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-rw-r--r--contrib/llvm/lib/Target/X86/Utils/X86ShuffleDecode.cpp140
1 files changed, 49 insertions, 91 deletions
diff --git a/contrib/llvm/lib/Target/X86/Utils/X86ShuffleDecode.cpp b/contrib/llvm/lib/Target/X86/Utils/X86ShuffleDecode.cpp
index cae865a..619f7c8 100644
--- a/contrib/llvm/lib/Target/X86/Utils/X86ShuffleDecode.cpp
+++ b/contrib/llvm/lib/Target/X86/Utils/X86ShuffleDecode.cpp
@@ -13,7 +13,6 @@
//===----------------------------------------------------------------------===//
#include "X86ShuffleDecode.h"
-#include "llvm/IR/Constants.h"
#include "llvm/CodeGen/MachineValueType.h"
//===----------------------------------------------------------------------===//
@@ -140,13 +139,14 @@ void DecodePALIGNRMask(MVT VT, unsigned Imm,
}
}
-/// DecodePSHUFMask - This decodes the shuffle masks for pshufd, and vpermilp*.
+/// DecodePSHUFMask - This decodes the shuffle masks for pshufw, pshufd, and vpermilp*.
/// VT indicates the type of the vector allowing it to handle different
/// datatypes and vector widths.
void DecodePSHUFMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask) {
unsigned NumElts = VT.getVectorNumElements();
unsigned NumLanes = VT.getSizeInBits() / 128;
+ if (NumLanes == 0) NumLanes = 1; // Handle MMX
unsigned NumLaneElts = NumElts / NumLanes;
unsigned NewImm = Imm;
@@ -191,6 +191,16 @@ void DecodePSHUFLWMask(MVT VT, unsigned Imm,
}
}
+void DecodePSWAPMask(MVT VT, SmallVectorImpl<int> &ShuffleMask) {
+ unsigned NumElts = VT.getVectorNumElements();
+ unsigned NumHalfElts = NumElts / 2;
+
+ for (unsigned l = 0; l != NumHalfElts; ++l)
+ ShuffleMask.push_back(l + NumHalfElts);
+ for (unsigned h = 0; h != NumHalfElts; ++h)
+ ShuffleMask.push_back(h);
+}
+
/// DecodeSHUFPMask - This decodes the shuffle masks for shufp*. VT indicates
/// the type of the vector allowing it to handle different datatypes and vector
/// widths.
@@ -222,7 +232,7 @@ void DecodeUNPCKHMask(MVT VT, SmallVectorImpl<int> &ShuffleMask) {
// Handle 128 and 256-bit vector lengths. AVX defines UNPCK* to operate
// independently on 128-bit lanes.
unsigned NumLanes = VT.getSizeInBits() / 128;
- if (NumLanes == 0 ) NumLanes = 1; // Handle MMX
+ if (NumLanes == 0) NumLanes = 1; // Handle MMX
unsigned NumLaneElts = NumElts / NumLanes;
for (unsigned l = 0; l != NumElts; l += NumLaneElts) {
@@ -253,6 +263,26 @@ void DecodeUNPCKLMask(MVT VT, SmallVectorImpl<int> &ShuffleMask) {
}
}
+/// \brief Decode a shuffle packed values at 128-bit granularity
+/// (SHUFF32x4/SHUFF64x2/SHUFI32x4/SHUFI64x2)
+/// immediate mask into a shuffle mask.
+void decodeVSHUF64x2FamilyMask(MVT VT, unsigned Imm,
+ SmallVectorImpl<int> &ShuffleMask) {
+ unsigned NumLanes = VT.getSizeInBits() / 128;
+ unsigned NumElementsInLane = 128 / VT.getScalarSizeInBits();
+ unsigned ControlBitsMask = NumLanes - 1;
+ unsigned NumControlBits = NumLanes / 2;
+
+ for (unsigned l = 0; l != NumLanes; ++l) {
+ unsigned LaneMask = (Imm >> (l * NumControlBits)) & ControlBitsMask;
+ // We actually need the other source.
+ if (l >= NumLanes / 2)
+ LaneMask += NumLanes;
+ for (unsigned i = 0; i != NumElementsInLane; ++i)
+ ShuffleMask.push_back(LaneMask * NumElementsInLane + i);
+ }
+}
+
void DecodeVPERM2X128Mask(MVT VT, unsigned Imm,
SmallVectorImpl<int> &ShuffleMask) {
unsigned HalfSize = VT.getVectorNumElements() / 2;
@@ -265,54 +295,6 @@ void DecodeVPERM2X128Mask(MVT VT, unsigned Imm,
}
}
-void DecodePSHUFBMask(const Constant *C, SmallVectorImpl<int> &ShuffleMask) {
- Type *MaskTy = C->getType();
- // It is not an error for the PSHUFB mask to not be a vector of i8 because the
- // constant pool uniques constants by their bit representation.
- // e.g. the following take up the same space in the constant pool:
- // i128 -170141183420855150465331762880109871104
- //
- // <2 x i64> <i64 -9223372034707292160, i64 -9223372034707292160>
- //
- // <4 x i32> <i32 -2147483648, i32 -2147483648,
- // i32 -2147483648, i32 -2147483648>
-
- unsigned MaskTySize = MaskTy->getPrimitiveSizeInBits();
-
- if (MaskTySize != 128 && MaskTySize != 256) // FIXME: Add support for AVX-512.
- return;
-
- // This is a straightforward byte vector.
- if (MaskTy->isVectorTy() && MaskTy->getVectorElementType()->isIntegerTy(8)) {
- int NumElements = MaskTy->getVectorNumElements();
- ShuffleMask.reserve(NumElements);
-
- for (int i = 0; i < NumElements; ++i) {
- // For AVX vectors with 32 bytes the base of the shuffle is the 16-byte
- // lane of the vector we're inside.
- int Base = i < 16 ? 0 : 16;
- Constant *COp = C->getAggregateElement(i);
- if (!COp) {
- ShuffleMask.clear();
- return;
- } else if (isa<UndefValue>(COp)) {
- ShuffleMask.push_back(SM_SentinelUndef);
- continue;
- }
- uint64_t Element = cast<ConstantInt>(COp)->getZExtValue();
- // If the high bit (7) of the byte is set, the element is zeroed.
- if (Element & (1 << 7))
- ShuffleMask.push_back(SM_SentinelZero);
- else {
- // Only the least significant 4 bits of the byte are used.
- int Index = Base + (Element & 0xf);
- ShuffleMask.push_back(Index);
- }
- }
- }
- // TODO: Handle funny-looking vectors too.
-}
-
void DecodePSHUFBMask(ArrayRef<uint64_t> RawMask,
SmallVectorImpl<int> &ShuffleMask) {
for (int i = 0, e = RawMask.size(); i < e; ++i) {
@@ -357,46 +339,6 @@ void DecodeVPERMMask(unsigned Imm, SmallVectorImpl<int> &ShuffleMask) {
}
}
-void DecodeVPERMILPMask(const Constant *C, SmallVectorImpl<int> &ShuffleMask) {
- Type *MaskTy = C->getType();
- assert(MaskTy->isVectorTy() && "Expected a vector constant mask!");
- assert(MaskTy->getVectorElementType()->isIntegerTy() &&
- "Expected integer constant mask elements!");
- int ElementBits = MaskTy->getScalarSizeInBits();
- int NumElements = MaskTy->getVectorNumElements();
- assert((NumElements == 2 || NumElements == 4 || NumElements == 8) &&
- "Unexpected number of vector elements.");
- ShuffleMask.reserve(NumElements);
- if (auto *CDS = dyn_cast<ConstantDataSequential>(C)) {
- assert((unsigned)NumElements == CDS->getNumElements() &&
- "Constant mask has a different number of elements!");
-
- for (int i = 0; i < NumElements; ++i) {
- int Base = (i * ElementBits / 128) * (128 / ElementBits);
- uint64_t Element = CDS->getElementAsInteger(i);
- // Only the least significant 2 bits of the integer are used.
- int Index = Base + (Element & 0x3);
- ShuffleMask.push_back(Index);
- }
- } else if (auto *CV = dyn_cast<ConstantVector>(C)) {
- assert((unsigned)NumElements == C->getNumOperands() &&
- "Constant mask has a different number of elements!");
-
- for (int i = 0; i < NumElements; ++i) {
- int Base = (i * ElementBits / 128) * (128 / ElementBits);
- Constant *COp = CV->getOperand(i);
- if (isa<UndefValue>(COp)) {
- ShuffleMask.push_back(SM_SentinelUndef);
- continue;
- }
- uint64_t Element = cast<ConstantInt>(COp)->getZExtValue();
- // Only the least significant 2 bits of the integer are used.
- int Index = Base + (Element & 0x3);
- ShuffleMask.push_back(Index);
- }
- }
-}
-
void DecodeZeroExtendMask(MVT SrcVT, MVT DstVT, SmallVectorImpl<int> &Mask) {
unsigned NumDstElts = DstVT.getVectorNumElements();
unsigned SrcScalarBits = SrcVT.getScalarSizeInBits();
@@ -503,4 +445,20 @@ void DecodeINSERTQIMask(int Len, int Idx,
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);
+ }
+}
+
} // llvm namespace
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