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| author | Lasse Collin <lasse.collin@tukaani.org> | 2009-04-13 11:27:40 +0300 |
|---|---|---|
| committer | Lasse Collin <lasse.collin@tukaani.org> | 2009-04-13 11:27:40 +0300 |
| commit | 02ddf09bc3079b3e17297729b9e43f14d407b8fc (patch) | |
| tree | 4a3b92a91c5eacbd7ea6229dd02ffeae6688b02f /src/liblzma/check/crc64_x86.S | |
| parent | Fix off-by-one in LZ decoder. (diff) | |
| download | xz-02ddf09bc3079b3e17297729b9e43f14d407b8fc.tar.xz | |
Put the interesting parts of XZ Utils into the public domain.
Some minor documentation cleanups were made at the same time.
Diffstat (limited to 'src/liblzma/check/crc64_x86.S')
| -rw-r--r-- | src/liblzma/check/crc64_x86.S | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/src/liblzma/check/crc64_x86.S b/src/liblzma/check/crc64_x86.S index 3c25d42d..5e170bc8 100644 --- a/src/liblzma/check/crc64_x86.S +++ b/src/liblzma/check/crc64_x86.S @@ -1,11 +1,14 @@ /* * Speed-optimized CRC64 using slicing-by-four algorithm - * Instruction set: i386 - * Optimized for: i686 * - * This code has been put into the public domain by its authors: - * Igor Pavlov <http://7-zip.org/> - * Lasse Collin <lasse.collin@tukaani.org> + * This uses only i386 instructions, but it is optimized for i686 and later + * (including e.g. Pentium II/III/IV, Athlon XP, and Core 2). + * + * Authors: Igor Pavlov (original CRC32 assembly code) + * Lasse Collin (CRC64 adaptation of the modified CRC32 code) + * + * This file has been put into the public domain. + * You can do whatever you want with this file. * * This code needs lzma_crc64_table, which can be created using the * following C code: @@ -15,6 +18,7 @@ uint64_t lzma_crc64_table[4][256]; void init_table(void) { + // ECMA-182 static const uint64_t poly64 = UINT64_C(0xC96C5795D7870F42); for (size_t s = 0; s < 4; ++s) { |