mirror of
https://github.com/FFmpeg/FFmpeg.git
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bbe95f7353
From x86inc: > On AMD cpus <=K10, an ordinary ret is slow if it immediately follows either > a branch or a branch target. So switch to a 2-byte form of ret in that case. > We can automatically detect "follows a branch", but not a branch target. > (SSSE3 is a sufficient condition to know that your cpu doesn't have this problem.) x86inc can automatically determine whether to use REP_RET rather than REP in most of these cases, so impact is minimal. Additionally, a few REP_RETs were used unnecessary, despite the return being nowhere near a branch. The only CPUs affected were AMD K10s, made between 2007 and 2011, 16 years ago and 12 years ago, respectively. In the future, everyone involved with x86inc should consider dropping REP_RETs altogether.
327 lines
7.9 KiB
NASM
327 lines
7.9 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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;* Copyright (C) 2014 James Almer
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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_RODATA
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vector: db 0,1,4,5,8,9,12,13,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,0,1,4,5,8,9,12,13,
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SECTION .text
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%macro PMACSDQL 5
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%if cpuflag(xop)
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pmacsdql %1, %2, %3, %1
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%else
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pmuldq %2, %3
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paddq %1, %2
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%endif
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%endmacro
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%macro LPC_32 1
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INIT_XMM %1
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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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PMACSDQL m2, m0, m1, m2, m0
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movd m0, [decodedq+jq*4]
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PMACSDQL m3, m1, m0, 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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PMACSDQL m2, m0, m1, 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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PMACSDQL m3, m1, m0, 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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RET
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%endmacro
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%if HAVE_XOP_EXTERNAL
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LPC_32 xop
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%endif
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LPC_32 sse4
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;----------------------------------------------------------------------------------
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;void ff_flac_decorrelate_[lrm]s_16_sse2(uint8_t **out, int32_t **in, int channels,
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; int len, int shift);
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;----------------------------------------------------------------------------------
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%macro FLAC_DECORRELATE_16 3-4
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cglobal flac_decorrelate_%1_16, 2, 4, 4, out, in0, in1, len
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%ifidn %1, indep2
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VBROADCASTI128 m2, [vector]
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%endif
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%if ARCH_X86_32
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mov lend, lenm
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%endif
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movd m3, r4m
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shl lend, 2
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mov in1q, [in0q + gprsize]
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mov in0q, [in0q]
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mov outq, [outq]
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add in1q, lenq
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add in0q, lenq
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add outq, lenq
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neg lenq
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align 16
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.loop:
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mova m0, [in0q + lenq]
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mova m1, [in1q + lenq]
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%ifidn %1, ms
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psrad m2, m1, 1
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psubd m0, m2
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%endif
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%ifnidn %1, indep2
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p%4d m2, m0, m1
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packssdw m%2, m%2
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packssdw m%3, m%3
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punpcklwd m%2, m%3
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psllw m%2, m3
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%else
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pslld m%2, m3
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pslld m%3, m3
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pshufb m%2, m%2, m2
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pshufb m%3, m%3, m2
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punpcklwd m%2, m%3
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%endif
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mova [outq + lenq], m%2
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add lenq, 16
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jl .loop
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RET
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%endmacro
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INIT_XMM sse2
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FLAC_DECORRELATE_16 ls, 0, 2, sub
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FLAC_DECORRELATE_16 rs, 2, 1, add
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FLAC_DECORRELATE_16 ms, 2, 0, add
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;----------------------------------------------------------------------------------
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;void ff_flac_decorrelate_[lrm]s_32_sse2(uint8_t **out, int32_t **in, int channels,
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; int len, int shift);
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;----------------------------------------------------------------------------------
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%macro FLAC_DECORRELATE_32 5
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cglobal flac_decorrelate_%1_32, 2, 4, 4, out, in0, in1, len
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%if ARCH_X86_32
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mov lend, lenm
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%endif
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movd m3, r4m
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mov in1q, [in0q + gprsize]
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mov in0q, [in0q]
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mov outq, [outq]
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sub in1q, in0q
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align 16
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.loop:
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mova m0, [in0q]
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mova m1, [in0q + in1q]
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%ifidn %1, ms
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psrad m2, m1, 1
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psubd m0, m2
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%endif
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p%5d m2, m0, m1
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pslld m%2, m3
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pslld m%3, m3
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SBUTTERFLY dq, %2, %3, %4
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mova [outq ], m%2
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mova [outq + mmsize], m%3
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add in0q, mmsize
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add outq, mmsize*2
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sub lend, mmsize/4
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jg .loop
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RET
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%endmacro
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INIT_XMM sse2
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FLAC_DECORRELATE_32 ls, 0, 2, 1, sub
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FLAC_DECORRELATE_32 rs, 2, 1, 0, add
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FLAC_DECORRELATE_32 ms, 2, 0, 1, add
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;-----------------------------------------------------------------------------------------
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;void ff_flac_decorrelate_indep<ch>_<bps>_<opt>(uint8_t **out, int32_t **in, int channels,
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; int len, int shift);
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;-----------------------------------------------------------------------------------------
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;%1 = bps
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;%2 = channels
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;%3 = last xmm reg used
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;%4 = word/dword (shift instruction)
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%macro FLAC_DECORRELATE_INDEP 4
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%define REPCOUNT %2/(32/%1) ; 16bits = channels / 2; 32bits = channels
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cglobal flac_decorrelate_indep%2_%1, 2, %2+2, %3+1, out, in0, in1, len, in2, in3, in4, in5, in6, in7
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%if ARCH_X86_32
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%if %2 == 6
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DEFINE_ARGS out, in0, in1, in2, in3, in4, in5
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%define lend dword r3m
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%else
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mov lend, lenm
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%endif
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%endif
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movd m%3, r4m
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%assign %%i 1
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%rep %2-1
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mov in %+ %%i %+ q, [in0q+%%i*gprsize]
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%assign %%i %%i+1
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%endrep
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mov in0q, [in0q]
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mov outq, [outq]
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%assign %%i 1
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%rep %2-1
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sub in %+ %%i %+ q, in0q
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%assign %%i %%i+1
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%endrep
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align 16
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.loop:
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mova m0, [in0q]
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%assign %%i 1
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%rep REPCOUNT-1
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mova m %+ %%i, [in0q + in %+ %%i %+ q]
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%assign %%i %%i+1
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%endrep
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%if %1 == 32
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%if %2 == 8
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TRANSPOSE8x4D 0, 1, 2, 3, 4, 5, 6, 7, 8
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%elif %2 == 6
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SBUTTERFLY dq, 0, 1, 6
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SBUTTERFLY dq, 2, 3, 6
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SBUTTERFLY dq, 4, 5, 6
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punpcklqdq m6, m0, m2
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punpckhqdq m2, m4
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shufps m4, m0, 0xe4
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punpcklqdq m0, m1, m3
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punpckhqdq m3, m5
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shufps m5, m1, 0xe4
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SWAP 0,6,1,4,5,3
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%elif %2 == 4
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TRANSPOSE4x4D 0, 1, 2, 3, 4
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%else ; %2 == 2
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SBUTTERFLY dq, 0, 1, 2
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%endif
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%else ; %1 == 16
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%if %2 == 8
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packssdw m0, [in0q + in4q]
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packssdw m1, [in0q + in5q]
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packssdw m2, [in0q + in6q]
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packssdw m3, [in0q + in7q]
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TRANSPOSE2x4x4W 0, 1, 2, 3, 4
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%elif %2 == 6
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packssdw m0, [in0q + in3q]
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packssdw m1, [in0q + in4q]
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packssdw m2, [in0q + in5q]
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pshufd m3, m0, q1032
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punpcklwd m0, m1
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punpckhwd m1, m2
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punpcklwd m2, m3
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shufps m3, m0, m2, q2020
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shufps m0, m1, q2031
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shufps m2, m1, q3131
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shufps m1, m2, m3, q3120
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shufps m3, m0, q0220
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shufps m0, m2, q3113
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SWAP 2, 0, 3
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%else ; %2 == 4
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packssdw m0, [in0q + in2q]
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packssdw m1, [in0q + in3q]
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SBUTTERFLY wd, 0, 1, 2
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SBUTTERFLY dq, 0, 1, 2
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%endif
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%endif
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%assign %%i 0
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%rep REPCOUNT
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psll%4 m %+ %%i, m%3
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%assign %%i %%i+1
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%endrep
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%assign %%i 0
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%rep REPCOUNT
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mova [outq + %%i*mmsize], m %+ %%i
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%assign %%i %%i+1
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%endrep
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add in0q, mmsize
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add outq, mmsize*REPCOUNT
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sub lend, mmsize/4
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jg .loop
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RET
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%endmacro
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INIT_XMM ssse3
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FLAC_DECORRELATE_16 indep2, 0, 1 ; Reuse stereo 16bits macro
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FLAC_DECORRELATE_INDEP 32, 2, 3, d
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FLAC_DECORRELATE_INDEP 16, 4, 3, w
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FLAC_DECORRELATE_INDEP 32, 4, 5, d
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FLAC_DECORRELATE_INDEP 16, 6, 4, w
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FLAC_DECORRELATE_INDEP 32, 6, 7, d
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%if ARCH_X86_64
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FLAC_DECORRELATE_INDEP 16, 8, 5, w
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FLAC_DECORRELATE_INDEP 32, 8, 9, d
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%endif
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INIT_XMM avx
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FLAC_DECORRELATE_INDEP 32, 4, 5, d
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FLAC_DECORRELATE_INDEP 32, 6, 7, d
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%if ARCH_X86_64
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FLAC_DECORRELATE_INDEP 16, 8, 5, w
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FLAC_DECORRELATE_INDEP 32, 8, 9, d
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%endif
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