github.com/afumu/libc@v0.0.6/musl/src/math/aarch64/lround.c (about)

     1  #include <math.h>
     2  
     3  long lround(double x)
     4  {
     5  	long n;
     6  	__asm__ ("fcvtas %x0, %d1" : "=r"(n) : "w"(x));
     7  	return n;
     8  }