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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
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  */
19 #include "config.h"
20 #include "libavutil/attributes.h"
21 #include "libavutil/cpu.h"
22 #include "libavutil/x86/cpu.h"
23 #include "libavfilter/af_afir.h"
25 void ff_fcmul_add_sse3(float *sum, const float *t, const float *c,
26  ptrdiff_t len);
27 void ff_fcmul_add_avx(float *sum, const float *t, const float *c,
28  ptrdiff_t len);
31 {
34  if (EXTERNAL_SSE3(cpu_flags)) {
36  }
37  if (EXTERNAL_AVX_FAST(cpu_flags)) {
39  }
40 }
void ff_fcmul_add_avx(float *sum, const float *t, const float *c, ptrdiff_t len)
static atomic_int cpu_flags
Definition: cpu.c:50
Macro definitions for various function/variable attributes.
#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 EXTERNAL_AVX_FAST(flags)
Definition: cpu.h:71
#define EXTERNAL_SSE3(flags)
Definition: cpu.h:62
av_cold void ff_afir_init_x86(AudioFIRDSPContext *s)
Definition: af_afir_init.c:30
#define s(width, name)
Definition: cbs_vp9.c:257
void(* fcmul_add)(float *sum, const float *t, const float *c, ptrdiff_t len)
Definition: af_afir.h:57
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:95
void ff_fcmul_add_sse3(float *sum, const float *t, const float *c, ptrdiff_t len)
int len