mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-21 10:55:51 +02:00
121 lines
4.3 KiB
ArmAsm
121 lines
4.3 KiB
ArmAsm
@
|
|
@ ARMv4-optimized IDCT functions
|
|
@ Copyright (c) 2004 AGAWA Koji <i (AT) atty (DOT) jp>
|
|
@
|
|
@ 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 "config.h"
|
|
#include "libavutil/arm/asm.S"
|
|
|
|
@ void ff_add_pixels_clamped_arm(int16_t *block, uint8_t *dest, ptrdiff_t stride)
|
|
function ff_add_pixels_clamped_arm, export=1, align=5
|
|
push {r4-r10}
|
|
mov r10, #8
|
|
1:
|
|
ldr r4, [r1] /* load dest */
|
|
/* block[0] and block[1]*/
|
|
ldrsh r5, [r0]
|
|
ldrsh r7, [r0, #2]
|
|
and r6, r4, #0xFF
|
|
and r8, r4, #0xFF00
|
|
add r6, r6, r5
|
|
add r8, r7, r8, lsr #8
|
|
mvn r5, r5
|
|
mvn r7, r7
|
|
tst r6, #0x100
|
|
it ne
|
|
movne r6, r5, lsr #24
|
|
tst r8, #0x100
|
|
it ne
|
|
movne r8, r7, lsr #24
|
|
mov r9, r6
|
|
ldrsh r5, [r0, #4] /* moved form [A] */
|
|
orr r9, r9, r8, lsl #8
|
|
/* block[2] and block[3] */
|
|
/* [A] */
|
|
ldrsh r7, [r0, #6]
|
|
and r6, r4, #0xFF0000
|
|
and r8, r4, #0xFF000000
|
|
add r6, r5, r6, lsr #16
|
|
add r8, r7, r8, lsr #24
|
|
mvn r5, r5
|
|
mvn r7, r7
|
|
tst r6, #0x100
|
|
it ne
|
|
movne r6, r5, lsr #24
|
|
tst r8, #0x100
|
|
it ne
|
|
movne r8, r7, lsr #24
|
|
orr r9, r9, r6, lsl #16
|
|
ldr r4, [r1, #4] /* moved form [B] */
|
|
orr r9, r9, r8, lsl #24
|
|
/* store dest */
|
|
ldrsh r5, [r0, #8] /* moved form [C] */
|
|
str r9, [r1]
|
|
|
|
/* load dest */
|
|
/* [B] */
|
|
/* block[4] and block[5] */
|
|
/* [C] */
|
|
ldrsh r7, [r0, #10]
|
|
and r6, r4, #0xFF
|
|
and r8, r4, #0xFF00
|
|
add r6, r6, r5
|
|
add r8, r7, r8, lsr #8
|
|
mvn r5, r5
|
|
mvn r7, r7
|
|
tst r6, #0x100
|
|
it ne
|
|
movne r6, r5, lsr #24
|
|
tst r8, #0x100
|
|
it ne
|
|
movne r8, r7, lsr #24
|
|
mov r9, r6
|
|
ldrsh r5, [r0, #12] /* moved from [D] */
|
|
orr r9, r9, r8, lsl #8
|
|
/* block[6] and block[7] */
|
|
/* [D] */
|
|
ldrsh r7, [r0, #14]
|
|
and r6, r4, #0xFF0000
|
|
and r8, r4, #0xFF000000
|
|
add r6, r5, r6, lsr #16
|
|
add r8, r7, r8, lsr #24
|
|
mvn r5, r5
|
|
mvn r7, r7
|
|
tst r6, #0x100
|
|
it ne
|
|
movne r6, r5, lsr #24
|
|
tst r8, #0x100
|
|
it ne
|
|
movne r8, r7, lsr #24
|
|
orr r9, r9, r6, lsl #16
|
|
add r0, r0, #16 /* moved from [E] */
|
|
orr r9, r9, r8, lsl #24
|
|
subs r10, r10, #1 /* moved from [F] */
|
|
/* store dest */
|
|
str r9, [r1, #4]
|
|
|
|
/* [E] */
|
|
/* [F] */
|
|
add r1, r1, r2
|
|
bne 1b
|
|
|
|
pop {r4-r10}
|
|
bx lr
|
|
endfunc
|