[deb_ffmpeg.git] / ffmpeg / libavcodec / arm / mpegvideoencdsp_armv6.S

/*
 * Copyright (c) 2009 Mans Rullgard <mans@mansr.com>
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include "libavutil/arm/asm.S"

function ff_pix_norm1_armv6, export=1
        push            {r4-r6, lr}
        mov             r12, #16
        mov             lr,  #0
1:
        ldm             r0,  {r2-r5}
        uxtb16          r6,  r2
        uxtb16          r2,  r2,  ror #8
        smlad           lr,  r6,  r6,  lr
        uxtb16          r6,  r3
        smlad           lr,  r2,  r2,  lr
        uxtb16          r3,  r3,  ror #8
        smlad           lr,  r6,  r6,  lr
        uxtb16          r6,  r4
        smlad           lr,  r3,  r3,  lr
        uxtb16          r4,  r4,  ror #8
        smlad           lr,  r6,  r6,  lr
        uxtb16          r6,  r5
        smlad           lr,  r4,  r4,  lr
        uxtb16          r5,  r5,  ror #8
        smlad           lr,  r6,  r6,  lr
        subs            r12, r12, #1
        add             r0,  r0,  r1
        smlad           lr,  r5,  r5,  lr
        bgt             1b

        mov             r0,  lr
        pop             {r4-r6, pc}
endfunc

function ff_pix_sum_armv6, export=1
        push            {r4-r7, lr}
        mov             r12, #16
        mov             r2,  #0
        mov             r3,  #0
        mov             lr,  #0
        ldr             r4,  [r0]
1:
        subs            r12, r12, #1
        ldr             r5,  [r0, #4]
        usada8          r2,  r4,  lr,  r2
        ldr             r6,  [r0, #8]
        usada8          r3,  r5,  lr,  r3
        ldr             r7,  [r0, #12]
        usada8          r2,  r6,  lr,  r2
        beq             2f
        ldr_pre         r4,  r0,  r1
        usada8          r3,  r7,  lr,  r3
        bgt             1b
2:
        usada8          r3,  r7,  lr,  r3
        add             r0,  r2,  r3
        pop             {r4-r7, pc}
endfunc
Commit	Line	Data
2ba45a60 DM	1	/*
	2	* Copyright (c) 2009 Mans Rullgard <mans@mansr.com>
	3	*
	4	* This file is part of FFmpeg.
	5	*
	6	* FFmpeg is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU Lesser General Public
	8	* License as published by the Free Software Foundation; either
	9	* version 2.1 of the License, or (at your option) any later version.
	10	*
	11	* FFmpeg is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	* Lesser General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU Lesser General Public
	17	* License along with FFmpeg; if not, write to the Free Software
	18	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	19	*/
	20
	21	#include "libavutil/arm/asm.S"
	22
	23	function ff_pix_norm1_armv6, export=1
	24	push {r4-r6, lr}
	25	mov r12, #16
	26	mov lr, #0
	27	1:
	28	ldm r0, {r2-r5}
	29	uxtb16 r6, r2
	30	uxtb16 r2, r2, ror #8
	31	smlad lr, r6, r6, lr
	32	uxtb16 r6, r3
	33	smlad lr, r2, r2, lr
	34	uxtb16 r3, r3, ror #8
	35	smlad lr, r6, r6, lr
	36	uxtb16 r6, r4
	37	smlad lr, r3, r3, lr
	38	uxtb16 r4, r4, ror #8
	39	smlad lr, r6, r6, lr
	40	uxtb16 r6, r5
	41	smlad lr, r4, r4, lr
	42	uxtb16 r5, r5, ror #8
	43	smlad lr, r6, r6, lr
	44	subs r12, r12, #1
	45	add r0, r0, r1
	46	smlad lr, r5, r5, lr
	47	bgt 1b
	48
	49	mov r0, lr
	50	pop {r4-r6, pc}
	51	endfunc
	52
	53	function ff_pix_sum_armv6, export=1
	54	push {r4-r7, lr}
	55	mov r12, #16
	56	mov r2, #0
	57	mov r3, #0
	58	mov lr, #0
	59	ldr r4, [r0]
	60	1:
	61	subs r12, r12, #1
	62	ldr r5, [r0, #4]
	63	usada8 r2, r4, lr, r2
	64	ldr r6, [r0, #8]
65	usada8 r3, r5, lr, r3
66	ldr r7, [r0, #12]
67	usada8 r2, r6, lr, r2
68	beq 2f
69	ldr_pre r4, r0, r1
70	usada8 r3, r7, lr, r3
71	bgt 1b
72	2:
73	usada8 r3, r7, lr, r3
74	add r0, r2, r3
75	pop {r4-r7, pc}
76	endfunc