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It's used only for basic bittrees and fixed-size reverse bittree
because those showed a clear benefit on x86-64 with GCC and Clang.
The other methods were more mixed and thus are commented out but
they should be tested on other archs.
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But now it needs one more local variable.
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This adds macros for bittree decoding which prepares the code
for alternative C versions and inline assembly.
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The new "safe" range decoder mode is the same as old range decoder, but
now the default behavior of the range decoder will not check if there is
enough input or output to complete the operation. When the buffers are
close to fully consumed, the "safe" operations must be used instead. This
will improve speed because it will reduce the number of branches needed
for most of the range decoder operations.
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Translations and doc/xz-file-format.txt and doc/lzma-file-format.txt
were not touched.
COPYING.0BSD was added.
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This was done for both internal and API headers.
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It is just to be more pedantic and thus perhaps catch broken
files slightly earlier.
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Some minor documentation cleanups were made at the same time.
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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.
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right shift with as fast version that doesn't need
arithmetic right shift. Removed the related check from
configure.ac.
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five input bytes) from LZMA decoder to range decoder
header. Did the same for decoding of direct bits.
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