* Add option to read isLittleEndianEncoding for InstrInfo classes

* Doxygen-ify some function comments


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16974 91177308-0d34-0410-b5e6-96231b3b80d8

utils/TableGen/CodeGenTarget.cpp

@@ -188,6 +188,7 @@ void CodeGenTarget::ReadInstructions() const {
 }
 
 /// getPHIInstruction - Return the designated PHI instruction.
+///
 const CodeGenInstruction &CodeGenTarget::getPHIInstruction() const {
   Record *PHI = getInstructionSet()->getValueAsDef("PHIInst");
   std::map<std::string, CodeGenInstruction>::const_iterator I =
@@ -197,6 +198,13 @@ const CodeGenInstruction &CodeGenTarget::getPHIInstruction() const {
   return I->second;
 }
 
+/// isLittleEndianEncoding - Return whether this target encodes its instruction
+/// in little-endian format, i.e. bits laid out in the order [0..n]
+///
+bool CodeGenTarget::isLittleEndianEncoding() const {
+  return getInstructionSet()->getValueAsBit("isLittleEndianEncoding");
+}
+
 CodeGenInstruction::CodeGenInstruction(Record *R, const std::string &AsmStr)
   : TheDef(R), AsmString(AsmStr) {
   Name      = R->getValueAsString("Name");
@@ -250,6 +258,7 @@ CodeGenInstruction::CodeGenInstruction(Record *R, const std::string &AsmStr)
 /// getOperandNamed - Return the index of the operand with the specified
 /// non-empty name.  If the instruction does not have an operand with the
 /// specified name, throw an exception.
+///
 unsigned CodeGenInstruction::getOperandNamed(const std::string &Name) const {
   assert(!Name.empty() && "Cannot search for operand with no name!");
   for (unsigned i = 0, e = OperandList.size(); i != e; ++i)

utils/TableGen/CodeGenTarget.h

@@ -96,6 +96,10 @@ public:
   /// getPHIInstruction - Return the designated PHI instruction.
   ///
   const CodeGenInstruction &getPHIInstruction() const;
+
+  /// isLittleEndianEncoding - are instruction bit patterns defined as  [0..n]?
+  ///
+  bool isLittleEndianEncoding() const;
 };
 
 } // End llvm namespace