make __socketcall analogous to __syscall, error-returning

[musl] / src / math / aarch64 / fma.c

#include <math.h>

double fma(double x, double y, double z)
{
        __asm__ ("fmadd %d0, %d1, %d2, %d3" : "=w"(x) : "w"(x), "w"(y), "w"(z));
        return x;
}