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; Chinese AVS video (AVS1-P2, JiZhun profile) decoder
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; Copyright (c) 2006 Stefan Gehrer <stefan.gehrer@gmx.de>
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;
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; MMX-optimized DSP functions, based on H.264 optimizations by
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; Michael Niedermayer and Loren Merritt
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; Conversion from gcc syntax to x264asm syntax with modifications
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; by Ronald S. Bultje <rsbultje@gmail.com>
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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 License
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; along with FFmpeg; if not, write to the Free Software Foundation,
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; Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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%include "libavutil/x86/x86util.asm"
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cextern pw_4
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cextern pw_64
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SECTION .text
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%macro CAVS_IDCT8_1D 2-3 1 ; source, round, init_load
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%if %3 == 1
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mova m4, [%1+7*16] ; m4 = src7
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mova m5, [%1+1*16] ; m5 = src1
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mova m2, [%1+5*16] ; m2 = src5
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mova m7, [%1+3*16] ; m7 = src3
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%else
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SWAP 1, 7
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SWAP 4, 6
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%endif
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mova m0, m4
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mova m3, m5
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mova m6, m2
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mova m1, m7
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paddw m4, m4 ; m4 = 2*src7
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paddw m3, m3 ; m3 = 2*src1
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paddw m6, m6 ; m6 = 2*src5
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paddw m1, m1 ; m1 = 2*src3
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paddw m0, m4 ; m0 = 3*src7
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paddw m5, m3 ; m5 = 3*src1
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paddw m2, m6 ; m2 = 3*src5
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paddw m7, m1 ; m7 = 3*src3
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psubw m5, m4 ; m5 = 3*src1 - 2*src7 = a0
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paddw m7, m6 ; m7 = 3*src3 - 2*src5 = a1
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psubw m1, m2 ; m1 = 2*src3 - 3*src5 = a2
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paddw m3, m0 ; m3 = 2*src1 - 3*src7 = a3
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mova m4, m5
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mova m6, m7
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mova m0, m3
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mova m2, m1
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SUMSUB_BA w, 7, 5 ; m7 = a0 + a1, m5 = a0 - a1
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paddw m7, m3 ; m7 = a0 + a1 + a3
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paddw m5, m1 ; m5 = a0 - a1 + a2
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paddw m7, m7
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paddw m5, m5
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paddw m7, m6 ; m7 = b4
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paddw m5, m4 ; m5 = b5
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SUMSUB_BA w, 1, 3 ; m1 = a3 + a2, m3 = a3 - a2
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psubw m4, m1 ; m4 = a0 - a2 - a3
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mova m1, m4 ; m1 = a0 - a2 - a3
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psubw m3, m6 ; m3 = a3 - a2 - a1
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paddw m1, m1
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paddw m3, m3
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psubw m1, m2 ; m1 = b7
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paddw m3, m0 ; m3 = b6
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mova m2, [%1+2*16] ; m2 = src2
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mova m6, [%1+6*16] ; m6 = src6
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mova m4, m2
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mova m0, m6
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psllw m4, 2 ; m4 = 4*src2
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psllw m6, 2 ; m6 = 4*src6
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paddw m2, m4 ; m2 = 5*src2
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paddw m0, m6 ; m0 = 5*src6
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paddw m2, m2
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paddw m0, m0
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psubw m4, m0 ; m4 = 4*src2 - 10*src6 = a7
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paddw m6, m2 ; m6 = 4*src6 + 10*src2 = a6
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mova m2, [%1+0*16] ; m2 = src0
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mova m0, [%1+4*16] ; m0 = src4
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SUMSUB_BA w, 0, 2 ; m0 = src0 + src4, m2 = src0 - src4
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psllw m0, 3
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psllw m2, 3
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paddw m0, %2 ; add rounding bias
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paddw m2, %2 ; add rounding bias
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SUMSUB_BA w, 6, 0 ; m6 = a4 + a6, m0 = a4 - a6
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SUMSUB_BA w, 4, 2 ; m4 = a5 + a7, m2 = a5 - a7
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SUMSUB_BA w, 7, 6 ; m7 = dst0, m6 = dst7
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SUMSUB_BA w, 5, 4 ; m5 = dst1, m4 = dst6
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SUMSUB_BA w, 3, 2 ; m3 = dst2, m2 = dst5
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SUMSUB_BA w, 1, 0 ; m1 = dst3, m0 = dst4
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%endmacro
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INIT_XMM sse2
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cglobal cavs_idct8, 2, 2, 8 + ARCH_X86_64, 0 - 8 * 16, out, in
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CAVS_IDCT8_1D inq, [pw_4]
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psraw m7, 3
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psraw m6, 3
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psraw m5, 3
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psraw m4, 3
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psraw m3, 3
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psraw m2, 3
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psraw m1, 3
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psraw m0, 3
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%if ARCH_X86_64
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TRANSPOSE8x8W 7, 5, 3, 1, 0, 2, 4, 6, 8
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mova [rsp+4*16], m0
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%else
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mova [rsp+0*16], m4
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TRANSPOSE8x8W 7, 5, 3, 1, 0, 2, 4, 6, [rsp+0*16], [rsp+4*16], 1
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%endif
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mova [rsp+0*16], m7
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mova [rsp+2*16], m3
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mova [rsp+6*16], m4
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CAVS_IDCT8_1D rsp, [pw_64], 0
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psraw m7, 7
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psraw m6, 7
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psraw m5, 7
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psraw m4, 7
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psraw m3, 7
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psraw m2, 7
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psraw m1, 7
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psraw m0, 7
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mova [outq+0*16], m7
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mova [outq+1*16], m5
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mova [outq+2*16], m3
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mova [outq+3*16], m1
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mova [outq+4*16], m0
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mova [outq+5*16], m2
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mova [outq+6*16], m4
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mova [outq+7*16], m6
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RET
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