Merge pull request #461 from negativeExponent/libchdr

[pcsx_rearmed.git] / deps / lzma-16.04 / C / CpuArch.c

/* CpuArch.c -- CPU specific code\r
2016-02-25: Igor Pavlov : Public domain */\r
\r
#include "Precomp.h"\r
\r
#include "CpuArch.h"\r
\r
#ifdef MY_CPU_X86_OR_AMD64\r
\r
#if (defined(_MSC_VER) && !defined(MY_CPU_AMD64)) || defined(__GNUC__)\r
#define USE_ASM\r
#endif\r
\r
#if !defined(USE_ASM) && _MSC_VER >= 1500\r
#include <intrin.h>\r
#endif\r
\r
#if defined(USE_ASM) && !defined(MY_CPU_AMD64)\r
static UInt32 CheckFlag(UInt32 flag)\r
{\r
  #ifdef _MSC_VER\r
  __asm pushfd;\r
  __asm pop EAX;\r
  __asm mov EDX, EAX;\r
  __asm xor EAX, flag;\r
  __asm push EAX;\r
  __asm popfd;\r
  __asm pushfd;\r
  __asm pop EAX;\r
  __asm xor EAX, EDX;\r
  __asm push EDX;\r
  __asm popfd;\r
  __asm and flag, EAX;\r
  #else\r
  __asm__ __volatile__ (\r
    "pushf\n\t"\r
    "pop  %%EAX\n\t"\r
    "movl %%EAX,%%EDX\n\t"\r
    "xorl %0,%%EAX\n\t"\r
    "push %%EAX\n\t"\r
    "popf\n\t"\r
    "pushf\n\t"\r
    "pop  %%EAX\n\t"\r
    "xorl %%EDX,%%EAX\n\t"\r
    "push %%EDX\n\t"\r
    "popf\n\t"\r
    "andl %%EAX, %0\n\t":\r
    "=c" (flag) : "c" (flag) :\r
    "%eax", "%edx");\r
  #endif\r
  return flag;\r
}\r
#define CHECK_CPUID_IS_SUPPORTED if (CheckFlag(1 << 18) == 0 || CheckFlag(1 << 21) == 0) return False;\r
#else\r
#define CHECK_CPUID_IS_SUPPORTED\r
#endif\r
\r
void MyCPUID(UInt32 function, UInt32 *a, UInt32 *b, UInt32 *c, UInt32 *d)\r
{\r
  #ifdef USE_ASM\r
\r
  #ifdef _MSC_VER\r
\r
  UInt32 a2, b2, c2, d2;\r
  __asm xor EBX, EBX;\r
  __asm xor ECX, ECX;\r
  __asm xor EDX, EDX;\r
  __asm mov EAX, function;\r
  __asm cpuid;\r
  __asm mov a2, EAX;\r
  __asm mov b2, EBX;\r
  __asm mov c2, ECX;\r
  __asm mov d2, EDX;\r
\r
  *a = a2;\r
  *b = b2;\r
  *c = c2;\r
  *d = d2;\r
\r
  #else\r
\r
  __asm__ __volatile__ (\r
  #if defined(MY_CPU_AMD64) && defined(__PIC__)\r
    "mov %%rbx, %%rdi;"\r
    "cpuid;"\r
    "xchg %%rbx, %%rdi;"\r
    : "=a" (*a) ,\r
      "=D" (*b) ,\r
  #elif defined(MY_CPU_X86) && defined(__PIC__)\r
    "mov %%ebx, %%edi;"\r
    "cpuid;"\r
    "xchgl %%ebx, %%edi;"\r
    : "=a" (*a) ,\r
      "=D" (*b) ,\r
  #else\r
    "cpuid"\r
    : "=a" (*a) ,\r
      "=b" (*b) ,\r
  #endif\r
      "=c" (*c) ,\r
      "=d" (*d)\r
    : "0" (function)) ;\r
\r
  #endif\r
  \r
  #else\r
\r
  int CPUInfo[4];\r
  __cpuid(CPUInfo, function);\r
  *a = CPUInfo[0];\r
  *b = CPUInfo[1];\r
  *c = CPUInfo[2];\r
  *d = CPUInfo[3];\r
\r
  #endif\r
}\r
\r
Bool x86cpuid_CheckAndRead(Cx86cpuid *p)\r
{\r
  CHECK_CPUID_IS_SUPPORTED\r
  MyCPUID(0, &p->maxFunc, &p->vendor[0], &p->vendor[2], &p->vendor[1]);\r
  MyCPUID(1, &p->ver, &p->b, &p->c, &p->d);\r
  return True;\r
}\r
\r
static const UInt32 kVendors[][3] =\r
{\r
  { 0x756E6547, 0x49656E69, 0x6C65746E},\r
  { 0x68747541, 0x69746E65, 0x444D4163},\r
  { 0x746E6543, 0x48727561, 0x736C7561}\r
};\r
\r
int x86cpuid_GetFirm(const Cx86cpuid *p)\r
{\r
  unsigned i;\r
  for (i = 0; i < sizeof(kVendors) / sizeof(kVendors[i]); i++)\r
  {\r
    const UInt32 *v = kVendors[i];\r
    if (v[0] == p->vendor[0] &&\r
        v[1] == p->vendor[1] &&\r
        v[2] == p->vendor[2])\r
      return (int)i;\r
  }\r
  return -1;\r
}\r
\r
Bool CPU_Is_InOrder()\r
{\r
  Cx86cpuid p;\r
  int firm;\r
  UInt32 family, model;\r
  if (!x86cpuid_CheckAndRead(&p))\r
    return True;\r
\r
  family = x86cpuid_GetFamily(p.ver);\r
  model = x86cpuid_GetModel(p.ver);\r
  \r
  firm = x86cpuid_GetFirm(&p);\r
\r
  switch (firm)\r
  {\r
    case CPU_FIRM_INTEL: return (family < 6 || (family == 6 && (\r
        /* In-Order Atom CPU */\r
           model == 0x1C  /* 45 nm, N4xx, D4xx, N5xx, D5xx, 230, 330 */\r
        || model == 0x26  /* 45 nm, Z6xx */\r
        || model == 0x27  /* 32 nm, Z2460 */\r
        || model == 0x35  /* 32 nm, Z2760 */\r
        || model == 0x36  /* 32 nm, N2xxx, D2xxx */\r
        )));\r
    case CPU_FIRM_AMD: return (family < 5 || (family == 5 && (model < 6 || model == 0xA)));\r
    case CPU_FIRM_VIA: return (family < 6 || (family == 6 && model < 0xF));\r
  }\r
  return True;\r
}\r
\r
#if !defined(MY_CPU_AMD64) && defined(_WIN32)\r
#include <windows.h>\r
static Bool CPU_Sys_Is_SSE_Supported()\r
{\r
#if _MSC_VER >= 1900 && WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)\r
  return True;\r
#else\r
  OSVERSIONINFO vi;\r
  vi.dwOSVersionInfoSize = sizeof(vi);\r
  if (!GetVersionEx(&vi))\r
    return False;\r
  return (vi.dwMajorVersion >= 5);\r
#endif\r
}\r
#define CHECK_SYS_SSE_SUPPORT if (!CPU_Sys_Is_SSE_Supported()) return False;\r
#else\r
#define CHECK_SYS_SSE_SUPPORT\r
#endif\r
\r
Bool CPU_Is_Aes_Supported()\r
{\r
  Cx86cpuid p;\r
  CHECK_SYS_SSE_SUPPORT\r
  if (!x86cpuid_CheckAndRead(&p))\r
    return False;\r
  return (p.c >> 25) & 1;\r
}\r
\r
#endif\r