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doc/go1.21: document GOPPC64=power10 changes 

For #44549

Change-Id: I1af1d4bbd01a4571a32815bfea16bc395524551a
Reviewed-on: https://go-review.googlesource.com/c/go/+/501358
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
Run-TryBot: Paul Murphy <murp@ibm.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Eli Bendersky <eliben@google.com>
This commit is contained in:
Paul E. Murphy 2023-06-07 14:42:51 -05:00 committed by Paul Murphy
parent 8b53c2d2fc
commit e712759914
1 changed files with 16 additions and 0 deletions
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@ -1203,6 +1203,22 @@ Do not send CLs removing the interior tags from such phrases.
need to rename them.
</p>
<h3 id="PPC64">ppc64/ppc64le</h3>
<p><!-- go.dev/issue/44549 -->
On Linux, <code>GOPPC64=power10</code> now generates PC-relative instructions, prefixed
instructions, and other new Power10 instructions. On AIX, <code>GOPPC64=power10</code>
generates Power10 instructions, but does not generate PC-relative instructions.
</p>
<p>
When building position-independent binaries for <code>GOPPC64=power10</code>
<code>GOOS=linux</code> <code>GOARCH=ppc64le</code>, users can expect reduced binary
sizes in most cases, in some cases 3.5%. Position-independent binaries are built for
ppc64le with the following <code>-buildmode</code> values:
<code>c-archive</code>, <code>c-shared</code>, <code>shared</code>, <code>pie</code>, <code>plugin</code>.
</p>
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