tools/source/misc/cpuid.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  */
  10
  11 #include <tools/cpuid.hxx>
  12 #include <cstdint>
  13
  14 namespace tools
  15 {
  16 namespace cpuid
  17 {
  18
  19 namespace
  20 {
  21 #if defined(_MSC_VER)
  22 #include <intrin.h>
  23 void getCpuId(uint32_t array[4])
  24 {
  25     __cpuid(reinterpret_cast<int*>(array), 1);
  26 }
  27 #else
  28 #if (defined(__i386__) || defined(__x86_64__))
  29 #include <cpuid.h>
  30 void getCpuId(uint32_t array[4])
  31 {
  32     __get_cpuid(1, array + 0, array + 1, array + 2, array + 3);
  33 }
  34 #else
  35 void getCpuId(uint32_t array[4])
  36 {
  37    array[0] = array[1] =  array[2] = array[3] = 0;
  38 }
  39 #endif
  40 #endif
  41 }
  42
  43 #if defined(LO_SSE2_AVAILABLE)
  44
  45 bool hasSSE2()
  46 {
  47     uint32_t cpuInfoArray[] = {0, 0, 0, 0};
  48     getCpuId(cpuInfoArray);
  49     return (cpuInfoArray[3] & (1 << 26)) != 0;
  50 }
  51
  52 #else
  53
  54 bool hasSSE2() { return false; }
  55
  56 #endif
  57
  58 bool hasHyperThreading()
  59 {
  60     uint32_t cpuInfoArray[] = {0, 0, 0, 0};
  61     getCpuId(cpuInfoArray);
  62     return (cpuInfoArray[3] & (1 << 28)) != 0;
  63 }
  64
  65 }
  66 }
  67
  68
  69 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */