diff options
| -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 ---------------- |