1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
|
/*
* Loongson MMI optimizations for libjpeg-turbo
*
* Copyright (C) 2014-2015, 2018-2019, D. R. Commander. All Rights Reserved.
* Copyright (C) 2016-2018, Loongson Technology Corporation Limited, BeiJing.
* All Rights Reserved.
* Authors: LiuQingfa <liuqingfa-hf@loongson.cn>
*
* Based on the x86 SIMD extension for IJG JPEG library
* Copyright (C) 1999-2006, MIYASAKA Masaru.
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/
/* FAST INTEGER INVERSE DCT */
#include "jsimd_mmi.h"
#define CONST_BITS 8
#define PASS1_BITS 2
#define FIX_1_082 ((short)277) /* FIX(1.082392200) */
#define FIX_1_414 ((short)362) /* FIX(1.414213562) */
#define FIX_1_847 ((short)473) /* FIX(1.847759065) */
#define FIX_2_613 ((short)669) /* FIX(2.613125930) */
#define FIX_1_613 ((short)(FIX_2_613 - 256 * 3)) /* FIX(2.613125930) - FIX(1) */
#define PRE_MULTIPLY_SCALE_BITS 2
#define CONST_SHIFT (16 - PRE_MULTIPLY_SCALE_BITS - CONST_BITS)
enum const_index {
index_PW_F1082,
index_PW_F1414,
index_PW_F1847,
index_PW_MF1613,
index_PB_CENTERJSAMP
};
static uint64_t const_value[] = {
_uint64_set1_pi16(FIX_1_082 << CONST_SHIFT),
_uint64_set1_pi16(FIX_1_414 << CONST_SHIFT),
_uint64_set1_pi16(FIX_1_847 << CONST_SHIFT),
_uint64_set1_pi16(-FIX_1_613 << CONST_SHIFT),
_uint64_set1_pi8(CENTERJSAMPLE)
};
#define PW_F1414 get_const_value(index_PW_F1414)
#define PW_F1847 get_const_value(index_PW_F1847)
#define PW_MF1613 get_const_value(index_PW_MF1613)
#define PW_F1082 get_const_value(index_PW_F1082)
#define PB_CENTERJSAMP get_const_value(index_PB_CENTERJSAMP)
#define test_m32_zero(mm32) (!(*(uint32_t *)&mm32))
#define test_m64_zero(mm64) (!(*(uint64_t *)&mm64))
#define DO_IDCT_COMMON() { \
tmp7 = _mm_add_pi16(z11, z13); \
\
tmp11 = _mm_sub_pi16(z11, z13); \
tmp11 = _mm_slli_pi16(tmp11, PRE_MULTIPLY_SCALE_BITS); \
tmp11 = _mm_mulhi_pi16(tmp11, PW_F1414); \
\
tmp10 = _mm_slli_pi16(z12, PRE_MULTIPLY_SCALE_BITS); \
tmp12 = _mm_slli_pi16(z10, PRE_MULTIPLY_SCALE_BITS); \
\
/* To avoid overflow... \
* \
* (Original) \
* tmp12 = -2.613125930 * z10 + z5; \
* \
* (This implementation) \
* tmp12 = (-1.613125930 - 1) * z10 + z5; \
* = -1.613125930 * z10 - z10 + z5; \
*/ \
\
z5 = _mm_add_pi16(tmp10, tmp12); \
z5 = _mm_mulhi_pi16(z5, PW_F1847); \
\
tmp10 = _mm_mulhi_pi16(tmp10, PW_F1082); \
tmp10 = _mm_sub_pi16(tmp10, z5); \
tmp12 = _mm_mulhi_pi16(tmp12, PW_MF1613); \
tmp12 = _mm_sub_pi16(tmp12, z10); \
tmp12 = _mm_sub_pi16(tmp12, z10); \
tmp12 = _mm_sub_pi16(tmp12, z10); \
tmp12 = _mm_add_pi16(tmp12, z5); \
\
/* Final output stage */ \
\
tmp6 = _mm_sub_pi16(tmp12, tmp7); \
tmp5 = _mm_sub_pi16(tmp11, tmp6); \
tmp4 = _mm_add_pi16(tmp10, tmp5); \
\
out0 = _mm_add_pi16(tmp0, tmp7); \
out7 = _mm_sub_pi16(tmp0, tmp7); \
out1 = _mm_add_pi16(tmp1, tmp6); \
out6 = _mm_sub_pi16(tmp1, tmp6); \
\
out2 = _mm_add_pi16(tmp2, tmp5); \
out5 = _mm_sub_pi16(tmp2, tmp5); \
out4 = _mm_add_pi16(tmp3, tmp4); \
out3 = _mm_sub_pi16(tmp3, tmp4); \
}
#define DO_IDCT_PASS1(iter) { \
__m64 col0l, col1l, col2l, col3l, col4l, col5l, col6l, col7l; \
__m64 quant0l, quant1l, quant2l, quant3l; \
__m64 quant4l, quant5l, quant6l, quant7l; \
__m64 row01a, row01b, row01c, row01d, row23a, row23b, row23c, row23d; \
__m64 row0l, row0h, row1l, row1h, row2l, row2h, row3l, row3h; \
__m32 col0a, col1a, mm0; \
\
col0a = _mm_load_si32((__m32 *)&inptr[DCTSIZE * 1]); \
col1a = _mm_load_si32((__m32 *)&inptr[DCTSIZE * 2]); \
mm0 = _mm_or_si32(col0a, col1a); \
\
if (test_m32_zero(mm0)) { \
__m64 mm1, mm2; \
\
col0l = _mm_load_si64((__m64 *)&inptr[DCTSIZE * 0]); \
col1l = _mm_load_si64((__m64 *)&inptr[DCTSIZE * 1]); \
col2l = _mm_load_si64((__m64 *)&inptr[DCTSIZE * 2]); \
col3l = _mm_load_si64((__m64 *)&inptr[DCTSIZE * 3]); \
col4l = _mm_load_si64((__m64 *)&inptr[DCTSIZE * 4]); \
col5l = _mm_load_si64((__m64 *)&inptr[DCTSIZE * 5]); \
col6l = _mm_load_si64((__m64 *)&inptr[DCTSIZE * 6]); \
col7l = _mm_load_si64((__m64 *)&inptr[DCTSIZE * 7]); \
\
mm1 = _mm_or_si64(col1l, col3l); \
mm2 = _mm_or_si64(col2l, col4l); \
mm1 = _mm_or_si64(mm1, col5l); \
mm2 = _mm_or_si64(mm2, col6l); \
mm1 = _mm_or_si64(mm1, col7l); \
mm1 = _mm_or_si64(mm1, mm2); \
\
if (test_m64_zero(mm1)) { \
__m64 dcval, dcvall, dcvalh, row0, row1, row2, row3; \
\
/* AC terms all zero */ \
\
quant0l = _mm_load_si64((__m64 *)&quantptr[DCTSIZE * 0]); \
\
dcval = _mm_mullo_pi16(col0l, quant0l); /* dcval=(00 10 20 30) */ \
\
dcvall = _mm_unpacklo_pi16(dcval, dcval); /* dcvall=(00 00 10 10) */ \
dcvalh = _mm_unpackhi_pi16(dcval, dcval); /* dcvalh=(20 20 30 30) */ \
\
row0 = _mm_unpacklo_pi32(dcvall, dcvall); /* row0=(00 00 00 00) */ \
row1 = _mm_unpackhi_pi32(dcvall, dcvall); /* row1=(10 10 10 10) */ \
row2 = _mm_unpacklo_pi32(dcvalh, dcvalh); /* row2=(20 20 20 20) */ \
row3 = _mm_unpackhi_pi32(dcvalh, dcvalh); /* row3=(30 30 30 30) */ \
\
_mm_store_si64((__m64 *)&wsptr[DCTSIZE * 0], row0); \
_mm_store_si64((__m64 *)&wsptr[DCTSIZE * 0 + 4], row0); \
_mm_store_si64((__m64 *)&wsptr[DCTSIZE * 1], row1); \
_mm_store_si64((__m64 *)&wsptr[DCTSIZE * 1 + 4], row1); \
_mm_store_si64((__m64 *)&wsptr[DCTSIZE * 2], row2); \
_mm_store_si64((__m64 *)&wsptr[DCTSIZE * 2 + 4], row2); \
_mm_store_si64((__m64 *)&wsptr[DCTSIZE * 3], row3); \
_mm_store_si64((__m64 *)&wsptr[DCTSIZE * 3 + 4], row3); \
\
goto nextcolumn##iter; \
} \
} \
\
/* Even part */ \
\
col0l = _mm_load_si64((__m64 *)&inptr[DCTSIZE * 0]); /* (00 10 20 30) */ \
col2l = _mm_load_si64((__m64 *)&inptr[DCTSIZE * 2]); /* (02 12 22 32) */ \
col4l = _mm_load_si64((__m64 *)&inptr[DCTSIZE * 4]); /* (04 14 24 34) */ \
col6l = _mm_load_si64((__m64 *)&inptr[DCTSIZE * 6]); /* (06 16 26 36) */ \
\
quant0l = _mm_load_si64((__m64 *)&quantptr[DCTSIZE * 0]); \
quant2l = _mm_load_si64((__m64 *)&quantptr[DCTSIZE * 2]); \
quant4l = _mm_load_si64((__m64 *)&quantptr[DCTSIZE * 4]); \
quant6l = _mm_load_si64((__m64 *)&quantptr[DCTSIZE * 6]); \
\
tmp0 = _mm_mullo_pi16(col0l, quant0l); \
tmp1 = _mm_mullo_pi16(col2l, quant2l); \
tmp2 = _mm_mullo_pi16(col4l, quant4l); \
tmp3 = _mm_mullo_pi16(col6l, quant6l); \
\
tmp10 = _mm_add_pi16(tmp0, tmp2); \
tmp11 = _mm_sub_pi16(tmp0, tmp2); \
tmp13 = _mm_add_pi16(tmp1, tmp3); \
\
tmp12 = _mm_sub_pi16(tmp1, tmp3); \
tmp12 = _mm_slli_pi16(tmp12, PRE_MULTIPLY_SCALE_BITS); \
tmp12 = _mm_mulhi_pi16(tmp12, PW_F1414); \
tmp12 = _mm_sub_pi16(tmp12, tmp13); \
\
tmp0 = _mm_add_pi16(tmp10, tmp13); \
tmp3 = _mm_sub_pi16(tmp10, tmp13); \
tmp1 = _mm_add_pi16(tmp11, tmp12); \
tmp2 = _mm_sub_pi16(tmp11, tmp12); \
\
/* Odd part */ \
\
col1l = _mm_load_si64((__m64 *)&inptr[DCTSIZE * 1]); /* (01 11 21 31) */ \
col3l = _mm_load_si64((__m64 *)&inptr[DCTSIZE * 3]); /* (03 13 23 33) */ \
col5l = _mm_load_si64((__m64 *)&inptr[DCTSIZE * 5]); /* (05 15 25 35) */ \
col7l = _mm_load_si64((__m64 *)&inptr[DCTSIZE * 7]); /* (07 17 27 37) */ \
\
quant1l = _mm_load_si64((__m64 *)&quantptr[DCTSIZE * 1]); \
quant3l = _mm_load_si64((__m64 *)&quantptr[DCTSIZE * 3]); \
quant5l = _mm_load_si64((__m64 *)&quantptr[DCTSIZE * 5]); \
quant7l = _mm_load_si64((__m64 *)&quantptr[DCTSIZE * 7]); \
\
tmp4 = _mm_mullo_pi16(col1l, quant1l); \
tmp5 = _mm_mullo_pi16(col3l, quant3l); \
tmp6 = _mm_mullo_pi16(col5l, quant5l); \
tmp7 = _mm_mullo_pi16(col7l, quant7l); \
\
z13 = _mm_add_pi16(tmp6, tmp5); \
z10 = _mm_sub_pi16(tmp6, tmp5); \
z11 = _mm_add_pi16(tmp4, tmp7); \
z12 = _mm_sub_pi16(tmp4, tmp7); \
\
DO_IDCT_COMMON() \
\
/* out0=(00 10 20 30), out1=(01 11 21 31) */ \
/* out2=(02 12 22 32), out3=(03 13 23 33) */ \
/* out4=(04 14 24 34), out5=(05 15 25 35) */ \
/* out6=(06 16 26 36), out7=(07 17 27 37) */ \
\
/* Transpose coefficients */ \
\
row01a = _mm_unpacklo_pi16(out0, out1); /* row01a=(00 01 10 11) */ \
row23a = _mm_unpackhi_pi16(out0, out1); /* row23a=(20 21 30 31) */ \
row01d = _mm_unpacklo_pi16(out6, out7); /* row01d=(06 07 16 17) */ \
row23d = _mm_unpackhi_pi16(out6, out7); /* row23d=(26 27 36 37) */ \
\
row01b = _mm_unpacklo_pi16(out2, out3); /* row01b=(02 03 12 13) */ \
row23b = _mm_unpackhi_pi16(out2, out3); /* row23b=(22 23 32 33) */ \
row01c = _mm_unpacklo_pi16(out4, out5); /* row01c=(04 05 14 15) */ \
row23c = _mm_unpackhi_pi16(out4, out5); /* row23c=(24 25 34 35) */ \
\
row0l = _mm_unpacklo_pi32(row01a, row01b); /* row0l=(00 01 02 03) */ \
row1l = _mm_unpackhi_pi32(row01a, row01b); /* row1l=(10 11 12 13) */ \
row2l = _mm_unpacklo_pi32(row23a, row23b); /* row2l=(20 21 22 23) */ \
row3l = _mm_unpackhi_pi32(row23a, row23b); /* row3l=(30 31 32 33) */ \
\
row0h = _mm_unpacklo_pi32(row01c, row01d); /* row0h=(04 05 06 07) */ \
row1h = _mm_unpackhi_pi32(row01c, row01d); /* row1h=(14 15 16 17) */ \
row2h = _mm_unpacklo_pi32(row23c, row23d); /* row2h=(24 25 26 27) */ \
row3h = _mm_unpackhi_pi32(row23c, row23d); /* row3h=(34 35 36 37) */ \
\
_mm_store_si64((__m64 *)&wsptr[DCTSIZE * 0], row0l); \
_mm_store_si64((__m64 *)&wsptr[DCTSIZE * 0 + 4], row0h); \
_mm_store_si64((__m64 *)&wsptr[DCTSIZE * 1], row1l); \
_mm_store_si64((__m64 *)&wsptr[DCTSIZE * 1 + 4], row1h); \
_mm_store_si64((__m64 *)&wsptr[DCTSIZE * 2], row2l); \
_mm_store_si64((__m64 *)&wsptr[DCTSIZE * 2 + 4], row2h); \
_mm_store_si64((__m64 *)&wsptr[DCTSIZE * 3], row3l); \
_mm_store_si64((__m64 *)&wsptr[DCTSIZE * 3 + 4], row3h); \
}
#define DO_IDCT_PASS2(ctr) { \
__m64 row0l, row1l, row2l, row3l, row4l, row5l, row6l, row7l; \
__m64 col0123a, col0123b, col0123c, col0123d; \
__m64 col01l, col01h, col23l, col23h; \
__m64 col0, col1, col2, col3; \
__m64 row06, row17, row24, row35; \
\
row0l = _mm_load_si64((__m64 *)&wsptr[DCTSIZE * 0]); /* (00 01 02 03) */ \
row1l = _mm_load_si64((__m64 *)&wsptr[DCTSIZE * 1]); /* (10 11 12 13) */ \
row2l = _mm_load_si64((__m64 *)&wsptr[DCTSIZE * 2]); /* (20 21 22 23) */ \
row3l = _mm_load_si64((__m64 *)&wsptr[DCTSIZE * 3]); /* (30 31 32 33) */ \
row4l = _mm_load_si64((__m64 *)&wsptr[DCTSIZE * 4]); /* (40 41 42 43) */ \
row5l = _mm_load_si64((__m64 *)&wsptr[DCTSIZE * 5]); /* (50 51 52 53) */ \
row6l = _mm_load_si64((__m64 *)&wsptr[DCTSIZE * 6]); /* (60 61 62 63) */ \
row7l = _mm_load_si64((__m64 *)&wsptr[DCTSIZE * 7]); /* (70 71 72 73) */ \
\
/* Even part */ \
\
tmp10 = _mm_add_pi16(row0l, row4l); \
tmp11 = _mm_sub_pi16(row0l, row4l); \
tmp13 = _mm_add_pi16(row2l, row6l); \
\
tmp12 = _mm_sub_pi16(row2l, row6l); \
tmp12 = _mm_slli_pi16(tmp12, PRE_MULTIPLY_SCALE_BITS); \
tmp12 = _mm_mulhi_pi16(tmp12, PW_F1414); \
tmp12 = _mm_sub_pi16(tmp12, tmp13); \
\
tmp0 = _mm_add_pi16(tmp10, tmp13); \
tmp3 = _mm_sub_pi16(tmp10, tmp13); \
tmp1 = _mm_add_pi16(tmp11, tmp12); \
tmp2 = _mm_sub_pi16(tmp11, tmp12); \
\
/* Odd part */ \
\
z13 = _mm_add_pi16(row5l, row3l); \
z10 = _mm_sub_pi16(row5l, row3l); \
z11 = _mm_add_pi16(row1l, row7l); \
z12 = _mm_sub_pi16(row1l, row7l); \
\
DO_IDCT_COMMON() \
\
/* out0=(00 01 02 03), out1=(10 11 12 13) */ \
/* out2=(20 21 22 23), out3=(30 31 32 33) */ \
/* out4=(40 41 42 43), out5=(50 51 52 53) */ \
/* out6=(60 61 62 63), out7=(70 71 72 73) */ \
\
out0 = _mm_srai_pi16(out0, PASS1_BITS + 3); \
out1 = _mm_srai_pi16(out1, PASS1_BITS + 3); \
out2 = _mm_srai_pi16(out2, PASS1_BITS + 3); \
out3 = _mm_srai_pi16(out3, PASS1_BITS + 3); \
out4 = _mm_srai_pi16(out4, PASS1_BITS + 3); \
out5 = _mm_srai_pi16(out5, PASS1_BITS + 3); \
out6 = _mm_srai_pi16(out6, PASS1_BITS + 3); \
out7 = _mm_srai_pi16(out7, PASS1_BITS + 3); \
\
row06 = _mm_packs_pi16(out0, out6); /* row06=(00 01 02 03 60 61 62 63) */ \
row17 = _mm_packs_pi16(out1, out7); /* row17=(10 11 12 13 70 71 72 73) */ \
row24 = _mm_packs_pi16(out2, out4); /* row24=(20 21 22 23 40 41 42 43) */ \
row35 = _mm_packs_pi16(out3, out5); /* row35=(30 31 32 33 50 51 52 53) */ \
\
row06 = _mm_add_pi8(row06, PB_CENTERJSAMP); \
row17 = _mm_add_pi8(row17, PB_CENTERJSAMP); \
row24 = _mm_add_pi8(row24, PB_CENTERJSAMP); \
row35 = _mm_add_pi8(row35, PB_CENTERJSAMP); \
\
/* Transpose coefficients */ \
\
col0123a = _mm_unpacklo_pi8(row06, row17); /* col0123a=(00 10 01 11 02 12 03 13) */ \
col0123d = _mm_unpackhi_pi8(row06, row17); /* col0123d=(60 70 61 71 62 72 63 73) */ \
col0123b = _mm_unpacklo_pi8(row24, row35); /* col0123b=(20 30 21 31 22 32 23 33) */ \
col0123c = _mm_unpackhi_pi8(row24, row35); /* col0123c=(40 50 41 51 42 52 43 53) */ \
\
col01l = _mm_unpacklo_pi16(col0123a, col0123b); /* col01l=(00 10 20 30 01 11 21 31) */ \
col23l = _mm_unpackhi_pi16(col0123a, col0123b); /* col23l=(02 12 22 32 03 13 23 33) */ \
col01h = _mm_unpacklo_pi16(col0123c, col0123d); /* col01h=(40 50 60 70 41 51 61 71) */ \
col23h = _mm_unpackhi_pi16(col0123c, col0123d); /* col23h=(42 52 62 72 43 53 63 73) */ \
\
col0 = _mm_unpacklo_pi32(col01l, col01h); /* col0=(00 10 20 30 40 50 60 70) */ \
col1 = _mm_unpackhi_pi32(col01l, col01h); /* col1=(01 11 21 31 41 51 61 71) */ \
col2 = _mm_unpacklo_pi32(col23l, col23h); /* col2=(02 12 22 32 42 52 62 72) */ \
col3 = _mm_unpackhi_pi32(col23l, col23h); /* col3=(03 13 23 33 43 53 63 73) */ \
\
_mm_store_si64((__m64 *)(output_buf[ctr + 0] + output_col), col0); \
_mm_store_si64((__m64 *)(output_buf[ctr + 1] + output_col), col1); \
_mm_store_si64((__m64 *)(output_buf[ctr + 2] + output_col), col2); \
_mm_store_si64((__m64 *)(output_buf[ctr + 3] + output_col), col3); \
}
void jsimd_idct_ifast_mmi(void *dct_table, JCOEFPTR coef_block,
JSAMPARRAY output_buf, JDIMENSION output_col)
{
__m64 tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
__m64 tmp10, tmp11, tmp12, tmp13;
__m64 out0, out1, out2, out3, out4, out5, out6, out7;
__m64 z5, z10, z11, z12, z13;
JCOEFPTR inptr;
ISLOW_MULT_TYPE *quantptr;
JCOEF *wsptr;
JCOEF workspace[DCTSIZE2]; /* buffers data between passes */
/* Pass 1: process columns. */
inptr = coef_block;
quantptr = (ISLOW_MULT_TYPE *)dct_table;
wsptr = workspace;
DO_IDCT_PASS1(1)
nextcolumn1:
inptr += 4;
quantptr += 4;
wsptr += DCTSIZE * 4;
DO_IDCT_PASS1(2)
nextcolumn2:
/* Pass 2: process rows. */
wsptr = workspace;
DO_IDCT_PASS2(0)
wsptr += 4;
DO_IDCT_PASS2(4)
}
|