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fixed some errors in des helper functions

* functions s1() - s8() returned incorrect slices of the matrix
* function s2() had one incorrect nibble in cause of faulty conversion
master
T. Meissner 12 years ago
parent
commit
08f7c16e5d
1 changed files with 58 additions and 10 deletions
  1. +58
    -10
      des/rtl/verilog/des_pkg.v

+ 58
- 10
des/rtl/verilog/des_pkg.v View File

@ -29,7 +29,7 @@ end
endfunction
function [0:61] ip1 (input [0:63] data);
function [0:31] ip1 (input [0:63] data);
begin
ip1 = {data[56], data[48], data[40], data[32], data[24], data[16], data[ 8], data[0],
data[58], data[50], data[42], data[34], data[26], data[18], data[10], data[2],
@ -69,72 +69,120 @@ endfunction
function [0:3] s1 (input [0:5] data);
reg [0:255] matrix;
integer pos;
integer index;
begin
matrix = 256'hE4D12FB83A6C5907_0F74E2D1A6CB9538_41E8D62BFC973A50_FC8249175B3EA06D;
s1 = matrix[{data[0],data[5]}*16 + data[1:4]];
pos = {data[0], data[5]} * 64 + data[1:4] * 4;
for(index = 0 ; index <= 3; index = index + 1)
begin
s1[index] = matrix[pos + index];
end
end
endfunction
function [0:3] s2 (input [0:5] data);
reg [0:255] matrix;
integer pos;
integer index;
begin
matrix = 256'hF18E6B34972DC05A_3D47F28DC01A69B5_0E7BA4D158C6932F_D8A13F42B67C05E9;
s2 = matrix[{data[0],data[5]}*16 + data[1:4]];
matrix = 256'hF18E6B34972DC05A_3D47F28EC01A69B5_0E7BA4D158C6932F_D8A13F42B67C05E9;
pos = {data[0], data[5]} * 64 + data[1:4] * 4;
for(index = 0 ; index <= 3; index = index + 1)
begin
s2[index] = matrix[pos + index];
end
end
endfunction
function [0:3] s3 (input [0:5] data);
reg [0:255] matrix;
integer pos;
integer index;
begin
matrix = 256'hA09E63F51DC7B428_D709346A285ECBF1_D6498F30B12C5AE7_1AD069874FE3B52C;
s3 = matrix[{data[0],data[5]}*16 + data[1:4]];
pos = {data[0], data[5]} * 64 + data[1:4] * 4;
for(index = 0 ; index <= 3; index = index + 1)
begin
s3[index] = matrix[pos + index];
end
end
endfunction
function [0:3] s4 (input [0:5] data);
reg [0:255] matrix;
integer pos;
integer index;
begin
matrix = 256'h7DE3069A1285BC4F_D8B56F03472C1AE9_A690CB7DF13E5284_3F06A1D8945BC72E;
s4 = matrix[{data[0],data[5]}*16 + data[1:4]];
pos = {data[0], data[5]} * 64 + data[1:4] * 4;
for(index = 0 ; index <= 3; index = index + 1)
begin
s4[index] = matrix[pos + index];
end
end
endfunction
function [0:3] s5 (input [0:5] data);
reg [0:255] matrix;
integer pos;
integer index;
begin
matrix = 256'h2C417AB6853FD0E9_EB2C47D150FA3986_421BAD78F9C5630E_B8C71E2D6F09A453;
s5 = matrix[{data[0],data[5]}*16 + data[1:4]];
pos = {data[0], data[5]} * 64 + data[1:4] * 4;
for(index = 0 ; index <= 3; index = index + 1)
begin
s5[index] = matrix[pos + index];
end
end
endfunction
function [0:3] s6 (input [0:5] data);
reg [0:255] matrix;
integer pos;
integer index;
begin
matrix = 256'hC1AF92680D34E75B_AF427C9561DE0B38_9EF528C3704A1DB6_432C95FABE17608D;
s6 = matrix[{data[0],data[5]}*16 + data[1:4]];
pos = {data[0], data[5]} * 64 + data[1:4] * 4;
for(index = 0 ; index <= 3; index = index + 1)
begin
s6[index] = matrix[pos + index];
end
end
endfunction
function [0:3] s7 (input [0:5] data);
reg [0:255] matrix;
integer pos;
integer index;
begin
matrix = 256'h4B2EF08D3C975A61_D0B7491AE35C2F86_14BDC37EAF680592_6BD814A7950FE23C;
s7 = matrix[{data[0],data[5]}*16 + data[1:4]];
pos = {data[0], data[5]} * 64 + data[1:4] * 4;
for(index = 0 ; index <= 3; index = index + 1)
begin
s7[index] = matrix[pos + index];
end
end
endfunction
function [0:3] s8 (input [0:5] data);
reg [0:255] matrix;
integer pos;
integer index;
begin
matrix = 256'hD2846FB1A93E50C7_1FD8A374C56B0E92_7B419CE206ADF358_21E74A8DFC90356B;
s8 = matrix[{data[0],data[5]}*16 + data[1:4]];
pos = {data[0], data[5]} * 64 + data[1:4] * 4;
for(index = 0 ; index <= 3; index = index + 1)
begin
s8[index] = matrix[pos + index];
end
end
endfunction


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