src/arch/x86/isa/bitfields.isa

   1 // Copyright (c) 2007 The Hewlett-Packard Development Company
   2 // All rights reserved.
   3 //
   4 // Redistribution and use of this software in source and binary forms,
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   9 // use which is NOT directed to receiving any direct monetary
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  13 // Illustrative examples of commercial use are distributing products for
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  16 //
  17 // If you wish to use this software or functionality therein that may be
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  21 //     Hewlett-Packard Company
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  30 // the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
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  33 // sublicense is granted herewith.  Derivatives of the software and
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  38 // and (ii) such Derivatives of the software include the above copyright
  39 // notice to acknowledge the contribution from this software where
  40 // applicable, this list of conditions and the disclaimer below.
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  42 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  43 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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  48 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  49 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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  52 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  53 //
  54 // Authors: Gabe Black
  55
  56 ////////////////////////////////////////////////////////////////////
  57 //
  58 // Bitfield definitions.
  59 //
  60
  61 //REX prefix
  62 def bitfield REX rex;
  63 def bitfield REX_W rex.w;
  64 def bitfield REX_R rex.r;
  65 def bitfield REX_X rex.x;
  66 def bitfield REX_B rex.b;
  67
  68 //Legacy prefixes
  69 def bitfield LEGACY legacy;
  70 def bitfield LEGACY_REPNE legacy.repne;
  71 def bitfield LEGACY_REP legacy.rep;
  72 def bitfield LEGACY_LOCK legacy.lock;
  73 def bitfield LEGACY_ADDR legacy.addr;
  74 def bitfield LEGACY_OP legacy.op;
  75 def bitfield LEGACY_SEG legacy.seg;
  76
  77 // Pieces of the opcode
  78 def bitfield OPCODE_NUM opcode.num;
  79 def bitfield OPCODE_PREFIXA opcode.prefixA;
  80 def bitfield OPCODE_PREFIXB opcode.prefixB;
  81 def bitfield OPCODE_OP opcode.op;
  82 //The top 5 bits of the opcode tend to split the instructions into groups
  83 def bitfield OPCODE_OP_TOP5 opcode.op.top5;
  84 def bitfield OPCODE_OP_BOTTOM3 opcode.op.bottom3;
  85
  86 // Immediate fields
  87 def bitfield IMMEDIATE immediate;
  88 def bitfield DISPLACEMENT displacement;
  89
  90 //Modifier bytes
  91 def bitfield MODRM modRM;
  92 def bitfield MODRM_MOD modRM.mod;
  93 def bitfield MODRM_REG modRM.reg;
  94 def bitfield MODRM_RM modRM.rm;
  95
  96 def bitfield SIB sib;
  97 def bitfield SIB_SCALE sib.scale;
  98 def bitfield SIB_INDEX sib.index;
  99 def bitfield SIB_BASE sib.base;
 100
 101 def bitfield OPSIZE opSize;
 102 def bitfield ADDRSIZE addrSize;
 103 def bitfield STACKSIZE stackSize;
 104
 105 def bitfield MODE mode;
 106 def bitfield MODE_MODE mode.mode;
 107 def bitfield MODE_SUBMODE mode.submode;