mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
111 lines
3.5 KiB
ArmAsm
111 lines
3.5 KiB
ArmAsm
/*
|
|
* Copyright (c) 2011 Mans Rullgard <mans@mansr.com>
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav 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.
|
|
*
|
|
* Libav 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 Libav; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "asm.S"
|
|
|
|
function ff_ac3_max_msb_abs_int16_neon, export=1
|
|
vmov.i16 q0, #0
|
|
vmov.i16 q2, #0
|
|
1: vld1.16 {q1}, [r0,:128]!
|
|
vabs.s16 q1, q1
|
|
vld1.16 {q3}, [r0,:128]!
|
|
vabs.s16 q3, q3
|
|
vorr q0, q0, q1
|
|
vorr q2, q2, q3
|
|
subs r1, r1, #16
|
|
bgt 1b
|
|
vorr q0, q0, q2
|
|
vorr d0, d0, d1
|
|
vpmax.u16 d0, d0, d0
|
|
vpmax.u16 d0, d0, d0
|
|
vmov.u16 r0, d0[0]
|
|
bx lr
|
|
endfunc
|
|
|
|
function ff_ac3_exponent_min_neon, export=1
|
|
cmp r1, #0
|
|
it eq
|
|
bxeq lr
|
|
push {lr}
|
|
mov r12, #256
|
|
1:
|
|
vld1.8 {q0}, [r0,:128]
|
|
mov lr, r1
|
|
add r3, r0, #256
|
|
2: vld1.8 {q1}, [r3,:128], r12
|
|
subs lr, lr, #1
|
|
vmin.u8 q0, q0, q1
|
|
bgt 2b
|
|
subs r2, r2, #16
|
|
vst1.8 {q0}, [r0,:128]!
|
|
bgt 1b
|
|
pop {pc}
|
|
endfunc
|
|
|
|
function ff_ac3_lshift_int16_neon, export=1
|
|
vdup.16 q0, r2
|
|
1: vld1.16 {q1}, [r0,:128]
|
|
vshl.s16 q1, q1, q0
|
|
vst1.16 {q1}, [r0,:128]!
|
|
subs r1, r1, #8
|
|
bgt 1b
|
|
bx lr
|
|
endfunc
|
|
|
|
function ff_ac3_rshift_int32_neon, export=1
|
|
rsb r2, r2, #0
|
|
vdup.32 q0, r2
|
|
1: vld1.32 {q1}, [r0,:128]
|
|
vshl.s32 q1, q1, q0
|
|
vst1.32 {q1}, [r0,:128]!
|
|
subs r1, r1, #4
|
|
bgt 1b
|
|
bx lr
|
|
endfunc
|
|
|
|
function ff_float_to_fixed24_neon, export=1
|
|
1: vld1.32 {q0-q1}, [r1,:128]!
|
|
vcvt.s32.f32 q0, q0, #24
|
|
vld1.32 {q2-q3}, [r1,:128]!
|
|
vcvt.s32.f32 q1, q1, #24
|
|
vcvt.s32.f32 q2, q2, #24
|
|
vst1.32 {q0-q1}, [r0,:128]!
|
|
vcvt.s32.f32 q3, q3, #24
|
|
vst1.32 {q2-q3}, [r0,:128]!
|
|
subs r2, r2, #16
|
|
bgt 1b
|
|
bx lr
|
|
endfunc
|
|
|
|
function ff_ac3_extract_exponents_neon, export=1
|
|
vmov.i32 q15, #8
|
|
1:
|
|
vld1.32 {q0}, [r1,:128]!
|
|
vabs.s32 q1, q0
|
|
vclz.i32 q3, q1
|
|
vsub.i32 q3, q3, q15
|
|
vmovn.i32 d6, q3
|
|
vmovn.i16 d6, q3
|
|
vst1.32 {d6[0]}, [r0,:32]!
|
|
subs r2, r2, #4
|
|
bgt 1b
|
|
bx lr
|
|
endfunc
|