(svn r3378) - NewGRF Fix: Use order status to determine whether a vehicle is loading instead
of speed, and get that state from first vehicle in a train consist.
.CODE
PUBLIC _get_save_esp
_get_save_esp:
MOV RAX,RSP
RET
PUBLIC _rdtsc
_rdtsc:
RDTSC
MOV RCX,RDX
SHL RCX,32
AND RAX,0FFFFFFFFh
OR RAX,RCX
RET
END