A mirror of https://github.com/libressl/openbsd.git https://git.lua4.win/openbsd/atom?h=OPENBSD_7_9_BASE 2024-12-06T11:57:18+00:00 2024-12-06T11:57:18+00:00 jsing 2024-12-06T11:57:18+00:00 urn:sha1:52aaf400e5a619fcab8ae52524e5aaf96e0b0894 This provides a SHA-1 assembly implementation for amd64, which uses the Intel SHA Extensions (aka SHA New Instructions or SHA-NI). This provides a 2-2.5x performance gain on some Intel CPUs and many AMD CPUs. ok tb@ 2024-12-04T13:13:33+00:00 jsing 2024-12-04T13:13:33+00:00 urn:sha1:2de3ee8c5940ebad54feb4303f6fc816daca784b As already done for SHA-256 and SHA-512, replace the perlasm generated SHA-1 assembly implementation with one that is actually readable. Call the assembly implementation from a C wrapper that can, in the future, dispatch to alternate implementations. On a modern CPU the performance is around 5% faster than the base implementation generated by sha1-x86_64.pl, however it is around 15% slower than the excessively complex SSSE2/AVX version that is also generated by the same script (a SHA-NI version will greatly outperform this and is much cleaner/simpler). ok tb@