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/* CpuArch.c -- CPU specific code↩
2016-02-25: Igor Pavlov : Public domain */↩
↩
#include "Precomp.h"↩
↩
#include "CpuArch.h"↩
↩
#ifdef MY_CPU_X86_OR_AMD64↩
↩
#if (defined(_MSC_VER) && !defined(MY_CPU_AMD64)) || defined(__GNUC__)↩
#define USE_ASM↩
#endif↩
↩
#if !defined(USE_ASM) && _MSC_VER >= 1500↩
#include <intrin.h>↩
#endif↩
↩
#if defined(USE_ASM) && !defined(MY_CPU_AMD64)↩
static UInt32 CheckFlag(UInt32 flag)↩
{↩
#ifdef _MSC_VER↩
__asm pushfd;↩
__asm pop EAX;↩
__asm mov EDX, EAX;↩
__asm xor EAX, flag;↩
__asm push EAX;↩
__asm popfd;↩
__asm pushfd;↩
__asm pop EAX;↩
__asm xor EAX, EDX;↩
__asm push EDX;↩
__asm popfd;↩
__asm and flag, EAX;↩
#else↩
__asm__ __volatile__ (↩
"pushf\n\t"↩
"pop %%EAX\n\t"↩
"movl %%EAX,%%EDX\n\t"↩
"xorl %0,%%EAX\n\t"↩
"push %%EAX\n\t"↩
"popf\n\t"↩
"pushf\n\t"↩
"pop %%EAX\n\t"↩
"xorl %%EDX,%%EAX\n\t"↩
"push %%EDX\n\t"↩
"popf\n\t"↩
"andl %%EAX, %0\n\t":↩
"=c" (flag) : "c" (flag) :↩
"%eax", "%edx");↩
#endif↩
return flag;↩
}↩
#define CHECK_CPUID_IS_SUPPORTED if (CheckFlag(1 << 18) == 0 || CheckFlag(1 << 21) == 0) return False;↩
#else↩
#define CHECK_CPUID_IS_SUPPORTED↩
#endif↩
↩
void MyCPUID(UInt32 function, UInt32 *a, UInt32 *b, UInt32 *c, UInt32 *d)↩
{↩
#ifdef USE_ASM↩
↩
#ifdef _MSC_VER↩
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UInt32 a2, b2, c2, d2;↩
__asm xor EBX, EBX;↩
__asm xor ECX, ECX;↩
__asm xor EDX, EDX;↩
__asm mov EAX, function;↩
__asm cpuid;↩
__asm mov a2, EAX;↩
__asm mov b2, EBX;↩
__asm mov c2, ECX;↩
__asm mov d2, EDX;↩
↩
*a = a2;↩
*b = b2;↩
*c = c2;↩
*d = d2;↩
↩
#else↩
↩
__asm__ __volatile__ (↩
#if defined(MY_CPU_AMD64) && defined(__PIC__)↩
"mov %%rbx, %%rdi;"↩
"cpuid;"↩
"xchg %%rbx, %%rdi;"↩
: "=a" (*a) ,↩
"=D" (*b) ,↩
#elif defined(MY_CPU_X86) && defined(__PIC__)↩
"mov %%ebx, %%edi;"↩
"cpuid;"↩
"xchgl %%ebx, %%edi;"↩
: "=a" (*a) ,↩
"=D" (*b) ,↩
#else↩
"cpuid"↩
: "=a" (*a) ,↩
"=b" (*b) ,↩
#endif↩
"=c" (*c) ,↩
"=d" (*d)↩
: "0" (function)) ;↩
↩
#endif↩
↩
#else↩
↩
int CPUInfo[4];↩
__cpuid(CPUInfo, function);↩
*a = CPUInfo[0];↩
*b = CPUInfo[1];↩
*c = CPUInfo[2];↩
*d = CPUInfo[3];↩
↩
#endif↩
}↩
↩
Bool x86cpuid_CheckAndRead(Cx86cpuid *p)↩
{↩
CHECK_CPUID_IS_SUPPORTED↩
MyCPUID(0, &p->maxFunc, &p->vendor[0], &p->vendor[2], &p->vendor[1]);↩
MyCPUID(1, &p->ver, &p->b, &p->c, &p->d);↩
return True;↩
}↩
↩
static const UInt32 kVendors[][3] =↩
{↩
{ 0x756E6547, 0x49656E69, 0x6C65746E},↩
{ 0x68747541, 0x69746E65, 0x444D4163},↩
{ 0x746E6543, 0x48727561, 0x736C7561}↩
};↩
↩
int x86cpuid_GetFirm(const Cx86cpuid *p)↩
{↩
unsigned i;↩
for (i = 0; i < sizeof(kVendors) / sizeof(kVendors[i]); i++)↩
{↩
const UInt32 *v = kVendors[i];↩
if (v[0] == p->vendor[0] &&↩
v[1] == p->vendor[1] &&↩
v[2] == p->vendor[2])↩
return (int)i;↩
}↩
return -1;↩
}↩
↩
Bool CPU_Is_InOrder()↩
{↩
Cx86cpuid p;↩
int firm;↩
UInt32 family, model;↩
if (!x86cpuid_CheckAndRead(&p))↩
return True;↩
↩
family = x86cpuid_GetFamily(p.ver);↩
model = x86cpuid_GetModel(p.ver);↩
↩
firm = x86cpuid_GetFirm(&p);↩
↩
switch (firm)↩
{↩
case CPU_FIRM_INTEL: return (family < 6 || (family == 6 && (↩
/* In-Order Atom CPU */↩
model == 0x1C /* 45 nm, N4xx, D4xx, N5xx, D5xx, 230, 330 */↩
|| model == 0x26 /* 45 nm, Z6xx */↩
|| model == 0x27 /* 32 nm, Z2460 */↩
|| model == 0x35 /* 32 nm, Z2760 */↩
|| model == 0x36 /* 32 nm, N2xxx, D2xxx */↩
)));↩
case CPU_FIRM_AMD: return (family < 5 || (family == 5 && (model < 6 || model == 0xA)));↩
case CPU_FIRM_VIA: return (family < 6 || (family == 6 && model < 0xF));↩
}↩
return True;↩
}↩
↩
#if !defined(MY_CPU_AMD64) && defined(_WIN32)↩
#include <windows.h>↩
static Bool CPU_Sys_Is_SSE_Supported()↩
{↩
OSVERSIONINFO vi;↩
vi.dwOSVersionInfoSize = sizeof(vi);↩
if (!GetVersionEx(&vi))↩
return False;↩
return (vi.dwMajorVersion >= 5);↩
}↩
#define CHECK_SYS_SSE_SUPPORT if (!CPU_Sys_Is_SSE_Supported()) return False;↩
#else↩
#define CHECK_SYS_SSE_SUPPORT↩
#endif↩
↩
Bool CPU_Is_Aes_Supported()↩
{↩
Cx86cpuid p;↩
CHECK_SYS_SSE_SUPPORT↩
if (!x86cpuid_CheckAndRead(&p))↩
return False;↩
return (p.c >> 25) & 1;↩
}↩
↩
#endif↩