minix/lib/i86/misc/hton86.s
2009-11-09 10:26:00 +00:00

25 lines
561 B
ArmAsm

! htonX(), ntohX() - Host to network byte order conversion
! Author: Kees J. Bot
! 7 Jan 1997
!
! This is a little endian 8086, so we swap bytes to/from the big endian network
! order. The normal <net/hton.h> macros are not used, they give lousy code.
.text
.define _htons, _ntohs
_htons:
_ntohs:
mov bx, sp
movb ah, 2(bx) ! Load bytes into ax in reverse order
movb al, 3(bx)
ret
.define _htonl, _ntohl
_htonl:
_ntohl:
mov bx, sp
movb dh, 2(bx) ! Load bytes into dx:ax in reverse order
movb dl, 3(bx)
movb ah, 4(bx)
movb al, 5(bx)
ret