File: cputest.c

package info (click to toggle)
gavl 1.4.0-5
  • links: PTS, VCS
  • area: main
  • in suites: bullseye, buster, sid
  • size: 14,912 kB
  • sloc: ansic: 437,319; sh: 10,487; makefile: 238
file content (109 lines) | stat: -rw-r--r-- 3,130 bytes parent folder | download | duplicates (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
/*****************************************************************
 * gavl - a general purpose audio/video processing library
 *
 * Copyright (c) 2001 - 2011 Members of the Gmerlin project
 * gmerlin-general@lists.sourceforge.net
 * http://gmerlin.sourceforge.net
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * *****************************************************************/

#include <gavl.h>
#include <config.h>
#include <accel.h>

/*
 *   Test for available CPU extensions
 *   Shamelessly stolen from ffmpeg (ffmpeg.sf.net)
 */

#define ACCEL_GENERIC 0

/*
 *  Wrappers for foreign flag constants
 */

#define MM_MMX      GAVL_ACCEL_MMX
#define MM_MMXEXT   GAVL_ACCEL_MMXEXT
#define MM_SSE      GAVL_ACCEL_SSE
#define MM_SSE2     GAVL_ACCEL_SSE2
#define MM_SSE3     GAVL_ACCEL_SSE3
#define MM_SSSE3    GAVL_ACCEL_SSSE3
#define MM_3DNOW    GAVL_ACCEL_3DNOW
#define MM_3DNOWEXT GAVL_ACCEL_3DNOWEXT

#ifdef ARCH_X86_64
#  define REG_b "rbx"
#  define REG_S "rsi"
#else
#  define REG_b "ebx"
#  define REG_S "esi"
#endif

/* ebx saving is necessary for PIC. gcc seems unable to see it alone */
#define cpuid(index,eax,ebx,ecx,edx)\
    __asm __volatile\
        ("mov %%"REG_b", %%"REG_S"\n\t"\
         "cpuid\n\t"\
         "xchg %%"REG_b", %%"REG_S\
         : "=a" (eax), "=S" (ebx),\
           "=c" (ecx), "=d" (edx)\
         : "0" (index));

/* Function to test if multimedia instructions are supported...  */

int gavl_accel_supported()
  {
#ifdef ARCH_X86
     int rval = 0;
    int eax, ebx, ecx, edx;
    int max_std_level, max_ext_level, std_caps=0, ext_caps=0;

    /* any CPU that can run Debian has CPUID */
    cpuid(0, max_std_level, ebx, ecx, edx);

    if(max_std_level >= 1){
        cpuid(1, eax, ebx, ecx, std_caps);
        if (std_caps & (1<<23))
            rval |= MM_MMX;
        if (std_caps & (1<<25))
            rval |= MM_MMXEXT | MM_SSE;
        if (std_caps & (1<<26))
            rval |= MM_SSE2;
        if (ecx & 1)
            rval |= MM_SSE3;
        if (ecx & 0x00000200 )
          rval |= MM_SSSE3;

    }

    cpuid(0x80000000, max_ext_level, ebx, ecx, edx);

    if(max_ext_level >= 0x80000001){
        cpuid(0x80000001, eax, ebx, ecx, ext_caps);
        if (ext_caps & (1<<31))
            rval |= MM_3DNOW;
        if (ext_caps & (1<<30))
            rval |= MM_3DNOWEXT;
        if (ext_caps & (1<<23))
            rval |= MM_MMX;
        if (ext_caps & (1<<22))
            rval |= MM_MMXEXT;
    }

    return rval|ACCEL_GENERIC;
#else
  return ACCEL_GENERIC;
#endif
  }