* [committed] libstdc++: Document new std::random_device tokens
@ 2022-01-14 10:14 Jonathan Wakely
0 siblings, 0 replies; only message in thread
From: Jonathan Wakely @ 2022-01-14 10:14 UTC (permalink / raw)
To: libstdc++, gcc-patches
Pushed to trunk.
libstdc++-v3/ChangeLog:
* doc/xml/manual/status_cxx2011.xml: Document new tokens
accepted by std::random_device constructor.
* doc/html/manual/status.html: Regenerate.
---
libstdc++-v3/doc/html/manual/status.html | 13 ++++++++
.../doc/xml/manual/status_cxx2011.xml | 30 +++++++++++++++++++
2 files changed, 43 insertions(+)
diff --git a/libstdc++-v3/doc/xml/manual/status_cxx2011.xml b/libstdc++-v3/doc/xml/manual/status_cxx2011.xml
index 88844f8f0cc..1eeb2d1ccd7 100644
--- a/libstdc++-v3/doc/xml/manual/status_cxx2011.xml
+++ b/libstdc++-v3/doc/xml/manual/status_cxx2011.xml
@@ -2720,6 +2720,36 @@ particular release.
the assembler and CPU support the corresponding instruction.
</listitem>
</varlistentry>
+ <varlistentry>
+ <term><literal>"darn"</literal></term>
+ <listitem>
+ Use the Power ISA-3.0 <literal>DARN</literal>
+ ("Deliver A Random Number")
+ instruction to read from an on-chip hardware random number generator.
+ This token is only valid for 64-bit powerpc targets when both
+ the assembler and CPU support the corresponding instruction.
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><literal>"hw"</literal></term>
+ <term><literal>"hardware"</literal></term>
+ <listitem>
+ Use any available CPU
+ instruction to read from an on-chip hardware random number generator.
+ This is equivalent to trying each of the following and using the
+ first that is supported:
+ <literal>"rdseed"</literal>
+ <literal>"rdrand"</literal>
+ <literal>"darn"</literal>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><literal>"arc4random"</literal></term>
+ <term><literal>"getentropy"</literal></term>
+ <listitem>
+ Use the named C library function, if available on the target.
+ </listitem>
+ </varlistentry>
<varlistentry>
<term><literal>"/dev/urandom"</literal></term>
<term><literal>"/dev/random"</literal></term>
--
2.31.1
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