fastsha256
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Apparently it's the only implementation in Go of sha256 Midstate. We need it in `go-elements` package for generating asset entropy needed by the issued assets. We can use it? Happy...
Are there any benchmarks or comparison to http://www.intel.com/content/www/us/en/intelligent-systems/intel-technology/sha-256-implementations-paper.html Even more interesting: If the INtel code is faster (I assume at least the AVX2 versions are), could it be incorporated?
``` sha256block_amd64.s: Assembler messages: sha256block_amd64.s:53: Error: junk `(SI)' after expression sha256block_amd64.s:53: Error: too many memory references for `mov' sha256block_amd64.s:53: Error: junk at end of line, first unrecognized character is `\'...