xz.git - XZ Utils

Age	Commit message (Collapse)	Author	Files	Lines
2023-12-28	liblzma: Use 8-byte method in memcmplen.h on ARM64.	Lasse Collin	1	-8/+10
	It requires fast unaligned access to 64-bit integers and a fast instruction to count leading zeros in a 64-bit integer (__builtin_ctzll()). This perhaps should be enabled on some other archs too. Thanks to Chenxi Mao for the original patch: https://github.com/tukaani-project/xz/pull/75 (the first commit) According to the numbers there, this may improve encoding speed by about 3-5 %. This enables the 8-byte method on MSVC ARM64 too which should work but wasn't tested.
2023-12-28	liblzma: Check also for __clang__ in memcmplen.h.	Lasse Collin	1	-1/+2
	This change hopefully makes no practical difference as Clang likely was detected via __GNUC__ or _MSC_VER already.
2023-10-30	liblzma: Use lzma_always_inline in memcmplen.h.	Lasse Collin	1	-2/+1

2023-09-22	liblzma: Move a few __attribute__ uses in function declarations.	Lasse Collin	1	-1/+2
	The API headers have many attributes but these were left as is for now.
2023-07-18	liblzma: Tweak #if condition in memcmplen.h.	Lasse Collin	1	-2/+2
	Maybe ICC always #defines _MSC_VER on Windows but now it's very clear which code will get used.
2023-07-18	liblzma: Omit unnecessary parenthesis in a preprocessor directive.	Lasse Collin	1	-2/+2

2023-06-28	liblzma: Prevent warning for MSYS2 Windows build.	Jia Tan	1	-2/+4
	In lzma_memcmplen(), the <intrin.h> header file is only included if _MSC_VER and _M_X64 are both defined but _BitScanForward64() was previously used if _M_X64 was defined. GCC for MSYS2 defines _M_X64 but not _MSC_VER so _BitScanForward64() was used without including <intrin.h>. Now, lzma_memcmplen() will use __builtin_ctzll() for MSYS2 GCC builds as expected.
2023-04-19	Windows: Include <intrin.h> when needed.	Jia Tan	1	-0/+10
	Legacy Windows did not need to #include <intrin.h> to use the MSVC intrinsics. Newer versions likely just issue a warning, but the MSVC documentation says to include the header file for the intrinsics we use. GCC and Clang can "pretend" to be MSVC on Windows, so extra checks are needed in tuklib_integer.h to only include <intrin.h> when it will is actually needed.
2023-03-19	liblzma: Silence -Wsign-conversion in SSE2 code in memcmplen.h.	Lasse Collin	1	-1/+2
	Thanks to Christian Hesse for reporting the issue. Fixes: https://github.com/tukaani-project/xz/issues/44
2022-11-11	liblzma: Fix incorrect #ifdef for x86 SSE2 support.	Lasse Collin	1	-2/+1
	__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.
2022-10-05	tuklib_integer: Add 64-bit endianness-converting reads and writes.	Lasse Collin	1	-6/+3
	Also update the comment in liblzma's memcmplen.h. Thanks to Michał Górny for the original patch for the reads.
2019-12-31	Rename unaligned_read32ne to read32ne, and similarly for the others.	Lasse Collin	1	-6/+3

2019-06-01	liblzma: memcmplen: Use ctz32() from tuklib_integer.h.	Lasse Collin	1	-9/+1
	The same compiler-specific #ifdefs are already in tuklib_integer.h
2019-06-01	liblzma: Use unaligned_readXXne functions instead of type punning.	Lasse Collin	1	-6/+6
	Now gcc -fsanitize=undefined should be clean. Thanks to Jeffrey Walton.
2015-01-26	liblzma: Set LZMA_MEMCMPLEN_EXTRA depending on the compare method.	Lasse Collin	1	-5/+10

2014-07-25	liblzma: Add lzma_memcmplen() for fast memory comparison.	Lasse Collin	1	-0/+170
	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.