FFmpeg
mpegvideoencdsp_init.c
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1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * FFmpeg is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 #include "libavutil/attributes.h"
20 #include "libavutil/avassert.h"
21 #include "libavutil/cpu.h"
22 #include "libavutil/x86/cpu.h"
23 #include "libavcodec/avcodec.h"
25 
26 int ff_pix_sum16_mmx(uint8_t *pix, int line_size);
27 int ff_pix_sum16_mmxext(uint8_t *pix, int line_size);
28 int ff_pix_sum16_sse2(uint8_t *pix, int line_size);
29 int ff_pix_sum16_xop(uint8_t *pix, int line_size);
30 int ff_pix_norm1_mmx(uint8_t *pix, int line_size);
31 int ff_pix_norm1_sse2(uint8_t *pix, int line_size);
32 
33 #if HAVE_INLINE_ASM
34 
35 #define PHADDD(a, t) \
36  "movq " #a ", " #t " \n\t" \
37  "psrlq $32, " #a " \n\t" \
38  "paddd " #t ", " #a " \n\t"
39 
40 /*
41  * pmulhw: dst[0 - 15] = (src[0 - 15] * dst[0 - 15])[16 - 31]
42  * pmulhrw: dst[0 - 15] = (src[0 - 15] * dst[0 - 15] + 0x8000)[16 - 31]
43  * pmulhrsw: dst[0 - 15] = (src[0 - 15] * dst[0 - 15] + 0x4000)[15 - 30]
44  */
45 #define PMULHRW(x, y, s, o) \
46  "pmulhw " #s ", " #x " \n\t" \
47  "pmulhw " #s ", " #y " \n\t" \
48  "paddw " #o ", " #x " \n\t" \
49  "paddw " #o ", " #y " \n\t" \
50  "psraw $1, " #x " \n\t" \
51  "psraw $1, " #y " \n\t"
52 #define DEF(x) x ## _mmx
53 #define SET_RND MOVQ_WONE
54 #define SCALE_OFFSET 1
55 
57 
58 #undef DEF
59 #undef SET_RND
60 #undef SCALE_OFFSET
61 #undef PMULHRW
62 
63 #define DEF(x) x ## _3dnow
64 #define SET_RND(x)
65 #define SCALE_OFFSET 0
66 #define PMULHRW(x, y, s, o) \
67  "pmulhrw " #s ", " #x " \n\t" \
68  "pmulhrw " #s ", " #y " \n\t"
69 
71 
72 #undef DEF
73 #undef SET_RND
74 #undef SCALE_OFFSET
75 #undef PMULHRW
76 
77 #if HAVE_SSSE3_INLINE
78 #undef PHADDD
79 #define DEF(x) x ## _ssse3
80 #define SET_RND(x)
81 #define SCALE_OFFSET -1
82 
83 #define PHADDD(a, t) \
84  "pshufw $0x0E, " #a ", " #t " \n\t" \
85  /* faster than phaddd on core2 */ \
86  "paddd " #t ", " #a " \n\t"
87 
88 #define PMULHRW(x, y, s, o) \
89  "pmulhrsw " #s ", " #x " \n\t" \
90  "pmulhrsw " #s ", " #y " \n\t"
91 
93 
94 #undef DEF
95 #undef SET_RND
96 #undef SCALE_OFFSET
97 #undef PMULHRW
98 #undef PHADDD
99 #endif /* HAVE_SSSE3_INLINE */
100 
101 /* Draw the edges of width 'w' of an image of size width, height
102  * this MMX version can only handle w == 8 || w == 16. */
103 static void draw_edges_mmx(uint8_t *buf, int wrap, int width, int height,
104  int w, int h, int sides)
105 {
106  uint8_t *ptr, *last_line;
107  int i;
108 
109  last_line = buf + (height - 1) * wrap;
110  /* left and right */
111  ptr = buf;
112  if (w == 8) {
113  __asm__ volatile (
114  "1: \n\t"
115  "movd (%0), %%mm0 \n\t"
116  "punpcklbw %%mm0, %%mm0 \n\t"
117  "punpcklwd %%mm0, %%mm0 \n\t"
118  "punpckldq %%mm0, %%mm0 \n\t"
119  "movq %%mm0, -8(%0) \n\t"
120  "movq -8(%0, %2), %%mm1 \n\t"
121  "punpckhbw %%mm1, %%mm1 \n\t"
122  "punpckhwd %%mm1, %%mm1 \n\t"
123  "punpckhdq %%mm1, %%mm1 \n\t"
124  "movq %%mm1, (%0, %2) \n\t"
125  "add %1, %0 \n\t"
126  "cmp %3, %0 \n\t"
127  "jb 1b \n\t"
128  : "+r" (ptr)
129  : "r" ((x86_reg) wrap), "r" ((x86_reg) width),
130  "r" (ptr + wrap * height));
131  } else if (w == 16) {
132  __asm__ volatile (
133  "1: \n\t"
134  "movd (%0), %%mm0 \n\t"
135  "punpcklbw %%mm0, %%mm0 \n\t"
136  "punpcklwd %%mm0, %%mm0 \n\t"
137  "punpckldq %%mm0, %%mm0 \n\t"
138  "movq %%mm0, -8(%0) \n\t"
139  "movq %%mm0, -16(%0) \n\t"
140  "movq -8(%0, %2), %%mm1 \n\t"
141  "punpckhbw %%mm1, %%mm1 \n\t"
142  "punpckhwd %%mm1, %%mm1 \n\t"
143  "punpckhdq %%mm1, %%mm1 \n\t"
144  "movq %%mm1, (%0, %2) \n\t"
145  "movq %%mm1, 8(%0, %2) \n\t"
146  "add %1, %0 \n\t"
147  "cmp %3, %0 \n\t"
148  "jb 1b \n\t"
149  : "+r"(ptr)
150  : "r"((x86_reg)wrap), "r"((x86_reg)width), "r"(ptr + wrap * height)
151  );
152  } else {
153  av_assert1(w == 4);
154  __asm__ volatile (
155  "1: \n\t"
156  "movd (%0), %%mm0 \n\t"
157  "punpcklbw %%mm0, %%mm0 \n\t"
158  "punpcklwd %%mm0, %%mm0 \n\t"
159  "movd %%mm0, -4(%0) \n\t"
160  "movd -4(%0, %2), %%mm1 \n\t"
161  "punpcklbw %%mm1, %%mm1 \n\t"
162  "punpckhwd %%mm1, %%mm1 \n\t"
163  "punpckhdq %%mm1, %%mm1 \n\t"
164  "movd %%mm1, (%0, %2) \n\t"
165  "add %1, %0 \n\t"
166  "cmp %3, %0 \n\t"
167  "jb 1b \n\t"
168  : "+r" (ptr)
169  : "r" ((x86_reg) wrap), "r" ((x86_reg) width),
170  "r" (ptr + wrap * height));
171  }
172 
173  /* top and bottom (and hopefully also the corners) */
174  if (sides & EDGE_TOP) {
175  for (i = 0; i < h; i += 4) {
176  ptr = buf - (i + 1) * wrap - w;
177  __asm__ volatile (
178  "1: \n\t"
179  "movq (%1, %0), %%mm0 \n\t"
180  "movq %%mm0, (%0) \n\t"
181  "movq %%mm0, (%0, %2) \n\t"
182  "movq %%mm0, (%0, %2, 2) \n\t"
183  "movq %%mm0, (%0, %3) \n\t"
184  "add $8, %0 \n\t"
185  "cmp %4, %0 \n\t"
186  "jb 1b \n\t"
187  : "+r" (ptr)
188  : "r" ((x86_reg) buf - (x86_reg) ptr - w),
189  "r" ((x86_reg) - wrap), "r" ((x86_reg) - wrap * 3),
190  "r" (ptr + width + 2 * w));
191  }
192  }
193 
194  if (sides & EDGE_BOTTOM) {
195  for (i = 0; i < h; i += 4) {
196  ptr = last_line + (i + 1) * wrap - w;
197  __asm__ volatile (
198  "1: \n\t"
199  "movq (%1, %0), %%mm0 \n\t"
200  "movq %%mm0, (%0) \n\t"
201  "movq %%mm0, (%0, %2) \n\t"
202  "movq %%mm0, (%0, %2, 2) \n\t"
203  "movq %%mm0, (%0, %3) \n\t"
204  "add $8, %0 \n\t"
205  "cmp %4, %0 \n\t"
206  "jb 1b \n\t"
207  : "+r" (ptr)
208  : "r" ((x86_reg) last_line - (x86_reg) ptr - w),
209  "r" ((x86_reg) wrap), "r" ((x86_reg) wrap * 3),
210  "r" (ptr + width + 2 * w));
211  }
212  }
213 }
214 
215 #endif /* HAVE_INLINE_ASM */
216 
218  AVCodecContext *avctx)
219 {
220  int cpu_flags = av_get_cpu_flags();
221 
222 #if ARCH_X86_32
223  if (EXTERNAL_MMX(cpu_flags)) {
226  }
227 
228  if (EXTERNAL_MMXEXT(cpu_flags)) {
230  }
231 #endif
232 
233  if (EXTERNAL_SSE2(cpu_flags)) {
236  }
237 
238  if (EXTERNAL_XOP(cpu_flags)) {
240  }
241 
242 #if HAVE_INLINE_ASM
243 
244  if (INLINE_MMX(cpu_flags)) {
245  if (!(avctx->flags & AV_CODEC_FLAG_BITEXACT)) {
246  c->try_8x8basis = try_8x8basis_mmx;
247  }
248  c->add_8x8basis = add_8x8basis_mmx;
249 
250  if (avctx->bits_per_raw_sample <= 8) {
251  c->draw_edges = draw_edges_mmx;
252  }
253  }
254 
255  if (INLINE_AMD3DNOW(cpu_flags)) {
256  if (!(avctx->flags & AV_CODEC_FLAG_BITEXACT)) {
257  c->try_8x8basis = try_8x8basis_3dnow;
258  }
259  c->add_8x8basis = add_8x8basis_3dnow;
260  }
261 
262 #if HAVE_SSSE3_INLINE
263  if (INLINE_SSSE3(cpu_flags)) {
264  if (!(avctx->flags & AV_CODEC_FLAG_BITEXACT)) {
265  c->try_8x8basis = try_8x8basis_ssse3;
266  }
267  c->add_8x8basis = add_8x8basis_ssse3;
268  }
269 #endif /* HAVE_SSSE3_INLINE */
270 
271 #endif /* HAVE_INLINE_ASM */
272 }
#define EXTERNAL_MMX(flags)
Definition: cpu.h:56
int ff_pix_sum16_mmx(uint8_t *pix, int line_size)
av_cold void ff_mpegvideoencdsp_init_x86(MpegvideoEncDSPContext *c, AVCodecContext *avctx)
static atomic_int cpu_flags
Definition: cpu.c:50
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:1757
#define EDGE_TOP
Macro definitions for various function/variable attributes.
void(* draw_edges)(uint8_t *buf, int wrap, int width, int height, int w, int h, int sides)
uint8_t
#define av_cold
Definition: attributes.h:88
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
#define height
#define EXTERNAL_SSE2(flags)
Definition: cpu.h:59
#define INLINE_MMX(flags)
Definition: cpu.h:86
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:606
#define wrap(func)
Definition: neontest.h:65
simple assert() macros that are a bit more flexible than ISO C assert().
int ff_pix_sum16_sse2(uint8_t *pix, int line_size)
int(* pix_norm1)(uint8_t *pix, int line_size)
int(* pix_sum)(uint8_t *pix, int line_size)
#define INLINE_SSSE3(flags)
Definition: cpu.h:95
int ff_pix_sum16_mmxext(uint8_t *pix, int line_size)
#define AV_CODEC_FLAG_BITEXACT
Use only bitexact stuff (except (I)DCT).
Definition: avcodec.h:333
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
#define INLINE_AMD3DNOW(flags)
Definition: cpu.h:84
#define width
uint8_t w
Definition: llviddspenc.c:38
Libavcodec external API header.
main external API structure.
Definition: avcodec.h:526
void(* add_8x8basis)(int16_t rem[64], int16_t basis[64], int scale)
int(* try_8x8basis)(int16_t rem[64], int16_t weight[64], int16_t basis[64], int scale)
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:95
#define EXTERNAL_MMXEXT(flags)
Definition: cpu.h:57
int ff_pix_norm1_mmx(uint8_t *pix, int line_size)
__asm__(".macro parse_r var r\n\t""\\var = -1\n\t"_IFC_REG(0) _IFC_REG(1) _IFC_REG(2) _IFC_REG(3) _IFC_REG(4) _IFC_REG(5) _IFC_REG(6) _IFC_REG(7) _IFC_REG(8) _IFC_REG(9) _IFC_REG(10) _IFC_REG(11) _IFC_REG(12) _IFC_REG(13) _IFC_REG(14) _IFC_REG(15) _IFC_REG(16) _IFC_REG(17) _IFC_REG(18) _IFC_REG(19) _IFC_REG(20) _IFC_REG(21) _IFC_REG(22) _IFC_REG(23) _IFC_REG(24) _IFC_REG(25) _IFC_REG(26) _IFC_REG(27) _IFC_REG(28) _IFC_REG(29) _IFC_REG(30) _IFC_REG(31)".iflt \\var\n\t"".error \"Unable to parse register name \\r\"\n\t"".endif\n\t"".endm")
int x86_reg
Definition: asm.h:72
int ff_pix_norm1_sse2(uint8_t *pix, int line_size)
#define EDGE_BOTTOM
#define EXTERNAL_XOP(flags)
Definition: cpu.h:73
int ff_pix_sum16_xop(uint8_t *pix, int line_size)
int i
Definition: input.c:407