/* Tutorial 1 - mul_add Builds and compiles the following function: int mul_add(int x, int y, int z) { return x * y + z; } */ #include #include int main(int argc, char **argv) { jit_context_t context; jit_type_t params[3]; jit_type_t signature; jit_function_t function; jit_value_t x, y, z; jit_value_t temp1, temp2; jit_int arg1, arg2, arg3; void *args[3]; jit_int result; /* Create a context to hold the JIT's primary state */ context = jit_context_create(); /* Lock the context while we build and compile the function */ jit_context_build_start(context); /* Build the function signature */ params[0] = jit_type_int; params[1] = jit_type_int; params[2] = jit_type_int; signature = jit_type_create_signature (jit_abi_cdecl, jit_type_int, params, 3, 1); /* Create the function object */ function = jit_function_create(context, signature); jit_type_free(signature); /* Construct the function body */ x = jit_value_get_param(function, 0); y = jit_value_get_param(function, 1); z = jit_value_get_param(function, 2); temp1 = jit_insn_mul(function, x, y); temp2 = jit_insn_add(function, temp1, z); jit_insn_return(function, temp2); /* Compile the function */ jit_function_compile(function); /* Unlock the context */ jit_context_build_end(context); /* Execute the function and print the result */ arg1 = 3; arg2 = 5; arg3 = 2; args[0] = &arg1; args[1] = &arg2; args[2] = &arg3; jit_function_apply(function, args, &result); printf("mul_add(3, 5, 2) = %d\n", (int)result); /* Clean up */ jit_context_destroy(context); /* Finished */ return 0; }