src/arch/x86/isa/bitfields.isa

   1 // Copyright (c) 2007 The Hewlett-Packard Development Company
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   3 //
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   7 // to a hardware implementation of the functionality of the software
   8 // licensed hereunder.  You may use the software subject to the license
   9 // terms below provided that you ensure that this notice is replicated
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  11 // modified or unmodified, in source code or in binary form.
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  13 // Redistribution and use in source and binary forms, with or without
  14 // modification, are permitted provided that the following conditions are
  15 // met: redistributions of source code must retain the above copyright
  16 // notice, this list of conditions and the following disclaimer;
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  20 // neither the name of the copyright holders nor the names of its
  21 // contributors may be used to endorse or promote products derived from
  22 // this software without specific prior written permission.
  23 //
  24 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  25 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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  27 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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  30 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  31 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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  34 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  35 //
  36 // Authors: Gabe Black
  37
  38 ////////////////////////////////////////////////////////////////////
  39 //
  40 // Bitfield definitions.
  41 //
  42
  43 //REX prefix
  44 def bitfield REX rex;
  45 def bitfield REX_PRESENT rex.present;
  46 def bitfield REX_W rex.w;
  47 def bitfield REX_R rex.r;
  48 def bitfield REX_X rex.x;
  49 def bitfield REX_B rex.b;
  50
  51 //Legacy prefixes
  52 def bitfield LEGACY legacy;
  53 def bitfield LEGACY_DECODEVAL legacy.decodeVal;
  54 def bitfield LEGACY_REPNE legacy.repne;
  55 def bitfield LEGACY_REP legacy.rep;
  56 def bitfield LEGACY_LOCK legacy.lock;
  57 def bitfield LEGACY_OP legacy.op;
  58 def bitfield LEGACY_ADDR legacy.addr;
  59 def bitfield LEGACY_SEG legacy.seg;
  60
  61 // Pieces of the opcode
  62 def bitfield OPCODE_NUM opcode.num;
  63 def bitfield OPCODE_PREFIXA opcode.prefixA;
  64 def bitfield OPCODE_PREFIXB opcode.prefixB;
  65 def bitfield OPCODE_OP opcode.op;
  66 //The top 5 bits of the opcode tend to split the instructions into groups
  67 def bitfield OPCODE_OP_TOP5 opcode.op.top5;
  68 def bitfield OPCODE_OP_BOTTOM3 opcode.op.bottom3;
  69
  70 // Immediate fields
  71 def bitfield IMMEDIATE immediate;
  72 def bitfield DISPLACEMENT displacement;
  73
  74 //Modifier bytes
  75 def bitfield MODRM modRM;
  76 def bitfield MODRM_MOD modRM.mod;
  77 def bitfield MODRM_REG modRM.reg;
  78 def bitfield MODRM_RM modRM.rm;
  79
  80 def bitfield SIB sib;
  81 def bitfield SIB_SCALE sib.scale;
  82 def bitfield SIB_INDEX sib.index;
  83 def bitfield SIB_BASE sib.base;
  84
  85 def bitfield OPSIZE opSize;
  86 def bitfield ADDRSIZE addrSize;
  87 def bitfield STACKSIZE stackSize;
  88
  89 def bitfield MODE mode;
  90 def bitfield MODE_MODE mode.mode;
  91 def bitfield MODE_SUBMODE mode.submode;