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https://opencores.org/ocsvn/apbtoaes128/apbtoaes128/trunk
[/] [apbtoaes128/] [trunk/] [rtl/] [mix_columns.v] - Diff between revs 7 and 14
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Rev 14 |
| Line 114... |
Line 114... |
// Word to Byte transformation
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// Word to Byte transformation
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//=====================================================================================
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//=====================================================================================
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generate
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generate
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genvar i;
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genvar i;
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for(i = 0 ; i < NUM_WORDS; i = i + 1)
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for(i = 0 ; i < NUM_WORDS; i = i + 1)
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begin:WBT
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assign col[i] = mix_in[WORD_SIZE*(i + 1) - 1: WORD_SIZE*i];
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assign col[i] = mix_in[WORD_SIZE*(i + 1) - 1: WORD_SIZE*i];
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end
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endgenerate
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endgenerate
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//=====================================================================================
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//=====================================================================================
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// Direct Mix Column Operation
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// Direct Mix Column Operation
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//=====================================================================================
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//=====================================================================================
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generate
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generate
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genvar j;
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genvar j;
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for(j = 0; j < NUM_WORDS; j = j + 1)
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for(j = 0; j < NUM_WORDS; j = j + 1)
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begin
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begin:DMCO
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assign sum_p[j] = col[(j + 1)%NUM_WORDS] ^ col[(j + 2)%NUM_WORDS] ^ col[(j + 3)%NUM_WORDS];
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assign sum_p[j] = col[(j + 1)%NUM_WORDS] ^ col[(j + 2)%NUM_WORDS] ^ col[(j + 3)%NUM_WORDS];
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assign mix_out_enc[ WORD_SIZE*(j + 1) - 1 : WORD_SIZE*j] = aes_mult_02(col[j] ^ col[(j + NUM_WORDS - 1)%NUM_WORDS]) ^ sum_p[j];
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assign mix_out_enc[ WORD_SIZE*(j + 1) - 1 : WORD_SIZE*j] = aes_mult_02(col[j] ^ col[(j + NUM_WORDS - 1)%NUM_WORDS]) ^ sum_p[j];
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end
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end
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endgenerate
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endgenerate
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