1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
|
// Copyright 2014 The Emscripten Authors. All rights reserved.
// Emscripten is available under two separate licenses, the MIT license and the
// University of Illinois/NCSA Open Source License. Both these licenses can be
// found in the LICENSE file.
#include <stdio.h>
#define ALIGN(num_bytes) __attribute__((aligned(num_bytes)))
struct Aligned {
char ALIGN(4) a4;
char ALIGN(8) a8;
char ALIGN(16) a16;
char ALIGN(32) a32;
};
__attribute__((noinline))
void Test(const void* p, int size) {
printf("align %d: %zu\n", size, reinterpret_cast<size_t>(p) % size);
}
int main() {
Aligned a;
Test(&a.a4, 4);
Test(&a.a8, 8);
Test(&a.a16, 16);
Test(&a.a32, 32);
int p = reinterpret_cast<size_t>(&a);
printf("base align: %d, %d, %d, %d\n", p%4, p%8, p%16, p%32);
return 0;
}
|
