ncv/nacl_cpuid.h

   1 /*
   2  * Copyright 2008, Google Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met:
   8  *
   9  *     * Redistributions of source code must retain the above copyright
  10  * notice, this list of conditions and the following disclaimer.
  11  *     * Redistributions in binary form must reproduce the above
  12  * copyright notice, this list of conditions and the following disclaimer
  13  * in the documentation and/or other materials provided with the
  14  * distribution.
  15  *     * Neither the name of Google Inc. nor the names of its
  16  * contributors may be used to endorse or promote products derived from
  17  * this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  20  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  22  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  23  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  24  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  25  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  29  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * cpuid.c
  34  * This module provides a simple abstraction for using the CPUID
  35  * instruction to determine instruction set extensions supported by
  36  * the current processor.
  37  */
  38 #ifndef __NACL_CPUID_H__
  39 #define __NACL_CPUID_H__
  40
  41 typedef unsigned char bool;
  42
  43 typedef struct cpu_feature_struct {
  44   bool f_386;  /* a CPU that doesn't have f_386 shouldn't be trusted. */
  45   bool f_x87;
  46   bool f_MMX;
  47   bool f_SSE;
  48   bool f_SSE2;
  49   bool f_SSE3;
  50   bool f_SSSE3;
  51   bool f_SSE41;
  52   bool f_SSE42;
  53   bool f_MOVBE;
  54   bool f_POPCNT;
  55   bool f_CX8;
  56   bool f_CX16;
  57   bool f_CMOV;
  58   bool f_MON;
  59   bool f_FXSR;
  60   bool f_CFLUSH;
  61   bool f_TSC;
  62   /* These instructions are illegal but included for completeness */
  63   bool f_MSR;
  64   bool f_VME;
  65   bool f_PSN;
  66   bool f_VMX;
  67   /* AMD-specific features */
  68   bool f_3DNOW;
  69   bool f_EMMX;
  70   bool f_E3DNOW;
  71   bool f_LZCNT;
  72   bool f_SSE4A;
  73   bool f_LM;
  74   bool f_SVM;
  75 } CPUFeatures;
  76
  77 #define /* static const int */ kCPUIDStringLength 21
  78
  79 /* Fills in cpuf with feature vector for this CPU. */
  80 extern void GetCPUFeatures(CPUFeatures *cpuf);
  81 /* This returns a string of length kCPUIDStringLength */
  82 extern char *GetCPUIDString();
  83
  84 #endif /* __NACL_CPUID_H__ */