;****************************************************************************** ;* x86-SIMD-optimized IDCT for prores ;* this is identical to "simple" IDCT written by Michael Niedermayer ;* except for the clip range ;* ;* Copyright (c) 2011 Ronald S. Bultje <rsbultje@gmail.com> ;* ;* 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 ;* 51, Inc., Foundation Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA ;******************************************************************************
; add SECTION_RODATA and proper include before including this file!
IDCT_1D %1, %2, %8
%elif %2 == 11 ; This copies the DC-only shortcut. When there is only a DC coefficient the ; C shifts the value and splats it to all coeffs rather than multiplying and ; doing the full IDCT. This causes a difference on 8-bit because the ; coefficient is 16383 rather than 16384 (which you can get with shifting).
por m1, m8, m13
por m1, m12
por m1, [blockq+ 16] ; { row[1] }[0-7]
por m1, [blockq+ 48] ; { row[3] }[0-7]
por m1, [blockq+ 80] ; { row[5] }[0-7]
por m1, [blockq+112] ; { row[7] }[0-7]
pxor m2, m2
pcmpeqw m1, m2
psllw m2, m10, 3
pand m2, m1
pcmpeqb m3, m3
pxor m1, m3
mova [rsp], m1
mova [rsp+16], m2
IDCT_1D %1, %2
mova m5, [rsp]
mova m6, [rsp+16]
pand m8, m5
por m8, m6
pand m0, m5
por m0, m6
pand m1, m5
por m1, m6
pand m2, m5
por m2, m6
pand m4, m5
por m4, m6
pand m11, m5
por m11, m6
pand m9, m5
por m9, m6
pand m10, m5
por m10, m6
%else
IDCT_1D %1, %2
%endif
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