• Sami Tolvanen's avatar
    crypto: arm/sha256 - Add optimized SHA-256/224 · f2f770d7
    Sami Tolvanen authored
    Add Andy Polyakov's optimized assembly and NEON implementations for
    SHA-256/224.
    
    The sha256-armv4.pl script for generating the assembly code is from
    OpenSSL commit 51f8d095562f36cdaa6893597b5c609e943b0565.
    
    Compared to sha256-generic these implementations have the following
    tcrypt speed improvements on Motorola Nexus 6 (Snapdragon 805):
    
      bs    b/u      sha256-neon  sha256-asm
      16    16       x1.32        x1.19
      64    16       x1.27        x1.15
      64    64       x1.36        x1.20
      256   16       x1.22        x1.11
      256   64       x1.36        x1.19
      256   256      x1.59        x1.23
      1024  16       x1.21        x1.10
      1024  256      x1.65        x1.23
      1024  1024     x1.76        x1.25
      2048  16       x1.21        x1.10
      2048  256      x1.66        x1.23
      2048  1024     x1.78        x1.25
      2048  2048     x1.79        x1.25
      4096  16       x1.20        x1.09
      4096  256      x1.66        x1.23
      4096  1024     x1.79        x1.26
      4096  4096     x1.82        x1.26
      8192  16       x1.20        x1.09
      8192  256      x1.67        x1.23
      8192  1024     x1.80        x1.26
      8192  4096     x1.85        x1.28
      8192  8192     x1.85        x1.27
    
    Where bs refers to block size and b/u to bytes per update.
    Signed-off-by: default avatarSami Tolvanen <samitolvanen@google.com>
    Cc: Andy Polyakov <appro@openssl.org>
    Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
    f2f770d7
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