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Contents of /trunk/Toriya/sbrom12.v
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Revision 118 -
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Wed Apr 11 04:55:06 2007 UTC
(17 years, 1 month ago)
by chapuni
File size: 1543 byte(s)
「本物の鳥屋」ついに公開です。
たぶん 2005/09 頃のものです。
もしかするとあと一度ほど、改良するかもね。
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/**********************************************************-*-verilog-*- |
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* |
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* DES用SBox ROM 1段 |
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* $Id$ |
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* |
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*/ |
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|
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module sbrom12(clk5, |
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e, ln0, ln1, |
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q); |
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|
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input clk5; |
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|
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input [0:47] e; // 拡大転置後の入力値 |
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input [0:31] ln0, ln1; // 逆転置後のL およびその1段遅れ |
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output [0:31] q; // 出力 |
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|
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`include "func_des.v" |
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|
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// RAM に喰わすアドレスなど |
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wire [5:0] e1, e2, e3, e4, e5, e6, e7, e8; |
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assign {e1, e2, e3, e4, e5, e6, e7, e8} = sae(e); |
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|
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wire [3:0] ln01, ln02, ln03, ln04, ln05, ln06, ln07, ln08; |
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assign {ln01, ln02, ln03, ln04, ln05, ln06, ln07, ln08} = ln0; |
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|
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/* |
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* S1-S8(x1) ROM (M512) 出力ラッチなし |
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*/ |
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wire [0:3] q1, q2, q3, q4, q5, q6, q7, q8; |
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srom1x1 sb1({e1, ln01[3]}, clk5, q1); |
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//exemplar attribute sb1 NOOPT TRUE |
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srom2x1 sb2({e2, ln02[3]}, clk5, q2); |
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//exemplar attribute sb2 NOOPT TRUE |
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srom3x1 sb3({e3, ln03[3]}, clk5, q3); |
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//exemplar attribute sb3 NOOPT TRUE |
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srom4x1 sb4({e4, ln04[3]}, clk5, q4); |
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//exemplar attribute sb4 NOOPT TRUE |
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srom5x1 sb5({e5, ln05[3]}, clk5, q5); |
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//exemplar attribute sb5 NOOPT TRUE |
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srom6x1 sb6({e6, ln06[3]}, clk5, q6); |
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//exemplar attribute sb6 NOOPT TRUE |
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srom7x1 sb7({e7, ln07[3]}, clk5, q7); |
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//exemplar attribute sb7 NOOPT TRUE |
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srom8x1 sb8({e8, ln08[3]}, clk5, q8); |
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//exemplar attribute sb8 NOOPT TRUE |
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|
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/* |
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* 出力結果MUX |
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*/ |
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reg [0:31] q; |
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always @(posedge clk5) |
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begin |
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q <= ((ln1 & 32'b0111_0111_0111_0111_0111_0111_0111_0111) |
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^ {q1, q2, q3, q4, q5, q6, q7, q8}); |
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end |
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|
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endmodule |
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|
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/* |
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* Local variables: |
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* tab-width: 4 |
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* End: |
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*/ |
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