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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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gcc/ChangeLog
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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> 2018-01-25 Jan Hubicka <hubicka@ucw.cz>
PR middle-end/83055 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{titan}, @samp{power3}, @samp{power4}, @samp{power5}, @samp{power5+},
@samp{power6}, @samp{power6x}, @samp{power7}, @samp{power8}, @samp{power6}, @samp{power6x}, @samp{power7}, @samp{power8},
@samp{power9}, @samp{powerpc}, @samp{powerpc64}, @samp{powerpc64le}, @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=powerpc}, @option{-mcpu=powerpc64}, and
@option{-mcpu=powerpc64le} specify pure 32-bit PowerPC (either @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 architecture machine types, with an appropriate, generic processor
model assumed for scheduling purposes. 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 The other options specify a specific processor. Code generated under
those options runs best on that processor, and may not run at all on those options runs best on that processor, and may not run at all on
others. others.