1 /* CpuArch.c -- CPU specific code 2 2016-02-25: Igor Pavlov : Public domain */ 3 4 #include "Precomp.h" 5 6 #include "CpuArch.h" 7 8 #ifdef MY_CPU_X86_OR_AMD64 9 10 #if (defined(_MSC_VER) && !defined(MY_CPU_AMD64)) || defined(__GNUC__) 11 #define USE_ASM 12 #endif 13 14 #if !defined(USE_ASM) && _MSC_VER >= 1500 15 #include <intrin.h> 16 #endif 17 18 #if defined(USE_ASM) && !defined(MY_CPU_AMD64) 19 static UInt32 CheckFlag(UInt32 flag) 20 { 21 #ifdef _MSC_VER 22 __asm pushfd; 23 __asm pop EAX; 24 __asm mov EDX, EAX; 25 __asm xor EAX, flag; 26 __asm push EAX; 27 __asm popfd; 28 __asm pushfd; 29 __asm pop EAX; 30 __asm xor EAX, EDX; 31 __asm push EDX; 32 __asm popfd; 33 __asm and flag, EAX; 34 #else 35 __asm__ __volatile__ ( 36 "pushf\n\t" 37 "pop %%EAX\n\t" 38 "movl %%EAX,%%EDX\n\t" 39 "xorl %0,%%EAX\n\t" 40 "push %%EAX\n\t" 41 "popf\n\t" 42 "pushf\n\t" 43 "pop %%EAX\n\t" 44 "xorl %%EDX,%%EAX\n\t" 45 "push %%EDX\n\t" 46 "popf\n\t" 47 "andl %%EAX, %0\n\t": 48 "=c" (flag) : "c" (flag) : 49 "%eax", "%edx"); 50 #endif 51 return flag; 52 } 53 #define CHECK_CPUID_IS_SUPPORTED if (CheckFlag(1 << 18) == 0 || CheckFlag(1 << 21) == 0) return False; 54 #else 55 #define CHECK_CPUID_IS_SUPPORTED 56 #endif 57 58 void MyCPUID(UInt32 function, UInt32 *a, UInt32 *b, UInt32 *c, UInt32 *d) 59 { 60 #ifdef USE_ASM 61 62 #ifdef _MSC_VER 63 64 UInt32 a2, b2, c2, d2; 65 __asm xor EBX, EBX; 66 __asm xor ECX, ECX; 67 __asm xor EDX, EDX; 68 __asm mov EAX, function; 69 __asm cpuid; 70 __asm mov a2, EAX; 71 __asm mov b2, EBX; 72 __asm mov c2, ECX; 73 __asm mov d2, EDX; 74 75 *a = a2; 76 *b = b2; 77 *c = c2; 78 *d = d2; 79 80 #else 81 82 __asm__ __volatile__ ( 83 #if defined(MY_CPU_AMD64) && defined(__PIC__) 84 "mov %%rbx, %%rdi;" 85 "cpuid;" 86 "xchg %%rbx, %%rdi;" 87 : "=a" (*a) , 88 "=D" (*b) , 89 #elif defined(MY_CPU_X86) && defined(__PIC__) 90 "mov %%ebx, %%edi;" 91 "cpuid;" 92 "xchgl %%ebx, %%edi;" 93 : "=a" (*a) , 94 "=D" (*b) , 95 #else 96 "cpuid" 97 : "=a" (*a) , 98 "=b" (*b) , 99 #endif 100 "=c" (*c) , 101 "=d" (*d) 102 : "0" (function)) ; 103 104 #endif 105 106 #else 107 108 int CPUInfo[4]; 109 __cpuid(CPUInfo, function); 110 *a = CPUInfo[0]; 111 *b = CPUInfo[1]; 112 *c = CPUInfo[2]; 113 *d = CPUInfo[3]; 114 115 #endif 116 } 117 118 Bool x86cpuid_CheckAndRead(Cx86cpuid *p) 119 { 120 CHECK_CPUID_IS_SUPPORTED 121 MyCPUID(0, &p->maxFunc, &p->vendor[0], &p->vendor[2], &p->vendor[1]); 122 MyCPUID(1, &p->ver, &p->b, &p->c, &p->d); 123 return True; 124 } 125 126 static const UInt32 kVendors[][3] = 127 { 128 { 0x756E6547, 0x49656E69, 0x6C65746E}, 129 { 0x68747541, 0x69746E65, 0x444D4163}, 130 { 0x746E6543, 0x48727561, 0x736C7561} 131 }; 132 133 int x86cpuid_GetFirm(const Cx86cpuid *p) 134 { 135 unsigned i; 136 for (i = 0; i < sizeof(kVendors) / sizeof(kVendors[i]); i++) 137 { 138 const UInt32 *v = kVendors[i]; 139 if (v[0] == p->vendor[0] && 140 v[1] == p->vendor[1] && 141 v[2] == p->vendor[2]) 142 return (int)i; 143 } 144 return -1; 145 } 146 147 Bool CPU_Is_InOrder() 148 { 149 Cx86cpuid p; 150 int firm; 151 UInt32 family, model; 152 if (!x86cpuid_CheckAndRead(&p)) 153 return True; 154 155 family = x86cpuid_GetFamily(p.ver); 156 model = x86cpuid_GetModel(p.ver); 157 158 firm = x86cpuid_GetFirm(&p); 159 160 switch (firm) 161 { 162 case CPU_FIRM_INTEL: return (family < 6 || (family == 6 && ( 163 /* In-Order Atom CPU */ 164 model == 0x1C /* 45 nm, N4xx, D4xx, N5xx, D5xx, 230, 330 */ 165 || model == 0x26 /* 45 nm, Z6xx */ 166 || model == 0x27 /* 32 nm, Z2460 */ 167 || model == 0x35 /* 32 nm, Z2760 */ 168 || model == 0x36 /* 32 nm, N2xxx, D2xxx */ 169 ))); 170 case CPU_FIRM_AMD: return (family < 5 || (family == 5 && (model < 6 || model == 0xA))); 171 case CPU_FIRM_VIA: return (family < 6 || (family == 6 && model < 0xF)); 172 } 173 return True; 174 } 175 176 #if !defined(MY_CPU_AMD64) && defined(_WIN32) 177 #include <windows.h> 178 static Bool CPU_Sys_Is_SSE_Supported() 179 { 180 OSVERSIONINFO vi; 181 vi.dwOSVersionInfoSize = sizeof(vi); 182 if (!GetVersionEx(&vi)) 183 return False; 184 return (vi.dwMajorVersion >= 5); 185 } 186 #define CHECK_SYS_SSE_SUPPORT if (!CPU_Sys_Is_SSE_Supported()) return False; 187 #else 188 #define CHECK_SYS_SSE_SUPPORT 189 #endif 190 191 Bool CPU_Is_Aes_Supported() 192 { 193 Cx86cpuid p; 194 CHECK_SYS_SSE_SUPPORT 195 if (!x86cpuid_CheckAndRead(&p)) 196 return False; 197 return (p.c >> 25) & 1; 198 } 199 200 #endif 201
