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| author | jvoung <jvoung@chromium.org> | 2015-04-08 17:53:30 -0700 |
|---|---|---|
| committer | Commit bot <commit-bot@chromium.org> | 2015-04-09 00:53:58 +0000 |
| commit | 6726704e7ba5b1309ff896be3ad45b8bec092588 (patch) | |
| tree | a10506a2a604b47aafa25ffb53b0e98d1dca2dfa /native_client_sdk/src | |
| parent | f4a6e44ff20c29a6410a698a06a45dd11666ef53 (diff) | |
| download | chromium_src-6726704e7ba5b1309ff896be3ad45b8bec092588.zip chromium_src-6726704e7ba5b1309ff896be3ad45b8bec092588.tar.gz chromium_src-6726704e7ba5b1309ff896be3ad45b8bec092588.tar.bz2 | |
Add PNaCl release note about how to try out Subzero / which flag to set.
BUG= https://code.google.com/p/nativeclient/issues/detail?id=4091
Review URL: https://codereview.chromium.org/1059423002
Cr-Commit-Position: refs/heads/master@{#324321}
Diffstat (limited to 'native_client_sdk/src')
| -rw-r--r-- | native_client_sdk/src/doc/reference/nacl-manifest-format.rst | 2 | ||||
| -rw-r--r-- | native_client_sdk/src/doc/sdk/release-notes.rst | 12 |
2 files changed, 14 insertions, 0 deletions
diff --git a/native_client_sdk/src/doc/reference/nacl-manifest-format.rst b/native_client_sdk/src/doc/reference/nacl-manifest-format.rst index a857998..2df2de1 100644 --- a/native_client_sdk/src/doc/reference/nacl-manifest-format.rst +++ b/native_client_sdk/src/doc/reference/nacl-manifest-format.rst @@ -77,6 +77,8 @@ Example of a ``program`` for Portable Native Client: } } +.. _pnacl_nmf_optlevels: + Portable Native Client applications can also specify an ``optlevel`` field. The ``optlevel`` field is an optimization level *hint*, which is a number (zero and higher). Higher numbers indicate more optimization effort. diff --git a/native_client_sdk/src/doc/sdk/release-notes.rst b/native_client_sdk/src/doc/sdk/release-notes.rst index 3c85e14..4ec487e 100644 --- a/native_client_sdk/src/doc/sdk/release-notes.rst +++ b/native_client_sdk/src/doc/sdk/release-notes.rst @@ -33,8 +33,20 @@ PNaCl deprecated and will be removed in the next release. PNaCl has used libc++ (which is much more up-to-date, currently based on LLVM 3.6) as the default since Pepper 33. +* PNaCl's experimental `Subzero translator`_ is available for x86-32 NaCl in + Chrome version 43, behind a flag. To give it a try, run Chrome with the + ``--enable-pnacl-subzero`` commandline flag, and use the ``optlevel 0`` + :ref:`NaCl manifest option<pnacl_nmf_optlevels>`. Application startup time + should be several times faster than the previous LLVM-based ``optlevel 0`` + mode, with similar code quality. Note that x86-32 NaCl requires a 32-bit + Chrome. On Windows, it also requires a 32-bit Windows OS, but 64-bit Linux + OSes can run x86-32 NaCl. If you try it out, please send us feedback + on `native-client-dev`_. We are working on improvements and adding + new targets. .. _`code generation bug on ARM`: https://code.google.com/p/chromium/issues/detail?id=460432 +.. _`Subzero translator`: https://chromium.googlesource.com/native_client/pnacl-subzero/+/master/README.rst +.. _`native-client-dev`: https://groups.google.com/forum/#!forum/native-client-dev Pepper ------ |