[WinEH] Add codegen support for cleanuppad and cleanupret

[oota-llvm.git] / lib / Target / X86 / Utils / X86ShuffleDecode.cpp

diff --git a/lib/Target/X86/Utils/X86ShuffleDecode.cpp b/lib/Target/X86/Utils/X86ShuffleDecode.cpp
index ef3318ba75806d8d5b6b6026463cfab2b42f3a5a..17acdb3aa21c278e26d2fea79d1de60884f6fe4d 100644 (file)
--- a/lib/Target/X86/Utils/X86ShuffleDecode.cpp
+++ b/lib/Target/X86/Utils/X86ShuffleDecode.cpp
@@ -255,15 +255,13 @@ void DecodeUNPCKLMask(MVT VT, SmallVectorImpl<int> &ShuffleMask) {
 
 void DecodeVPERM2X128Mask(MVT VT, unsigned Imm,
                           SmallVectorImpl<int> &ShuffleMask) {
-  if (Imm & 0x88)
-    return; // Not a shuffle
-
   unsigned HalfSize = VT.getVectorNumElements() / 2;
 
   for (unsigned l = 0; l != 2; ++l) {
-    unsigned HalfBegin = ((Imm >> (l * 4)) & 0x3) * HalfSize;
+    unsigned HalfMask = Imm >> (l * 4);
+    unsigned HalfBegin = (HalfMask & 0x3) * HalfSize;
     for (unsigned i = HalfBegin, e = HalfBegin + HalfSize; i != e; ++i)
-      ShuffleMask.push_back(i);
+      ShuffleMask.push_back(HalfMask & 8 ? SM_SentinelZero : (int)i);
   }
 }
 
@@ -431,4 +429,148 @@ void DecodeScalarMoveMask(MVT VT, bool IsLoad, SmallVectorImpl<int> &Mask) {
   for (unsigned i = 1; i < NumElts; i++)
     Mask.push_back(IsLoad ? static_cast<int>(SM_SentinelZero) : i);
 }
+
+void DecodeEXTRQIMask(int Len, int Idx,
+                      SmallVectorImpl<int> &ShuffleMask) {
+  // Only the bottom 6 bits are valid for each immediate.
+  Len &= 0x3F;
+  Idx &= 0x3F;
+
+  // We can only decode this bit extraction instruction as a shuffle if both the
+  // length and index work with whole bytes.
+  if (0 != (Len % 8) || 0 != (Idx % 8))
+    return;
+
+  // A length of zero is equivalent to a bit length of 64.
+  if (Len == 0)
+    Len = 64;
+
+  // If the length + index exceeds the bottom 64 bits the result is undefined.
+  if ((Len + Idx) > 64) {
+    ShuffleMask.append(16, SM_SentinelUndef);
+    return;
+  }
+
+  // Convert index and index to work with bytes.
+  Len /= 8;
+  Idx /= 8;
+
+  // EXTRQ: Extract Len bytes starting from Idx. Zero pad the remaining bytes
+  // of the lower 64-bits. The upper 64-bits are undefined.
+  for (int i = 0; i != Len; ++i)
+    ShuffleMask.push_back(i + Idx);
+  for (int i = Len; i != 8; ++i)
+    ShuffleMask.push_back(SM_SentinelZero);
+  for (int i = 8; i != 16; ++i)
+    ShuffleMask.push_back(SM_SentinelUndef);
+}
+
+void DecodeINSERTQIMask(int Len, int Idx,
+                        SmallVectorImpl<int> &ShuffleMask) {
+  // Only the bottom 6 bits are valid for each immediate.
+  Len &= 0x3F;
+  Idx &= 0x3F;
+
+  // We can only decode this bit insertion instruction as a shuffle if both the
+  // length and index work with whole bytes.
+  if (0 != (Len % 8) || 0 != (Idx % 8))
+    return;
+
+  // A length of zero is equivalent to a bit length of 64.
+  if (Len == 0)
+    Len = 64;
+
+  // If the length + index exceeds the bottom 64 bits the result is undefined.
+  if ((Len + Idx) > 64) {
+    ShuffleMask.append(16, SM_SentinelUndef);
+    return;
+  }
+
+  // Convert index and index to work with bytes.
+  Len /= 8;
+  Idx /= 8;
+
+  // INSERTQ: Extract lowest Len bytes from lower half of second source and
+  // insert over first source starting at Idx byte. The upper 64-bits are
+  // undefined.
+  for (int i = 0; i != Idx; ++i)
+    ShuffleMask.push_back(i);
+  for (int i = 0; i != Len; ++i)
+    ShuffleMask.push_back(i + 16);
+  for (int i = Idx + Len; i != 8; ++i)
+    ShuffleMask.push_back(i);
+  for (int i = 8; i != 16; ++i)
+    ShuffleMask.push_back(SM_SentinelUndef);
+}
+
+void DecodeVPERMVMask(ArrayRef<uint64_t> RawMask,
+                      SmallVectorImpl<int> &ShuffleMask) {
+  for (int i = 0, e = RawMask.size(); i < e; ++i) {
+    uint64_t M = RawMask[i];
+    ShuffleMask.push_back((int)M);
+  }
+}
+
+void DecodeVPERMV3Mask(ArrayRef<uint64_t> RawMask,
+                      SmallVectorImpl<int> &ShuffleMask) {
+  for (int i = 0, e = RawMask.size(); i < e; ++i) {
+    uint64_t M = RawMask[i];
+    ShuffleMask.push_back((int)M);
+  }
+}
+
+void DecodeVPERMVMask(const Constant *C, MVT VT,
+                      SmallVectorImpl<int> &ShuffleMask) {
+  Type *MaskTy = C->getType();
+  if (MaskTy->isVectorTy()) {
+    unsigned NumElements = MaskTy->getVectorNumElements();
+    if (NumElements == VT.getVectorNumElements()) {
+      for (unsigned i = 0; i < NumElements; ++i) {
+        Constant *COp = C->getAggregateElement(i);
+        if (!COp || (!isa<UndefValue>(COp) && !isa<ConstantInt>(COp))) {
+          ShuffleMask.clear();
+          return;
+        }
+        if (isa<UndefValue>(COp))
+          ShuffleMask.push_back(SM_SentinelUndef);
+        else {
+          uint64_t Element = cast<ConstantInt>(COp)->getZExtValue();
+          Element &= (1 << NumElements) - 1;
+          ShuffleMask.push_back(Element);
+        }
+      }
+    }
+    return;
+  }
+  // Scalar value; just broadcast it
+  if (!isa<ConstantInt>(C))
+    return;
+  uint64_t Element = cast<ConstantInt>(C)->getZExtValue();
+  int NumElements = VT.getVectorNumElements();
+  Element &= (1 << NumElements) - 1;
+  for (int i = 0; i < NumElements; ++i)
+    ShuffleMask.push_back(Element);
+}
+
+void DecodeVPERMV3Mask(const Constant *C, MVT VT,
+                       SmallVectorImpl<int> &ShuffleMask) {
+  Type *MaskTy = C->getType();
+  unsigned NumElements = MaskTy->getVectorNumElements();
+  if (NumElements == VT.getVectorNumElements()) {
+    for (unsigned i = 0; i < NumElements; ++i) {
+      Constant *COp = C->getAggregateElement(i);
+      if (!COp) {
+        ShuffleMask.clear();
+        return;
+      }
+      if (isa<UndefValue>(COp))
+        ShuffleMask.push_back(SM_SentinelUndef);
+      else {
+        uint64_t Element = cast<ConstantInt>(COp)->getZExtValue();
+        Element &= (1 << NumElements*2) - 1;
+        ShuffleMask.push_back(Element);
+      }
+    }
+  }
+}
 } // llvm namespace