Symbol: bsrq
usr/src/boot/sys/amd64/include/cpufunc.h
185
return (mask == 0 ? mask : (int)bsrq((u_long)mask) + 1);
usr/src/compat/bhyve/amd64/machine/cpufunc.h
97
return (mask == 0 ? mask : (int)bsrq((u_long)mask) + 1);