85 lines
3.1 KiB
Text
85 lines
3.1 KiB
Text
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// -*- mode:c++ -*-
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// Copyright (c) 2009 The University of Edinburgh
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met: redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer;
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// redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution;
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// neither the name of the copyright holders nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// Authors: Timothy M. Jones
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////////////////////////////////////////////////////////////////////
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//
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// Bitfield definitions.
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//
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// The endianness is the opposite to what's used here, so things
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// are reversed sometimes. Not sure of a fix to this though...
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// Opcode fields
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def bitfield OPCODE <31:26>;
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def bitfield X_XO <10:0>;
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def bitfield XO_XO <10:1>;
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def bitfield A_XO <5:1>;
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// Register fields
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def bitfield RA <20:16>;
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def bitfield RB <15:11>;
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def bitfield RS <25:21>;
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def bitfield RT <25:21>;
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def bitfield FRA <20:16>;
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def bitfield FRB <15:11>;
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def bitfield FRC <10:6>;
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def bitfield FRS <25:21>;
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def bitfield FRT <25:21>;
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// The record bit can be in two positions
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// Used to enable setting of the condition register
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def bitfield RC31 <0>;
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def bitfield RC21 <10>;
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// Used to enable setting of the overflow flags
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def bitfield OE <10>;
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// SPR field for mtspr instruction
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def bitfield SPR <20:11>;
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// FXM field for mtcrf instruction
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def bitfield FXM <19:12>;
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// Branch fields
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def bitfield LK <0>;
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def bitfield AA <1>;
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// Specifies a CR or FPSCR field
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def bitfield BF <25:23>;
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// Fields for FPSCR manipulation instructions
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def bitfield FLM <24:17>;
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def bitfield L <25>;
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def bitfield W <16>;
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// Named so to avoid conflicts with range.hh
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def bitfield U_FIELD <15:12>;
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// Field for specifying a bit in CR or FPSCR
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def bitfield BT <25:21>;
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