cpu.c (5832B)
1 /* libFLAC - Free Lossless Audio Codec library 2 * Copyright (C) 2001,2002,2003,2004,2005 Josh Coalson 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * - Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 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. 14 * 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. 18 * 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. 30 */ 31 32 #include "private/cpu.h" 33 #include <stdlib.h> 34 #include <stdio.h> 35 36 #ifdef HAVE_CONFIG_H 37 #include <config.h> 38 #endif 39 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) 50 #endif 51 #else /* FLAC__SYS_DARWIN */ 52 #include <signal.h> 53 #include <setjmp.h> 54 55 static sigjmp_buf jmpbuf; 56 static volatile sig_atomic_t canjump = 0; 57 58 static void sigill_handler (int sig) 59 { 60 if (!canjump) { 61 signal (sig, SIG_DFL); 62 raise (sig); 63 } 64 canjump = 0; 65 siglongjmp (jmpbuf, 1); 66 } 67 #endif /* FLAC__SYS_DARWIN */ 68 #endif /* FLAC__NO_ASM */ 69 #endif /* FLAC__CPU_PPC */ 70 71 const unsigned FLAC__CPUINFO_IA32_CPUID_CMOV = 0x00008000; 72 const unsigned FLAC__CPUINFO_IA32_CPUID_MMX = 0x00800000; 73 const unsigned FLAC__CPUINFO_IA32_CPUID_FXSR = 0x01000000; 74 const unsigned FLAC__CPUINFO_IA32_CPUID_SSE = 0x02000000; 75 const unsigned FLAC__CPUINFO_IA32_CPUID_SSE2 = 0x04000000; 76 77 const unsigned FLAC__CPUINFO_IA32_CPUID_EXTENDED_AMD_3DNOW = 0x80000000; 78 const unsigned FLAC__CPUINFO_IA32_CPUID_EXTENDED_AMD_EXT3DNOW = 0x40000000; 79 const unsigned FLAC__CPUINFO_IA32_CPUID_EXTENDED_AMD_EXTMMX = 0x00400000; 80 81 82 void FLAC__cpu_info(FLAC__CPUInfo *info) 83 { 84 #ifdef FLAC__CPU_IA32 85 info->type = FLAC__CPUINFO_TYPE_IA32; 86 #if !defined FLAC__NO_ASM && defined FLAC__HAS_NASM 87 info->use_asm = true; 88 { 89 unsigned cpuid = FLAC__cpu_info_asm_ia32(); 90 info->data.ia32.cmov = (cpuid & FLAC__CPUINFO_IA32_CPUID_CMOV)? true : false; 91 info->data.ia32.mmx = (cpuid & FLAC__CPUINFO_IA32_CPUID_MMX)? true : false; 92 info->data.ia32.fxsr = (cpuid & FLAC__CPUINFO_IA32_CPUID_FXSR)? true : false; 93 info->data.ia32.sse = (cpuid & FLAC__CPUINFO_IA32_CPUID_SSE)? true : false; 94 info->data.ia32.sse2 = (cpuid & FLAC__CPUINFO_IA32_CPUID_SSE2)? true : false; 95 96 #ifndef FLAC__SSE_OS 97 info->data.ia32.fxsr = info->data.ia32.sse = info->data.ia32.sse2 = false; 98 #endif 99 100 #ifdef FLAC__USE_3DNOW 101 cpuid = FLAC__cpu_info_extended_amd_asm_ia32(); 102 info->data.ia32._3dnow = (cpuid & FLAC__CPUINFO_IA32_CPUID_EXTENDED_AMD_3DNOW)? true : false; 103 info->data.ia32.ext3dnow = (cpuid & FLAC__CPUINFO_IA32_CPUID_EXTENDED_AMD_EXT3DNOW)? true : false; 104 info->data.ia32.extmmx = (cpuid & FLAC__CPUINFO_IA32_CPUID_EXTENDED_AMD_EXTMMX)? true : false; 105 #else 106 info->data.ia32._3dnow = info->data.ia32.ext3dnow = info->data.ia32.extmmx = false; 107 #endif 108 } 109 #else 110 info->use_asm = false; 111 #endif 112 #elif defined FLAC__CPU_PPC 113 info->type = FLAC__CPUINFO_TYPE_PPC; 114 #if !defined FLAC__NO_ASM 115 info->use_asm = true; 116 #ifdef FLAC__USE_ALTIVEC 117 #if defined FLAC__SYS_DARWIN 118 { 119 int selectors[2] = { CTL_HW, HW_VECTORUNIT }; 120 int result = 0; 121 size_t length = sizeof(result); 122 int error = sysctl(selectors, 2, &result, &length, 0, 0); 123 124 info->data.ppc.altivec = error==0 ? result!=0 : 0; 125 } 126 { 127 host_basic_info_data_t hostInfo; 128 mach_msg_type_number_t infoCount; 129 130 infoCount = HOST_BASIC_INFO_COUNT; 131 host_info(mach_host_self(), HOST_BASIC_INFO, (host_info_t)&hostInfo, &infoCount); 132 133 info->data.ppc.ppc64 = (hostInfo.cpu_type == CPU_TYPE_POWERPC) && (hostInfo.cpu_subtype == CPU_SUBTYPE_POWERPC_970); 134 } 135 #else /* FLAC__SYS_DARWIN */ 136 { 137 /* no Darwin, do it the brute-force way */ 138 /* this is borrowed from MPlayer from the libmpeg2 library */ 139 info->data.ppc.altivec = 0; 140 info->data.ppc.ppc64 = 0; 141 142 signal (SIGILL, sigill_handler); 143 if (!sigsetjmp (jmpbuf, 1)) { 144 canjump = 1; 145 146 asm volatile ( 147 "mtspr 256, %0\n\t" 148 "vand %%v0, %%v0, %%v0" 149 : 150 : "r" (-1) 151 ); 152 153 info->data.ppc.altivec = 1; 154 } 155 canjump = 0; 156 if (!sigsetjmp (jmpbuf, 1)) { 157 int x = 0; 158 canjump = 1; 159 160 /* PPC64 hardware implements the cntlzd instruction */ 161 asm volatile ("cntlzd %0, %1" : "=r" (x) : "r" (x) ); 162 163 info->data.ppc.ppc64 = 1; 164 } 165 signal (SIGILL, SIG_DFL); 166 } 167 #endif /* FLAC__SYS_DARWIN */ 168 #else /* FLAC__USE_ALTIVEC */ 169 info->data.ppc.altivec = 0; 170 info->data.ppc.ppc64 = 0; 171 #endif /* FLAC__USE_ALTIVEC */ 172 #else /* FLAC__NO_ASM */ 173 info->use_asm = false; 174 #endif /* FLAC__NO_ASM */ 175 #else 176 info->type = FLAC__CPUINFO_TYPE_UNKNOWN; 177 info->use_asm = false; 178 #endif 179 }