21 lines
346 B
ArmAsm
21 lines
346 B
ArmAsm
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/* $NetBSD: swab.S,v 1.7 1999/10/25 23:48:16 thorpej Exp $ */
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#include <machine/asm.h>
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ENTRY(swab)
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movl %sp@(4),%a0 | source
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movl %sp@(8),%a1 | destination
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movl %sp@(12),%d0 | count
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lsrl #1,%d0 | count is in bytes; we need words
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jeq swdone
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swloop:
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movw %a0@+,%d1
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rorw #8,%d1
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movw %d1,%a1@+
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subql #1,%d0
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jne swloop
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swdone:
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rts
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