repo sync | baa3858 | 2013-07-26 17:53:31 -0700 | [diff] [blame] | 1 | /* CpuArch.c -- CPU specific code
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| 2 | 2010-10-26: Igor Pavlov : Public domain */
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| 3 |
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| 4 | #include "CpuArch.h"
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| 5 |
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| 6 | #ifdef MY_CPU_X86_OR_AMD64
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| 7 |
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| 8 | #if (defined(_MSC_VER) && !defined(MY_CPU_AMD64)) || defined(__GNUC__)
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| 9 | #define USE_ASM
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| 10 | #endif
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| 11 |
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| 12 | #if defined(USE_ASM) && !defined(MY_CPU_AMD64)
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| 13 | static UInt32 CheckFlag(UInt32 flag)
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| 14 | {
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| 15 | #ifdef _MSC_VER
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| 16 | __asm pushfd;
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| 17 | __asm pop EAX;
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| 18 | __asm mov EDX, EAX;
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| 19 | __asm xor EAX, flag;
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| 20 | __asm push EAX;
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| 21 | __asm popfd;
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| 22 | __asm pushfd;
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| 23 | __asm pop EAX;
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| 24 | __asm xor EAX, EDX;
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| 25 | __asm push EDX;
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| 26 | __asm popfd;
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| 27 | __asm and flag, EAX;
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| 28 | #else
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| 29 | __asm__ __volatile__ (
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| 30 | "pushf\n\t"
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| 31 | "pop %%EAX\n\t"
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| 32 | "movl %%EAX,%%EDX\n\t"
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| 33 | "xorl %0,%%EAX\n\t"
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| 34 | "push %%EAX\n\t"
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| 35 | "popf\n\t"
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| 36 | "pushf\n\t"
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| 37 | "pop %%EAX\n\t"
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| 38 | "xorl %%EDX,%%EAX\n\t"
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| 39 | "push %%EDX\n\t"
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| 40 | "popf\n\t"
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| 41 | "andl %%EAX, %0\n\t":
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| 42 | "=c" (flag) : "c" (flag));
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| 43 | #endif
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| 44 | return flag;
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| 45 | }
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| 46 | #define CHECK_CPUID_IS_SUPPORTED if (CheckFlag(1 << 18) == 0 || CheckFlag(1 << 21) == 0) return False;
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| 47 | #else
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| 48 | #define CHECK_CPUID_IS_SUPPORTED
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| 49 | #endif
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| 50 |
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| 51 | static void MyCPUID(UInt32 function, UInt32 *a, UInt32 *b, UInt32 *c, UInt32 *d)
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| 52 | {
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| 53 | #ifdef USE_ASM
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| 54 |
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| 55 | #ifdef _MSC_VER
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| 56 |
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| 57 | UInt32 a2, b2, c2, d2;
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| 58 | __asm xor EBX, EBX;
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| 59 | __asm xor ECX, ECX;
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| 60 | __asm xor EDX, EDX;
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| 61 | __asm mov EAX, function;
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| 62 | __asm cpuid;
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| 63 | __asm mov a2, EAX;
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| 64 | __asm mov b2, EBX;
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| 65 | __asm mov c2, ECX;
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| 66 | __asm mov d2, EDX;
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| 67 |
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| 68 | *a = a2;
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| 69 | *b = b2;
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| 70 | *c = c2;
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| 71 | *d = d2;
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| 72 |
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| 73 | #else
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| 74 |
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| 75 | __asm__ __volatile__ (
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| 76 | "cpuid"
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| 77 | : "=a" (*a) ,
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| 78 | "=b" (*b) ,
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| 79 | "=c" (*c) ,
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| 80 | "=d" (*d)
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| 81 | : "0" (function)) ;
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| 82 |
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| 83 | #endif
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| 84 |
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| 85 | #else
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| 86 |
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| 87 | int CPUInfo[4];
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| 88 | __cpuid(CPUInfo, function);
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| 89 | *a = CPUInfo[0];
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| 90 | *b = CPUInfo[1];
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| 91 | *c = CPUInfo[2];
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| 92 | *d = CPUInfo[3];
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| 93 |
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| 94 | #endif
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| 95 | }
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| 96 |
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| 97 | Bool x86cpuid_CheckAndRead(Cx86cpuid *p)
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| 98 | {
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| 99 | CHECK_CPUID_IS_SUPPORTED
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| 100 | MyCPUID(0, &p->maxFunc, &p->vendor[0], &p->vendor[2], &p->vendor[1]);
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| 101 | MyCPUID(1, &p->ver, &p->b, &p->c, &p->d);
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| 102 | return True;
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| 103 | }
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| 104 |
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| 105 | static UInt32 kVendors[][3] =
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| 106 | {
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| 107 | { 0x756E6547, 0x49656E69, 0x6C65746E},
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| 108 | { 0x68747541, 0x69746E65, 0x444D4163},
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| 109 | { 0x746E6543, 0x48727561, 0x736C7561}
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| 110 | };
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| 111 |
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| 112 | int x86cpuid_GetFirm(const Cx86cpuid *p)
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| 113 | {
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| 114 | unsigned i;
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| 115 | for (i = 0; i < sizeof(kVendors) / sizeof(kVendors[i]); i++)
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| 116 | {
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| 117 | const UInt32 *v = kVendors[i];
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| 118 | if (v[0] == p->vendor[0] &&
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| 119 | v[1] == p->vendor[1] &&
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| 120 | v[2] == p->vendor[2])
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| 121 | return (int)i;
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| 122 | }
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| 123 | return -1;
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| 124 | }
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| 125 |
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| 126 | Bool CPU_Is_InOrder()
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| 127 | {
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| 128 | Cx86cpuid p;
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| 129 | int firm;
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| 130 | UInt32 family, model;
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| 131 | if (!x86cpuid_CheckAndRead(&p))
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| 132 | return True;
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| 133 | family = x86cpuid_GetFamily(&p);
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| 134 | model = x86cpuid_GetModel(&p);
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| 135 | firm = x86cpuid_GetFirm(&p);
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| 136 | switch (firm)
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| 137 | {
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| 138 | case CPU_FIRM_INTEL: return (family < 6 || (family == 6 && model == 0x100C));
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| 139 | case CPU_FIRM_AMD: return (family < 5 || (family == 5 && (model < 6 || model == 0xA)));
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| 140 | case CPU_FIRM_VIA: return (family < 6 || (family == 6 && model < 0xF));
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| 141 | }
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| 142 | return True;
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| 143 | }
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| 144 |
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| 145 | #if !defined(MY_CPU_AMD64) && defined(_WIN32)
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| 146 | static Bool CPU_Sys_Is_SSE_Supported()
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| 147 | {
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| 148 | OSVERSIONINFO vi;
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| 149 | vi.dwOSVersionInfoSize = sizeof(vi);
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| 150 | if (!GetVersionEx(&vi))
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| 151 | return False;
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| 152 | return (vi.dwMajorVersion >= 5);
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| 153 | }
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| 154 | #define CHECK_SYS_SSE_SUPPORT if (!CPU_Sys_Is_SSE_Supported()) return False;
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| 155 | #else
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| 156 | #define CHECK_SYS_SSE_SUPPORT
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| 157 | #endif
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| 158 |
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| 159 | Bool CPU_Is_Aes_Supported()
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| 160 | {
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| 161 | Cx86cpuid p;
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| 162 | CHECK_SYS_SSE_SUPPORT
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| 163 | if (!x86cpuid_CheckAndRead(&p))
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| 164 | return False;
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| 165 | return (p.c >> 25) & 1;
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| 166 | }
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| 167 |
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| 168 | #endif
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