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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/sh/lib/ashrsi3.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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! __ashrsi3

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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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! __ashrsi3_r0

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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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! r0: 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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	.global	__ashrsi3

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	.global	__ashrsi3_r0

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	.align	2

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__ashrsi3:

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	mov	r5,r0

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	.align	2

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__ashrsi3_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	ashrsi3_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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ashrsi3_table:

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	.byte		ashrsi3_0-ashrsi3_table

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	.byte		ashrsi3_1-ashrsi3_table

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	.byte		ashrsi3_2-ashrsi3_table

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	.byte		ashrsi3_3-ashrsi3_table

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	.byte		ashrsi3_4-ashrsi3_table

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	.byte		ashrsi3_5-ashrsi3_table

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	.byte		ashrsi3_6-ashrsi3_table

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	.byte		ashrsi3_7-ashrsi3_table

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	.byte		ashrsi3_8-ashrsi3_table

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	.byte		ashrsi3_9-ashrsi3_table

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	.byte		ashrsi3_10-ashrsi3_table

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	.byte		ashrsi3_11-ashrsi3_table

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	.byte		ashrsi3_12-ashrsi3_table

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	.byte		ashrsi3_13-ashrsi3_table

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	.byte		ashrsi3_14-ashrsi3_table

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	.byte		ashrsi3_15-ashrsi3_table

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	.byte		ashrsi3_16-ashrsi3_table

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	.byte		ashrsi3_17-ashrsi3_table

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	.byte		ashrsi3_18-ashrsi3_table

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	.byte		ashrsi3_19-ashrsi3_table

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	.byte		ashrsi3_20-ashrsi3_table

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	.byte		ashrsi3_21-ashrsi3_table

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	.byte		ashrsi3_22-ashrsi3_table

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	.byte		ashrsi3_23-ashrsi3_table

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	.byte		ashrsi3_24-ashrsi3_table

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	.byte		ashrsi3_25-ashrsi3_table

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	.byte		ashrsi3_26-ashrsi3_table

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	.byte		ashrsi3_27-ashrsi3_table

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	.byte		ashrsi3_28-ashrsi3_table

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	.byte		ashrsi3_29-ashrsi3_table

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	.byte		ashrsi3_30-ashrsi3_table

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	.byte		ashrsi3_31-ashrsi3_table

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ashrsi3_31:

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	rotcl	r0

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	rts

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	subc	r0,r0

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ashrsi3_30:

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	shar	r0

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ashrsi3_29:

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	shar	r0

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ashrsi3_28:

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	shar	r0

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ashrsi3_27:

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	shar	r0

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ashrsi3_26:

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	shar	r0

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ashrsi3_25:

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	shar	r0

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ashrsi3_24:

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	shlr16	r0

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	shlr8	r0

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	rts

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	exts.b	r0,r0

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ashrsi3_23:

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	shar	r0

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ashrsi3_22:

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	shar	r0

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ashrsi3_21:

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	shar	r0

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ashrsi3_20:

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	shar	r0

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ashrsi3_19:

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	shar	r0

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ashrsi3_18:

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	shar	r0

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ashrsi3_17:

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	shar	r0

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ashrsi3_16:

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	shlr16	r0

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	rts

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	exts.w	r0,r0

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ashrsi3_15:

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	shar	r0

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ashrsi3_14:

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	shar	r0

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ashrsi3_13:

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	shar	r0

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ashrsi3_12:

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	shar	r0

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ashrsi3_11:

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	shar	r0

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ashrsi3_10:

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	shar	r0

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ashrsi3_9:

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	shar	r0

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ashrsi3_8:

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	shar	r0

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ashrsi3_7:

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	shar	r0

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ashrsi3_6:

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	shar	r0

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ashrsi3_5:

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	shar	r0

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ashrsi3_4:

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	shar	r0

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ashrsi3_3:

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	shar	r0

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ashrsi3_2:

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	shar	r0

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ashrsi3_1:

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	rts

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	shar	r0

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ashrsi3_0:

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	rts

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	nop

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