1 /* libFLAC - Free Lossless Audio Codec library
2 * Copyright (C) 2001,2002,2003,2004,2005,2006,2007 Josh Coalson
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
8 * - Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * - Neither the name of the Xiph.org Foundation nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
26 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
27 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
29 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 #include "private/cpu.h"
40 #if defined FLAC__CPU_PPC
41 # if !defined FLAC__NO_ASM
42 # if defined FLAC__SYS_DARWIN
43 # include <sys/sysctl.h>
44 # include <mach/mach.h>
45 # include <mach/mach_host.h>
46 # include <mach/host_info.h>
47 # include <mach/machine.h>
48 # ifndef CPU_SUBTYPE_POWERPC_970
49 # define CPU_SUBTYPE_POWERPC_970 ((cpu_subtype_t) 100)
51 # else /* FLAC__SYS_DARWIN */
54 # include <sys/types.h>
55 # include <sys/sysctl.h>
61 static sigjmp_buf jmpbuf;
62 static volatile sig_atomic_t canjump = 0;
64 static void sigill_handler (int sig)
67 signal (sig, SIG_DFL);
71 siglongjmp (jmpbuf, 1);
73 # endif /* FLAC__SYS_DARWIN */
74 # endif /* FLAC__NO_ASM */
75 #endif /* FLAC__CPU_PPC */
77 const unsigned FLAC__CPUINFO_IA32_CPUID_CMOV = 0x00008000;
78 const unsigned FLAC__CPUINFO_IA32_CPUID_MMX = 0x00800000;
79 const unsigned FLAC__CPUINFO_IA32_CPUID_FXSR = 0x01000000;
80 const unsigned FLAC__CPUINFO_IA32_CPUID_SSE = 0x02000000;
81 const unsigned FLAC__CPUINFO_IA32_CPUID_SSE2 = 0x04000000;
83 const unsigned FLAC__CPUINFO_IA32_CPUID_EXTENDED_AMD_3DNOW = 0x80000000;
84 const unsigned FLAC__CPUINFO_IA32_CPUID_EXTENDED_AMD_EXT3DNOW = 0x40000000;
85 const unsigned FLAC__CPUINFO_IA32_CPUID_EXTENDED_AMD_EXTMMX = 0x00400000;
88 void FLAC__cpu_info(FLAC__CPUInfo *info)
91 info->type = FLAC__CPUINFO_TYPE_IA32;
92 #if !defined FLAC__NO_ASM && defined FLAC__HAS_NASM
95 unsigned cpuid = FLAC__cpu_info_asm_ia32();
96 info->data.ia32.cmov = (cpuid & FLAC__CPUINFO_IA32_CPUID_CMOV)? true : false;
97 info->data.ia32.mmx = (cpuid & FLAC__CPUINFO_IA32_CPUID_MMX)? true : false;
98 info->data.ia32.fxsr = (cpuid & FLAC__CPUINFO_IA32_CPUID_FXSR)? true : false;
99 info->data.ia32.sse = (cpuid & FLAC__CPUINFO_IA32_CPUID_SSE)? true : false;
100 info->data.ia32.sse2 = (cpuid & FLAC__CPUINFO_IA32_CPUID_SSE2)? true : false;
103 info->data.ia32.fxsr = info->data.ia32.sse = info->data.ia32.sse2 = false;
104 #elif defined(__FreeBSD__)
105 /* on FreeBSD we can double-check via sysctl whether the OS supports SSE */
108 size_t len = sizeof(sse);
109 if (sysctlbyname("hw.instruction_sse", &sse, &len, NULL, 0) || !sse)
110 info->data.ia32.fxsr = info->data.ia32.sse = info->data.ia32.sse2 = false;
114 #ifdef FLAC__USE_3DNOW
115 cpuid = FLAC__cpu_info_extended_amd_asm_ia32();
116 info->data.ia32._3dnow = (cpuid & FLAC__CPUINFO_IA32_CPUID_EXTENDED_AMD_3DNOW)? true : false;
117 info->data.ia32.ext3dnow = (cpuid & FLAC__CPUINFO_IA32_CPUID_EXTENDED_AMD_EXT3DNOW)? true : false;
118 info->data.ia32.extmmx = (cpuid & FLAC__CPUINFO_IA32_CPUID_EXTENDED_AMD_EXTMMX)? true : false;
120 info->data.ia32._3dnow = info->data.ia32.ext3dnow = info->data.ia32.extmmx = false;
124 info->use_asm = false;
126 #elif defined FLAC__CPU_PPC
127 info->type = FLAC__CPUINFO_TYPE_PPC;
128 #if !defined FLAC__NO_ASM
129 info->use_asm = true;
130 #ifdef FLAC__USE_ALTIVEC
131 #if defined FLAC__SYS_DARWIN
133 int selectors[2] = { CTL_HW, HW_VECTORUNIT };
135 size_t length = sizeof(result);
136 int error = sysctl(selectors, 2, &result, &length, 0, 0);
138 info->data.ppc.altivec = error==0 ? result!=0 : 0;
141 host_basic_info_data_t hostInfo;
142 mach_msg_type_number_t infoCount;
144 infoCount = HOST_BASIC_INFO_COUNT;
145 host_info(mach_host_self(), HOST_BASIC_INFO, (host_info_t)&hostInfo, &infoCount);
147 info->data.ppc.ppc64 = (hostInfo.cpu_type == CPU_TYPE_POWERPC) && (hostInfo.cpu_subtype == CPU_SUBTYPE_POWERPC_970);
149 #else /* FLAC__SYS_DARWIN */
151 /* no Darwin, do it the brute-force way */
152 /* this is borrowed from MPlayer from the libmpeg2 library */
153 info->data.ppc.altivec = 0;
154 info->data.ppc.ppc64 = 0;
156 signal (SIGILL, sigill_handler);
157 if (!sigsetjmp (jmpbuf, 1)) {
162 "vand %%v0, %%v0, %%v0"
167 info->data.ppc.altivec = 1;
170 if (!sigsetjmp (jmpbuf, 1)) {
174 /* PPC64 hardware implements the cntlzd instruction */
175 asm volatile ("cntlzd %0, %1" : "=r" (x) : "r" (x) );
177 info->data.ppc.ppc64 = 1;
179 signal (SIGILL, SIG_DFL);
181 #endif /* FLAC__SYS_DARWIN */
182 #else /* FLAC__USE_ALTIVEC */
183 info->data.ppc.altivec = 0;
184 info->data.ppc.ppc64 = 0;
185 #endif /* FLAC__USE_ALTIVEC */
186 #else /* FLAC__NO_ASM */
187 info->use_asm = false;
188 #endif /* FLAC__NO_ASM */
190 info->type = FLAC__CPUINFO_TYPE_UNKNOWN;
191 info->use_asm = false;