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| author | eliben@chromium.org <eliben@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> | 2013-10-15 16:08:46 +0000 |
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| committer | eliben@chromium.org <eliben@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> | 2013-10-15 16:08:46 +0000 |
| commit | 0c4812e97824c6dcabc3bd2eebc58d634e4eb83f (patch) | |
| tree | 1f699d0287c1c5b8da34fc4b16d53bde86391dd9 /native_client_sdk | |
| parent | d41d7cb96d3fa45b3bd76a8a3b1c1e7bd01f0ce0 (diff) | |
| download | chromium_src-0c4812e97824c6dcabc3bd2eebc58d634e4eb83f.zip chromium_src-0c4812e97824c6dcabc3bd2eebc58d634e4eb83f.tar.gz chromium_src-0c4812e97824c6dcabc3bd2eebc58d634e4eb83f.tar.bz2 | |
Mention the ILP32 & floating point data model of PNaCl in the bitcode ref.
BUG=None
R=jfb@chromium.org
Review URL: https://codereview.chromium.org/27190005
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@228696 0039d316-1c4b-4281-b951-d872f2087c98
Diffstat (limited to 'native_client_sdk')
| -rw-r--r-- | native_client_sdk/src/doc/reference/pnacl-bitcode-abi.rst | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/native_client_sdk/src/doc/reference/pnacl-bitcode-abi.rst b/native_client_sdk/src/doc/reference/pnacl-bitcode-abi.rst index 8216ddd..b4cf4e8 100644 --- a/native_client_sdk/src/doc/reference/pnacl-bitcode-abi.rst +++ b/native_client_sdk/src/doc/reference/pnacl-bitcode-abi.rst @@ -26,6 +26,17 @@ High Level Structure A PNaCl portable executable (**pexe** in short) is a single LLVM IR module. +Data Model +---------- + +The data model for PNaCl bitcode is fixed at little-endian ILP32: pointers are +32 bits in size. 64-bit integer types are also supported natively via the i64 +type (for example, a front-end can generate these from the C/C++ type +``long long``). + +Floating point support is fixed at IEEE 754 32-bit and 64-bit values (f32 and +f64, respectively). + .. _bitcode_linkagetypes: Linkage Types @@ -217,8 +228,6 @@ A pointer is *normalized* if it's either: * Is the return value of a ``bitcast`` instruction. * Is the return value of a ``inttoptr`` instruction. -Note: the size of a pointer in PNaCl is 32 bits. - Undefined Values ---------------- |