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9c978f243a
benchmarked on sandybridge x86_64: 1358232 decicycles in flac_lpc_32_c 1244575 decicycles in flac_lpc_32_sse4, James Almer's patch 650045 decicycles in flac_lpc_32_sse4, this patch I haven't tested the edgecases such as odd block lengths odd block length tested-by: James Almer <jamrial@gmail.com> Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
72 lines
2.0 KiB
NASM
72 lines
2.0 KiB
NASM
;******************************************************************************
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;* FLAC DSP SIMD optimizations
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;*
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;* Copyright (C) 2014 Loren Merritt
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;*
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;* This file is part of FFmpeg.
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;*
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;* FFmpeg 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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;* FFmpeg 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 FFmpeg; 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/x86/x86util.asm"
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SECTION .text
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INIT_XMM sse4
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cglobal flac_lpc_32, 5,6,5, decoded, coeffs, pred_order, qlevel, len, j
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sub lend, pred_orderd
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jle .ret
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lea decodedq, [decodedq+pred_orderq*4-8]
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lea coeffsq, [coeffsq+pred_orderq*4]
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neg pred_orderq
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movd m4, qlevelm
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ALIGN 16
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.loop_sample:
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movd m0, [decodedq+pred_orderq*4+8]
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add decodedq, 8
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movd m1, [coeffsq+pred_orderq*4]
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pxor m2, m2
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pxor m3, m3
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lea jq, [pred_orderq+1]
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test jq, jq
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jz .end_order
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.loop_order:
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pmuldq m0, m1
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paddq m2, m0
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movd m0, [decodedq+jq*4]
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pmuldq m1, m0
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paddq m3, m1
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movd m1, [coeffsq+jq*4]
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inc jq
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jl .loop_order
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.end_order:
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pmuldq m0, m1
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paddq m2, m0
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psrlq m2, m4
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movd m0, [decodedq]
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paddd m0, m2
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movd [decodedq], m0
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sub lend, 2
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jl .ret
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pmuldq m1, m0
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paddq m3, m1
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psrlq m3, m4
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movd m1, [decodedq+4]
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paddd m1, m3
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movd [decodedq+4], m1
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jg .loop_sample
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.ret:
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REP_RET
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