X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=utils%2FTableGen%2FCodeGenTarget.cpp;h=4b8efff600c03107f155b769870c1f7e2c89cde0;hb=d92ff21d6f526cadea7d6db21f493ba5c85e1411;hp=cd0b8c7b9e110ea2ba3408e21fdac573f1435424;hpb=da750239bd1f02aef403baa4805805fb580e78e1;p=oota-llvm.git

diff --git a/utils/TableGen/CodeGenTarget.cpp b/utils/TableGen/CodeGenTarget.cpp
index cd0b8c7b9e1..4b8efff600c 100644
--- a/utils/TableGen/CodeGenTarget.cpp
+++ b/utils/TableGen/CodeGenTarget.cpp
@@ -321,6 +321,8 @@ void CodeGenTarget::ComputeInstrsByEnum() const {
     "BUNDLE",
     "LIFETIME_START",
     "LIFETIME_END",
+    "STACKMAP",
+    "PATCHPOINT",
     0
   };
   const DenseMap<const Record*, CodeGenInstruction*> &Insts = getInstructions();
@@ -355,6 +357,46 @@ bool CodeGenTarget::isLittleEndianEncoding() const {
   return getInstructionSet()->getValueAsBit("isLittleEndianEncoding");
 }
 
+/// reverseBitsForLittleEndianEncoding - For little-endian instruction bit
+/// encodings, reverse the bit order of all instructions.
+void CodeGenTarget::reverseBitsForLittleEndianEncoding() {
+  if (!isLittleEndianEncoding())
+    return;
+
+  std::vector<Record*> Insts = Records.getAllDerivedDefinitions("Instruction");
+  for (std::vector<Record*>::iterator I = Insts.begin(), E = Insts.end();
+       I != E; ++I) {
+    Record *R = *I;
+    if (R->getValueAsString("Namespace") == "TargetOpcode" ||
+        R->getValueAsBit("isPseudo"))
+      continue;
+
+    BitsInit *BI = R->getValueAsBitsInit("Inst");
+
+    unsigned numBits = BI->getNumBits();
+ 
+    SmallVector<Init *, 16> NewBits(numBits);
+ 
+    for (unsigned bit = 0, end = numBits / 2; bit != end; ++bit) {
+      unsigned bitSwapIdx = numBits - bit - 1;
+      Init *OrigBit = BI->getBit(bit);
+      Init *BitSwap = BI->getBit(bitSwapIdx);
+      NewBits[bit]        = BitSwap;
+      NewBits[bitSwapIdx] = OrigBit;
+    }
+    if (numBits % 2) {
+      unsigned middle = (numBits + 1) / 2;
+      NewBits[middle] = BI->getBit(middle);
+    }
+
+    BitsInit *NewBI = BitsInit::get(NewBits);
+
+    // Update the bits in reversed order so that emitInstrOpBits will get the
+    // correct endianness.
+    R->getValue("Inst")->setValue(NewBI);
+  }
+}
+
 /// guessInstructionProperties - Return true if it's OK to guess instruction
 /// properties instead of raising an error.
 ///