View Compilation Error

0_0_18562484_19386.cpp: In function 'int main()':
0_0_18562484_19386.cpp:20:28: error: expected ')' before '::' token
     asm("movq %0, %%rsp\n" :: "r"(p));
                            ^
0_0_18562484_19386.cpp:20:37: error: 'asm' was not declared in this scope
     asm("movq %0, %%rsp\n" :: "r"(p));
                                     ^