1 #include <stdio.h>
2 #include <stdint.h>
3 alignas(16) uint8_t buf[32];
4 // This uses inline assembly to generate an instruction that writes to a large
5 // block of memory. If it fails on your compiler/architecture, please add
6 // appropriate code to generate a large write to "buf". If you cannot write at
7 // least 2*sizeof(void*) bytes with a single instruction, you will have to skip
8 // this test.
9 
10 int main() {
11 #if defined(__i386__) || defined(__x86_64__)
12   asm volatile ("movdqa %%xmm0, %0" : : "m"(buf));
13 #elif defined(__arm__)
14   asm volatile ("stm %0, { r0, r1, r2, r3 }" : : "r"(buf));
15 #elif defined(__aarch64__)
16   asm volatile ("stp x0, x1, %0" : : "m"(buf));
17 #elif defined(__mips__)
18   asm volatile ("lw $2, %0" : : "m"(buf));
19 #endif
20   return 0;
21 }
22