third_party/tcmalloc/chromium/src/windows/ia32_modrm_map.cc

   1 /* Copyright (c) 2007, Google Inc.
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  29  *
  30  * ---
  31  * Author: Joi Sigurdsson
  32  *
  33  * Table of relevant information about how to decode the ModR/M byte.
  34  * Based on information in the IA-32 Intel® Architecture
  35  * Software Developer's Manual Volume 2: Instruction Set Reference.
  36  */
  37
  38 #include "mini_disassembler.h"
  39 #include "mini_disassembler_types.h"
  40
  41 namespace sidestep {
  42
  43 const ModrmEntry MiniDisassembler::s_ia16_modrm_map_[] = {
  44 // mod == 00
  45   /* r/m == 000 */ { false, false, OS_ZERO },
  46   /* r/m == 001 */ { false, false, OS_ZERO },
  47   /* r/m == 010 */ { false, false, OS_ZERO },
  48   /* r/m == 011 */ { false, false, OS_ZERO },
  49   /* r/m == 100 */ { false, false, OS_ZERO },
  50   /* r/m == 101 */ { false, false, OS_ZERO },
  51   /* r/m == 110 */ { true, false, OS_WORD },
  52   /* r/m == 111 */ { false, false, OS_ZERO },
  53 // mod == 01
  54   /* r/m == 000 */ { true, false, OS_BYTE },
  55   /* r/m == 001 */ { true, false, OS_BYTE },
  56   /* r/m == 010 */ { true, false, OS_BYTE },
  57   /* r/m == 011 */ { true, false, OS_BYTE },
  58   /* r/m == 100 */ { true, false, OS_BYTE },
  59   /* r/m == 101 */ { true, false, OS_BYTE },
  60   /* r/m == 110 */ { true, false, OS_BYTE },
  61   /* r/m == 111 */ { true, false, OS_BYTE },
  62 // mod == 10
  63   /* r/m == 000 */ { true, false, OS_WORD },
  64   /* r/m == 001 */ { true, false, OS_WORD },
  65   /* r/m == 010 */ { true, false, OS_WORD },
  66   /* r/m == 011 */ { true, false, OS_WORD },
  67   /* r/m == 100 */ { true, false, OS_WORD },
  68   /* r/m == 101 */ { true, false, OS_WORD },
  69   /* r/m == 110 */ { true, false, OS_WORD },
  70   /* r/m == 111 */ { true, false, OS_WORD },
  71 // mod == 11
  72   /* r/m == 000 */ { false, false, OS_ZERO },
  73   /* r/m == 001 */ { false, false, OS_ZERO },
  74   /* r/m == 010 */ { false, false, OS_ZERO },
  75   /* r/m == 011 */ { false, false, OS_ZERO },
  76   /* r/m == 100 */ { false, false, OS_ZERO },
  77   /* r/m == 101 */ { false, false, OS_ZERO },
  78   /* r/m == 110 */ { false, false, OS_ZERO },
  79   /* r/m == 111 */ { false, false, OS_ZERO }
  80 };
  81
  82 const ModrmEntry MiniDisassembler::s_ia32_modrm_map_[] = {
  83 // mod == 00
  84   /* r/m == 000 */ { false, false, OS_ZERO },
  85   /* r/m == 001 */ { false, false, OS_ZERO },
  86   /* r/m == 010 */ { false, false, OS_ZERO },
  87   /* r/m == 011 */ { false, false, OS_ZERO },
  88   /* r/m == 100 */ { false, true, OS_ZERO },
  89   /* r/m == 101 */ { true, false, OS_DOUBLE_WORD },
  90   /* r/m == 110 */ { false, false, OS_ZERO },
  91   /* r/m == 111 */ { false, false, OS_ZERO },
  92 // mod == 01
  93   /* r/m == 000 */ { true, false, OS_BYTE },
  94   /* r/m == 001 */ { true, false, OS_BYTE },
  95   /* r/m == 010 */ { true, false, OS_BYTE },
  96   /* r/m == 011 */ { true, false, OS_BYTE },
  97   /* r/m == 100 */ { true, true, OS_BYTE },
  98   /* r/m == 101 */ { true, false, OS_BYTE },
  99   /* r/m == 110 */ { true, false, OS_BYTE },
 100   /* r/m == 111 */ { true, false, OS_BYTE },
 101 // mod == 10
 102   /* r/m == 000 */ { true, false, OS_DOUBLE_WORD },
 103   /* r/m == 001 */ { true, false, OS_DOUBLE_WORD },
 104   /* r/m == 010 */ { true, false, OS_DOUBLE_WORD },
 105   /* r/m == 011 */ { true, false, OS_DOUBLE_WORD },
 106   /* r/m == 100 */ { true, true, OS_DOUBLE_WORD },
 107   /* r/m == 101 */ { true, false, OS_DOUBLE_WORD },
 108   /* r/m == 110 */ { true, false, OS_DOUBLE_WORD },
 109   /* r/m == 111 */ { true, false, OS_DOUBLE_WORD },
 110 // mod == 11
 111   /* r/m == 000 */ { false, false, OS_ZERO },
 112   /* r/m == 001 */ { false, false, OS_ZERO },
 113   /* r/m == 010 */ { false, false, OS_ZERO },
 114   /* r/m == 011 */ { false, false, OS_ZERO },
 115   /* r/m == 100 */ { false, false, OS_ZERO },
 116   /* r/m == 101 */ { false, false, OS_ZERO },
 117   /* r/m == 110 */ { false, false, OS_ZERO },
 118   /* r/m == 111 */ { false, false, OS_ZERO },
 119 };
 120
 121 };  // namespace sidestep