mirror of https://github.com/FFmpeg/FFmpeg.git
From the ARMv7 NEON version. 16 times faster as the C version, overall more than 12% faster vorbis decoding on Apple's A7.pull/67/merge
Janne Grunau
11 years ago
parent
8f9fe6ae34
commit
3956a5e0ea
5 changed files with 122 additions and 0 deletions
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/*
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* This file is part of Libav. |
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* |
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* Libav is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* Libav is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with Libav; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "libavutil/attributes.h" |
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#include "libavutil/cpu.h" |
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#include "libavutil/aarch64/cpu.h" |
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#include "libavcodec/vorbisdsp.h" |
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void ff_vorbis_inverse_coupling_neon(float *mag, float *ang, |
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intptr_t blocksize); |
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av_cold void ff_vorbisdsp_init_aarch64(VorbisDSPContext *c) |
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{ |
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int cpu_flags = av_get_cpu_flags(); |
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if (have_neon(cpu_flags)) { |
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c->vorbis_inverse_coupling = ff_vorbis_inverse_coupling_neon; |
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} |
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} |
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/* |
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* Copyright (c) 2008 Mans Rullgard <mans@mansr.com>
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* |
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* This file is part of Libav. |
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* |
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* Libav is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "libavutil/aarch64/asm.S" |
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function ff_vorbis_inverse_coupling_neon, export=1 |
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movi v20.4s, #1<<7, lsl #24 |
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subs x2, x2, #4 |
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mov x3, x0 |
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mov x4, x1 |
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b.eq 3f |
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ld1 {v7.4s}, [x1], #16 |
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ld1 {v6.4s}, [x0], #16 |
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cmle v4.4s, v7.4s, #0 |
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and v5.16b, v6.16b, v20.16b |
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eor v7.16b, v7.16b, v5.16b |
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and v2.16b, v7.16b, v4.16b |
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bic v3.16b, v7.16b, v4.16b |
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fadd v7.4s, v6.4s, v2.4s |
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fsub v6.4s, v6.4s, v3.4s |
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1: ld1 {v1.4s}, [x1], #16 |
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ld1 {v0.4s}, [x0], #16 |
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cmle v4.4s, v1.4s, #0 |
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and v5.16b, v0.16b, v20.16b |
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eor v1.16b, v1.16b, v5.16b |
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st1 {v7.4s}, [x3], #16 |
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st1 {v6.4s}, [x4], #16 |
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and v2.16b, v1.16b, v4.16b |
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bic v3.16b, v1.16b, v4.16b |
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fadd v1.4s, v0.4s, v2.4s |
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fsub v0.4s, v0.4s, v3.4s |
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subs x2, x2, #8 |
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b.le 2f |
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ld1 {v7.4s}, [x1], #16 |
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ld1 {v6.4s}, [x0], #16 |
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cmle v4.4s, v7.4s, #0 |
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and v5.16b, v6.16b, v20.16b |
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eor v7.16b, v7.16b, v5.16b |
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st1 {v1.4s}, [x3], #16 |
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st1 {v0.4s}, [x4], #16 |
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and v2.16b, v7.16b, v4.16b |
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bic v3.16b, v7.16b, v4.16b |
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fadd v7.4s, v6.4s, v2.4s |
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fsub v6.4s, v6.4s, v3.4s |
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b 1b |
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2: st1 {v1.4s}, [x3], #16 |
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st1 {v0.4s}, [x4], #16 |
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b.lt ret |
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3: ld1 {v1.4s}, [x1] |
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ld1 {v0.4s}, [x0] |
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cmle v4.4s, v1.4s, #0 |
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and v5.16b, v0.16b, v20.16b |
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eor v1.16b, v1.16b, v5.16b |
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and v2.16b, v1.16b, v4.16b |
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bic v3.16b, v1.16b, v4.16b |
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fadd v1.4s, v0.4s, v2.4s |
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fsub v0.4s, v0.4s, v3.4s |
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st1 {v1.4s}, [x0], #16 |
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st1 {v0.4s}, [x1], #16 |
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ret: |
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ret |
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endfunc |
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