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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/sh/lib/lshrsi3.S
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/* SPDX-License-Identifier: GPL-2.0+ WITH GCC-exception-2.0

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   Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003,

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   2004, 2005, 2006

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   Free Software Foundation, Inc.

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*/

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!! libgcc routines for the Renesas / SuperH SH CPUs.

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!! Contributed by Steve Chamberlain.

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!! sac@cygnus.com

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!! ashiftrt_r4_x, ___ashrsi3, ___ashlsi3, ___lshrsi3 routines

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!! recoded in assembly by Toshiyasu Morita

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!! tm@netcom.com

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/* SH2 optimizations for ___ashrsi3, ___ashlsi3, ___lshrsi3 and

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   ELF local label prefixes by J"orn Rennecke

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   [email protected]  */

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!

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! __lshrsi3

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!

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! Entry:

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!

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! r4: Value to shift

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! r5: Shifts

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!

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! Exit:

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!

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! r0: Result

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!

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! Destroys:

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!

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! (none)

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!

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! __lshrsi3_r0

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!

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! Entry:

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!

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! r0: Value to shift

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! r5: Shifts

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!

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! Exit:

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!

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! r0: Result

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!

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! Destroys:

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!

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! (none)

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!

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	.global	__lshrsi3

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	.global	__lshrsi3_r0

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	.align	2

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__lshrsi3:

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	mov	r5,r0

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	.align	2

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__lshrsi3_r0:

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	and	#31,r0

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	mov.l	r4,@-r15

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	mov	r0,r4

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	mova	lshrsi3_table,r0

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	mov.b	@(r0,r4),r4

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	add	r4,r0

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	jmp	@r0

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	mov.l	@r15+,r0

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	.align	2

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lshrsi3_table:

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	.byte		lshrsi3_0-lshrsi3_table

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	.byte		lshrsi3_1-lshrsi3_table

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	.byte		lshrsi3_2-lshrsi3_table

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	.byte		lshrsi3_3-lshrsi3_table

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	.byte		lshrsi3_4-lshrsi3_table

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	.byte		lshrsi3_5-lshrsi3_table

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	.byte		lshrsi3_6-lshrsi3_table

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	.byte		lshrsi3_7-lshrsi3_table

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	.byte		lshrsi3_8-lshrsi3_table

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	.byte		lshrsi3_9-lshrsi3_table

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	.byte		lshrsi3_10-lshrsi3_table

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	.byte		lshrsi3_11-lshrsi3_table

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	.byte		lshrsi3_12-lshrsi3_table

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	.byte		lshrsi3_13-lshrsi3_table

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	.byte		lshrsi3_14-lshrsi3_table

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	.byte		lshrsi3_15-lshrsi3_table

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	.byte		lshrsi3_16-lshrsi3_table

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	.byte		lshrsi3_17-lshrsi3_table

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	.byte		lshrsi3_18-lshrsi3_table

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	.byte		lshrsi3_19-lshrsi3_table

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	.byte		lshrsi3_20-lshrsi3_table

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	.byte		lshrsi3_21-lshrsi3_table

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	.byte		lshrsi3_22-lshrsi3_table

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	.byte		lshrsi3_23-lshrsi3_table

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	.byte		lshrsi3_24-lshrsi3_table

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	.byte		lshrsi3_25-lshrsi3_table

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	.byte		lshrsi3_26-lshrsi3_table

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	.byte		lshrsi3_27-lshrsi3_table

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	.byte		lshrsi3_28-lshrsi3_table

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	.byte		lshrsi3_29-lshrsi3_table

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	.byte		lshrsi3_30-lshrsi3_table

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	.byte		lshrsi3_31-lshrsi3_table

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lshrsi3_6:

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	shlr2	r0

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lshrsi3_4:

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	shlr2	r0

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lshrsi3_2:

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	rts

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	shlr2	r0

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lshrsi3_7:

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	shlr2	r0

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lshrsi3_5:

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	shlr2	r0

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lshrsi3_3:

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	shlr2	r0

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lshrsi3_1:

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	rts

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	shlr	r0

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lshrsi3_14:

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	shlr2	r0

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lshrsi3_12:

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	shlr2	r0

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lshrsi3_10:

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	shlr2	r0

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lshrsi3_8:

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	rts

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	shlr8	r0

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lshrsi3_15:

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	shlr2	r0

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lshrsi3_13:

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	shlr2	r0

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lshrsi3_11:

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	shlr2	r0

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lshrsi3_9:

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	shlr8	r0

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	rts

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	shlr	r0

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lshrsi3_22:

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	shlr2	r0

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lshrsi3_20:

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	shlr2	r0

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lshrsi3_18:

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	shlr2	r0

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lshrsi3_16:

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	rts

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	shlr16	r0

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lshrsi3_23:

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	shlr2	r0

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lshrsi3_21:

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	shlr2	r0

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lshrsi3_19:

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	shlr2	r0

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lshrsi3_17:

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	shlr16	r0

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	rts

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	shlr	r0

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lshrsi3_30:

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	shlr2	r0

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lshrsi3_28:

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	shlr2	r0

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lshrsi3_26:

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	shlr2	r0

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lshrsi3_24:

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	shlr16	r0

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	rts

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	shlr8	r0

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lshrsi3_31:

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	shlr2	r0

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lshrsi3_29:

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	shlr2	r0

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lshrsi3_27:

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	shlr2	r0

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lshrsi3_25:

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	shlr16	r0

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	shlr8	r0

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	rts

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	shlr	r0

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lshrsi3_0:

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	rts

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	nop

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