Paul Crowley c675b182b3 Transpose the encoding matrix ... Stripe together the encodings from each of the 16 codewords, so that if a 512-byte DRAM line is knocked out, it affects 256 bits from each codeword rather than 4096 bits from a single encoded codeword. Rather than using std::bitset, we directly set and read bits in the std::vector<uint8_t>, because the striping means that copying it will now cost not4k in allocation but 64k. Decode directly to a word, without using list decoding. It seems we don't need list decoding for the error rates that matter here, and we never completed the implementation of it anyway. Declare and test only the full interface, now that it doesn't decompose quite so neatly. Bug: 63928581 Test: atest HadamardTest Change-Id: If022d3f4a8d6fccdf68119d4666f83ce5005bccb		2019-12-20 12:03:21 -08:00
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aidl	Transpose the encoding matrix	2019-12-20 12:03:21 -08:00