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;*****************************************************************************
;* x86-optimized functions for interlace filter
;*
;* Copyright (C) 2014 Kieran Kunhya <kierank@obe.tv>
;*
;* This file is part of Libav.
;*
;* Libav is free software; you can redistribute it and/or modify
;* it under the terms of the GNU General Public License as published by
;* the Free Software Foundation; either version 2 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 General Public License for more details.
;*
;* You should have received a copy of the GNU 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/x86/x86util.asm"
SECTION_RODATA
SECTION .text
%macro LOWPASS_LINE 0
cglobal lowpass_line, 5, 5, 7
add r0, r1
add r2, r1
add r3, r1
add r4, r1
neg r1
pxor m6, m6
.loop
mova m0, [r2+r1]
punpcklbw m1, m0, m6
punpckhbw m0, m6
paddw m0, m0
paddw m1, m1
mova m2, [r3+r1]
punpcklbw m3, m2, m6
punpckhbw m2, m6
mova m4, [r4+r1]
punpcklbw m5, m4, m6
punpckhbw m4, m6
paddw m1, m3
pavgw m1, m5
paddw m0, m2
pavgw m0, m4
psrlw m0, 1
psrlw m1, 1
packuswb m1, m0
mova [r0+r1], m1
add r1, mmsize
jl .loop
REP_RET
%endmacro
INIT_XMM sse2
LOWPASS_LINE
INIT_XMM avx
LOWPASS_LINE
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