| //===-- main.cpp ------------------------------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| #include <stdio.h> |
| #include <stdint.h> |
| alignas(16) uint8_t buf[32]; |
| // This uses inline assembly to generate an instruction that writes to a large |
| // block of memory. If it fails on your compiler/architecture, please add |
| // appropriate code to generate a large write to "buf". If you cannot write at |
| // least 2*sizeof(void*) bytes with a single instruction, you will have to skip |
| // this test. |
| |
| int main() { |
| #if defined(__i386__) || defined(__x86_64__) |
| asm volatile ("movdqa %%xmm0, %0" : : "m"(buf)); |
| #elif defined(__arm__) |
| asm volatile ("stm %0, { r0, r1, r2, r3 }" : : "r"(buf)); |
| #elif defined(__aarch64__) |
| asm volatile ("stp x0, x1, %0" : : "m"(buf)); |
| #elif defined(__mips__) |
| asm volatile ("lw $2, %0" : : "m"(buf)); |
| #endif |
| return 0; |
| } |