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| -rw-r--r-- | README.md | 19 |
1 files changed, 19 insertions, 0 deletions
@@ -124,3 +124,22 @@ modifying the code yourself. - SHA1DC_CUSTOM_TRAILING_INCLUDE_UBC_CHECK_H Includes a custom trailer in ubc_check.H. + +This code will try to auto-detect certain things based on +CPU/platform. Unless you're running on some really obscure CPU or +porting to a new platform you should not need to tweak this. If you do +please open an issue at +https://github.com/cr-marcstevens/sha1collisiondetection + +- SHA1DC_FORCE_LITTLEENDIAN / SHA1DC_FORCE_BIGENDIAN + + Override the check for processor endianenss and force either + Little-Endian or Big-Endian. + +- SHA1DC_FORCE_UNALIGNED_ACCESS + + Permit unaligned access. This will fail on e.g. SPARC processors, so + it's only permitted on a whitelist of processors. If your CPU isn't + detected as allowing this, and allows unaligned access, setting this + may improve performance (or make it worse, if the kernel has to + catch and emulate such access on its own). |