xref: /openbmc/u-boot/arch/sh/lib/lshrsi3.S (revision 83d290c56fab2d38cd1ab4c4cc7099559c1d5046)

/* SPDX-License-Identifier: GPL-2.0+ */
/* Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
   2004, 2005, 2006
   Free Software Foundation, Inc.
 */

!! libgcc routines for the Renesas / SuperH SH CPUs.
!! Contributed by Steve Chamberlain.
!! sac@cygnus.com

!! ashiftrt_r4_x, ___ashrsi3, ___ashlsi3, ___lshrsi3 routines
!! recoded in assembly by Toshiyasu Morita
!! tm@netcom.com

/* SH2 optimizations for ___ashrsi3, ___ashlsi3, ___lshrsi3 and
   ELF local label prefixes by J"orn Rennecke
   amylaar@cygnus.com  */

!
! __lshrsi3)
!
! Entry:
!
! r4: Value to shift
! r5: Shifts
!
! Exit:
!
! r0: Result
!
! Destroys:
!
! (none)
!
	.global	__lshrsi3
	.align	2
__lshrsi3:
	mov	#31,r0
	and	r0,r5
	mova	__lshrsi3_table,r0
	mov.b	@(r0,r5),r5
#ifdef __sh1__
	add	r5,r0
	jmp	@r0
#else
	braf	r5
#endif
	mov	r4,r0

	.align	2
__lshrsi3_table:
	.byte		__lshrsi3_0-__lshrsi3_table
	.byte		__lshrsi3_1-__lshrsi3_table
	.byte		__lshrsi3_2-__lshrsi3_table
	.byte		__lshrsi3_3-__lshrsi3_table
	.byte		__lshrsi3_4-__lshrsi3_table
	.byte		__lshrsi3_5-__lshrsi3_table
	.byte		__lshrsi3_6-__lshrsi3_table
	.byte		__lshrsi3_7-__lshrsi3_table
	.byte		__lshrsi3_8-__lshrsi3_table
	.byte		__lshrsi3_9-__lshrsi3_table
	.byte		__lshrsi3_10-__lshrsi3_table
	.byte		__lshrsi3_11-__lshrsi3_table
	.byte		__lshrsi3_12-__lshrsi3_table
	.byte		__lshrsi3_13-__lshrsi3_table
	.byte		__lshrsi3_14-__lshrsi3_table
	.byte		__lshrsi3_15-__lshrsi3_table
	.byte		__lshrsi3_16-__lshrsi3_table
	.byte		__lshrsi3_17-__lshrsi3_table
	.byte		__lshrsi3_18-__lshrsi3_table
	.byte		__lshrsi3_19-__lshrsi3_table
	.byte		__lshrsi3_20-__lshrsi3_table
	.byte		__lshrsi3_21-__lshrsi3_table
	.byte		__lshrsi3_22-__lshrsi3_table
	.byte		__lshrsi3_23-__lshrsi3_table
	.byte		__lshrsi3_24-__lshrsi3_table
	.byte		__lshrsi3_25-__lshrsi3_table
	.byte		__lshrsi3_26-__lshrsi3_table
	.byte		__lshrsi3_27-__lshrsi3_table
	.byte		__lshrsi3_28-__lshrsi3_table
	.byte		__lshrsi3_29-__lshrsi3_table
	.byte		__lshrsi3_30-__lshrsi3_table
	.byte		__lshrsi3_31-__lshrsi3_table

__lshrsi3_6:
	shlr2	r0
__lshrsi3_4:
	shlr2	r0
__lshrsi3_2:
	rts
	shlr2	r0

__lshrsi3_7:
	shlr2	r0
__lshrsi3_5:
	shlr2	r0
__lshrsi3_3:
	shlr2	r0
__lshrsi3_1:
	rts
	shlr	r0

__lshrsi3_14:
	shlr2	r0
__lshrsi3_12:
	shlr2	r0
__lshrsi3_10:
	shlr2	r0
__lshrsi3_8:
	rts
	shlr8	r0

__lshrsi3_15:
	shlr2	r0
__lshrsi3_13:
	shlr2	r0
__lshrsi3_11:
	shlr2	r0
__lshrsi3_9:
	shlr8	r0
	rts
	shlr	r0

__lshrsi3_22:
	shlr2	r0
__lshrsi3_20:
	shlr2	r0
__lshrsi3_18:
	shlr2	r0
__lshrsi3_16:
	rts
	shlr16	r0

__lshrsi3_23:
	shlr2	r0
__lshrsi3_21:
	shlr2	r0
__lshrsi3_19:
	shlr2	r0
__lshrsi3_17:
	shlr16	r0
	rts
	shlr	r0

__lshrsi3_30:
	shlr2	r0
__lshrsi3_28:
	shlr2	r0
__lshrsi3_26:
	shlr2	r0
__lshrsi3_24:
	shlr16	r0
	rts
	shlr8	r0

__lshrsi3_31:
	shlr2	r0
__lshrsi3_29:
	shlr2	r0
__lshrsi3_27:
	shlr2	r0
__lshrsi3_25:
	shlr16	r0
	shlr8	r0
	rts
	shlr	r0

__lshrsi3_0:
	rts
	nop