FFmpeg
lossless_audiodsp_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/cpu.h"
21 #include "libavutil/x86/cpu.h"
23 
24 int32_t ff_scalarproduct_and_madd_int16_mmxext(int16_t *v1, const int16_t *v2,
25  const int16_t *v3,
26  int order, int mul);
27 int32_t ff_scalarproduct_and_madd_int16_sse2(int16_t *v1, const int16_t *v2,
28  const int16_t *v3,
29  int order, int mul);
30 int32_t ff_scalarproduct_and_madd_int16_ssse3(int16_t *v1, const int16_t *v2,
31  const int16_t *v3,
32  int order, int mul);
33 
35  const int16_t *v3,
36  int order, int mul);
37 
39 {
40 #if HAVE_X86ASM
42 
43  if (EXTERNAL_MMXEXT(cpu_flags))
45 
46  if (EXTERNAL_SSE2(cpu_flags))
48 
49  if (EXTERNAL_SSSE3(cpu_flags) &&
50  !(cpu_flags & (AV_CPU_FLAG_SSE42 | AV_CPU_FLAG_3DNOW))) // cachesplit
52 
53  if (EXTERNAL_SSE4(cpu_flags))
55 #endif
56 }
int32_t ff_scalarproduct_and_madd_int32_sse4(int16_t *v1, const int32_t *v2, const int16_t *v3, int order, int mul)
int32_t ff_scalarproduct_and_madd_int16_sse2(int16_t *v1, const int16_t *v2, const int16_t *v3, int order, int mul)
static atomic_int cpu_flags
Definition: cpu.c:50
Macro definitions for various function/variable attributes.
#define EXTERNAL_SSE4(flags)
Definition: cpu.h:68
#define av_cold
Definition: attributes.h:82
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 EXTERNAL_SSE2(flags)
Definition: cpu.h:59
#define AV_CPU_FLAG_SSE42
Nehalem SSE4.2 functions.
Definition: cpu.h:47
int32_t
int32_t(* scalarproduct_and_madd_int16)(int16_t *v1, const int16_t *v2, const int16_t *v3, int len, int mul)
Calculate scalar product of v1 and v2, and v1[i] += v3[i] * mul.
int32_t ff_scalarproduct_and_madd_int16_ssse3(int16_t *v1, const int16_t *v2, const int16_t *v3, int order, int mul)
int32_t(* scalarproduct_and_madd_int32)(int16_t *v1, const int32_t *v2, const int16_t *v3, int len, int mul)
#define AV_CPU_FLAG_3DNOW
AMD 3DNOW.
Definition: cpu.h:34
int32_t ff_scalarproduct_and_madd_int16_mmxext(int16_t *v1, const int16_t *v2, const int16_t *v3, int order, int mul)
#define EXTERNAL_SSSE3(flags)
Definition: cpu.h:65
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:93
av_cold void ff_llauddsp_init_x86(LLAudDSPContext *c)
#define EXTERNAL_MMXEXT(flags)
Definition: cpu.h:57