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ac3dsp_neon.S
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ac3dsp_neon.S
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/*
* Copyright (c) 2011 Mans Rullgard <[email protected]>
*
* 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 "libavutil/arm/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
function ff_ac3_sum_square_butterfly_int32_neon, export=1
vmov.i64 q0, #0
vmov.i64 q1, #0
vmov.i64 q2, #0
vmov.i64 q3, #0
1:
vld1.32 {d16}, [r1]!
vld1.32 {d17}, [r2]!
vadd.s32 d18, d16, d17
vsub.s32 d19, d16, d17
vmlal.s32 q0, d16, d16
vmlal.s32 q1, d17, d17
vmlal.s32 q2, d18, d18
vmlal.s32 q3, d19, d19
subs r3, r3, #2
bgt 1b
vadd.s64 d0, d0, d1
vadd.s64 d1, d2, d3
vadd.s64 d2, d4, d5
vadd.s64 d3, d6, d7
vst1.64 {q0-q1}, [r0]
bx lr
endfunc
function ff_ac3_sum_square_butterfly_float_neon, export=1
vmov.f32 q0, #0.0
vmov.f32 q1, #0.0
1:
vld1.32 {d16}, [r1]!
vld1.32 {d17}, [r2]!
vadd.f32 d18, d16, d17
vsub.f32 d19, d16, d17
vmla.f32 d0, d16, d16
vmla.f32 d1, d17, d17
vmla.f32 d2, d18, d18
vmla.f32 d3, d19, d19
subs r3, r3, #2
bgt 1b
vpadd.f32 d0, d0, d1
vpadd.f32 d1, d2, d3
vst1.32 {q0}, [r0]
bx lr
endfunc