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mpegvideo.c
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1 /*
2  * Optimized for ia32 CPUs by Nick Kurshev <nickols_k@mail.ru>
3  * h263, mpeg1, mpeg2 dequantizer & draw_edges by Michael Niedermayer <michaelni@gmx.at>
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "libavutil/attributes.h"
23 #include "libavutil/cpu.h"
24 #include "libavutil/x86/asm.h"
25 #include "libavutil/x86/cpu.h"
26 #include "libavcodec/avcodec.h"
27 #include "libavcodec/mpegvideo.h"
28 #include "dsputil_x86.h"
29 
30 #if HAVE_MMX_INLINE
31 
32 static void dct_unquantize_h263_intra_mmx(MpegEncContext *s,
33  int16_t *block, int n, int qscale)
34 {
35  x86_reg level, qmul, qadd, nCoeffs;
36 
37  qmul = qscale << 1;
38 
39  av_assert2(s->block_last_index[n]>=0 || s->h263_aic);
40 
41  if (!s->h263_aic) {
42  if (n < 4)
43  level = block[0] * s->y_dc_scale;
44  else
45  level = block[0] * s->c_dc_scale;
46  qadd = (qscale - 1) | 1;
47  }else{
48  qadd = 0;
49  level= block[0];
50  }
51  if(s->ac_pred)
52  nCoeffs=63;
53  else
54  nCoeffs= s->inter_scantable.raster_end[ s->block_last_index[n] ];
55 
56 __asm__ volatile(
57  "movd %1, %%mm6 \n\t" //qmul
58  "packssdw %%mm6, %%mm6 \n\t"
59  "packssdw %%mm6, %%mm6 \n\t"
60  "movd %2, %%mm5 \n\t" //qadd
61  "pxor %%mm7, %%mm7 \n\t"
62  "packssdw %%mm5, %%mm5 \n\t"
63  "packssdw %%mm5, %%mm5 \n\t"
64  "psubw %%mm5, %%mm7 \n\t"
65  "pxor %%mm4, %%mm4 \n\t"
66  ".p2align 4 \n\t"
67  "1: \n\t"
68  "movq (%0, %3), %%mm0 \n\t"
69  "movq 8(%0, %3), %%mm1 \n\t"
70 
71  "pmullw %%mm6, %%mm0 \n\t"
72  "pmullw %%mm6, %%mm1 \n\t"
73 
74  "movq (%0, %3), %%mm2 \n\t"
75  "movq 8(%0, %3), %%mm3 \n\t"
76 
77  "pcmpgtw %%mm4, %%mm2 \n\t" // block[i] < 0 ? -1 : 0
78  "pcmpgtw %%mm4, %%mm3 \n\t" // block[i] < 0 ? -1 : 0
79 
80  "pxor %%mm2, %%mm0 \n\t"
81  "pxor %%mm3, %%mm1 \n\t"
82 
83  "paddw %%mm7, %%mm0 \n\t"
84  "paddw %%mm7, %%mm1 \n\t"
85 
86  "pxor %%mm0, %%mm2 \n\t"
87  "pxor %%mm1, %%mm3 \n\t"
88 
89  "pcmpeqw %%mm7, %%mm0 \n\t" // block[i] == 0 ? -1 : 0
90  "pcmpeqw %%mm7, %%mm1 \n\t" // block[i] == 0 ? -1 : 0
91 
92  "pandn %%mm2, %%mm0 \n\t"
93  "pandn %%mm3, %%mm1 \n\t"
94 
95  "movq %%mm0, (%0, %3) \n\t"
96  "movq %%mm1, 8(%0, %3) \n\t"
97 
98  "add $16, %3 \n\t"
99  "jng 1b \n\t"
100  ::"r" (block+nCoeffs), "rm"(qmul), "rm" (qadd), "r" (2*(-nCoeffs))
101  : "memory"
102  );
103  block[0]= level;
104 }
105 
106 
107 static void dct_unquantize_h263_inter_mmx(MpegEncContext *s,
108  int16_t *block, int n, int qscale)
109 {
110  x86_reg qmul, qadd, nCoeffs;
111 
112  qmul = qscale << 1;
113  qadd = (qscale - 1) | 1;
114 
115  av_assert2(s->block_last_index[n]>=0 || s->h263_aic);
116 
117  nCoeffs= s->inter_scantable.raster_end[ s->block_last_index[n] ];
118 
119 __asm__ volatile(
120  "movd %1, %%mm6 \n\t" //qmul
121  "packssdw %%mm6, %%mm6 \n\t"
122  "packssdw %%mm6, %%mm6 \n\t"
123  "movd %2, %%mm5 \n\t" //qadd
124  "pxor %%mm7, %%mm7 \n\t"
125  "packssdw %%mm5, %%mm5 \n\t"
126  "packssdw %%mm5, %%mm5 \n\t"
127  "psubw %%mm5, %%mm7 \n\t"
128  "pxor %%mm4, %%mm4 \n\t"
129  ".p2align 4 \n\t"
130  "1: \n\t"
131  "movq (%0, %3), %%mm0 \n\t"
132  "movq 8(%0, %3), %%mm1 \n\t"
133 
134  "pmullw %%mm6, %%mm0 \n\t"
135  "pmullw %%mm6, %%mm1 \n\t"
136 
137  "movq (%0, %3), %%mm2 \n\t"
138  "movq 8(%0, %3), %%mm3 \n\t"
139 
140  "pcmpgtw %%mm4, %%mm2 \n\t" // block[i] < 0 ? -1 : 0
141  "pcmpgtw %%mm4, %%mm3 \n\t" // block[i] < 0 ? -1 : 0
142 
143  "pxor %%mm2, %%mm0 \n\t"
144  "pxor %%mm3, %%mm1 \n\t"
145 
146  "paddw %%mm7, %%mm0 \n\t"
147  "paddw %%mm7, %%mm1 \n\t"
148 
149  "pxor %%mm0, %%mm2 \n\t"
150  "pxor %%mm1, %%mm3 \n\t"
151 
152  "pcmpeqw %%mm7, %%mm0 \n\t" // block[i] == 0 ? -1 : 0
153  "pcmpeqw %%mm7, %%mm1 \n\t" // block[i] == 0 ? -1 : 0
154 
155  "pandn %%mm2, %%mm0 \n\t"
156  "pandn %%mm3, %%mm1 \n\t"
157 
158  "movq %%mm0, (%0, %3) \n\t"
159  "movq %%mm1, 8(%0, %3) \n\t"
160 
161  "add $16, %3 \n\t"
162  "jng 1b \n\t"
163  ::"r" (block+nCoeffs), "rm"(qmul), "rm" (qadd), "r" (2*(-nCoeffs))
164  : "memory"
165  );
166 }
167 
168 static void dct_unquantize_mpeg1_intra_mmx(MpegEncContext *s,
169  int16_t *block, int n, int qscale)
170 {
171  x86_reg nCoeffs;
172  const uint16_t *quant_matrix;
173  int block0;
174 
175  av_assert2(s->block_last_index[n]>=0);
176 
177  nCoeffs= s->intra_scantable.raster_end[ s->block_last_index[n] ]+1;
178 
179  if (n < 4)
180  block0 = block[0] * s->y_dc_scale;
181  else
182  block0 = block[0] * s->c_dc_scale;
183  /* XXX: only mpeg1 */
184  quant_matrix = s->intra_matrix;
185 __asm__ volatile(
186  "pcmpeqw %%mm7, %%mm7 \n\t"
187  "psrlw $15, %%mm7 \n\t"
188  "movd %2, %%mm6 \n\t"
189  "packssdw %%mm6, %%mm6 \n\t"
190  "packssdw %%mm6, %%mm6 \n\t"
191  "mov %3, %%"REG_a" \n\t"
192  ".p2align 4 \n\t"
193  "1: \n\t"
194  "movq (%0, %%"REG_a"), %%mm0 \n\t"
195  "movq 8(%0, %%"REG_a"), %%mm1 \n\t"
196  "movq (%1, %%"REG_a"), %%mm4 \n\t"
197  "movq 8(%1, %%"REG_a"), %%mm5 \n\t"
198  "pmullw %%mm6, %%mm4 \n\t" // q=qscale*quant_matrix[i]
199  "pmullw %%mm6, %%mm5 \n\t" // q=qscale*quant_matrix[i]
200  "pxor %%mm2, %%mm2 \n\t"
201  "pxor %%mm3, %%mm3 \n\t"
202  "pcmpgtw %%mm0, %%mm2 \n\t" // block[i] < 0 ? -1 : 0
203  "pcmpgtw %%mm1, %%mm3 \n\t" // block[i] < 0 ? -1 : 0
204  "pxor %%mm2, %%mm0 \n\t"
205  "pxor %%mm3, %%mm1 \n\t"
206  "psubw %%mm2, %%mm0 \n\t" // abs(block[i])
207  "psubw %%mm3, %%mm1 \n\t" // abs(block[i])
208  "pmullw %%mm4, %%mm0 \n\t" // abs(block[i])*q
209  "pmullw %%mm5, %%mm1 \n\t" // abs(block[i])*q
210  "pxor %%mm4, %%mm4 \n\t"
211  "pxor %%mm5, %%mm5 \n\t" // FIXME slow
212  "pcmpeqw (%0, %%"REG_a"), %%mm4 \n\t" // block[i] == 0 ? -1 : 0
213  "pcmpeqw 8(%0, %%"REG_a"), %%mm5\n\t" // block[i] == 0 ? -1 : 0
214  "psraw $3, %%mm0 \n\t"
215  "psraw $3, %%mm1 \n\t"
216  "psubw %%mm7, %%mm0 \n\t"
217  "psubw %%mm7, %%mm1 \n\t"
218  "por %%mm7, %%mm0 \n\t"
219  "por %%mm7, %%mm1 \n\t"
220  "pxor %%mm2, %%mm0 \n\t"
221  "pxor %%mm3, %%mm1 \n\t"
222  "psubw %%mm2, %%mm0 \n\t"
223  "psubw %%mm3, %%mm1 \n\t"
224  "pandn %%mm0, %%mm4 \n\t"
225  "pandn %%mm1, %%mm5 \n\t"
226  "movq %%mm4, (%0, %%"REG_a") \n\t"
227  "movq %%mm5, 8(%0, %%"REG_a") \n\t"
228 
229  "add $16, %%"REG_a" \n\t"
230  "js 1b \n\t"
231  ::"r" (block+nCoeffs), "r"(quant_matrix+nCoeffs), "rm" (qscale), "g" (-2*nCoeffs)
232  : "%"REG_a, "memory"
233  );
234  block[0]= block0;
235 }
236 
237 static void dct_unquantize_mpeg1_inter_mmx(MpegEncContext *s,
238  int16_t *block, int n, int qscale)
239 {
240  x86_reg nCoeffs;
241  const uint16_t *quant_matrix;
242 
243  av_assert2(s->block_last_index[n]>=0);
244 
245  nCoeffs= s->intra_scantable.raster_end[ s->block_last_index[n] ]+1;
246 
247  quant_matrix = s->inter_matrix;
248 __asm__ volatile(
249  "pcmpeqw %%mm7, %%mm7 \n\t"
250  "psrlw $15, %%mm7 \n\t"
251  "movd %2, %%mm6 \n\t"
252  "packssdw %%mm6, %%mm6 \n\t"
253  "packssdw %%mm6, %%mm6 \n\t"
254  "mov %3, %%"REG_a" \n\t"
255  ".p2align 4 \n\t"
256  "1: \n\t"
257  "movq (%0, %%"REG_a"), %%mm0 \n\t"
258  "movq 8(%0, %%"REG_a"), %%mm1 \n\t"
259  "movq (%1, %%"REG_a"), %%mm4 \n\t"
260  "movq 8(%1, %%"REG_a"), %%mm5 \n\t"
261  "pmullw %%mm6, %%mm4 \n\t" // q=qscale*quant_matrix[i]
262  "pmullw %%mm6, %%mm5 \n\t" // q=qscale*quant_matrix[i]
263  "pxor %%mm2, %%mm2 \n\t"
264  "pxor %%mm3, %%mm3 \n\t"
265  "pcmpgtw %%mm0, %%mm2 \n\t" // block[i] < 0 ? -1 : 0
266  "pcmpgtw %%mm1, %%mm3 \n\t" // block[i] < 0 ? -1 : 0
267  "pxor %%mm2, %%mm0 \n\t"
268  "pxor %%mm3, %%mm1 \n\t"
269  "psubw %%mm2, %%mm0 \n\t" // abs(block[i])
270  "psubw %%mm3, %%mm1 \n\t" // abs(block[i])
271  "paddw %%mm0, %%mm0 \n\t" // abs(block[i])*2
272  "paddw %%mm1, %%mm1 \n\t" // abs(block[i])*2
273  "paddw %%mm7, %%mm0 \n\t" // abs(block[i])*2 + 1
274  "paddw %%mm7, %%mm1 \n\t" // abs(block[i])*2 + 1
275  "pmullw %%mm4, %%mm0 \n\t" // (abs(block[i])*2 + 1)*q
276  "pmullw %%mm5, %%mm1 \n\t" // (abs(block[i])*2 + 1)*q
277  "pxor %%mm4, %%mm4 \n\t"
278  "pxor %%mm5, %%mm5 \n\t" // FIXME slow
279  "pcmpeqw (%0, %%"REG_a"), %%mm4 \n\t" // block[i] == 0 ? -1 : 0
280  "pcmpeqw 8(%0, %%"REG_a"), %%mm5\n\t" // block[i] == 0 ? -1 : 0
281  "psraw $4, %%mm0 \n\t"
282  "psraw $4, %%mm1 \n\t"
283  "psubw %%mm7, %%mm0 \n\t"
284  "psubw %%mm7, %%mm1 \n\t"
285  "por %%mm7, %%mm0 \n\t"
286  "por %%mm7, %%mm1 \n\t"
287  "pxor %%mm2, %%mm0 \n\t"
288  "pxor %%mm3, %%mm1 \n\t"
289  "psubw %%mm2, %%mm0 \n\t"
290  "psubw %%mm3, %%mm1 \n\t"
291  "pandn %%mm0, %%mm4 \n\t"
292  "pandn %%mm1, %%mm5 \n\t"
293  "movq %%mm4, (%0, %%"REG_a") \n\t"
294  "movq %%mm5, 8(%0, %%"REG_a") \n\t"
295 
296  "add $16, %%"REG_a" \n\t"
297  "js 1b \n\t"
298  ::"r" (block+nCoeffs), "r"(quant_matrix+nCoeffs), "rm" (qscale), "g" (-2*nCoeffs)
299  : "%"REG_a, "memory"
300  );
301 }
302 
303 static void dct_unquantize_mpeg2_intra_mmx(MpegEncContext *s,
304  int16_t *block, int n, int qscale)
305 {
306  x86_reg nCoeffs;
307  const uint16_t *quant_matrix;
308  int block0;
309 
310  av_assert2(s->block_last_index[n]>=0);
311 
312  if(s->alternate_scan) nCoeffs= 63; //FIXME
313  else nCoeffs= s->intra_scantable.raster_end[ s->block_last_index[n] ];
314 
315  if (n < 4)
316  block0 = block[0] * s->y_dc_scale;
317  else
318  block0 = block[0] * s->c_dc_scale;
319  quant_matrix = s->intra_matrix;
320 __asm__ volatile(
321  "pcmpeqw %%mm7, %%mm7 \n\t"
322  "psrlw $15, %%mm7 \n\t"
323  "movd %2, %%mm6 \n\t"
324  "packssdw %%mm6, %%mm6 \n\t"
325  "packssdw %%mm6, %%mm6 \n\t"
326  "mov %3, %%"REG_a" \n\t"
327  ".p2align 4 \n\t"
328  "1: \n\t"
329  "movq (%0, %%"REG_a"), %%mm0 \n\t"
330  "movq 8(%0, %%"REG_a"), %%mm1 \n\t"
331  "movq (%1, %%"REG_a"), %%mm4 \n\t"
332  "movq 8(%1, %%"REG_a"), %%mm5 \n\t"
333  "pmullw %%mm6, %%mm4 \n\t" // q=qscale*quant_matrix[i]
334  "pmullw %%mm6, %%mm5 \n\t" // q=qscale*quant_matrix[i]
335  "pxor %%mm2, %%mm2 \n\t"
336  "pxor %%mm3, %%mm3 \n\t"
337  "pcmpgtw %%mm0, %%mm2 \n\t" // block[i] < 0 ? -1 : 0
338  "pcmpgtw %%mm1, %%mm3 \n\t" // block[i] < 0 ? -1 : 0
339  "pxor %%mm2, %%mm0 \n\t"
340  "pxor %%mm3, %%mm1 \n\t"
341  "psubw %%mm2, %%mm0 \n\t" // abs(block[i])
342  "psubw %%mm3, %%mm1 \n\t" // abs(block[i])
343  "pmullw %%mm4, %%mm0 \n\t" // abs(block[i])*q
344  "pmullw %%mm5, %%mm1 \n\t" // abs(block[i])*q
345  "pxor %%mm4, %%mm4 \n\t"
346  "pxor %%mm5, %%mm5 \n\t" // FIXME slow
347  "pcmpeqw (%0, %%"REG_a"), %%mm4 \n\t" // block[i] == 0 ? -1 : 0
348  "pcmpeqw 8(%0, %%"REG_a"), %%mm5\n\t" // block[i] == 0 ? -1 : 0
349  "psraw $3, %%mm0 \n\t"
350  "psraw $3, %%mm1 \n\t"
351  "pxor %%mm2, %%mm0 \n\t"
352  "pxor %%mm3, %%mm1 \n\t"
353  "psubw %%mm2, %%mm0 \n\t"
354  "psubw %%mm3, %%mm1 \n\t"
355  "pandn %%mm0, %%mm4 \n\t"
356  "pandn %%mm1, %%mm5 \n\t"
357  "movq %%mm4, (%0, %%"REG_a") \n\t"
358  "movq %%mm5, 8(%0, %%"REG_a") \n\t"
359 
360  "add $16, %%"REG_a" \n\t"
361  "jng 1b \n\t"
362  ::"r" (block+nCoeffs), "r"(quant_matrix+nCoeffs), "rm" (qscale), "g" (-2*nCoeffs)
363  : "%"REG_a, "memory"
364  );
365  block[0]= block0;
366  //Note, we do not do mismatch control for intra as errors cannot accumulate
367 }
368 
369 static void dct_unquantize_mpeg2_inter_mmx(MpegEncContext *s,
370  int16_t *block, int n, int qscale)
371 {
372  x86_reg nCoeffs;
373  const uint16_t *quant_matrix;
374 
375  av_assert2(s->block_last_index[n]>=0);
376 
377  if(s->alternate_scan) nCoeffs= 63; //FIXME
378  else nCoeffs= s->intra_scantable.raster_end[ s->block_last_index[n] ];
379 
380  quant_matrix = s->inter_matrix;
381 __asm__ volatile(
382  "pcmpeqw %%mm7, %%mm7 \n\t"
383  "psrlq $48, %%mm7 \n\t"
384  "movd %2, %%mm6 \n\t"
385  "packssdw %%mm6, %%mm6 \n\t"
386  "packssdw %%mm6, %%mm6 \n\t"
387  "mov %3, %%"REG_a" \n\t"
388  ".p2align 4 \n\t"
389  "1: \n\t"
390  "movq (%0, %%"REG_a"), %%mm0 \n\t"
391  "movq 8(%0, %%"REG_a"), %%mm1 \n\t"
392  "movq (%1, %%"REG_a"), %%mm4 \n\t"
393  "movq 8(%1, %%"REG_a"), %%mm5 \n\t"
394  "pmullw %%mm6, %%mm4 \n\t" // q=qscale*quant_matrix[i]
395  "pmullw %%mm6, %%mm5 \n\t" // q=qscale*quant_matrix[i]
396  "pxor %%mm2, %%mm2 \n\t"
397  "pxor %%mm3, %%mm3 \n\t"
398  "pcmpgtw %%mm0, %%mm2 \n\t" // block[i] < 0 ? -1 : 0
399  "pcmpgtw %%mm1, %%mm3 \n\t" // block[i] < 0 ? -1 : 0
400  "pxor %%mm2, %%mm0 \n\t"
401  "pxor %%mm3, %%mm1 \n\t"
402  "psubw %%mm2, %%mm0 \n\t" // abs(block[i])
403  "psubw %%mm3, %%mm1 \n\t" // abs(block[i])
404  "paddw %%mm0, %%mm0 \n\t" // abs(block[i])*2
405  "paddw %%mm1, %%mm1 \n\t" // abs(block[i])*2
406  "pmullw %%mm4, %%mm0 \n\t" // abs(block[i])*2*q
407  "pmullw %%mm5, %%mm1 \n\t" // abs(block[i])*2*q
408  "paddw %%mm4, %%mm0 \n\t" // (abs(block[i])*2 + 1)*q
409  "paddw %%mm5, %%mm1 \n\t" // (abs(block[i])*2 + 1)*q
410  "pxor %%mm4, %%mm4 \n\t"
411  "pxor %%mm5, %%mm5 \n\t" // FIXME slow
412  "pcmpeqw (%0, %%"REG_a"), %%mm4 \n\t" // block[i] == 0 ? -1 : 0
413  "pcmpeqw 8(%0, %%"REG_a"), %%mm5\n\t" // block[i] == 0 ? -1 : 0
414  "psrlw $4, %%mm0 \n\t"
415  "psrlw $4, %%mm1 \n\t"
416  "pxor %%mm2, %%mm0 \n\t"
417  "pxor %%mm3, %%mm1 \n\t"
418  "psubw %%mm2, %%mm0 \n\t"
419  "psubw %%mm3, %%mm1 \n\t"
420  "pandn %%mm0, %%mm4 \n\t"
421  "pandn %%mm1, %%mm5 \n\t"
422  "pxor %%mm4, %%mm7 \n\t"
423  "pxor %%mm5, %%mm7 \n\t"
424  "movq %%mm4, (%0, %%"REG_a") \n\t"
425  "movq %%mm5, 8(%0, %%"REG_a") \n\t"
426 
427  "add $16, %%"REG_a" \n\t"
428  "jng 1b \n\t"
429  "movd 124(%0, %3), %%mm0 \n\t"
430  "movq %%mm7, %%mm6 \n\t"
431  "psrlq $32, %%mm7 \n\t"
432  "pxor %%mm6, %%mm7 \n\t"
433  "movq %%mm7, %%mm6 \n\t"
434  "psrlq $16, %%mm7 \n\t"
435  "pxor %%mm6, %%mm7 \n\t"
436  "pslld $31, %%mm7 \n\t"
437  "psrlq $15, %%mm7 \n\t"
438  "pxor %%mm7, %%mm0 \n\t"
439  "movd %%mm0, 124(%0, %3) \n\t"
440 
441  ::"r" (block+nCoeffs), "r"(quant_matrix+nCoeffs), "rm" (qscale), "r" (-2*nCoeffs)
442  : "%"REG_a, "memory"
443  );
444 }
445 
446 #endif /* HAVE_MMX_INLINE */
447 
448 av_cold void ff_MPV_common_init_x86(MpegEncContext *s)
449 {
450 #if HAVE_MMX_INLINE
451  int cpu_flags = av_get_cpu_flags();
452 
453  if (INLINE_MMX(cpu_flags)) {
454  s->dct_unquantize_h263_intra = dct_unquantize_h263_intra_mmx;
455  s->dct_unquantize_h263_inter = dct_unquantize_h263_inter_mmx;
456  s->dct_unquantize_mpeg1_intra = dct_unquantize_mpeg1_intra_mmx;
457  s->dct_unquantize_mpeg1_inter = dct_unquantize_mpeg1_inter_mmx;
458  if(!(s->flags & CODEC_FLAG_BITEXACT))
459  s->dct_unquantize_mpeg2_intra = dct_unquantize_mpeg2_intra_mmx;
460  s->dct_unquantize_mpeg2_inter = dct_unquantize_mpeg2_inter_mmx;
461  }
462 #endif /* HAVE_MMX_INLINE */
463 }
Generated on Sun Mar 23 2014 23:50:00 for FFmpeg by   doxygen 1.8.2