/usr/include/hphp/util/cpuid.h is in hhvm-dev 3.21.0+dfsg-2ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 | /*
+----------------------------------------------------------------------+
| HipHop for PHP |
+----------------------------------------------------------------------+
| Copyright (c) 2010-2016 Facebook, Inc. (http://www.facebook.com) |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
*/
#ifndef incl_HPHP_CPUID_H_
#define incl_HPHP_CPUID_H_
namespace HPHP {
enum class ProcessorFamily {
Intel_SandyBridge,
Intel_IvyBridge,
Intel_Haswell,
Intel_Broadwell,
Intel_Skylake,
Unknown,
};
ProcessorFamily getProcessorFamily() {
ProcessorFamily f = ProcessorFamily::Unknown;
#ifdef __x86_64__
#define CPUID_FAMILY(x) ((((x) >> 8) & 0x0F) + (((x) >> 20) & 0xFF))
#define CPUID_MODEL(x) ((((x) >> 4) & 0x0F) | (((x) >> 12) & 0xF0))
unsigned long x;
asm volatile ("cpuid" : "=a"(x): "a"(1) : "ebx", "ecx", "edx");
// This recognizes only certain CPU microarchitecture. Anything predating
// SandyBridge is not recognized. Architecture for mobile processing are not
// recognized (eg. Atom). Any processor newer than Skylake is labeled as
// Skylake.
if (CPUID_FAMILY(x) == 6) {
switch (CPUID_MODEL(x)) {
case 0x2A:
case 0x2D:
f = ProcessorFamily::Intel_SandyBridge;
break;
case 0x3A:
case 0x3E:
f = ProcessorFamily::Intel_IvyBridge;
break;
case 0x3C:
case 0x3F:
case 0x45:
case 0x46:
f = ProcessorFamily::Intel_Haswell;
break;
case 0x3D:
case 0x47:
case 0x4F:
case 0x56:
f = ProcessorFamily::Intel_Broadwell;
break;
default:
if (CPUID_MODEL(x) >= 0x5E) {
// Any newer processors.
f = ProcessorFamily::Intel_Skylake;
}
break;
}
}
#undef CPUID_FAMILY
#undef CPUID_MODEL
#endif
return f;
}
}
#endif
|