1 /***
2 This file is part of PulseAudio.
3
4 Copyright 2004-2006 Lennart Poettering
5 Copyright 2009 Wim Taymans <wim.taymans@collabora.co.uk>
6
7 PulseAudio is free software; you can redistribute it and/or modify
8 it under the terms of the GNU Lesser General Public License as published
9 by the Free Software Foundation; either version 2.1 of the License,
10 or (at your option) any later version.
11
12 PulseAudio is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 General Public License for more details.
16
17 You should have received a copy of the GNU Lesser General Public License
18 along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
19 ***/
20
21 #ifdef HAVE_CONFIG_H
22 #include <config.h>
23 #endif
24
25 #include <stdint.h>
26
27 #ifdef HAVE_CPUID_H
28 #include <cpuid.h>
29 #endif
30
31 #include <pulsecore/log.h>
32
33 #include "cpu-x86.h"
34
pa_cpu_get_x86_flags(pa_cpu_x86_flag_t * flags)35 void pa_cpu_get_x86_flags(pa_cpu_x86_flag_t *flags) {
36 #if (defined(__i386__) || defined(__amd64__)) && defined(HAVE_CPUID_H)
37 uint32_t eax, ebx, ecx, edx;
38 uint32_t level;
39
40 *flags = 0;
41
42 /* get standard level */
43 if (__get_cpuid(0x00000000, &level, &ebx, &ecx, &edx) == 0)
44 goto finish;
45
46 if (level >= 1) {
47 if (__get_cpuid(0x00000001, &eax, &ebx, &ecx, &edx) == 0)
48 goto finish;
49
50 if (edx & (1<<15))
51 *flags |= PA_CPU_X86_CMOV;
52
53 if (edx & (1<<23))
54 *flags |= PA_CPU_X86_MMX;
55
56 if (edx & (1<<25))
57 *flags |= PA_CPU_X86_SSE;
58
59 if (edx & (1<<26))
60 *flags |= PA_CPU_X86_SSE2;
61
62 if (ecx & (1<<0))
63 *flags |= PA_CPU_X86_SSE3;
64
65 if (ecx & (1<<9))
66 *flags |= PA_CPU_X86_SSSE3;
67
68 if (ecx & (1<<19))
69 *flags |= PA_CPU_X86_SSE4_1;
70
71 if (ecx & (1<<20))
72 *flags |= PA_CPU_X86_SSE4_2;
73 }
74
75 /* get extended level */
76 if (__get_cpuid(0x80000000, &level, &ebx, &ecx, &edx) == 0)
77 goto finish;
78
79 if (level >= 0x80000001) {
80 if (__get_cpuid(0x80000001, &eax, &ebx, &ecx, &edx) == 0)
81 goto finish;
82
83 if (edx & (1<<22))
84 *flags |= PA_CPU_X86_MMXEXT;
85
86 if (edx & (1<<23))
87 *flags |= PA_CPU_X86_MMX;
88
89 if (edx & (1<<30))
90 *flags |= PA_CPU_X86_3DNOWEXT;
91
92 if (edx & (1<<31))
93 *flags |= PA_CPU_X86_3DNOW;
94 }
95
96 finish:
97 pa_log_info("CPU flags: %s%s%s%s%s%s%s%s%s%s%s",
98 (*flags & PA_CPU_X86_CMOV) ? "CMOV " : "",
99 (*flags & PA_CPU_X86_MMX) ? "MMX " : "",
100 (*flags & PA_CPU_X86_SSE) ? "SSE " : "",
101 (*flags & PA_CPU_X86_SSE2) ? "SSE2 " : "",
102 (*flags & PA_CPU_X86_SSE3) ? "SSE3 " : "",
103 (*flags & PA_CPU_X86_SSSE3) ? "SSSE3 " : "",
104 (*flags & PA_CPU_X86_SSE4_1) ? "SSE4_1 " : "",
105 (*flags & PA_CPU_X86_SSE4_2) ? "SSE4_2 " : "",
106 (*flags & PA_CPU_X86_MMXEXT) ? "MMXEXT " : "",
107 (*flags & PA_CPU_X86_3DNOW) ? "3DNOW " : "",
108 (*flags & PA_CPU_X86_3DNOWEXT) ? "3DNOWEXT " : "");
109 #endif /* (defined(__i386__) || defined(__amd64__)) && defined(HAVE_CPUID_H) */
110 }
111
pa_cpu_init_x86(pa_cpu_x86_flag_t * flags)112 bool pa_cpu_init_x86(pa_cpu_x86_flag_t *flags) {
113 #if defined (__i386__) || defined (__amd64__)
114 pa_cpu_get_x86_flags(flags);
115
116 /* activate various optimisations */
117 if (*flags & PA_CPU_X86_MMX) {
118 pa_volume_func_init_mmx(*flags);
119 pa_remap_func_init_mmx(*flags);
120 }
121
122 if (*flags & (PA_CPU_X86_SSE | PA_CPU_X86_SSE2)) {
123 pa_volume_func_init_sse(*flags);
124 pa_remap_func_init_sse(*flags);
125 pa_convert_func_init_sse(*flags);
126 }
127
128 return true;
129 #else /* defined (__i386__) || defined (__amd64__) */
130 return false;
131 #endif /* defined (__i386__) || defined (__amd64__) */
132 }
133