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Diffstat (limited to 'src/arch/x86/isa/decoder/decoder.isa')
-rw-r--r-- | src/arch/x86/isa/decoder/decoder.isa | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/src/arch/x86/isa/decoder/decoder.isa b/src/arch/x86/isa/decoder/decoder.isa new file mode 100644 index 000000000..20f31f882 --- /dev/null +++ b/src/arch/x86/isa/decoder/decoder.isa @@ -0,0 +1,89 @@ +// Copyright (c) 2007 The Hewlett-Packard Development Company +// All rights reserved. +// +// Redistribution and use of this software in source and binary forms, +// with or without modification, are permitted provided that the +// following conditions are met: +// +// The software must be used only for Non-Commercial Use which means any +// use which is NOT directed to receiving any direct monetary +// compensation for, or commercial advantage from such use. Illustrative +// examples of non-commercial use are academic research, personal study, +// teaching, education and corporate research & development. +// Illustrative examples of commercial use are distributing products for +// commercial advantage and providing services using the software for +// commercial advantage. +// +// If you wish to use this software or functionality therein that may be +// covered by patents for commercial use, please contact: +// Director of Intellectual Property Licensing +// Office of Strategy and Technology +// Hewlett-Packard Company +// 1501 Page Mill Road +// Palo Alto, California 94304 +// +// Redistributions of source code must retain the above copyright notice, +// this list of conditions and the following disclaimer. Redistributions +// in binary form must reproduce the above copyright notice, this list of +// conditions and the following disclaimer in the documentation and/or +// other materials provided with the distribution. Neither the name of +// the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. No right of +// sublicense is granted herewith. Derivatives of the software and +// output created using the software may be prepared, but only for +// Non-Commercial Uses. Derivatives of the software may be shared with +// others provided: (i) the others agree to abide by the list of +// conditions herein which includes the Non-Commercial Use restrictions; +// and (ii) such Derivatives of the software include the above copyright +// notice to acknowledge the contribution from this software where +// applicable, this list of conditions and the disclaimer below. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +// +// Authors: Gabe Black + +//////////////////////////////////////////////////////////////////// +// +// The actual decoder specification +// + +decode OPCODE_NUM default Unknown::unknown() +{ + 0x0: M5InternalError::error( + {{"Saw an ExtMachInst with zero opcode bytes!"}}); + //1 byte opcodes + ##include "one_byte_opcodes.isa" + //2 byte opcodes + ##include "two_byte_opcodes.isa" + //3 byte opcodes + 0x3: decode OPCODE_PREFIXA { + 0xF0: decode OPCODE_PREFIXB { + //We don't handle these properly in the predecoder yet, so there's + //no reason to implement them for now. + 0x38: decode OPCODE_OP { + default: FailUnimpl::sseThreeEight(); + } + 0x3A: decode OPCODE_OP { + default: FailUnimpl::sseThreeA(); + } + 0xF0: decode OPCODE_OP { + default: FailUnimpl::threednow(); + } + default: M5InternalError::error( + {{"Unexpected second opcode byte in three byte opcode!"}}); + } + default: M5InternalError::error( + {{"Unexpected first opcode byte in three byte opcode!"}}); + } +} |