Merge commit 'cebdedca57d95834a8f8098c7b6a322a1163e26b'
[ffmpeg.git] / libavcodec / x86 / idct_sse2_xvid.c
1 /*
2  * XVID MPEG-4 VIDEO CODEC
3  * - SSE2 inverse discrete cosine transform -
4  *
5  * Copyright(C) 2003 Pascal Massimino <skal@planet-d.net>
6  *
7  * Conversion to gcc syntax with modifications
8  * by Alexander Strange <astrange@ithinksw.com>
9  *
10  * Originally from dct/x86_asm/fdct_sse2_skal.asm in Xvid.
11  *
12  * This file is part of FFmpeg.
13  *
14  * Vertical pass is an implementation of the scheme:
15  *  Loeffler C., Ligtenberg A., and Moschytz C.S.:
16  *  Practical Fast 1D DCT Algorithm with Eleven Multiplications,
17  *  Proc. ICASSP 1989, 988-991.
18  *
19  * Horizontal pass is a double 4x4 vector/matrix multiplication,
20  * (see also Intel's Application Note 922:
21  *  http://developer.intel.com/vtune/cbts/strmsimd/922down.htm
22  *  Copyright (C) 1999 Intel Corporation)
23  *
24  * More details at http://skal.planet-d.net/coding/dct.html
25  *
26  * FFmpeg is free software; you can redistribute it and/or
27  * modify it under the terms of the GNU Lesser General Public
28  * License as published by the Free Software Foundation; either
29  * version 2.1 of the License, or (at your option) any later version.
30  *
31  * FFmpeg is distributed in the hope that it will be useful,
32  * but WITHOUT ANY WARRANTY; without even the implied warranty of
33  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
34  * Lesser General Public License for more details.
35  *
36  * You should have received a copy of the GNU Lesser General Public License
37  * along with FFmpeg; if not, write to the Free Software Foundation,
38  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
39  */
40
41 #include "libavutil/mem.h"
42 #include "libavutil/x86/asm.h"
43 #include "idct_xvid.h"
44 #include "dsputil_x86.h"
45
46 #if HAVE_INLINE_ASM
47
48 /**
49  * @file
50  * @brief SSE2 idct compatible with xvidmmx
51  */
52
53 #define X8(x)     x,x,x,x,x,x,x,x
54
55 #define ROW_SHIFT 11
56 #define COL_SHIFT 6
57
58 DECLARE_ASM_CONST(16, int16_t, tan1)[] = {X8(13036)}; // tan( pi/16)
59 DECLARE_ASM_CONST(16, int16_t, tan2)[] = {X8(27146)}; // tan(2pi/16) = sqrt(2)-1
60 DECLARE_ASM_CONST(16, int16_t, tan3)[] = {X8(43790)}; // tan(3pi/16)-1
61 DECLARE_ASM_CONST(16, int16_t, sqrt2)[]= {X8(23170)}; // 0.5/sqrt(2)
62 DECLARE_ASM_CONST(8,  uint8_t, m127)[] = {X8(127)};
63
64 DECLARE_ASM_CONST(16, int16_t, iTab1)[] = {
65  0x4000, 0x539f, 0xc000, 0xac61, 0x4000, 0xdd5d, 0x4000, 0xdd5d,
66  0x4000, 0x22a3, 0x4000, 0x22a3, 0xc000, 0x539f, 0x4000, 0xac61,
67  0x3249, 0x11a8, 0x4b42, 0xee58, 0x11a8, 0x4b42, 0x11a8, 0xcdb7,
68  0x58c5, 0x4b42, 0xa73b, 0xcdb7, 0x3249, 0xa73b, 0x4b42, 0xa73b
69 };
70
71 DECLARE_ASM_CONST(16, int16_t, iTab2)[] = {
72  0x58c5, 0x73fc, 0xa73b, 0x8c04, 0x58c5, 0xcff5, 0x58c5, 0xcff5,
73  0x58c5, 0x300b, 0x58c5, 0x300b, 0xa73b, 0x73fc, 0x58c5, 0x8c04,
74  0x45bf, 0x187e, 0x6862, 0xe782, 0x187e, 0x6862, 0x187e, 0xba41,
75  0x7b21, 0x6862, 0x84df, 0xba41, 0x45bf, 0x84df, 0x6862, 0x84df
76 };
77
78 DECLARE_ASM_CONST(16, int16_t, iTab3)[] = {
79  0x539f, 0x6d41, 0xac61, 0x92bf, 0x539f, 0xd2bf, 0x539f, 0xd2bf,
80  0x539f, 0x2d41, 0x539f, 0x2d41, 0xac61, 0x6d41, 0x539f, 0x92bf,
81  0x41b3, 0x1712, 0x6254, 0xe8ee, 0x1712, 0x6254, 0x1712, 0xbe4d,
82  0x73fc, 0x6254, 0x8c04, 0xbe4d, 0x41b3, 0x8c04, 0x6254, 0x8c04
83 };
84
85 DECLARE_ASM_CONST(16, int16_t, iTab4)[] = {
86  0x4b42, 0x6254, 0xb4be, 0x9dac, 0x4b42, 0xd746, 0x4b42, 0xd746,
87  0x4b42, 0x28ba, 0x4b42, 0x28ba, 0xb4be, 0x6254, 0x4b42, 0x9dac,
88  0x3b21, 0x14c3, 0x587e, 0xeb3d, 0x14c3, 0x587e, 0x14c3, 0xc4df,
89  0x6862, 0x587e, 0x979e, 0xc4df, 0x3b21, 0x979e, 0x587e, 0x979e
90 };
91
92 DECLARE_ASM_CONST(16, int32_t, walkenIdctRounders)[] = {
93  65536, 65536, 65536, 65536,
94   3597,  3597,  3597,  3597,
95   2260,  2260,  2260,  2260,
96   1203,  1203,  1203,  1203,
97    120,   120,   120,   120,
98    512,   512,   512,   512
99 };
100
101 // Temporary storage before the column pass
102 #define ROW1 "%%xmm6"
103 #define ROW3 "%%xmm4"
104 #define ROW5 "%%xmm5"
105 #define ROW7 "%%xmm7"
106
107 #define CLEAR_ODD(r) "pxor  "r","r" \n\t"
108 #define PUT_ODD(dst) "pshufhw  $0x1B, %%xmm2, "dst"   \n\t"
109
110 #if ARCH_X86_64
111
112 # define ROW0 "%%xmm8"
113 # define REG0 ROW0
114 # define ROW2 "%%xmm9"
115 # define REG2 ROW2
116 # define ROW4 "%%xmm10"
117 # define REG4 ROW4
118 # define ROW6 "%%xmm11"
119 # define REG6 ROW6
120 # define CLEAR_EVEN(r) CLEAR_ODD(r)
121 # define PUT_EVEN(dst) PUT_ODD(dst)
122 # define XMMS "%%xmm12"
123 # define MOV_32_ONLY "#"
124 # define SREG2 REG2
125 # define TAN3 "%%xmm13"
126 # define TAN1 "%%xmm14"
127
128 #else
129
130 # define ROW0 "(%0)"
131 # define REG0 "%%xmm4"
132 # define ROW2 "2*16(%0)"
133 # define REG2 "%%xmm4"
134 # define ROW4 "4*16(%0)"
135 # define REG4 "%%xmm6"
136 # define ROW6 "6*16(%0)"
137 # define REG6 "%%xmm6"
138 # define CLEAR_EVEN(r)
139 # define PUT_EVEN(dst) \
140     "pshufhw  $0x1B, %%xmm2, %%xmm2   \n\t" \
141     "movdqa          %%xmm2, "dst"    \n\t"
142 # define XMMS "%%xmm2"
143 # define MOV_32_ONLY "movdqa "
144 # define SREG2 "%%xmm7"
145 # define TAN3 "%%xmm0"
146 # define TAN1 "%%xmm2"
147
148 #endif
149
150 #define ROUND(x) "paddd   "MANGLE(x)
151
152 #define JZ(reg, to)                         \
153     "testl     "reg","reg"            \n\t" \
154     "jz        "to"                   \n\t"
155
156 #define JNZ(reg, to)                        \
157     "testl     "reg","reg"            \n\t" \
158     "jnz       "to"                   \n\t"
159
160 #define TEST_ONE_ROW(src, reg, clear)       \
161     clear                                   \
162     "movq     "src", %%mm1            \n\t" \
163     "por    8+"src", %%mm1            \n\t" \
164     "paddusb  %%mm0, %%mm1            \n\t" \
165     "pmovmskb %%mm1, "reg"            \n\t"
166
167 #define TEST_TWO_ROWS(row1, row2, reg1, reg2, clear1, clear2) \
168     clear1                                  \
169     clear2                                  \
170     "movq     "row1", %%mm1           \n\t" \
171     "por    8+"row1", %%mm1           \n\t" \
172     "movq     "row2", %%mm2           \n\t" \
173     "por    8+"row2", %%mm2           \n\t" \
174     "paddusb   %%mm0, %%mm1           \n\t" \
175     "paddusb   %%mm0, %%mm2           \n\t" \
176     "pmovmskb  %%mm1, "reg1"          \n\t" \
177     "pmovmskb  %%mm2, "reg2"          \n\t"
178
179 ///IDCT pass on rows.
180 #define iMTX_MULT(src, table, rounder, put) \
181     "movdqa        "src", %%xmm3      \n\t" \
182     "movdqa       %%xmm3, %%xmm0      \n\t" \
183     "pshufd   $0x11, %%xmm3, %%xmm1   \n\t" /* 4602 */ \
184     "punpcklqdq   %%xmm0, %%xmm0      \n\t" /* 0246 */ \
185     "pmaddwd     "table", %%xmm0      \n\t" \
186     "pmaddwd  16+"table", %%xmm1      \n\t" \
187     "pshufd   $0xBB, %%xmm3, %%xmm2   \n\t" /* 5713 */ \
188     "punpckhqdq   %%xmm3, %%xmm3      \n\t" /* 1357 */ \
189     "pmaddwd  32+"table", %%xmm2      \n\t" \
190     "pmaddwd  48+"table", %%xmm3      \n\t" \
191     "paddd        %%xmm1, %%xmm0      \n\t" \
192     "paddd        %%xmm3, %%xmm2      \n\t" \
193     rounder",     %%xmm0              \n\t" \
194     "movdqa       %%xmm2, %%xmm3      \n\t" \
195     "paddd        %%xmm0, %%xmm2      \n\t" \
196     "psubd        %%xmm3, %%xmm0      \n\t" \
197     "psrad           $11, %%xmm2      \n\t" \
198     "psrad           $11, %%xmm0      \n\t" \
199     "packssdw     %%xmm0, %%xmm2      \n\t" \
200     put                                     \
201     "1:                               \n\t"
202
203 #define iLLM_HEAD                           \
204     "movdqa   "MANGLE(tan3)", "TAN3"  \n\t" \
205     "movdqa   "MANGLE(tan1)", "TAN1"  \n\t" \
206
207 ///IDCT pass on columns.
208 #define iLLM_PASS(dct)                      \
209     "movdqa   "TAN3", %%xmm1          \n\t" \
210     "movdqa   "TAN1", %%xmm3          \n\t" \
211     "pmulhw   %%xmm4, "TAN3"          \n\t" \
212     "pmulhw   %%xmm5, %%xmm1          \n\t" \
213     "paddsw   %%xmm4, "TAN3"          \n\t" \
214     "paddsw   %%xmm5, %%xmm1          \n\t" \
215     "psubsw   %%xmm5, "TAN3"          \n\t" \
216     "paddsw   %%xmm4, %%xmm1          \n\t" \
217     "pmulhw   %%xmm7, %%xmm3          \n\t" \
218     "pmulhw   %%xmm6, "TAN1"          \n\t" \
219     "paddsw   %%xmm6, %%xmm3          \n\t" \
220     "psubsw   %%xmm7, "TAN1"          \n\t" \
221     "movdqa   %%xmm3, %%xmm7          \n\t" \
222     "movdqa   "TAN1", %%xmm6          \n\t" \
223     "psubsw   %%xmm1, %%xmm3          \n\t" \
224     "psubsw   "TAN3", "TAN1"          \n\t" \
225     "paddsw   %%xmm7, %%xmm1          \n\t" \
226     "paddsw   %%xmm6, "TAN3"          \n\t" \
227     "movdqa   %%xmm3, %%xmm6          \n\t" \
228     "psubsw   "TAN3", %%xmm3          \n\t" \
229     "paddsw   %%xmm6, "TAN3"          \n\t" \
230     "movdqa   "MANGLE(sqrt2)", %%xmm4 \n\t" \
231     "pmulhw   %%xmm4, %%xmm3          \n\t" \
232     "pmulhw   %%xmm4, "TAN3"          \n\t" \
233     "paddsw   "TAN3", "TAN3"          \n\t" \
234     "paddsw   %%xmm3, %%xmm3          \n\t" \
235     "movdqa   "MANGLE(tan2)", %%xmm7  \n\t" \
236     MOV_32_ONLY ROW2", "REG2"         \n\t" \
237     MOV_32_ONLY ROW6", "REG6"         \n\t" \
238     "movdqa   %%xmm7, %%xmm5          \n\t" \
239     "pmulhw   "REG6", %%xmm7          \n\t" \
240     "pmulhw   "REG2", %%xmm5          \n\t" \
241     "paddsw   "REG2", %%xmm7          \n\t" \
242     "psubsw   "REG6", %%xmm5          \n\t" \
243     MOV_32_ONLY ROW0", "REG0"         \n\t" \
244     MOV_32_ONLY ROW4", "REG4"         \n\t" \
245     MOV_32_ONLY"  "TAN1", (%0)        \n\t" \
246     "movdqa   "REG0", "XMMS"          \n\t" \
247     "psubsw   "REG4", "REG0"          \n\t" \
248     "paddsw   "XMMS", "REG4"          \n\t" \
249     "movdqa   "REG4", "XMMS"          \n\t" \
250     "psubsw   %%xmm7, "REG4"          \n\t" \
251     "paddsw   "XMMS", %%xmm7          \n\t" \
252     "movdqa   "REG0", "XMMS"          \n\t" \
253     "psubsw   %%xmm5, "REG0"          \n\t" \
254     "paddsw   "XMMS", %%xmm5          \n\t" \
255     "movdqa   %%xmm5, "XMMS"          \n\t" \
256     "psubsw   "TAN3", %%xmm5          \n\t" \
257     "paddsw   "XMMS", "TAN3"          \n\t" \
258     "movdqa   "REG0", "XMMS"          \n\t" \
259     "psubsw   %%xmm3, "REG0"          \n\t" \
260     "paddsw   "XMMS", %%xmm3          \n\t" \
261     MOV_32_ONLY"  (%0), "TAN1"        \n\t" \
262     "psraw        $6, %%xmm5          \n\t" \
263     "psraw        $6, "REG0"          \n\t" \
264     "psraw        $6, "TAN3"          \n\t" \
265     "psraw        $6, %%xmm3          \n\t" \
266     "movdqa   "TAN3", 1*16("dct")     \n\t" \
267     "movdqa   %%xmm3, 2*16("dct")     \n\t" \
268     "movdqa   "REG0", 5*16("dct")     \n\t" \
269     "movdqa   %%xmm5, 6*16("dct")     \n\t" \
270     "movdqa   %%xmm7, %%xmm0          \n\t" \
271     "movdqa   "REG4", %%xmm4          \n\t" \
272     "psubsw   %%xmm1, %%xmm7          \n\t" \
273     "psubsw   "TAN1", "REG4"          \n\t" \
274     "paddsw   %%xmm0, %%xmm1          \n\t" \
275     "paddsw   %%xmm4, "TAN1"          \n\t" \
276     "psraw        $6, %%xmm1          \n\t" \
277     "psraw        $6, %%xmm7          \n\t" \
278     "psraw        $6, "TAN1"          \n\t" \
279     "psraw        $6, "REG4"          \n\t" \
280     "movdqa   %%xmm1, ("dct")         \n\t" \
281     "movdqa   "TAN1", 3*16("dct")     \n\t" \
282     "movdqa   "REG4", 4*16("dct")     \n\t" \
283     "movdqa   %%xmm7, 7*16("dct")     \n\t"
284
285 ///IDCT pass on columns, assuming rows 4-7 are zero.
286 #define iLLM_PASS_SPARSE(dct)               \
287     "pmulhw   %%xmm4, "TAN3"          \n\t" \
288     "paddsw   %%xmm4, "TAN3"          \n\t" \
289     "movdqa   %%xmm6, %%xmm3          \n\t" \
290     "pmulhw   %%xmm6, "TAN1"          \n\t" \
291     "movdqa   %%xmm4, %%xmm1          \n\t" \
292     "psubsw   %%xmm1, %%xmm3          \n\t" \
293     "paddsw   %%xmm6, %%xmm1          \n\t" \
294     "movdqa   "TAN1", %%xmm6          \n\t" \
295     "psubsw   "TAN3", "TAN1"          \n\t" \
296     "paddsw   %%xmm6, "TAN3"          \n\t" \
297     "movdqa   %%xmm3, %%xmm6          \n\t" \
298     "psubsw   "TAN3", %%xmm3          \n\t" \
299     "paddsw   %%xmm6, "TAN3"          \n\t" \
300     "movdqa   "MANGLE(sqrt2)", %%xmm4 \n\t" \
301     "pmulhw   %%xmm4, %%xmm3          \n\t" \
302     "pmulhw   %%xmm4, "TAN3"          \n\t" \
303     "paddsw   "TAN3", "TAN3"          \n\t" \
304     "paddsw   %%xmm3, %%xmm3          \n\t" \
305     "movdqa   "MANGLE(tan2)", %%xmm5  \n\t" \
306     MOV_32_ONLY ROW2", "SREG2"        \n\t" \
307     "pmulhw   "SREG2", %%xmm5         \n\t" \
308     MOV_32_ONLY ROW0", "REG0"         \n\t" \
309     "movdqa   "REG0", %%xmm6          \n\t" \
310     "psubsw   "SREG2", %%xmm6         \n\t" \
311     "paddsw   "REG0", "SREG2"         \n\t" \
312     MOV_32_ONLY"  "TAN1", (%0)        \n\t" \
313     "movdqa   "REG0", "XMMS"          \n\t" \
314     "psubsw   %%xmm5, "REG0"          \n\t" \
315     "paddsw   "XMMS", %%xmm5          \n\t" \
316     "movdqa   %%xmm5, "XMMS"          \n\t" \
317     "psubsw   "TAN3", %%xmm5          \n\t" \
318     "paddsw   "XMMS", "TAN3"          \n\t" \
319     "movdqa   "REG0", "XMMS"          \n\t" \
320     "psubsw   %%xmm3, "REG0"          \n\t" \
321     "paddsw   "XMMS", %%xmm3          \n\t" \
322     MOV_32_ONLY"  (%0), "TAN1"        \n\t" \
323     "psraw        $6, %%xmm5          \n\t" \
324     "psraw        $6, "REG0"          \n\t" \
325     "psraw        $6, "TAN3"          \n\t" \
326     "psraw        $6, %%xmm3          \n\t" \
327     "movdqa   "TAN3", 1*16("dct")     \n\t" \
328     "movdqa   %%xmm3, 2*16("dct")     \n\t" \
329     "movdqa   "REG0", 5*16("dct")     \n\t" \
330     "movdqa   %%xmm5, 6*16("dct")     \n\t" \
331     "movdqa   "SREG2", %%xmm0         \n\t" \
332     "movdqa   %%xmm6, %%xmm4          \n\t" \
333     "psubsw   %%xmm1, "SREG2"         \n\t" \
334     "psubsw   "TAN1", %%xmm6          \n\t" \
335     "paddsw   %%xmm0, %%xmm1          \n\t" \
336     "paddsw   %%xmm4, "TAN1"          \n\t" \
337     "psraw        $6, %%xmm1          \n\t" \
338     "psraw        $6, "SREG2"         \n\t" \
339     "psraw        $6, "TAN1"          \n\t" \
340     "psraw        $6, %%xmm6          \n\t" \
341     "movdqa   %%xmm1, ("dct")         \n\t" \
342     "movdqa   "TAN1", 3*16("dct")     \n\t" \
343     "movdqa   %%xmm6, 4*16("dct")     \n\t" \
344     "movdqa   "SREG2", 7*16("dct")    \n\t"
345
346 inline void ff_idct_xvid_sse2(short *block)
347 {
348     __asm__ volatile(
349     "movq     "MANGLE(m127)", %%mm0                              \n\t"
350     iMTX_MULT("(%0)",     MANGLE(iTab1), ROUND(walkenIdctRounders),      PUT_EVEN(ROW0))
351     iMTX_MULT("1*16(%0)", MANGLE(iTab2), ROUND(walkenIdctRounders+1*16), PUT_ODD(ROW1))
352     iMTX_MULT("2*16(%0)", MANGLE(iTab3), ROUND(walkenIdctRounders+2*16), PUT_EVEN(ROW2))
353
354     TEST_TWO_ROWS("3*16(%0)", "4*16(%0)", "%%eax", "%%ecx", CLEAR_ODD(ROW3), CLEAR_EVEN(ROW4))
355     JZ("%%eax", "1f")
356     iMTX_MULT("3*16(%0)", MANGLE(iTab4), ROUND(walkenIdctRounders+3*16), PUT_ODD(ROW3))
357
358     TEST_TWO_ROWS("5*16(%0)", "6*16(%0)", "%%eax", "%%edx", CLEAR_ODD(ROW5), CLEAR_EVEN(ROW6))
359     TEST_ONE_ROW("7*16(%0)", "%%esi", CLEAR_ODD(ROW7))
360     iLLM_HEAD
361     ".p2align 4 \n\t"
362     JNZ("%%ecx", "2f")
363     JNZ("%%eax", "3f")
364     JNZ("%%edx", "4f")
365     JNZ("%%esi", "5f")
366     iLLM_PASS_SPARSE("%0")
367     "jmp 6f                                                      \n\t"
368     "2:                                                          \n\t"
369     iMTX_MULT("4*16(%0)", MANGLE(iTab1), "#", PUT_EVEN(ROW4))
370     "3:                                                          \n\t"
371     iMTX_MULT("5*16(%0)", MANGLE(iTab4), ROUND(walkenIdctRounders+4*16), PUT_ODD(ROW5))
372     JZ("%%edx", "1f")
373     "4:                                                          \n\t"
374     iMTX_MULT("6*16(%0)", MANGLE(iTab3), ROUND(walkenIdctRounders+5*16), PUT_EVEN(ROW6))
375     JZ("%%esi", "1f")
376     "5:                                                          \n\t"
377     iMTX_MULT("7*16(%0)", MANGLE(iTab2), ROUND(walkenIdctRounders+5*16), PUT_ODD(ROW7))
378 #if ARCH_X86_32
379     iLLM_HEAD
380 #endif
381     iLLM_PASS("%0")
382     "6:                                                          \n\t"
383     : "+r"(block)
384     :
385     : XMM_CLOBBERS("%xmm0" , "%xmm1" , "%xmm2" , "%xmm3" ,
386                    "%xmm4" , "%xmm5" , "%xmm6" , "%xmm7" ,)
387 #if ARCH_X86_64
388       XMM_CLOBBERS("%xmm8" , "%xmm9" , "%xmm10", "%xmm11",
389                    "%xmm12", "%xmm13", "%xmm14",)
390 #endif
391       "%eax", "%ecx", "%edx", "%esi", "memory"
392     );
393 }
394
395 void ff_idct_xvid_sse2_put(uint8_t *dest, int line_size, short *block)
396 {
397     ff_idct_xvid_sse2(block);
398     ff_put_pixels_clamped_mmx(block, dest, line_size);
399 }
400
401 void ff_idct_xvid_sse2_add(uint8_t *dest, int line_size, short *block)
402 {
403     ff_idct_xvid_sse2(block);
404     ff_add_pixels_clamped_mmx(block, dest, line_size);
405 }
406
407 #endif /* HAVE_INLINE_ASM */