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* doc/invoke.texi (PowerPC Options): Document 'native' cpu type. 

From-SVN: r257063
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David Edelsohn 2018-01-25 18:25:19 +00:00 committed by David Edelsohn
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commit a7b145f340
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@ -1,3 +1,7 @@
2018-01-25 David Edelsohn <dje.gcc@gmail.com>
* doc/invoke.texi (PowerPC Options): Document 'native' cpu type.
2018-01-25 Jan Hubicka <hubicka@ucw.cz>
PR middle-end/83055

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gcc/doc/invoke.texi
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@ -22333,7 +22333,7 @@ Supported values for @var{cpu_type} are @samp{401}, @samp{403},
@samp{titan}, @samp{power3}, @samp{power4}, @samp{power5}, @samp{power5+},
@samp{power6}, @samp{power6x}, @samp{power7}, @samp{power8},
@samp{power9}, @samp{powerpc}, @samp{powerpc64}, @samp{powerpc64le},
and @samp{rs64}.
@samp{rs64}, and @samp{native}.
@option{-mcpu=powerpc}, @option{-mcpu=powerpc64}, and
@option{-mcpu=powerpc64le} specify pure 32-bit PowerPC (either
@ -22341,6 +22341,12 @@ endian), 64-bit big endian PowerPC and 64-bit little endian PowerPC
architecture machine types, with an appropriate, generic processor
model assumed for scheduling purposes.
Specifying @samp{native} as cpu type detects and selects the
architecture option that corresponds to the host processor of the
system performing the compilation.
@option{-march=native} has no effect if GCC does not recognize the
processor.
The other options specify a specific processor. Code generated under
those options runs best on that processor, and may not run at all on
others.