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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/frv/lib/insl_sw.S
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/* insl_sw.S: input array of 4b words from device port with byte swapping

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 *

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 * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.

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 * Written by David Howells ([email protected])

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 *

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 * This program is free software; you can redistribute it and/or

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 * modify it under the terms of the GNU General Public License

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 * as published by the Free Software Foundation; either version

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 * 2 of the License, or (at your option) any later version.

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 */

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        .text

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        .p2align	4

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###############################################################################

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#

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# void __insl_sw(unsigned int port, void *buf, int n)

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#

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###############################################################################

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        .globl		__insl_sw

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        .type		__insl_sw,@function

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__insl_sw:

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	subi.p		gr9,#1,gr9

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	setlos		#1,gr4

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0:

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	ldi.p		@(gr8,#0),gr5		; get 0xAABBCCDD

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	subicc		gr10,#1,gr10,icc0

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	stbu.p		gr5,@(gr9,gr4)		; write 0xDD

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	srli		gr5,#8,gr5

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	stbu.p		gr5,@(gr9,gr4)		; write 0xCC

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	srli		gr5,#8,gr5

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	stbu.p		gr5,@(gr9,gr4)		; write 0xBB

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	srli		gr5,#8,gr5

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	stbu.p		gr5,@(gr9,gr4)		; write 0xAA

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	bhi		icc0,#2,0b

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	bralr

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	.size		__insl_sw, .-__insl_sw

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