minix/common/lib/libc/arch/vax/gen/bswap64.S

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ArmAsm
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/* Written by Anders Magnusson. Public Domain */
#include <machine/asm.h>
RCSID("$NetBSD: bswap64.S,v 1.3 2011/01/25 04:45:28 matt Exp $")
ENTRY(bswap64, 0)
movq 4(%ap),%r3
rotl $-8,%r3,%r1
insv %r1,$16,$8,%r1
rotl $8,%r3,%r2
movb %r2,%r1
rotl $-8,%r4,%r0
insv %r0,$16,$8,%r0
rotl $8,%r4,%r2
movb %r2,%r0
ret
END(bswap64)