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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/mn10300/lib/__ashldi3.S
10817 views
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/* MN10300 64-bit arithmetic left shift

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 *

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 * Copyright (C) 2007 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 Licence

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 * as published by the Free Software Foundation; either version

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

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 */

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#include <asm/cache.h>

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        .text

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        .balign	L1_CACHE_BYTES

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

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#

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# unsigned long long __ashldi3(unsigned long long value [D1:D0],

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#			       unsigned by [(12,SP)])

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#

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

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        .globl	__ashldi3

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        .type	__ashldi3,@function

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__ashldi3:

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	mov	(12,sp),a0

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	and	+63,a0

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	beq	__ashldi3_zero

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	cmp	+31,a0

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	bhi	__ashldi3_32plus

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	# the count is in the range 1-31

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	asl	a0,d1

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	mov	+32,a1

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	sub	a0,a1,a1			# a1 = 32 - count

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	lsr	a1,d0,a1			# get overflow from LSW -> MSW

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	or_asl	a1,d1,a0,d0			# insert overflow into MSW and

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						# shift the LSW

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	rets

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	.balign	L1_CACHE_BYTES

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	# the count is in the range 32-63

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__ashldi3_32plus:

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	asl	a0,d0,d1

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	clr	d0

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__ashldi3_zero:

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	rets

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	.size	__ashldi3, .-__ashldi3

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