Difference between pages "Package:Gzip" and "CPU FLAGS"

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{{Ebuild
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This page lists processor instruction sets that can be enabled on Funtoo Linux systems using the {{c|CPU_FLAGS_*}} variables.
|Summary=Gzip is the standard GNU compressor/decompressor, used to create and expand .gz archives.
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|CatPkg=app-arch/gzip
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|Maintainer=Oleg,
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|Repository=Funtoo Overlay
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}}
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Our forked version of Gzip adds a patch to add the <tt>--rsyncable</tt> option, which creates an "rsync-friendly" archive. This option used by <tt>vzdump</tt> utility
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Here is the full description of this option:
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==CPU_FLAGS_X86 ==
  
<blockquote>
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{{TableStart}}
"While compressing, synchronize the output occasionally based on the
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<tr><th>Flag</th><th>Introduced</th><th>Name</th><th></th></tr>
input.  This reduces compression by about 1 percent most cases, but
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<tr><td>{{c|mmx}}</td><td>1997 (Pentium MMX)</td><td>MMX</td><td>See [[Wikipedia:MMX (instruction set)]] </td></tr>
means that the <tt>rsync</tt> program can take advantage of similarities
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<tr><td>{{c|mmxext}}</td><td>1999</td><td>AMD MMX Extensions</td><td>See [[Wikipedia:Extended MMX]]</td></tr>
in the uncompressed input when syncronizing two files compressed with
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<tr><td>{{c|sse}}</td><td>1999 (Pentium III)</td><td>Streaming SIMD Extensions (SSE)</td><td>See [[Wikipedia:Streaming SIMD Extensions]]</td></tr>
this flag.  <tt>gunzip</tt> cannot tell the difference between a
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<tr><td>{{c|sse2}}</td><td>2001 (Pentium 4)</td><td>Streaming SIMD Extensions 2 (SSE2)</td><td>See [[Wikipedia:SSE2]]</td></tr>
compressed file created with this option, and one created without it."
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<tr><td>{{c|sse3}}</td><td>2004 (Pentium 4 Prescott)</td><td>Streaming SIMD Extensions 3 (SSE3/PNI)</td><td>See [[Wikipedia:SSE3]]</td></tr>
</blockquote>
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<tr><td>{{c|ssse3}}</td><td>2006 (Core 2 Woodcrest)</td><td>Supplemental Streaming SIMD Extensions 3 (SSSE3)</td><td>See [[Wikipedia:SSSE3]]</td></tr>
{{EbuildFooter}}
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<tr><td>{{c|popcnt}}</td><td>2007</td><td>POPCNT and LZCNT</td><td>See [[Wikipedia:SSE4#POPCNT_and_LZCNT]]</td></tr>
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{{TableEnd}}

Revision as of 18:55, March 26, 2015

This page lists processor instruction sets that can be enabled on Funtoo Linux systems using the CPU_FLAGS_* variables.

CPU_FLAGS_X86

FlagIntroducedName
mmx1997 (Pentium MMX)MMXSee Wikipedia:MMX (instruction set)
mmxext1999AMD MMX ExtensionsSee Wikipedia:Extended MMX
sse1999 (Pentium III)Streaming SIMD Extensions (SSE)See Wikipedia:Streaming SIMD Extensions
sse22001 (Pentium 4)Streaming SIMD Extensions 2 (SSE2)See Wikipedia:SSE2
sse32004 (Pentium 4 Prescott)Streaming SIMD Extensions 3 (SSE3/PNI)See Wikipedia:SSE3
ssse32006 (Core 2 Woodcrest)Supplemental Streaming SIMD Extensions 3 (SSSE3)See Wikipedia:SSSE3
popcnt2007POPCNT and LZCNTSee Wikipedia:SSE4#POPCNT_and_LZCNT