FFmpeg
h264dsp_init.c
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1 /*
2  * Copyright (c) 2004-2005 Michael Niedermayer, Loren Merritt
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg 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  * FFmpeg 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 FFmpeg; 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/attributes.h"
22 #include "libavutil/cpu.h"
23 #include "libavutil/x86/asm.h"
24 #include "libavutil/x86/cpu.h"
25 #include "libavcodec/h264dsp.h"
26 
27 /***********************************/
28 /* IDCT */
29 #define IDCT_ADD_FUNC(NUM, DEPTH, OPT) \
30 void ff_h264_idct ## NUM ## _add_ ## DEPTH ## _ ## OPT(uint8_t *dst, \
31  int16_t *block, \
32  int stride);
33 
34 IDCT_ADD_FUNC(, 8, sse2)
35 IDCT_ADD_FUNC(, 8, avx)
36 IDCT_ADD_FUNC(, 10, sse2)
37 IDCT_ADD_FUNC(_dc, 8, sse2)
38 IDCT_ADD_FUNC(_dc, 8, avx)
39 IDCT_ADD_FUNC(_dc, 10, mmxext)
40 IDCT_ADD_FUNC(8_dc, 8, mmxext)
41 IDCT_ADD_FUNC(8_dc, 10, sse2)
42 IDCT_ADD_FUNC(8, 8, sse2)
43 IDCT_ADD_FUNC(8, 10, sse2)
44 IDCT_ADD_FUNC(, 10, avx)
45 IDCT_ADD_FUNC(8_dc, 10, avx)
46 IDCT_ADD_FUNC(8, 10, avx)
47 
48 
49 #define IDCT_ADD_REP_FUNC(NUM, REP, DEPTH, OPT) \
50 void ff_h264_idct ## NUM ## _add ## REP ## _ ## DEPTH ## _ ## OPT \
51  (uint8_t *dst, const int *block_offset, \
52  int16_t *block, int stride, const uint8_t nnzc[5 * 8]);
53 
54 IDCT_ADD_REP_FUNC(8, 4, 8, sse2)
55 IDCT_ADD_REP_FUNC(8, 4, 10, sse2)
56 IDCT_ADD_REP_FUNC(8, 4, 10, avx)
57 IDCT_ADD_REP_FUNC(, 16, 8, sse2)
58 IDCT_ADD_REP_FUNC(, 16, 10, sse2)
59 IDCT_ADD_REP_FUNC(, 16intra, 8, sse2)
60 IDCT_ADD_REP_FUNC(, 16intra, 10, sse2)
61 IDCT_ADD_REP_FUNC(, 16, 10, avx)
62 IDCT_ADD_REP_FUNC(, 16intra, 10, avx)
63 
64 
65 #define IDCT_ADD_REP_FUNC2(NUM, REP, DEPTH, OPT) \
66 void ff_h264_idct ## NUM ## _add ## REP ## _ ## DEPTH ## _ ## OPT \
67  (uint8_t **dst, const int *block_offset, \
68  int16_t *block, int stride, const uint8_t nnzc[15 * 8]);
69 
70 IDCT_ADD_REP_FUNC2(, 8, 8, sse2)
71 IDCT_ADD_REP_FUNC2(, 8, 10, sse2)
72 IDCT_ADD_REP_FUNC2(, 8, 10, avx)
73 
74 IDCT_ADD_REP_FUNC2(, 8_422, 8, mmx)
75 
76 IDCT_ADD_REP_FUNC2(, 8_422, 10, sse2)
77 IDCT_ADD_REP_FUNC2(, 8_422, 10, avx)
78 
79 void ff_h264_luma_dc_dequant_idct_sse2(int16_t *output, int16_t *input, int qmul);
80 
81 /***********************************/
82 /* deblocking */
83 
84 void ff_h264_loop_filter_strength_mmxext(int16_t bS[2][4][4], uint8_t nnz[40],
85  int8_t ref[2][40],
86  int16_t mv[2][40][2],
87  int bidir, int edges, int step,
88  int mask_mv0, int mask_mv1, int field);
89 
90 #define LF_FUNC(DIR, TYPE, DEPTH, OPT) \
91 void ff_deblock_ ## DIR ## _ ## TYPE ## _ ## DEPTH ## _ ## OPT(uint8_t *pix, \
92  ptrdiff_t stride, \
93  int alpha, \
94  int beta, \
95  int8_t *tc0);
96 #define LF_IFUNC(DIR, TYPE, DEPTH, OPT) \
97 void ff_deblock_ ## DIR ## _ ## TYPE ## _ ## DEPTH ## _ ## OPT(uint8_t *pix, \
98  ptrdiff_t stride, \
99  int alpha, \
100  int beta);
101 
102 #define LF_FUNCS(type, depth) \
103 LF_FUNC(h, luma, depth, sse2) \
104 LF_IFUNC(h, luma_intra, depth, sse2) \
105 LF_FUNC(v, luma, depth, sse2) \
106 LF_IFUNC(v, luma_intra, depth, sse2) \
107 LF_FUNC(h, chroma, depth, sse2) \
108 LF_IFUNC(h, chroma_intra, depth, sse2) \
109 LF_FUNC(h, chroma422, depth, sse2) \
110 LF_IFUNC(h, chroma422_intra, depth, sse2) \
111 LF_FUNC(v, chroma, depth, sse2) \
112 LF_IFUNC(v, chroma_intra, depth, sse2) \
113 LF_FUNC(h, luma, depth, avx) \
114 LF_IFUNC(h, luma_intra, depth, avx) \
115 LF_FUNC(v, luma, depth, avx) \
116 LF_IFUNC(v, luma_intra, depth, avx) \
117 LF_FUNC(h, chroma, depth, avx) \
118 LF_IFUNC(h, chroma_intra, depth, avx) \
119 LF_FUNC(h, chroma422, depth, avx) \
120 LF_IFUNC(h, chroma422_intra, depth, avx) \
121 LF_FUNC(v, chroma, depth, avx) \
122 LF_IFUNC(v, chroma_intra, depth, avx)
123 
124 LF_FUNC(h, luma_mbaff, 8, sse2)
125 LF_FUNC(h, luma_mbaff, 8, avx)
126 
127 LF_FUNCS(uint8_t, 8)
128 LF_FUNCS(uint16_t, 10)
129 
130 LF_FUNC(v, luma, 10, mmxext)
131 LF_FUNC(h, luma, 10, mmxext)
132 LF_IFUNC(v, luma_intra, 10, mmxext)
133 LF_IFUNC(h, luma_intra, 10, mmxext)
134 
135 /***********************************/
136 /* weighted prediction */
137 
138 #define H264_WEIGHT(W, OPT) \
139 void ff_h264_weight_ ## W ## _ ## OPT(uint8_t *dst, ptrdiff_t stride, \
140  int height, int log2_denom, \
141  int weight, int offset);
142 
143 #define H264_BIWEIGHT(W, OPT) \
144 void ff_h264_biweight_ ## W ## _ ## OPT(uint8_t *dst, uint8_t *src, \
145  ptrdiff_t stride, int height, \
146  int log2_denom, int weightd, \
147  int weights, int offset);
148 
149 #define H264_BIWEIGHT_MMX(W) \
150  H264_WEIGHT(W, mmxext) \
151  H264_BIWEIGHT(W, mmxext)
152 
153 #define H264_BIWEIGHT_SSE(W) \
154  H264_WEIGHT(W, sse2) \
155  H264_BIWEIGHT(W, sse2) \
156  H264_BIWEIGHT(W, ssse3)
157 
161 
162 #define H264_WEIGHT_10(W, DEPTH, OPT) \
163 void ff_h264_weight_ ## W ## _ ## DEPTH ## _ ## OPT(uint8_t *dst, \
164  ptrdiff_t stride, \
165  int height, \
166  int log2_denom, \
167  int weight, \
168  int offset);
169 
170 #define H264_BIWEIGHT_10(W, DEPTH, OPT) \
171 void ff_h264_biweight_ ## W ## _ ## DEPTH ## _ ## OPT(uint8_t *dst, \
172  uint8_t *src, \
173  ptrdiff_t stride, \
174  int height, \
175  int log2_denom, \
176  int weightd, \
177  int weights, \
178  int offset);
179 
180 #define H264_BIWEIGHT_10_SSE(W, DEPTH) \
181  H264_WEIGHT_10(W, DEPTH, sse2) \
182  H264_WEIGHT_10(W, DEPTH, sse4) \
183  H264_BIWEIGHT_10(W, DEPTH, sse2) \
184  H264_BIWEIGHT_10(W, DEPTH, sse4)
185 
186 H264_BIWEIGHT_10_SSE(16, 10)
189 
191  const int chroma_format_idc)
192 {
193 #if HAVE_X86ASM
194  int cpu_flags = av_get_cpu_flags();
195 
196  if (EXTERNAL_MMXEXT(cpu_flags) && chroma_format_idc <= 1)
197  c->h264_loop_filter_strength = ff_h264_loop_filter_strength_mmxext;
198 
199  if (bit_depth == 8) {
200  if (EXTERNAL_MMX(cpu_flags)) {
201  if (chroma_format_idc <= 1) {
202  } else {
203  c->h264_idct_add8 = ff_h264_idct_add8_422_8_mmx;
204  }
205  }
206  if (EXTERNAL_MMXEXT(cpu_flags)) {
207  c->h264_idct8_dc_add = ff_h264_idct8_dc_add_8_mmxext;
208 
209  c->weight_h264_pixels_tab[2] = ff_h264_weight_4_mmxext;
210 
211  c->biweight_h264_pixels_tab[2] = ff_h264_biweight_4_mmxext;
212  }
213  if (EXTERNAL_SSE2(cpu_flags)) {
214  c->h264_idct8_add = ff_h264_idct8_add_8_sse2;
215 
216  c->h264_idct_add16 = ff_h264_idct_add16_8_sse2;
217  c->h264_idct8_add4 = ff_h264_idct8_add4_8_sse2;
218  if (chroma_format_idc <= 1)
219  c->h264_idct_add8 = ff_h264_idct_add8_8_sse2;
220  c->h264_idct_add16intra = ff_h264_idct_add16intra_8_sse2;
221  c->h264_luma_dc_dequant_idct = ff_h264_luma_dc_dequant_idct_sse2;
222 
223  c->weight_h264_pixels_tab[0] = ff_h264_weight_16_sse2;
224  c->weight_h264_pixels_tab[1] = ff_h264_weight_8_sse2;
225 
226  c->biweight_h264_pixels_tab[0] = ff_h264_biweight_16_sse2;
227  c->biweight_h264_pixels_tab[1] = ff_h264_biweight_8_sse2;
228 
229  c->h264_v_loop_filter_luma = ff_deblock_v_luma_8_sse2;
230  c->h264_h_loop_filter_luma = ff_deblock_h_luma_8_sse2;
231  c->h264_v_loop_filter_luma_intra = ff_deblock_v_luma_intra_8_sse2;
232  c->h264_h_loop_filter_luma_intra = ff_deblock_h_luma_intra_8_sse2;
233 
234 #if ARCH_X86_64
235  c->h264_h_loop_filter_luma_mbaff = ff_deblock_h_luma_mbaff_8_sse2;
236 #endif
237 
238  c->h264_v_loop_filter_chroma = ff_deblock_v_chroma_8_sse2;
239  c->h264_v_loop_filter_chroma_intra = ff_deblock_v_chroma_intra_8_sse2;
240  if (chroma_format_idc <= 1) {
241  c->h264_h_loop_filter_chroma = ff_deblock_h_chroma_8_sse2;
242  c->h264_h_loop_filter_chroma_intra = ff_deblock_h_chroma_intra_8_sse2;
243  } else {
244  c->h264_h_loop_filter_chroma = ff_deblock_h_chroma422_8_sse2;
245  c->h264_h_loop_filter_chroma_intra = ff_deblock_h_chroma422_intra_8_sse2;
246  }
247 
248  c->h264_idct_add = ff_h264_idct_add_8_sse2;
249  c->h264_idct_dc_add = ff_h264_idct_dc_add_8_sse2;
250  }
251  if (EXTERNAL_SSSE3(cpu_flags)) {
252  c->biweight_h264_pixels_tab[0] = ff_h264_biweight_16_ssse3;
253  c->biweight_h264_pixels_tab[1] = ff_h264_biweight_8_ssse3;
254  }
255  if (EXTERNAL_AVX(cpu_flags)) {
256  c->h264_v_loop_filter_luma = ff_deblock_v_luma_8_avx;
257  c->h264_h_loop_filter_luma = ff_deblock_h_luma_8_avx;
258  c->h264_v_loop_filter_luma_intra = ff_deblock_v_luma_intra_8_avx;
259  c->h264_h_loop_filter_luma_intra = ff_deblock_h_luma_intra_8_avx;
260 #if ARCH_X86_64
261  c->h264_h_loop_filter_luma_mbaff = ff_deblock_h_luma_mbaff_8_avx;
262 #endif
263 
264  c->h264_v_loop_filter_chroma = ff_deblock_v_chroma_8_avx;
265  c->h264_v_loop_filter_chroma_intra = ff_deblock_v_chroma_intra_8_avx;
266  if (chroma_format_idc <= 1) {
267  c->h264_h_loop_filter_chroma = ff_deblock_h_chroma_8_avx;
268  c->h264_h_loop_filter_chroma_intra = ff_deblock_h_chroma_intra_8_avx;
269  } else {
270  c->h264_h_loop_filter_chroma = ff_deblock_h_chroma422_8_avx;
271  c->h264_h_loop_filter_chroma_intra = ff_deblock_h_chroma422_intra_8_avx;
272  }
273 
274  c->h264_idct_add = ff_h264_idct_add_8_avx;
275  c->h264_idct_dc_add = ff_h264_idct_dc_add_8_avx;
276  }
277  } else if (bit_depth == 10) {
278  if (EXTERNAL_MMXEXT(cpu_flags)) {
279 #if ARCH_X86_32 && !HAVE_ALIGNED_STACK
280  c->h264_v_loop_filter_luma = ff_deblock_v_luma_10_mmxext;
281  c->h264_h_loop_filter_luma = ff_deblock_h_luma_10_mmxext;
282  c->h264_v_loop_filter_luma_intra = ff_deblock_v_luma_intra_10_mmxext;
283  c->h264_h_loop_filter_luma_intra = ff_deblock_h_luma_intra_10_mmxext;
284 #endif /* ARCH_X86_32 && !HAVE_ALIGNED_STACK */
285  c->h264_idct_dc_add = ff_h264_idct_dc_add_10_mmxext;
286  }
287  if (EXTERNAL_SSE2(cpu_flags)) {
288  c->h264_idct_add = ff_h264_idct_add_10_sse2;
289  c->h264_idct8_dc_add = ff_h264_idct8_dc_add_10_sse2;
290 
291  c->h264_idct_add16 = ff_h264_idct_add16_10_sse2;
292  if (chroma_format_idc <= 1) {
293  c->h264_idct_add8 = ff_h264_idct_add8_10_sse2;
294  } else {
295  c->h264_idct_add8 = ff_h264_idct_add8_422_10_sse2;
296  }
297  c->h264_idct_add16intra = ff_h264_idct_add16intra_10_sse2;
298 #if HAVE_ALIGNED_STACK
299  c->h264_idct8_add = ff_h264_idct8_add_10_sse2;
300  c->h264_idct8_add4 = ff_h264_idct8_add4_10_sse2;
301 #endif /* HAVE_ALIGNED_STACK */
302 
303  c->weight_h264_pixels_tab[0] = ff_h264_weight_16_10_sse2;
304  c->weight_h264_pixels_tab[1] = ff_h264_weight_8_10_sse2;
305  c->weight_h264_pixels_tab[2] = ff_h264_weight_4_10_sse2;
306 
307  c->biweight_h264_pixels_tab[0] = ff_h264_biweight_16_10_sse2;
308  c->biweight_h264_pixels_tab[1] = ff_h264_biweight_8_10_sse2;
309  c->biweight_h264_pixels_tab[2] = ff_h264_biweight_4_10_sse2;
310 
311  c->h264_v_loop_filter_chroma = ff_deblock_v_chroma_10_sse2;
312  c->h264_v_loop_filter_chroma_intra = ff_deblock_v_chroma_intra_10_sse2;
313  if (chroma_format_idc <= 1) {
314  c->h264_h_loop_filter_chroma = ff_deblock_h_chroma_10_sse2;
315  } else {
316  c->h264_h_loop_filter_chroma = ff_deblock_h_chroma422_10_sse2;
317  }
318 #if HAVE_ALIGNED_STACK
319  c->h264_v_loop_filter_luma = ff_deblock_v_luma_10_sse2;
320  c->h264_h_loop_filter_luma = ff_deblock_h_luma_10_sse2;
321  c->h264_v_loop_filter_luma_intra = ff_deblock_v_luma_intra_10_sse2;
322  c->h264_h_loop_filter_luma_intra = ff_deblock_h_luma_intra_10_sse2;
323 #endif /* HAVE_ALIGNED_STACK */
324  }
325  if (EXTERNAL_SSE4(cpu_flags)) {
326  c->weight_h264_pixels_tab[0] = ff_h264_weight_16_10_sse4;
327  c->weight_h264_pixels_tab[1] = ff_h264_weight_8_10_sse4;
328  c->weight_h264_pixels_tab[2] = ff_h264_weight_4_10_sse4;
329 
330  c->biweight_h264_pixels_tab[0] = ff_h264_biweight_16_10_sse4;
331  c->biweight_h264_pixels_tab[1] = ff_h264_biweight_8_10_sse4;
332  c->biweight_h264_pixels_tab[2] = ff_h264_biweight_4_10_sse4;
333  }
334  if (EXTERNAL_AVX(cpu_flags)) {
335  c->h264_idct_dc_add =
336  c->h264_idct_add = ff_h264_idct_add_10_avx;
337  c->h264_idct8_dc_add = ff_h264_idct8_dc_add_10_avx;
338 
339  c->h264_idct_add16 = ff_h264_idct_add16_10_avx;
340  if (chroma_format_idc <= 1) {
341  c->h264_idct_add8 = ff_h264_idct_add8_10_avx;
342  } else {
343  c->h264_idct_add8 = ff_h264_idct_add8_422_10_avx;
344  }
345  c->h264_idct_add16intra = ff_h264_idct_add16intra_10_avx;
346 #if HAVE_ALIGNED_STACK
347  c->h264_idct8_add = ff_h264_idct8_add_10_avx;
348  c->h264_idct8_add4 = ff_h264_idct8_add4_10_avx;
349 #endif /* HAVE_ALIGNED_STACK */
350 
351  c->h264_v_loop_filter_chroma = ff_deblock_v_chroma_10_avx;
352  c->h264_v_loop_filter_chroma_intra = ff_deblock_v_chroma_intra_10_avx;
353  if (chroma_format_idc <= 1) {
354  c->h264_h_loop_filter_chroma = ff_deblock_h_chroma_10_avx;
355  } else {
356  c->h264_h_loop_filter_chroma = ff_deblock_h_chroma422_10_avx;
357  }
358 #if HAVE_ALIGNED_STACK
359  c->h264_v_loop_filter_luma = ff_deblock_v_luma_10_avx;
360  c->h264_h_loop_filter_luma = ff_deblock_h_luma_10_avx;
361  c->h264_v_loop_filter_luma_intra = ff_deblock_v_luma_intra_10_avx;
362  c->h264_h_loop_filter_luma_intra = ff_deblock_h_luma_intra_10_avx;
363 #endif /* HAVE_ALIGNED_STACK */
364  }
365  }
366 #endif
367 }
bit_depth
static void bit_depth(AudioStatsContext *s, uint64_t mask, uint64_t imask, AVRational *depth)
Definition: af_astats.c:226
cpu.h
mv
static const int8_t mv[256][2]
Definition: 4xm.c:80
output
filter_frame For filters that do not use the this method is called when a frame is pushed to the filter s input It can be called at any time except in a reentrant way If the input frame is enough to produce output
Definition: filter_design.txt:225
LF_FUNC
#define LF_FUNC(DIR, TYPE, DEPTH, OPT)
Definition: h264dsp_init.c:90
ff_h264_luma_dc_dequant_idct_sse2
void ff_h264_luma_dc_dequant_idct_sse2(int16_t *output, int16_t *input, int qmul)
step
trying all byte sequences megabyte in length and selecting the best looking sequence will yield cases to try But a word about which is also called distortion Distortion can be quantified by almost any quality measurement one chooses the sum of squared differences is used but more complex methods that consider psychovisual effects can be used as well It makes no difference in this discussion First step
Definition: rate_distortion.txt:58
IDCT_ADD_REP_FUNC
#define IDCT_ADD_REP_FUNC(NUM, REP, DEPTH, OPT)
Definition: h264dsp_init.c:49
av_get_cpu_flags
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:103
LF_IFUNC
#define LF_IFUNC(DIR, TYPE, DEPTH, OPT)
Definition: h264dsp_init.c:96
cpu_flags
static atomic_int cpu_flags
Definition: cpu.c:52
IDCT_ADD_FUNC
#define IDCT_ADD_FUNC(NUM, DEPTH, OPT)
Definition: h264dsp_init.c:29
H264_BIWEIGHT_SSE
#define H264_BIWEIGHT_SSE(W)
Definition: h264dsp_init.c:153
av_cold
#define av_cold
Definition: attributes.h:90
field
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this field
Definition: writing_filters.txt:78
h264dsp.h
H264_BIWEIGHT_10_SSE
#define H264_BIWEIGHT_10_SSE(W, DEPTH)
Definition: h264dsp_init.c:180
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
H264DSPContext
Context for storing H.264 DSP functions.
Definition: h264dsp.h:42
cpu.h
H264_BIWEIGHT_MMX
#define H264_BIWEIGHT_MMX(W)
Definition: h264dsp_init.c:149
asm.h
attributes.h
EXTERNAL_SSE2
#define EXTERNAL_SSE2(flags)
Definition: cpu.h:59
input
and forward the test the status of outputs and forward it to the corresponding return FFERROR_NOT_READY If the filters stores internally one or a few frame for some input
Definition: filter_design.txt:172
IDCT_ADD_REP_FUNC2
#define IDCT_ADD_REP_FUNC2(NUM, REP, DEPTH, OPT)
Definition: h264dsp_init.c:65
ff_h264_loop_filter_strength_mmxext
void ff_h264_loop_filter_strength_mmxext(int16_t bS[2][4][4], uint8_t nnz[40], int8_t ref[2][40], int16_t mv[2][40][2], int bidir, int edges, int step, int mask_mv0, int mask_mv1, int field)
ff_h264dsp_init_x86
av_cold void ff_h264dsp_init_x86(H264DSPContext *c, const int bit_depth, const int chroma_format_idc)
Definition: h264dsp_init.c:190
EXTERNAL_AVX
#define EXTERNAL_AVX(flags)
Definition: cpu.h:70
LF_FUNCS
#define LF_FUNCS(type, depth)
Definition: h264dsp_init.c:102
EXTERNAL_SSE4
#define EXTERNAL_SSE4(flags)
Definition: cpu.h:68
ref
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:112
h
h
Definition: vp9dsp_template.c:2038
EXTERNAL_SSSE3
#define EXTERNAL_SSSE3(flags)
Definition: cpu.h:65
EXTERNAL_MMX
#define EXTERNAL_MMX(flags)
Definition: cpu.h:56
EXTERNAL_MMXEXT
#define EXTERNAL_MMXEXT(flags)
Definition: cpu.h:57