/*
   *  linux/arch/arm/lib/io-writesw-armv3.S
   *
   *  Copyright (C) 1995-2000 Russell King
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 as
   * published by the Free Software Foundation.
   */
  #include <linux/linkage.h>
  #include <asm/assembler.h>

  .Loutsw_bad_alignment:
  		adr	r0, .Loutsw_bad_align_msg

  		mov	r2, lr
  		b	panic

  .Loutsw_bad_align_msg:

  		.asciz	"outsw: bad buffer alignment (0x%p, lr=0x%08lX)
  "
  		.align

  .Loutsw_align:	tst	r1, #1
  		bne	.Loutsw_bad_alignment

  
  		add	r1, r1, #2
  
  		ldr	r3, [r1, #-4]
  		mov	r3, r3, lsr #16
  		orr	r3, r3, r3, lsl #16
  		str	r3, [r0]
  		subs	r2, r2, #1

  		moveq	pc, lr

  
  ENTRY(__raw_writesw)
  		teq	r2, #0		@ do we have to check for the zero len?
  		moveq	pc, lr
  		tst	r1, #3

  		bne	.Loutsw_align

  		stmfd	sp!, {r4, r5, r6, lr}

  
  		subs	r2, r2, #8

  		bmi	.Lno_outsw_8

  .Loutsw_8_lp:	ldmia	r1!, {r3, r4, r5, r6}

  
  		mov	ip, r3, lsl #16
  		orr	ip, ip, ip, lsr #16
  		str	ip, [r0]
  
  		mov	ip, r3, lsr #16
  		orr	ip, ip, ip, lsl #16
  		str	ip, [r0]
  
  		mov	ip, r4, lsl #16
  		orr	ip, ip, ip, lsr #16
  		str	ip, [r0]
  
  		mov	ip, r4, lsr #16
  		orr	ip, ip, ip, lsl #16
  		str	ip, [r0]
  
  		mov	ip, r5, lsl #16
  		orr	ip, ip, ip, lsr #16
  		str	ip, [r0]
  
  		mov	ip, r5, lsr #16
  		orr	ip, ip, ip, lsl #16
  		str	ip, [r0]
  
  		mov	ip, r6, lsl #16
  		orr	ip, ip, ip, lsr #16
  		str	ip, [r0]
  
  		mov	ip, r6, lsr #16
  		orr	ip, ip, ip, lsl #16
  		str	ip, [r0]
  
  		subs	r2, r2, #8

  		bpl	.Loutsw_8_lp

  
  		tst	r2, #7

  		ldmeqfd	sp!, {r4, r5, r6, pc}

  .Lno_outsw_8:	tst	r2, #4
  		beq	.Lno_outsw_4

  
  		ldmia	r1!, {r3, r4}
  
  		mov	ip, r3, lsl #16
  		orr	ip, ip, ip, lsr #16
  		str	ip, [r0]
  
  		mov	ip, r3, lsr #16
  		orr	ip, ip, ip, lsl #16
  		str	ip, [r0]
  
  		mov	ip, r4, lsl #16
  		orr	ip, ip, ip, lsr #16
  		str	ip, [r0]
  
  		mov	ip, r4, lsr #16
  		orr	ip, ip, ip, lsl #16
  		str	ip, [r0]

  .Lno_outsw_4:	tst	r2, #2
  		beq	.Lno_outsw_2

  
  		ldr	r3, [r1], #4
  
  		mov	ip, r3, lsl #16
  		orr	ip, ip, ip, lsr #16
  		str	ip, [r0]
  
  		mov	ip, r3, lsr #16
  		orr	ip, ip, ip, lsl #16
  		str	ip, [r0]

  .Lno_outsw_2:	tst	r2, #1

  
  		ldrne	r3, [r1]
  
  		movne	ip, r3, lsl #16
  		orrne	ip, ip, ip, lsr #16
  		strne	ip, [r0]

  		ldmfd	sp!, {r4, r5, r6, pc}