mpegvideo_iwmmxt.c
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1 /*
2  * copyright (c) 2004 AGAWA Koji
3  *
4  * This file is part of Libav.
5  *
6  * Libav is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * Libav is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with Libav; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include "libavutil/cpu.h"
22 #include "libavcodec/avcodec.h"
23 #include "libavcodec/dsputil.h"
24 #include "libavcodec/mpegvideo.h"
25 #include "mpegvideo_arm.h"
26 
28  DCTELEM *block, int n, int qscale)
29 {
30  int level, qmul, qadd;
31  int nCoeffs;
32  DCTELEM *block_orig = block;
33 
34  assert(s->block_last_index[n]>=0);
35 
36  qmul = qscale << 1;
37 
38  if (!s->h263_aic) {
39  if (n < 4)
40  level = block[0] * s->y_dc_scale;
41  else
42  level = block[0] * s->c_dc_scale;
43  qadd = (qscale - 1) | 1;
44  }else{
45  qadd = 0;
46  level = block[0];
47  }
48  if(s->ac_pred)
49  nCoeffs=63;
50  else
51  nCoeffs= s->inter_scantable.raster_end[ s->block_last_index[n] ];
52 
53  __asm__ volatile (
54 /* "movd %1, %%mm6 \n\t" //qmul */
55 /* "packssdw %%mm6, %%mm6 \n\t" */
56 /* "packssdw %%mm6, %%mm6 \n\t" */
57  "tbcsth wr6, %[qmul] \n\t"
58 /* "movd %2, %%mm5 \n\t" //qadd */
59 /* "packssdw %%mm5, %%mm5 \n\t" */
60 /* "packssdw %%mm5, %%mm5 \n\t" */
61  "tbcsth wr5, %[qadd] \n\t"
62  "wzero wr7 \n\t" /* "pxor %%mm7, %%mm7 \n\t" */
63  "wzero wr4 \n\t" /* "pxor %%mm4, %%mm4 \n\t" */
64  "wsubh wr7, wr5, wr7 \n\t" /* "psubw %%mm5, %%mm7 \n\t" */
65  "1: \n\t"
66  "wldrd wr2, [%[block]] \n\t" /* "movq (%0, %3), %%mm0 \n\t" */
67  "wldrd wr3, [%[block], #8] \n\t" /* "movq 8(%0, %3), %%mm1 \n\t" */
68  "wmulsl wr0, wr6, wr2 \n\t" /* "pmullw %%mm6, %%mm0 \n\t" */
69  "wmulsl wr1, wr6, wr3 \n\t" /* "pmullw %%mm6, %%mm1 \n\t" */
70 /* "movq (%0, %3), %%mm2 \n\t" */
71 /* "movq 8(%0, %3), %%mm3 \n\t" */
72  "wcmpgtsh wr2, wr4, wr2 \n\t" /* "pcmpgtw %%mm4, %%mm2 \n\t" // block[i] < 0 ? -1 : 0 */
73  "wcmpgtsh wr3, wr4, wr2 \n\t" /* "pcmpgtw %%mm4, %%mm3 \n\t" // block[i] < 0 ? -1 : 0 */
74  "wxor wr0, wr2, wr0 \n\t" /* "pxor %%mm2, %%mm0 \n\t" */
75  "wxor wr1, wr3, wr1 \n\t" /* "pxor %%mm3, %%mm1 \n\t" */
76  "waddh wr0, wr7, wr0 \n\t" /* "paddw %%mm7, %%mm0 \n\t" */
77  "waddh wr1, wr7, wr1 \n\t" /* "paddw %%mm7, %%mm1 \n\t" */
78  "wxor wr2, wr0, wr2 \n\t" /* "pxor %%mm0, %%mm2 \n\t" */
79  "wxor wr3, wr1, wr3 \n\t" /* "pxor %%mm1, %%mm3 \n\t" */
80  "wcmpeqh wr0, wr7, wr0 \n\t" /* "pcmpeqw %%mm7, %%mm0 \n\t" // block[i] == 0 ? -1 : 0 */
81  "wcmpeqh wr1, wr7, wr1 \n\t" /* "pcmpeqw %%mm7, %%mm1 \n\t" // block[i] == 0 ? -1 : 0 */
82  "wandn wr0, wr2, wr0 \n\t" /* "pandn %%mm2, %%mm0 \n\t" */
83  "wandn wr1, wr3, wr1 \n\t" /* "pandn %%mm3, %%mm1 \n\t" */
84  "wstrd wr0, [%[block]] \n\t" /* "movq %%mm0, (%0, %3) \n\t" */
85  "wstrd wr1, [%[block], #8] \n\t" /* "movq %%mm1, 8(%0, %3) \n\t" */
86  "add %[block], %[block], #16 \n\t" /* "addl $16, %3 \n\t" */
87  "subs %[i], %[i], #1 \n\t"
88  "bne 1b \n\t" /* "jng 1b \n\t" */
89  :[block]"+r"(block)
90  :[i]"r"((nCoeffs + 8) / 8), [qmul]"r"(qmul), [qadd]"r"(qadd)
91  :"memory");
92 
93  block_orig[0] = level;
94 }
95 
97 {
98  if (!(mm_flags & AV_CPU_FLAG_IWMMXT)) return;
99 
101 }