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;******************************************************************************
;* X86 Optimized functions for Open Exr Decoder
;* Copyright (c) 2006 Industrial Light & Magic, a division of Lucas Digital Ltd. LLC
;*
;* reorder_pixels, predictor based on patch by John Loy
;* port to ASM by Jokyo Images support by CNC - French National Center for Cinema
;*
;* predictor AVX/AVX2 by Henrik Gramner
;*
;* This file is part of FFmpeg.
;*
;* FFmpeg 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.
;*
;* FFmpeg 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 FFmpeg; if not, write to the Free Software
;* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
;******************************************************************************
%include "libavutil/x86/x86util.asm"
cextern pb_15
cextern pb_80
SECTION .text
;------------------------------------------------------------------------------
; void ff_reorder_pixels(uint8_t *dst, const uint8_t *src, ptrdiff_t size);
;------------------------------------------------------------------------------
%macro REORDER_PIXELS 0
cglobal reorder_pixels, 3,4,3, dst, src1, size, src2
lea src2q, [src1q+sizeq] ; src2 = src + 2 * half_size
add dstq, sizeq ; dst offset by size
shr sizeq, 1 ; half_size
add src1q, sizeq ; offset src by half_size
neg sizeq ; size = offset for dst, src1, src2
.loop:
mova m0, [src1q+sizeq] ; load first part
movu m1, [src2q+sizeq] ; load second part
SBUTTERFLY bw, 0, 1, 2 ; interleaved
mova [dstq+2*sizeq ], xm0 ; copy to dst
mova [dstq+2*sizeq+16], xm1
%if cpuflag(avx2)
vperm2i128 m0, m0, m1, q0301
mova [dstq+2*sizeq+32], m0
%endif
add sizeq, mmsize
jl .loop
RET
%endmacro
INIT_XMM sse2
REORDER_PIXELS
%if HAVE_AVX2_EXTERNAL
INIT_YMM avx2
REORDER_PIXELS
%endif
;------------------------------------------------------------------------------
; void ff_predictor(uint8_t *src, ptrdiff_t size);
;------------------------------------------------------------------------------
%macro PREDICTOR 0
cglobal predictor, 2,2,5, src, size
%if mmsize == 32
vbroadcasti128 m0, [pb_80]
%else
mova xm0, [pb_80]
%endif
mova xm1, [pb_15]
mova xm2, xm0
add srcq, sizeq
neg sizeq
.loop:
pxor m3, m0, [srcq + sizeq]
pslldq m4, m3, 1
paddb m3, m4
pslldq m4, m3, 2
paddb m3, m4
pslldq m4, m3, 4
paddb m3, m4
pslldq m4, m3, 8
%if mmsize == 32
paddb m3, m4
paddb xm2, xm3
vextracti128 xm4, m3, 1
mova [srcq + sizeq], xm2
pshufb xm2, xm1
paddb xm2, xm4
mova [srcq + sizeq + 16], xm2
%else
paddb m2, m3
paddb m2, m4
mova [srcq + sizeq], m2
%endif
pshufb xm2, xm1
add sizeq, mmsize
jl .loop
RET
%endmacro
INIT_XMM ssse3
PREDICTOR
INIT_XMM avx
PREDICTOR
%if HAVE_AVX2_EXTERNAL
INIT_YMM avx2
PREDICTOR
%endif
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