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-rw-r--r--erts/doc/src/erlang.xml20
1 files changed, 17 insertions, 3 deletions
diff --git a/erts/doc/src/erlang.xml b/erts/doc/src/erlang.xml
index c4751d7463..c95a7005ec 100644
--- a/erts/doc/src/erlang.xml
+++ b/erts/doc/src/erlang.xml
@@ -5850,9 +5850,23 @@ true</pre>
</item>
<tag><c>wordsize</c></tag>
<item>
- <p>Returns the word size in bytes as an integer, i.e. on a
- 32-bit architecture 4 is returned, and on a 64-bit
- architecture 8 is returned.</p>
+ <p>Same as <c>{wordsize, internal}</c></p>
+ </item>
+ <tag><c>{wordsize, internal}</c></tag>
+ <item>
+ <p>Returns the size of Erlang term words in bytes as an
+ integer, i.e. on a 32-bit architecture 4 is returned,
+ and on a pure 64-bit architecture 8 is returned. On a
+ halfword 64-bit emulator, 4 is returned, as the Erlang
+ terms are stored using a virtual wordsize of half the
+ systems wordsize.</p>
+ </item>
+ <tag><c>{wordsize, external}</c></tag>
+ <item>
+ <p>Returns the true wordsize of the emulator, i.e. the size
+ of a pointer, in bytes as an integer. On a pure 32-bit
+ architecture 4 is returned, on both a halfword and pure
+ 64-bit architecture, 8 is returned.</p>
</item>
</taglist>
<note>