adolphenom
52 lines
2.3 KiB
Java
52 lines
2.3 KiB
Java
package mars.mips.instructions;
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/*
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Copyright (c) 2003-2006, Pete Sanderson and Kenneth Vollmar
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Developed by Pete Sanderson (psanderson@otterbein.edu)
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and Kenneth Vollmar (kenvollmar@missouristate.edu)
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject
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to the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
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ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
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CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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(MIT license, http://www.opensource.org/licenses/mit-license.html)
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*/
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/**
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* These are the MIPS-defined formats of basic machine instructions. The R-format indicates
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* the instruction works only with registers. The I-format indicates the instruction
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* works with an immediate value (e.g. constant). The J-format indicates this is a Jump
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* instruction. The I-branch-format is defined by me, not MIPS, to to indicate this is
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* a Branch instruction, specifically to distinguish immediate
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* values used as target addresses.
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*
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* @author Pete Sanderson
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* @version August 2003
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*/
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public class BasicInstructionFormat {
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public static final BasicInstructionFormat R_FORMAT = new BasicInstructionFormat();
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public static final BasicInstructionFormat I_FORMAT = new BasicInstructionFormat();
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public static final BasicInstructionFormat I_BRANCH_FORMAT = new BasicInstructionFormat();
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public static final BasicInstructionFormat J_FORMAT = new BasicInstructionFormat();
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// private default constructor prevents objects of this class other than those above.
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private BasicInstructionFormat() {
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}
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}
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