[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / avr32 / lib / io-readsb.S

/*
 * Copyright (C) 2004-2006 Atmel Corporation
 *
 * 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.
 */

	.text
.Lnot_word_aligned:
1:	ld.ub	r8, r12[0]
	sub	r10, 1
	st.b	r11++, r8
	reteq	r12
	tst	r11, r9
	brne	1b

	/* fall through */

	.global	__raw_readsb
	.type	__raw_readsb,@function
__raw_readsb:
	cp.w	r10, 0
	mov	r9, 3
	reteq	r12

	tst	r11, r9
	brne	.Lnot_word_aligned

	sub	r10, 4
	brlt	2f

1:	ldins.b	r8:t, r12[0]
	ldins.b	r8:u, r12[0]
	ldins.b	r8:l, r12[0]
	ldins.b r8:b, r12[0]
	st.w	r11++, r8
	sub	r10, 4
	brge	1b

2:	sub	r10, -4
	reteq	r12

3:	ld.ub	r8, r12[0]
	sub	r10, 1
	st.b	r11++, r8
	brne	3b

	retal	r12
Commit	Line	Data
d68041cc HS	1	/*
	2	* Copyright (C) 2004-2006 Atmel Corporation
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License version 2 as
	6	* published by the Free Software Foundation.
	7	*/
	8
	9	.text
	10	.Lnot_word_aligned:
	11	1: ld.ub r8, r12[0]
	12	sub r10, 1
	13	st.b r11++, r8
	14	reteq r12
	15	tst r11, r9
	16	brne 1b
	17
	18	/* fall through */
	19
	20	.global __raw_readsb
	21	.type __raw_readsb,@function
	22	__raw_readsb:
	23	cp.w r10, 0
	24	mov r9, 3
	25	reteq r12
	26
	27	tst r11, r9
	28	brne .Lnot_word_aligned
	29
	30	sub r10, 4
	31	brlt 2f
	32
	33	1: ldins.b r8:t, r12[0]
	34	ldins.b r8:u, r12[0]
	35	ldins.b r8:l, r12[0]
	36	ldins.b r8:b, r12[0]
	37	st.w r11++, r8
	38	sub r10, 4
	39	brge 1b
	40
	41	2: sub r10, -4
	42	reteq r12
	43
c1f24ac9	44	3: ld.ub r8, r12[0]
d68041cc HS	45	sub r10, 1
	46	st.b r11++, r8
	47	brne 3b
6af0f5f8 HS	48
6af0f5f8 HS	49	retal r12