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8 Commits

Author SHA1 Message Date
Lasse Collin dfe1710784 liblzma: Silence -Wsign-conversion in SSE2 code in memcmplen.h. 
Thanks to Christian Hesse for reporting the issue.
Fixes: https://github.com/tukaani-project/xz/issues/44
 2023-03-19 22:45:59 +02:00
Lasse Collin c715f683dc liblzma: Fix incorrect #ifdef for x86 SSE2 support. 
__SSE2__ is the correct macro for SSE2 support with GCC, Clang,
and ICC. __SSE2_MATH__ means doing floating point math with SSE2
instead of 387. Often the latter macro is defined if the first
one is but it was still a bug.
 2022-11-11 14:35:58 +02:00
Lasse Collin fae37ad2af tuklib_integer: Add 64-bit endianness-converting reads and writes. 
Also update the comment in liblzma's memcmplen.h.

Thanks to Michał Górny for the original patch for the reads.
 2022-10-05 14:26:00 +03:00
Lasse Collin 7136f1735c Rename unaligned_read32ne to read32ne, and similarly for the others. 2019-12-31 00:47:49 +02:00
Lasse Collin 386394fc9f liblzma: memcmplen: Use ctz32() from tuklib_integer.h. 
The same compiler-specific #ifdefs are already in tuklib_integer.h
 2019-06-01 21:36:13 +03:00
Lasse Collin 33773c6f2a liblzma: Use unaligned_readXXne functions instead of type punning. 
Now gcc -fsanitize=undefined should be clean.

Thanks to Jeffrey Walton.
 2019-06-01 19:01:21 +03:00
Lasse Collin c45757135f liblzma: Set LZMA_MEMCMPLEN_EXTRA depending on the compare method. 2015-01-26 21:24:39 +02:00
Lasse Collin e1c8f1d01f liblzma: Add lzma_memcmplen() for fast memory comparison. 
This commit just adds the function. Its uses will be in
separate commits.

This hasn't been tested much yet and it's perhaps a bit early
to commit it but if there are bugs they should get found quite
quickly.

Thanks to Jun I Jin from Intel for help and for pointing out
that string comparison needs to be optimized in liblzma.
 2014-07-25 20:57:20 +03:00