llvm-6502/lib/Support
Tamas Berghammer 6055ca7bf4 Add getSizeInBits function to the APFloat class
The newly added function returns the size of the specified floating
point semantics in bits.

Differential revision: http://reviews.llvm.org/D8413

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241793 91177308-0d34-0410-b5e6-96231b3b80d8
2015-07-09 10:13:39 +00:00
..
Unix Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC) 2015-06-23 09:49:53 +00:00
Windows [Support] Lazy load of dbghlp.dll on Windows 2015-07-02 14:34:57 +00:00
Allocator.cpp Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC) 2015-06-23 09:49:53 +00:00
APFloat.cpp Add getSizeInBits function to the APFloat class 2015-07-09 10:13:39 +00:00
APInt.cpp Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC) 2015-06-23 09:49:53 +00:00
APSInt.cpp ADT: Add a string APSInt constructor. 2015-06-23 18:22:10 +00:00
ARMBuildAttrs.cpp Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC) 2015-06-23 09:49:53 +00:00
ARMWinEH.cpp Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC) 2015-06-23 09:49:53 +00:00
Atomic.cpp
BlockFrequency.cpp
BranchProbability.cpp
circular_raw_ostream.cpp
CMakeLists.txt [Support] Lazy load of dbghlp.dll on Windows 2015-07-02 14:34:57 +00:00
COM.cpp Make an RAII com initializer. 2015-04-27 17:19:26 +00:00
CommandLine.cpp Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC) 2015-06-23 09:49:53 +00:00
Compression.cpp Purge unused includes throughout libSupport. 2015-03-23 18:07:13 +00:00
ConvertUTF.c
ConvertUTFWrapper.cpp Make UTF8->UTF16 conversion null terminate output on empty input. 2015-02-08 18:08:51 +00:00
COPYRIGHT.regex
CrashRecoveryContext.cpp Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC) 2015-06-23 09:49:53 +00:00
DAGDeltaAlgorithm.cpp Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC) 2015-06-23 09:49:53 +00:00
DataExtractor.cpp
DataStream.cpp Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC) 2015-06-23 09:49:53 +00:00
Debug.cpp Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC) 2015-06-23 09:49:53 +00:00
DeltaAlgorithm.cpp
Dwarf.cpp Debug info: Add dwarf backend support for DIModule. 2015-06-30 02:13:04 +00:00
DynamicLibrary.cpp Add more wrappers for symbol APIs to the C API. 2015-06-09 15:57:30 +00:00
Errno.cpp
ErrorHandling.cpp [cleanup] Re-sort all the #include lines in LLVM using 2015-01-14 11:23:27 +00:00
FileOutputBuffer.cpp Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC) 2015-06-23 09:49:53 +00:00
FileUtilities.cpp
FoldingSet.cpp fix typos; NFC 2015-04-06 16:21:12 +00:00
FormattedStream.cpp Re-sort includes with sort-includes.py and insert raw_ostream.h where it's used. 2015-03-23 19:32:43 +00:00
GraphWriter.cpp [GraphWriter] Don't wait on xdg-open when not on Apple. 2015-07-02 09:32:07 +00:00
Hashing.cpp
Host.cpp [SystemZ] Add z13 vector facility and MC support 2015-05-05 19:23:40 +00:00
IntEqClasses.cpp
IntervalMap.cpp
IntrusiveRefCntPtr.cpp
LEB128.cpp
LineIterator.cpp
LLVMBuild.txt
Locale.cpp Fix "the the" in comments. 2015-06-19 01:53:21 +00:00
LockFileManager.cpp Reapply "Use gethostuuid() on Mac to identify hosts for LockFileManager" 2015-06-29 22:16:39 +00:00
Makefile
ManagedStatic.cpp
MathExtras.cpp Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC) 2015-06-23 09:49:53 +00:00
MD5.cpp Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC) 2015-06-23 09:49:53 +00:00
Memory.cpp
MemoryBuffer.cpp Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC) 2015-06-23 09:49:53 +00:00
MemoryObject.cpp
Mutex.cpp Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC) 2015-06-23 09:49:53 +00:00
Options.cpp
Path.cpp Purge unused includes throughout libSupport. 2015-03-23 18:07:13 +00:00
PluginLoader.cpp
PrettyStackTrace.cpp Fix the preprocessor checks used to determine if backtraces have been enabled. 2015-01-29 07:53:13 +00:00
Process.cpp Assert that Process::FindInEnvPath() is passed a relative path. 2015-04-24 22:18:46 +00:00
Program.cpp Purge unused includes throughout libSupport. 2015-03-23 18:07:13 +00:00
RandomNumberGenerator.cpp Add missing include that MSVC complains about. 2015-03-23 18:19:41 +00:00
raw_os_ostream.cpp
raw_ostream.cpp Fix indentation. NFC. 2015-05-30 07:35:21 +00:00
README.txt.system
regcclass.h
regcname.h
regcomp.c Use wider type for overflow check on LLP64 platforms like Win64, found by clang-cl -Wtautological 2015-02-26 21:07:30 +00:00
regengine.inc
regerror.c
regex2.h
regex_impl.h
Regex.cpp Remove more superfluous .str() and replace std::string concatenation with Twine. 2015-03-30 15:42:36 +00:00
regexec.c
regfree.c
regstrlcpy.c
regutils.h
RWMutex.cpp Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC) 2015-06-23 09:49:53 +00:00
ScaledNumber.cpp Purge unused includes throughout libSupport. 2015-03-23 18:07:13 +00:00
SearchForAddressOfSpecialSymbol.cpp
Signals.cpp
SmallPtrSet.cpp Sync the __builtin_expects for our 3 quadratically probed hash table implementations. 2015-02-23 16:41:36 +00:00
SmallVector.cpp [ADT] Assert that SmallVectorBase::grow_pod() successfully reallocates memory. 2015-06-09 09:47:46 +00:00
SourceMgr.cpp MIR Serialization: Connect the machine function analysis pass to the MIR parser. 2015-06-15 20:30:22 +00:00
SpecialCaseList.cpp Purge unused includes throughout libSupport. 2015-03-23 18:07:13 +00:00
Statistic.cpp Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC) 2015-06-23 09:49:53 +00:00
StreamingMemoryObject.cpp Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC) 2015-06-23 09:49:53 +00:00
StringExtras.cpp Purge unused includes throughout libSupport. 2015-03-23 18:07:13 +00:00
StringMap.cpp Sync the __builtin_expects for our 3 quadratically probed hash table implementations. 2015-02-23 16:41:36 +00:00
StringPool.cpp
StringRef.cpp
StringSaver.cpp Bring in a BumpPtrStringSaver from lld and simplify the interface. 2015-06-13 12:49:52 +00:00
SystemUtils.cpp Purge unused includes throughout libSupport. 2015-03-23 18:07:13 +00:00
TargetParser.cpp [ARM]: Extend -mfpu options for half-precision and vfpv3xd 2015-06-29 09:53:33 +00:00
TargetRegistry.cpp Readdress r236990, use of static members on a non-static variable. 2015-05-11 22:20:48 +00:00
Threading.cpp
ThreadLocal.cpp
Timer.cpp Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC) 2015-06-23 09:49:53 +00:00
TimeValue.cpp Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC) 2015-06-23 09:49:53 +00:00
ToolOutputFile.cpp
Triple.cpp [Triple] Add a helper to switch between big/little endian variants 2015-07-06 23:58:14 +00:00
Twine.cpp Reformat. 2015-05-25 01:43:34 +00:00
Unicode.cpp
Valgrind.cpp Provide the same ABI regardless of NDEBUG 2015-02-19 05:30:16 +00:00
Watchdog.cpp
YAMLParser.cpp Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC) 2015-06-23 09:49:53 +00:00
YAMLTraits.cpp [YAMLIO] Make line-wrapping configurable and test it. 2015-05-29 17:56:28 +00:00

Design Of lib/System
====================

The software in this directory is designed to completely shield LLVM from any
and all operating system specific functionality. It is not intended to be a
complete operating system wrapper (such as ACE), but only to provide the
functionality necessary to support LLVM.

The software located here, of necessity, has very specific and stringent design
rules. Violation of these rules means that cracks in the shield could form and
the primary goal of the library is defeated. By consistently using this library,
LLVM becomes more easily ported to new platforms since the only thing requiring
porting is this library.

Complete documentation for the library can be found in the file:
  llvm/docs/SystemLibrary.html
or at this URL:
  http://llvm.org/docs/SystemLibrary.html

While we recommend that you read the more detailed documentation, for the
impatient, here's a high level summary of the library's requirements.

 1. No system header files are to be exposed through the interface.
 2. Std C++ and Std C header files are okay to be exposed through the interface.
 3. No exposed system-specific functions.
 4. No exposed system-specific data.
 5. Data in lib/System classes must use only simple C++ intrinsic types.
 6. Errors are handled by returning "true" and setting an optional std::string
 7. Library must not throw any exceptions, period.
 8. Interface functions must not have throw() specifications.
 9. No duplicate function impementations are permitted within an operating
    system class.

To accomplish these requirements, the library has numerous design criteria that
must be satisfied. Here's a high level summary of the library's design criteria:

 1. No unused functionality (only what LLVM needs)
 2. High-Level Interfaces
 3. Use Opaque Classes
 4. Common Implementations
 5. Multiple Implementations
 6. Minimize Memory Allocation
 7. No Virtual Methods