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alfik |
/*
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* Copyright (c) 2014, Aleksander Osman
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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 met:
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*
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* * Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (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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module condition(
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input oflag,
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input cflag,
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input sflag,
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input zflag,
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input pflag,
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input [3:0] index,
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output condition
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);
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//------------------------------------------------------------------------------
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assign condition =
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(index[3:0] == 4'd0)? oflag :
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(index[3:0] == 4'd1)? !oflag :
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(index[3:0] == 4'd2)? cflag :
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(index[3:0] == 4'd3)? !cflag :
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(index[3:0] == 4'd4)? zflag :
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(index[3:0] == 4'd5)? !zflag :
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(index[3:0] == 4'd6)? (cflag | zflag) :
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(index[3:0] == 4'd7)? !(cflag | zflag) :
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(index[3:0] == 4'd8)? sflag :
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(index[3:0] == 4'd9)? !sflag :
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(index[3:0] == 4'd10)? pflag :
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(index[3:0] == 4'd11)? !pflag :
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(index[3:0] == 4'd12)? (sflag ^ oflag) :
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(index[3:0] == 4'd13)? !(sflag ^ oflag) :
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(index[3:0] == 4'd14)? ((sflag ^ oflag) | zflag) :
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!((sflag ^ oflag) | zflag);
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endmodule
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