minix/lib/libc/arch/m68k/string/swab.S
Lionel Sambuc 84d9c625bf Synchronize on NetBSD-CVS (2013/12/1 12:00:00 UTC)
- Fix for possible unset uid/gid in toproto
 - Fix for default mtree style
 - Update libelf
 - Importing libexecinfo
 - Resynchronize GCC, mpc, gmp, mpfr
 - build.sh: Replace params with show-params.
     This has been done as the make target has been renamed in the same
     way, while a new target named params has been added. This new
     target generates a file containing all the parameters, instead of
     printing it on the console.
 - Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org)
     get getservbyport() out of the inner loop

Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
2014-07-28 17:05:06 +02:00

27 lines
440 B
ArmAsm

/* $NetBSD: swab.S,v 1.10 2013/07/18 21:37:47 matt Exp $ */
#include <machine/asm.h>
ENTRY(swab)
movl 4(%sp),%a0 | source
movl 8(%sp),%a1 | destination
movl 12(%sp),%d0 | count
lsrl #1,%d0 | count is in bytes; we need words
jeq swdone
swloop:
#ifdef __mcoldfire__
movb (%a0)+,1(%a1)
movb (%a0)+,(%a1)
addql #2,%a1
#else
movw (%a0)+,%d1
rorw #8,%d1
movw %d1,(%a1)+
#endif
subql #1,%d0
jne swloop
swdone:
rts
END(swab)