xz.git - XZ Utils

Age	Commit message (Collapse)	Author	Files	Lines
2014-08-03	liblzma: SHA-256: Optimize the Maj macro slightly.	Lasse Collin	1	-1/+1
	The Maj macro is used where multiple things are added together, so making Maj a sum of two expressions allows some extra freedom for the compiler to schedule the instructions. I learned this trick from <http://www.hackersdelight.org/corres.txt>.
2014-08-03	liblzma: SHA-256: Optimize the way rotations are done.	Lasse Collin	1	-6/+11
	This looks weird because the rotations become sequential, but it helps quite a bit on both 32-bit and 64-bit x86: - It requires fewer instructions on two-operand instruction sets like x86. - It requires one register less which matters especially on 32-bit x86. I hope this doesn't hurt other archs. I didn't invent this idea myself, but I don't remember where I saw it first.
2014-08-03	liblzma: SHA-256: Remove the GCC #pragma that became unneeded.	Lasse Collin	1	-5/+0
	The unrolling in the previous commit should avoid the situation where a compiler may think that an uninitialized variable might be accessed.
2014-08-03	liblzma: SHA-256: Unroll a little more.	Lasse Collin	1	-9/+16
	This way a branch isn't needed for each operation to choose between blk0 and blk2, and still the code doesn't grow as much as it would with full unrolling.
2014-08-03	liblzma: SHA-256: Do the byteswapping without a temporary buffer.	Lasse Collin	1	-12/+1

2014-01-12	liblzma: Remove a useless C99ism from sha256.c.	Lasse Collin	1	-1/+1
	Unsurprisingly it makes no difference in compiled output.
2012-08-24	A few typo fixes to comments and the xz man page.	Lasse Collin	1	-1/+0
	Thanks to Jim Meyering.
2011-04-05	liblzma: Use TUKLIB_GNUC_REQ to check GCC version in sha256.c.	Lasse Collin	1	-3/+3

2009-10-04	Use a tuklib module for integer handling.	Lasse Collin	1	-15/+3
	This replaces bswap.h and integer.h. The tuklib module uses <byteswap.h> on GNU, <sys/endian.h> on *BSDs and <sys/byteorder.h> on Solaris, which may contain optimized code like inline assembly.
2009-05-02	Use a GCC-specific #pragma instead of GCC-specific	Lasse Collin	1	-0/+5
	-Wno-uninitialized to silence a bogus warning.
2009-04-13	Put the interesting parts of XZ Utils into the public domain.	Lasse Collin	1	-9/+14
	Some minor documentation cleanups were made at the same time.
2008-08-28	Sort of garbage collection commit. :-\| Many things are still	Lasse Collin	1	-16/+13
	broken. API has changed a lot and it will still change a little more here and there. The command line tool doesn't have all the required changes to reflect the API changes, so it's easy to get "internal error" or trigger assertions.
2008-06-18	Update the code to mostly match the new simpler file format	Lasse Collin	1	-25/+28
	specification. Simplify things by removing most of the support for known uncompressed size in most places. There are some miscellaneous changes here and there too. The API of liblzma has got many changes and still some more will be done soon. While most of the code has been updated, some things are not fixed (the command line tool will choke with invalid filter chain, if nothing else). Subblock filter is somewhat broken for now. It will be updated once the encoded format of the Subblock filter has been decided.
2007-12-09	Imported to git.	Lasse Collin	1	-0/+203