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__asm__ __volatile__ ( "movq %%rsi, %%rdi \t\n" "movb $0, %%al\t\n" "movl $0, %%ecx \t\n" "not %%ecx \t\n" "repnz scasb \t\n" "subq %%rsi, %%rdi \t\n" "subq $1, %%rdi \t\n" "movq %%rdi, %%rdx \t\n" "movq $1, %%rax \t\n" "movq $1, %%rdi \t\n" "syscall" ::"S"("hello, world") :"rax", "rdx", "rdi", "ecx" );
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