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homer.hsin |
/*
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* Copyright 2013, Homer Hsing <homer.hsing@gmail.com>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/* round constant */
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module rconst(i, rc);
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input [23:0] i;
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output reg [63:0] rc;
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always @ (i)
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begin
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rc = 0;
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rc[0] = i[0] | i[4] | i[5] | i[6] | i[7] | i[10] | i[12] | i[13] | i[14] | i[15] | i[20] | i[22];
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rc[1] = i[1] | i[2] | i[4] | i[8] | i[11] | i[12] | i[13] | i[15] | i[16] | i[18] | i[19];
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rc[3] = i[2] | i[4] | i[7] | i[8] | i[9] | i[10] | i[11] | i[12] | i[13] | i[14] | i[18] | i[19] | i[23];
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rc[7] = i[1] | i[2] | i[4] | i[6] | i[8] | i[9] | i[12] | i[13] | i[14] | i[17] | i[20] | i[21];
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rc[15] = i[1] | i[2] | i[3] | i[4] | i[6] | i[7] | i[10] | i[12] | i[14] | i[15] | i[16] | i[18] | i[20] | i[21] | i[23];
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rc[31] = i[3] | i[5] | i[6] | i[10] | i[11] | i[12] | i[19] | i[20] | i[22] | i[23];
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rc[63] = i[2] | i[3] | i[6] | i[7] | i[13] | i[14] | i[15] | i[16] | i[17] | i[19] | i[20] | i[21] | i[23];
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end
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endmodule
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