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

     1  #include <math.h>
     2  
     3  double fma(double x, double y, double z)
     4  {
     5  	__asm__ ("fmadd %d0, %d1, %d2, %d3" : "=w"(x) : "w"(x), "w"(y), "w"(z));
     6  	return x;
     7  }