Libav
huffyuvdsp_init.c
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1 /*
2  * Copyright (c) 2009 Loren Merritt <lorenm@u.washington.edu>
3  *
4  * This file is part of Libav.
5  *
6  * Libav 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  * Libav 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 Libav; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include "config.h"
22 #include "libavutil/attributes.h"
23 #include "libavutil/cpu.h"
24 #include "libavutil/x86/asm.h"
25 #include "libavutil/x86/cpu.h"
26 #include "libavcodec/huffyuvdsp.h"
27 
28 void ff_add_hfyu_median_pred_mmxext(uint8_t *dst, const uint8_t *top,
29  const uint8_t *diff, int w,
30  int *left, int *left_top);
31 
32 int ff_add_hfyu_left_pred_ssse3(uint8_t *dst, const uint8_t *src,
33  int w, int left);
34 int ff_add_hfyu_left_pred_sse4(uint8_t *dst, const uint8_t *src,
35  int w, int left);
36 
37 #if HAVE_INLINE_ASM
38 
39 #if HAVE_7REGS
40 static void add_hfyu_median_pred_cmov(uint8_t *dst, const uint8_t *top,
41  const uint8_t *diff, int w,
42  int *left, int *left_top)
43 {
44  x86_reg w2 = -w;
45  x86_reg x;
46  int l = *left & 0xff;
47  int tl = *left_top & 0xff;
48  int t;
49  __asm__ volatile (
50  "mov %7, %3 \n"
51  "1: \n"
52  "movzbl (%3, %4), %2 \n"
53  "mov %2, %k3 \n"
54  "sub %b1, %b3 \n"
55  "add %b0, %b3 \n"
56  "mov %2, %1 \n"
57  "cmp %0, %2 \n"
58  "cmovg %0, %2 \n"
59  "cmovg %1, %0 \n"
60  "cmp %k3, %0 \n"
61  "cmovg %k3, %0 \n"
62  "mov %7, %3 \n"
63  "cmp %2, %0 \n"
64  "cmovl %2, %0 \n"
65  "add (%6, %4), %b0 \n"
66  "mov %b0, (%5, %4) \n"
67  "inc %4 \n"
68  "jl 1b \n"
69  : "+&q"(l), "+&q"(tl), "=&r"(t), "=&q"(x), "+&r"(w2)
70  : "r"(dst + w), "r"(diff + w), "rm"(top + w)
71  );
72  *left = l;
73  *left_top = tl;
74 }
75 #endif /* HAVE_7REGS */
76 
77 static void add_bytes_mmx(uint8_t *dst, uint8_t *src, int w)
78 {
79  x86_reg i = 0;
80 
81  __asm__ volatile (
82  "jmp 2f \n\t"
83  "1: \n\t"
84  "movq (%1, %0), %%mm0 \n\t"
85  "movq (%2, %0), %%mm1 \n\t"
86  "paddb %%mm0, %%mm1 \n\t"
87  "movq %%mm1, (%2, %0) \n\t"
88  "movq 8(%1, %0), %%mm0 \n\t"
89  "movq 8(%2, %0), %%mm1 \n\t"
90  "paddb %%mm0, %%mm1 \n\t"
91  "movq %%mm1, 8(%2, %0) \n\t"
92  "add $16, %0 \n\t"
93  "2: \n\t"
94  "cmp %3, %0 \n\t"
95  "js 1b \n\t"
96  : "+r" (i)
97  : "r" (src), "r" (dst), "r" ((x86_reg) w - 15));
98 
99  for (; i < w; i++)
100  dst[i + 0] += src[i + 0];
101 }
102 
103 #endif /* HAVE_INLINE_ASM */
104 
106 {
107  int cpu_flags = av_get_cpu_flags();
108 
109 #if HAVE_INLINE_ASM
110 #if HAVE_7REGS
111  if (cpu_flags & AV_CPU_FLAG_CMOV)
112  c->add_hfyu_median_pred = add_hfyu_median_pred_cmov;
113 #endif /* HAVE_7REGS */
114 
115  if (INLINE_MMX(cpu_flags))
116  c->add_bytes = add_bytes_mmx;
117 #endif /* HAVE_INLINE_ASM */
118 
119  if (EXTERNAL_MMXEXT(cpu_flags)) {
120  /* slower than cmov version on AMD */
121  if (!(cpu_flags & AV_CPU_FLAG_3DNOW))
123  }
124 
125  if (EXTERNAL_SSSE3(cpu_flags)) {
127  if (cpu_flags & AV_CPU_FLAG_SSE4) // not really SSE4, just slow on Conroe
129  }
130 }
#define AV_CPU_FLAG_CMOV
i686 cmov
Definition: cpu.h:50
void ff_add_hfyu_median_pred_mmxext(uint8_t *dst, const uint8_t *top, const uint8_t *diff, int w, int *left, int *left_top)
Macro definitions for various function/variable attributes.
int ff_add_hfyu_left_pred_sse4(uint8_t *dst, const uint8_t *src, int w, int left)
uint8_t
#define av_cold
Definition: attributes.h:66
int x86_reg
Definition: asm.h:70
av_cold void ff_huffyuvdsp_init_x86(HuffYUVDSPContext *c)
#define INLINE_MMX(flags)
Definition: cpu.h:63
int(* add_hfyu_left_pred)(uint8_t *dst, const uint8_t *src, int w, int left)
Definition: huffyuvdsp.h:30
void(* add_bytes)(uint8_t *dst, uint8_t *src, int w)
Definition: huffyuvdsp.h:25
#define AV_CPU_FLAG_3DNOW
AMD 3DNOW.
Definition: cpu.h:34
#define EXTERNAL_SSSE3(flags)
Definition: cpu.h:52
#define AV_CPU_FLAG_SSE4
Penryn SSE4.1 functions.
Definition: cpu.h:45
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:47
#define EXTERNAL_MMXEXT(flags)
Definition: cpu.h:48
int ff_add_hfyu_left_pred_ssse3(uint8_t *dst, const uint8_t *src, int w, int left)
void(* add_hfyu_median_pred)(uint8_t *dst, const uint8_t *top, const uint8_t *diff, int w, int *left, int *left_top)
Definition: huffyuvdsp.h:27