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652 lines
16 KiB
652 lines
16 KiB
/* |
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* Copyright (C) 2004 the ffmpeg project |
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* |
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* This library 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 of the License, or (at your option) any later version. |
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* |
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* This library 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 this library; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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/** |
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* @file vp3dsp_mmx.c |
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* MMX-optimized functions cribbed from the original VP3 source code. |
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*/ |
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#include "../dsputil.h" |
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#include "mmx.h" |
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#define IdctAdjustBeforeShift 8 |
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/* (12 * 4) 2-byte memory locations ( = 96 bytes total) |
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* idct_constants[0..15] = Mask table (M(I)) |
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* idct_constants[16..43] = Cosine table (C(I)) |
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* idct_constants[44..47] = 8 |
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*/ |
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static uint16_t idct_constants[(4 + 7 + 1) * 4]; |
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static uint16_t idct_cosine_table[7] = { |
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64277, 60547, 54491, 46341, 36410, 25080, 12785 |
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}; |
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#define r0 mm0 |
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#define r1 mm1 |
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#define r2 mm2 |
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#define r3 mm3 |
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#define r4 mm4 |
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#define r5 mm5 |
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#define r6 mm6 |
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#define r7 mm7 |
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/* from original comments: The Macro does IDct on 4 1-D Dcts */ |
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#define BeginIDCT() \ |
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movq_m2r(*I(3), r2); \ |
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movq_m2r(*C(3), r6); \ |
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movq_r2r(r2, r4); \ |
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movq_m2r(*J(5), r7); \ |
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pmulhw_r2r(r6, r4); \ |
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movq_m2r(*C(5), r1); \ |
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pmulhw_r2r(r7, r6); \ |
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movq_r2r(r1, r5); \ |
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pmulhw_r2r(r2, r1); \ |
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movq_m2r(*I(1), r3); \ |
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pmulhw_r2r(r7, r5); \ |
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movq_m2r(*C(1), r0); \ |
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paddw_r2r(r2, r4); \ |
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paddw_r2r(r7, r6); \ |
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paddw_r2r(r1, r2); \ |
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movq_m2r(*J(7), r1); \ |
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paddw_r2r(r5, r7); \ |
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movq_r2r(r0, r5); \ |
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pmulhw_r2r(r3, r0); \ |
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paddsw_r2r(r7, r4); \ |
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pmulhw_r2r(r1, r5); \ |
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movq_m2r(*C(7), r7); \ |
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psubsw_r2r(r2, r6); \ |
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paddw_r2r(r3, r0); \ |
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pmulhw_r2r(r7, r3); \ |
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movq_m2r(*I(2), r2); \ |
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pmulhw_r2r(r1, r7); \ |
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paddw_r2r(r1, r5); \ |
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movq_r2r(r2, r1); \ |
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pmulhw_m2r(*C(2), r2); \ |
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psubsw_r2r(r5, r3); \ |
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movq_m2r(*J(6), r5); \ |
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paddsw_r2r(r7, r0); \ |
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movq_r2r(r5, r7); \ |
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psubsw_r2r(r4, r0); \ |
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pmulhw_m2r(*C(2), r5); \ |
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paddw_r2r(r1, r2); \ |
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pmulhw_m2r(*C(6), r1); \ |
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paddsw_r2r(r4, r4); \ |
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paddsw_r2r(r0, r4); \ |
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psubsw_r2r(r6, r3); \ |
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paddw_r2r(r7, r5); \ |
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paddsw_r2r(r6, r6); \ |
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pmulhw_m2r(*C(6), r7); \ |
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paddsw_r2r(r3, r6); \ |
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movq_r2m(r4, *I(1)); \ |
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psubsw_r2r(r5, r1); \ |
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movq_m2r(*C(4), r4); \ |
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movq_r2r(r3, r5); \ |
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pmulhw_r2r(r4, r3); \ |
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paddsw_r2r(r2, r7); \ |
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movq_r2m(r6, *I(2)); \ |
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movq_r2r(r0, r2); \ |
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movq_m2r(*I(0), r6); \ |
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pmulhw_r2r(r4, r0); \ |
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paddw_r2r(r3, r5); \ |
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movq_m2r(*J(4), r3); \ |
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psubsw_r2r(r1, r5); \ |
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paddw_r2r(r0, r2); \ |
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psubsw_r2r(r3, r6); \ |
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movq_r2r(r6, r0); \ |
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pmulhw_r2r(r4, r6); \ |
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paddsw_r2r(r3, r3); \ |
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paddsw_r2r(r1, r1); \ |
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paddsw_r2r(r0, r3); \ |
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paddsw_r2r(r5, r1); \ |
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pmulhw_r2r(r3, r4); \ |
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paddsw_r2r(r0, r6); \ |
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psubsw_r2r(r2, r6); \ |
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paddsw_r2r(r2, r2); \ |
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movq_m2r(*I(1), r0); \ |
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paddsw_r2r(r6, r2); \ |
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paddw_r2r(r3, r4); \ |
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psubsw_r2r(r1, r2); |
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/* RowIDCT gets ready to transpose */ |
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#define RowIDCT() \ |
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\ |
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BeginIDCT() \ |
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\ |
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movq_m2r(*I(2), r3); \ |
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psubsw_r2r(r7, r4); \ |
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paddsw_r2r(r1, r1); \ |
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paddsw_r2r(r7, r7); \ |
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paddsw_r2r(r2, r1); \ |
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paddsw_r2r(r4, r7); \ |
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psubsw_r2r(r3, r4); \ |
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psubsw_r2r(r5, r6); \ |
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paddsw_r2r(r5, r5); \ |
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paddsw_r2r(r4, r3); \ |
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paddsw_r2r(r6, r5); \ |
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psubsw_r2r(r0, r7); \ |
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paddsw_r2r(r0, r0); \ |
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movq_r2m(r1, *I(1)); \ |
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paddsw_r2r(r7, r0); |
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/* Column IDCT normalizes and stores final results */ |
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#define ColumnIDCT() \ |
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\ |
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BeginIDCT() \ |
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\ |
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paddsw_m2r(*Eight, r2); \ |
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paddsw_r2r(r1, r1); \ |
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paddsw_r2r(r2, r1); \ |
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psraw_i2r(4, r2); \ |
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psubsw_r2r(r7, r4); \ |
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psraw_i2r(4, r1); \ |
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movq_m2r(*I(2), r3); \ |
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paddsw_r2r(r7, r7); \ |
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movq_r2m(r2, *I(2)); \ |
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paddsw_r2r(r4, r7); \ |
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movq_r2m(r1, *I(1)); \ |
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psubsw_r2r(r3, r4); \ |
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paddsw_m2r(*Eight, r4); \ |
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paddsw_r2r(r3, r3); \ |
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paddsw_r2r(r4, r3); \ |
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psraw_i2r(4, r4); \ |
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psubsw_r2r(r5, r6); \ |
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psraw_i2r(4, r3); \ |
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paddsw_m2r(*Eight, r6); \ |
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paddsw_r2r(r5, r5); \ |
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paddsw_r2r(r6, r5); \ |
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psraw_i2r(4, r6); \ |
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movq_r2m(r4, *J(4)); \ |
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psraw_i2r(4, r5); \ |
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movq_r2m(r3, *I(3)); \ |
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psubsw_r2r(r0, r7); \ |
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paddsw_m2r(*Eight, r7); \ |
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paddsw_r2r(r0, r0); \ |
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paddsw_r2r(r7, r0); \ |
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psraw_i2r(4, r7); \ |
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movq_r2m(r6, *J(6)); \ |
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psraw_i2r(4, r0); \ |
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movq_r2m(r5, *J(5)); \ |
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movq_r2m(r7, *J(7)); \ |
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movq_r2m(r0, *I(0)); |
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/* Following macro does two 4x4 transposes in place. |
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At entry (we assume): |
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r0 = a3 a2 a1 a0 |
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I(1) = b3 b2 b1 b0 |
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r2 = c3 c2 c1 c0 |
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r3 = d3 d2 d1 d0 |
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r4 = e3 e2 e1 e0 |
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r5 = f3 f2 f1 f0 |
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r6 = g3 g2 g1 g0 |
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r7 = h3 h2 h1 h0 |
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At exit, we have: |
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I(0) = d0 c0 b0 a0 |
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I(1) = d1 c1 b1 a1 |
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I(2) = d2 c2 b2 a2 |
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I(3) = d3 c3 b3 a3 |
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J(4) = h0 g0 f0 e0 |
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J(5) = h1 g1 f1 e1 |
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J(6) = h2 g2 f2 e2 |
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J(7) = h3 g3 f3 e3 |
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I(0) I(1) I(2) I(3) is the transpose of r0 I(1) r2 r3. |
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J(4) J(5) J(6) J(7) is the transpose of r4 r5 r6 r7. |
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Since r1 is free at entry, we calculate the Js first. */ |
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#define Transpose() \ |
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movq_r2r(r4, r1); \ |
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punpcklwd_r2r(r5, r4); \ |
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movq_r2m(r0, *I(0)); \ |
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punpckhwd_r2r(r5, r1); \ |
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movq_r2r(r6, r0); \ |
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punpcklwd_r2r(r7, r6); \ |
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movq_r2r(r4, r5); \ |
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punpckldq_r2r(r6, r4); \ |
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punpckhdq_r2r(r6, r5); \ |
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movq_r2r(r1, r6); \ |
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movq_r2m(r4, *J(4)); \ |
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punpckhwd_r2r(r7, r0); \ |
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movq_r2m(r5, *J(5)); \ |
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punpckhdq_r2r(r0, r6); \ |
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movq_m2r(*I(0), r4); \ |
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punpckldq_r2r(r0, r1); \ |
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movq_m2r(*I(1), r5); \ |
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movq_r2r(r4, r0); \ |
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movq_r2m(r6, *J(7)); \ |
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punpcklwd_r2r(r5, r0); \ |
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movq_r2m(r1, *J(6)); \ |
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punpckhwd_r2r(r5, r4); \ |
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movq_r2r(r2, r5); \ |
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punpcklwd_r2r(r3, r2); \ |
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movq_r2r(r0, r1); \ |
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punpckldq_r2r(r2, r0); \ |
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punpckhdq_r2r(r2, r1); \ |
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movq_r2r(r4, r2); \ |
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movq_r2m(r0, *I(0)); \ |
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punpckhwd_r2r(r3, r5); \ |
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movq_r2m(r1, *I(1)); \ |
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punpckhdq_r2r(r5, r4); \ |
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punpckldq_r2r(r5, r2); \ |
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movq_r2m(r4, *I(3)); \ |
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movq_r2m(r2, *I(2)); |
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void vp3_dsp_init_mmx(void) |
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{ |
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int j = 16; |
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uint16_t *p; |
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do { |
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idct_constants[--j] = 0; |
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} while (j); |
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idct_constants[0] = idct_constants[5] = |
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idct_constants[10] = idct_constants[15] = 65535; |
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j = 1; |
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do { |
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p = idct_constants + ((j + 3) << 2); |
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p[0] = p[1] = p[2] = p[3] = idct_cosine_table[j - 1]; |
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} while (++j <= 7); |
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idct_constants[44] = idct_constants[45] = |
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idct_constants[46] = idct_constants[47] = IdctAdjustBeforeShift; |
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} |
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static void vp3_idct_mmx(int16_t *input_data, int16_t *dequant_matrix, |
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int16_t *output_data) |
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{ |
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/* eax = quantized input |
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* ebx = dequantizer matrix |
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* ecx = IDCT constants |
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* M(I) = ecx + MaskOffset(0) + I * 8 |
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* C(I) = ecx + CosineOffset(32) + (I-1) * 8 |
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* edx = output |
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* r0..r7 = mm0..mm7 |
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*/ |
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#define M(x) (idct_constants + x * 4) |
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#define C(x) (idct_constants + 16 + (x - 1) * 4) |
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#define Eight (idct_constants + 44) |
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movq_m2r(*input_data, r0); |
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pmullw_m2r(*dequant_matrix, r0); |
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movq_m2r(*(input_data + 8), r1); |
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pmullw_m2r(*(dequant_matrix + 8), r1); |
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movq_m2r(*M(0), r2); |
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movq_r2r(r0, r3); |
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movq_m2r(*(input_data + 4), r4); |
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psrlq_i2r(16, r0); |
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pmullw_m2r(*(dequant_matrix + 4), r4); |
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pand_r2r(r2, r3); |
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movq_r2r(r0, r5); |
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movq_r2r(r1, r6); |
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pand_r2r(r2, r5); |
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psllq_i2r(32, r6); |
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movq_m2r(*M(3), r7); |
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pxor_r2r(r5, r0); |
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pand_r2r(r6, r7); |
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por_r2r(r3, r0); |
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pxor_r2r(r7, r6); |
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por_r2r(r7, r0); |
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movq_m2r(*M(3), r7); |
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movq_r2r(r4, r3); |
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movq_r2m(r0, *output_data); |
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pand_r2r(r2, r3); |
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movq_m2r(*(input_data + 16), r0); |
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psllq_i2r(16, r3); |
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pmullw_m2r(*(dequant_matrix + 16), r0); |
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pand_r2r(r1, r7); |
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por_r2r(r3, r5); |
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por_r2r(r6, r7); |
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movq_m2r(*(input_data + 12), r3); |
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por_r2r(r5, r7); |
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pmullw_m2r(*(dequant_matrix + 12), r3); |
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psrlq_i2r(16, r4); |
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movq_r2m(r7, *(output_data + 8)); |
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movq_r2r(r4, r5); |
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movq_r2r(r0, r7); |
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psrlq_i2r(16, r4); |
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psrlq_i2r(48, r7); |
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movq_r2r(r2, r6); |
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pand_r2r(r2, r5); |
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pand_r2r(r4, r6); |
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movq_r2m(r7, *(output_data + 40)); |
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pxor_r2r(r6, r4); |
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psrlq_i2r(32, r1); |
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por_r2r(r5, r4); |
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movq_m2r(*M(3), r7); |
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pand_r2r(r2, r1); |
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movq_m2r(*(input_data + 24), r5); |
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psllq_i2r(16, r0); |
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pmullw_m2r(*(dequant_matrix + 24), r5); |
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pand_r2r(r0, r7); |
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movq_r2m(r1, *(output_data + 32)); |
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por_r2r(r4, r7); |
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movq_r2r(r3, r4); |
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pand_r2r(r2, r3); |
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movq_m2r(*M(2), r1); |
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psllq_i2r(32, r3); |
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por_r2r(r3, r7); |
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movq_r2r(r5, r3); |
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psllq_i2r(48, r3); |
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pand_r2r(r0, r1); |
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movq_r2m(r7, *(output_data + 16)); |
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por_r2r(r3, r6); |
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movq_m2r(*M(1), r7); |
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por_r2r(r1, r6); |
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movq_m2r(*(input_data + 28), r1); |
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pand_r2r(r4, r7); |
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pmullw_m2r(*(dequant_matrix + 28), r1); |
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por_r2r(r6, r7); |
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pand_m2r(*M(1), r0); |
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psrlq_i2r(32, r4); |
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movq_r2m(r7, *(output_data + 24)); |
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movq_r2r(r4, r6); |
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movq_m2r(*M(3), r7); |
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pand_r2r(r2, r4); |
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movq_m2r(*M(1), r3); |
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pand_r2r(r1, r7); |
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pand_r2r(r5, r3); |
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por_r2r(r4, r0); |
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psllq_i2r(16, r3); |
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por_r2r(r0, r7); |
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movq_m2r(*M(2), r4); |
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por_r2r(r3, r7); |
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movq_m2r(*(input_data + 40), r0); |
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movq_r2r(r4, r3); |
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pmullw_m2r(*(dequant_matrix + 40), r0); |
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pand_r2r(r5, r4); |
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movq_r2m(r7, *(output_data + 4)); |
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por_r2r(r4, r6); |
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movq_r2r(r3, r4); |
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psrlq_i2r(16, r6); |
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movq_r2r(r0, r7); |
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pand_r2r(r1, r4); |
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psllq_i2r(48, r7); |
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por_r2r(r4, r6); |
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movq_m2r(*(input_data + 44), r4); |
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por_r2r(r6, r7); |
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pmullw_m2r(*(dequant_matrix + 44), r4); |
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psrlq_i2r(16, r3); |
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movq_r2m(r7, *(output_data + 12)); |
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pand_r2r(r1, r3); |
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psrlq_i2r(48, r5); |
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pand_r2r(r2, r1); |
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movq_m2r(*(input_data + 52), r6); |
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por_r2r(r3, r5); |
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pmullw_m2r(*(input_data + 52), r6); |
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psrlq_i2r(16, r0); |
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movq_r2r(r4, r7); |
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movq_r2r(r2, r3); |
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psllq_i2r(48, r7); |
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pand_r2r(r0, r3); |
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pxor_r2r(r3, r0); |
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psllq_i2r(32, r3); |
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por_r2r(r5, r7); |
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movq_r2r(r6, r5); |
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pand_m2r(*M(1), r6); |
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por_r2r(r3, r7); |
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psllq_i2r(32, r6); |
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por_r2r(r1, r0); |
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movq_r2m(r7, *(output_data + 20)); |
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por_r2r(r6, r0); |
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movq_m2r(*(input_data + 60), r7); |
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movq_r2r(r5, r6); |
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pmullw_m2r(*(input_data + 60), r7); |
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psrlq_i2r(32, r5); |
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pand_r2r(r2, r6); |
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movq_r2r(r5, r1); |
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movq_r2m(r0, *(output_data + 28)); |
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pand_r2r(r2, r1); |
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movq_m2r(*(input_data + 56), r0); |
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movq_r2r(r7, r3); |
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pmullw_m2r(*(dequant_matrix + 56), r0); |
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psllq_i2r(16, r3); |
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pand_m2r(*M(3), r7); |
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pxor_r2r(r1, r5); |
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por_r2r(r5, r6); |
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movq_r2r(r3, r5); |
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pand_m2r(*M(3), r5); |
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por_r2r(r1, r7); |
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movq_m2r(*(input_data + 48), r1); |
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pxor_r2r(r5, r3); |
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pmullw_m2r(*(dequant_matrix + 48), r1); |
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por_r2r(r3, r7); |
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por_r2r(r5, r6); |
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movq_r2r(r0, r5); |
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movq_r2m(r7, *(output_data + 60)); |
|
|
|
psrlq_i2r(16, r5); |
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pand_m2r(*M(2), r5); |
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movq_r2r(r0, r7); |
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por_r2r(r5, r6); |
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pand_r2r(r2, r0); |
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pxor_r2r(r0, r7); |
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psllq_i2r(32, r0); |
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movq_r2m(r6, *(output_data + 52)); |
|
|
|
psrlq_i2r(16, r4); |
|
movq_m2r(*(input_data + 36), r5); |
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psllq_i2r(16, r7); |
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pmullw_m2r(*(dequant_matrix + 36), r5); |
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movq_r2r(r7, r6); |
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movq_m2r(*M(2), r3); |
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psllq_i2r(16, r6); |
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pand_m2r(*M(3), r7); |
|
pand_r2r(r1, r3); |
|
por_r2r(r0, r7); |
|
movq_r2r(r1, r0); |
|
pand_m2r(*M(3), r1); |
|
por_r2r(r3, r6); |
|
movq_r2r(r4, r3); |
|
psrlq_i2r(32, r1); |
|
pand_r2r(r2, r3); |
|
por_r2r(r1, r7); |
|
por_r2r(r3, r7); |
|
movq_r2r(r4, r3); |
|
pand_m2r(*M(1), r3); |
|
movq_r2r(r5, r1); |
|
movq_r2m(r7, *(output_data + 44)); |
|
|
|
psrlq_i2r(48, r5); |
|
movq_m2r(*(input_data + 32), r7); |
|
por_r2r(r3, r6); |
|
pmullw_m2r(*(dequant_matrix + 32), r7); |
|
por_r2r(r5, r6); |
|
pand_m2r(*M(2), r4); |
|
psllq_i2r(32, r0); |
|
movq_r2m(r6, *(output_data + 36)); |
|
|
|
movq_r2r(r0, r6); |
|
pand_m2r(*M(3), r0); |
|
psllq_i2r(16, r6); |
|
movq_m2r(*(input_data + 20), r5); |
|
movq_r2r(r1, r3); |
|
pmullw_m2r(*(dequant_matrix + 40), r5); |
|
psrlq_i2r(16, r1); |
|
pand_m2r(*M(1), r1); |
|
por_r2r(r4, r0); |
|
pand_r2r(r7, r2); |
|
por_r2r(r1, r0); |
|
por_r2r(r2, r0); |
|
psllq_i2r(16, r3); |
|
movq_r2r(r3, r4); |
|
movq_r2r(r5, r2); |
|
movq_r2m(r0, *(output_data + 56)); |
|
|
|
psrlq_i2r(48, r2); |
|
pand_m2r(*M(2), r4); |
|
por_r2r(r2, r6); |
|
movq_m2r(*M(1), r2); |
|
por_r2r(r4, r6); |
|
pand_r2r(r7, r2); |
|
psllq_i2r(32, r3); |
|
por_m2r(*(output_data + 40), r3); |
|
|
|
por_r2r(r2, r6); |
|
movq_m2r(*M(3), r2); |
|
psllq_i2r(16, r5); |
|
movq_r2m(r6, *(output_data + 48)); |
|
|
|
pand_r2r(r5, r2); |
|
movq_m2r(*M(2), r6); |
|
pxor_r2r(r2, r5); |
|
pand_r2r(r7, r6); |
|
psrlq_i2r(32, r2); |
|
pand_m2r(*M(3), r7); |
|
por_r2r(r2, r3); |
|
por_m2r(*(output_data + 32), r7); |
|
|
|
por_r2r(r3, r6); |
|
por_r2r(r5, r7); |
|
movq_r2m(r6, *(output_data + 40)); |
|
movq_r2m(r7, *(output_data + 32)); |
|
|
|
|
|
#undef M |
|
|
|
/* at this point, function has completed dequantization + dezigzag + |
|
* partial transposition; now do the idct itself */ |
|
|
|
#define I(K) (output_data + K * 8) |
|
#define J(K) (output_data + ((K - 4) * 8) + 4) |
|
|
|
RowIDCT(); |
|
Transpose(); |
|
|
|
#undef I |
|
#undef J |
|
#define I(K) (output_data + (K * 8) + 32) |
|
#define J(K) (output_data + ((K - 4) * 8) + 36) |
|
|
|
RowIDCT(); |
|
Transpose(); |
|
|
|
#undef I |
|
#undef J |
|
#define I(K) (output_data + K * 8) |
|
#define J(K) (output_data + K * 8) |
|
|
|
ColumnIDCT(); |
|
|
|
#undef I |
|
#undef J |
|
#define I(K) (output_data + (K * 8) + 4) |
|
#define J(K) (output_data + (K * 8) + 4) |
|
|
|
ColumnIDCT(); |
|
|
|
#undef I |
|
#undef J |
|
|
|
} |
|
|
|
void vp3_idct_put_mmx(int16_t *input_data, int16_t *dequant_matrix, |
|
int coeff_count, uint8_t *dest, int stride) |
|
{ |
|
int16_t transformed_data[64]; |
|
int16_t *op; |
|
int i, j; |
|
uint8_t vector128[8] = { 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80 }; |
|
|
|
vp3_idct_mmx(input_data, dequant_matrix, transformed_data); |
|
|
|
/* place in final output */ |
|
op = transformed_data; |
|
movq_m2r(*vector128, mm0); |
|
for (i = 0; i < 8; i++) { |
|
#if 1 |
|
for (j = 0; j < 8; j++) { |
|
if (*op < -128) |
|
*dest = 0; |
|
else if (*op > 127) |
|
*dest = 255; |
|
else |
|
*dest = (uint8_t)(*op + 128); |
|
op++; |
|
dest++; |
|
} |
|
dest += (stride - 8); |
|
#else |
|
/* prototype optimization */ |
|
pxor_r2r(mm1, mm1); |
|
packsswb_m2r(*(op + 4), mm1); |
|
movq_r2r(mm1, mm2); |
|
psrlq_i2r(32, mm2); |
|
packsswb_m2r(*(op + 0), mm1); |
|
op += 8; |
|
por_r2r(mm2, mm1); |
|
paddb_r2r(mm0, mm1); |
|
movq_r2m(mm1, *dest); |
|
dest += stride; |
|
#endif |
|
} |
|
|
|
/* be a good MMX citizen */ |
|
emms(); |
|
} |
|
|
|
void vp3_idct_add_mmx(int16_t *input_data, int16_t *dequant_matrix, |
|
int coeff_count, uint8_t *dest, int stride) |
|
{ |
|
int16_t transformed_data[64]; |
|
int16_t *op; |
|
int i, j; |
|
int16_t sample; |
|
|
|
vp3_idct_mmx(input_data, dequant_matrix, transformed_data); |
|
|
|
/* place in final output */ |
|
op = transformed_data; |
|
for (i = 0; i < 8; i++) { |
|
for (j = 0; j < 8; j++) { |
|
sample = *dest + *op; |
|
if (sample < 0) |
|
*dest = 0; |
|
else if (sample > 255) |
|
*dest = 255; |
|
else |
|
*dest = (uint8_t)(sample & 0xFF); |
|
op++; |
|
dest++; |
|
} |
|
dest += (stride - 8); |
|
} |
|
|
|
/* be a good MMX citizen */ |
|
emms(); |
|
}
|
|
|