Change Details

* Benchmark Merkle root computation * Refactor SHA256 code * Specialized double sha256 for 64 byte inputs * Use SHA256D64 in Merkle root computation * 4-way SSE4.1 implementation for double SHA256 on 64-byte inputs * 8-way AVX2 implementation for double SHA256 on 64-byte inputs * [MOVEONLY] Move unused Merkle branch code to tests This is a backport of Core PR13191 Depends on D1844 and D1845

* Benchmark Merkle root computation * Refactor SHA256 code * Specialized double sha256 for 64 byte inputs * Use SHA256D64 in Merkle root computation * 4-way SSE4.1 implementation for double SHA256 on 64-byte inputs * 8-way AVX2 implementation for double SHA256 on 64-byte inputs * [MOVEONLY] Move unused Merkle branch code to tests * Enable double-SHA256-for-64-byte code on 32-bit x86 * For AVX2 code, also check for AVX, XSAVE, and OS support This is a backport of Core PR13191, PR13393 and PR13471 Depends on D1844 and D1845

* Benchmark Merkle root computation * Refactor SHA256 code * Specialized double sha256 for 64 byte inputs * Use SHA256D64 in Merkle root computation * 4-way SSE4.1 implementation for double SHA256 on 64-byte inputs * 8-way AVX2 implementation for double SHA256 on 64-byte inputs * [MOVEONLY] Move unused Merkle branch code to tests * Enable double-SHA256-for-64-byte code on 32-bit x86 * For AVX2 code, also check for AVX, XSAVE, and OS support This is a backport of Core PR13191, PR13393 and PR13471 Depends on D1844 and D1845