mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-24 08:12:44 +00:00
77e6293735
Use "bx lr", or "pop {lr}", which do proper mode switching
between thumb and arm modes. A plain "mov pc, lr" does not switch
from thumb mode to arm mode (while in arm mode, it does switch
mode for a thumb caller).
This is normally not an issue, as CONFIG_THUMB only is enabled if
the C compiler defaults to thumb; but stick to patterns that can
do mode switching if needed, for consistency.
Signed-off-by: Martin Storsjö <martin@martin.st>
78 lines
5.1 KiB
ArmAsm
78 lines
5.1 KiB
ArmAsm
/*
|
|
* Copyright (c) 2016 Matthieu Bouron <matthieu.bouron stupeflix.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_resample_common_apply_filter_x4_float_neon, export=1
|
|
vmov.f32 q0, #0.0 @ accumulator
|
|
1: vld1.32 {q1}, [r1]! @ src[0..3]
|
|
vld1.32 {q2}, [r2]! @ filter[0..3]
|
|
vmla.f32 q0, q1, q2 @ accumulator += src[0..3] * filter[0..3]
|
|
subs r3, #4 @ filter_length -= 4
|
|
bgt 1b @ loop until filter_length
|
|
vpadd.f32 d0, d0, d1 @ pair adding of the 4x32-bit accumulated values
|
|
vpadd.f32 d0, d0, d0 @ pair adding of the 4x32-bit accumulator values
|
|
vst1.32 {d0[0]}, [r0] @ write accumulator
|
|
bx lr
|
|
endfunc
|
|
|
|
function ff_resample_common_apply_filter_x8_float_neon, export=1
|
|
vmov.f32 q0, #0.0 @ accumulator
|
|
1: vld1.32 {q1}, [r1]! @ src[0..3]
|
|
vld1.32 {q2}, [r2]! @ filter[0..3]
|
|
vld1.32 {q8}, [r1]! @ src[4..7]
|
|
vld1.32 {q9}, [r2]! @ filter[4..7]
|
|
vmla.f32 q0, q1, q2 @ accumulator += src[0..3] * filter[0..3]
|
|
vmla.f32 q0, q8, q9 @ accumulator += src[4..7] * filter[4..7]
|
|
subs r3, #8 @ filter_length -= 8
|
|
bgt 1b @ loop until filter_length
|
|
vpadd.f32 d0, d0, d1 @ pair adding of the 4x32-bit accumulated values
|
|
vpadd.f32 d0, d0, d0 @ pair adding of the 4x32-bit accumulator values
|
|
vst1.32 {d0[0]}, [r0] @ write accumulator
|
|
bx lr
|
|
endfunc
|
|
|
|
function ff_resample_common_apply_filter_x4_s16_neon, export=1
|
|
vmov.s32 q0, #0 @ accumulator
|
|
1: vld1.16 {d2}, [r1]! @ src[0..3]
|
|
vld1.16 {d4}, [r2]! @ filter[0..3]
|
|
vmlal.s16 q0, d2, d4 @ accumulator += src[0..3] * filter[0..3]
|
|
subs r3, #4 @ filter_length -= 4
|
|
bgt 1b @ loop until filter_length
|
|
vpadd.s32 d0, d0, d1 @ pair adding of the 4x32-bit accumulated values
|
|
vpadd.s32 d0, d0, d0 @ pair adding of the 4x32-bit accumulator values
|
|
vst1.32 {d0[0]}, [r0] @ write accumulator
|
|
bx lr
|
|
endfunc
|
|
|
|
function ff_resample_common_apply_filter_x8_s16_neon, export=1
|
|
vmov.s32 q0, #0 @ accumulator
|
|
1: vld1.16 {q1}, [r1]! @ src[0..7]
|
|
vld1.16 {q2}, [r2]! @ filter[0..7]
|
|
vmlal.s16 q0, d2, d4 @ accumulator += src[0..3] * filter[0..3]
|
|
vmlal.s16 q0, d3, d5 @ accumulator += src[4..7] * filter[4..7]
|
|
subs r3, #8 @ filter_length -= 8
|
|
bgt 1b @ loop until filter_length
|
|
vpadd.s32 d0, d0, d1 @ pair adding of the 4x32-bit accumulated values
|
|
vpadd.s32 d0, d0, d0 @ pair adding of the 4x32-bit accumulator values
|
|
vst1.32 {d0[0]}, [r0] @ write accumulator
|
|
bx lr
|
|
endfunc
|