIT_WORD_SHIFT);// R0 = (long *)S0[S2]; 43 sljit_emit_ijump(C, SLJIT_CALL1, SLJIT_IMM, SLJIT_FUNC_OFFSET(print_num)); // print_num(R0); 44 45 sljit_emit_op2(C, SLJIT_ADD, SLJIT_S2, 0, SLJIT_S2, 0, SLJIT_IMM, 1); // S2 += 1 46 sljit_set_label(sljit_emit_jump(C, SLJIT_JUMP), loopstart); // jump loopstart 47 sljit_set_label(out, sljit_emit_label(C)); // out: 48 sljit_emit_return(C, SLJIT_MOV, SLJIT_S1, 0); // return RET 49 50 /* Generate machine code */ 51 code = sljit_generate_code(C); 52 len = sljit_get_generated_code_size(C); 53 54 /* Execute code */ 55 func = (func_arr_t)code; 56 printf("func return %ld\n", func(arr, narr)); 57 58 /* dump_code(code, len); */ 59 60 /* Clean up */ 61 sljit_free_compiler(C); 62 sljit_free_code(code); 63 return 0; 64 } 65 66 int main() 67 { 68 long arr[8] = { 3, -10, 4, 6, 8, 12, 2000 }; 69 return array_access(arr, 8); 70 } 71