-//===-- X86ShuffleDecode.cpp - X86 shuffle decode logic -------------------===//\r
-//\r
-// The LLVM Compiler Infrastructure\r
-//\r
-// This file is distributed under the University of Illinois Open Source\r
-// License. See LICENSE.TXT for details.\r
-//\r
-//===----------------------------------------------------------------------===//\r
-//\r
-// Define several functions to decode x86 specific shuffle semantics into a\r
-// generic vector mask.\r
-//\r
-//===----------------------------------------------------------------------===//\r
-\r
-#include "X86ShuffleDecode.h"\r
-#include "llvm/IR/Constants.h"\r
-#include "llvm/CodeGen/MachineValueType.h"\r
-\r
-//===----------------------------------------------------------------------===//\r
-// Vector Mask Decoding\r
-//===----------------------------------------------------------------------===//\r
-\r
-namespace llvm {\r
-\r
-void DecodeINSERTPSMask(unsigned Imm, SmallVectorImpl<int> &ShuffleMask) {\r
- // Defaults the copying the dest value.\r
- ShuffleMask.push_back(0);\r
- ShuffleMask.push_back(1);\r
- ShuffleMask.push_back(2);\r
- ShuffleMask.push_back(3);\r
-\r
- // Decode the immediate.\r
- unsigned ZMask = Imm & 15;\r
- unsigned CountD = (Imm >> 4) & 3;\r
- unsigned CountS = (Imm >> 6) & 3;\r
-\r
- // CountS selects which input element to use.\r
- unsigned InVal = 4+CountS;\r
- // CountD specifies which element of destination to update.\r
- ShuffleMask[CountD] = InVal;\r
- // ZMask zaps values, potentially overriding the CountD elt.\r
- if (ZMask & 1) ShuffleMask[0] = SM_SentinelZero;\r
- if (ZMask & 2) ShuffleMask[1] = SM_SentinelZero;\r
- if (ZMask & 4) ShuffleMask[2] = SM_SentinelZero;\r
- if (ZMask & 8) ShuffleMask[3] = SM_SentinelZero;\r
-}\r
-\r
-// <3,1> or <6,7,2,3>\r
-void DecodeMOVHLPSMask(unsigned NElts, SmallVectorImpl<int> &ShuffleMask) {\r
- for (unsigned i = NElts/2; i != NElts; ++i)\r
- ShuffleMask.push_back(NElts+i);\r
-\r
- for (unsigned i = NElts/2; i != NElts; ++i)\r
- ShuffleMask.push_back(i);\r
-}\r
-\r
-// <0,2> or <0,1,4,5>\r
-void DecodeMOVLHPSMask(unsigned NElts, SmallVectorImpl<int> &ShuffleMask) {\r
- for (unsigned i = 0; i != NElts/2; ++i)\r
- ShuffleMask.push_back(i);\r
-\r
- for (unsigned i = 0; i != NElts/2; ++i)\r
- ShuffleMask.push_back(NElts+i);\r
-}\r
-\r
-void DecodeMOVSLDUPMask(MVT VT, SmallVectorImpl<int> &ShuffleMask) {\r
- unsigned NumElts = VT.getVectorNumElements();\r
- for (int i = 0, e = NumElts / 2; i < e; ++i) {\r
- ShuffleMask.push_back(2 * i);\r
- ShuffleMask.push_back(2 * i);\r
- }\r
-}\r
-\r
-void DecodeMOVSHDUPMask(MVT VT, SmallVectorImpl<int> &ShuffleMask) {\r
- unsigned NumElts = VT.getVectorNumElements();\r
- for (int i = 0, e = NumElts / 2; i < e; ++i) {\r
- ShuffleMask.push_back(2 * i + 1);\r
- ShuffleMask.push_back(2 * i + 1);\r
- }\r
-}\r
-\r
-void DecodeMOVDDUPMask(MVT VT, SmallVectorImpl<int> &ShuffleMask) {\r
- unsigned VectorSizeInBits = VT.getSizeInBits();\r
- unsigned ScalarSizeInBits = VT.getScalarSizeInBits();\r
- unsigned NumElts = VT.getVectorNumElements();\r
- unsigned NumLanes = VectorSizeInBits / 128;\r
- unsigned NumLaneElts = NumElts / NumLanes;\r
- unsigned NumLaneSubElts = 64 / ScalarSizeInBits;\r
-\r
- for (unsigned l = 0; l < NumElts; l += NumLaneElts)\r
- for (unsigned i = 0; i < NumLaneElts; i += NumLaneSubElts)\r
- for (unsigned s = 0; s != NumLaneSubElts; s++)\r
- ShuffleMask.push_back(l + s);\r
-}\r
-\r
-void DecodePSLLDQMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask) {\r
- unsigned VectorSizeInBits = VT.getSizeInBits();\r
- unsigned NumElts = VectorSizeInBits / 8;\r
- unsigned NumLanes = VectorSizeInBits / 128;\r
- unsigned NumLaneElts = NumElts / NumLanes;\r
-\r
- for (unsigned l = 0; l < NumElts; l += NumLaneElts)\r
- for (unsigned i = 0; i < NumLaneElts; ++i) {\r
- int M = SM_SentinelZero;\r
- if (i >= Imm) M = i - Imm + l;\r
- ShuffleMask.push_back(M);\r
- }\r
-}\r
-\r
-void DecodePSRLDQMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask) {\r
- unsigned VectorSizeInBits = VT.getSizeInBits();\r
- unsigned NumElts = VectorSizeInBits / 8;\r
- unsigned NumLanes = VectorSizeInBits / 128;\r
- unsigned NumLaneElts = NumElts / NumLanes;\r
-\r
- for (unsigned l = 0; l < NumElts; l += NumLaneElts)\r
- for (unsigned i = 0; i < NumLaneElts; ++i) {\r
- unsigned Base = i + Imm;\r
- int M = Base + l;\r
- if (Base >= NumLaneElts) M = SM_SentinelZero;\r
- ShuffleMask.push_back(M);\r
- }\r
-}\r
-\r
-void DecodePALIGNRMask(MVT VT, unsigned Imm,\r
- SmallVectorImpl<int> &ShuffleMask) {\r
- unsigned NumElts = VT.getVectorNumElements();\r
- unsigned Offset = Imm * (VT.getVectorElementType().getSizeInBits() / 8);\r
-\r
- unsigned NumLanes = VT.getSizeInBits() / 128;\r
- unsigned NumLaneElts = NumElts / NumLanes;\r
-\r
- for (unsigned l = 0; l != NumElts; l += NumLaneElts) {\r
- for (unsigned i = 0; i != NumLaneElts; ++i) {\r
- unsigned Base = i + Offset;\r
- // if i+offset is out of this lane then we actually need the other source\r
- if (Base >= NumLaneElts) Base += NumElts - NumLaneElts;\r
- ShuffleMask.push_back(Base + l);\r
- }\r
- }\r
-}\r
-\r
-/// DecodePSHUFMask - This decodes the shuffle masks for pshufd, and vpermilp*.\r
-/// VT indicates the type of the vector allowing it to handle different\r
-/// datatypes and vector widths.\r
-void DecodePSHUFMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask) {\r
- unsigned NumElts = VT.getVectorNumElements();\r
-\r
- unsigned NumLanes = VT.getSizeInBits() / 128;\r
- unsigned NumLaneElts = NumElts / NumLanes;\r
-\r
- unsigned NewImm = Imm;\r
- for (unsigned l = 0; l != NumElts; l += NumLaneElts) {\r
- for (unsigned i = 0; i != NumLaneElts; ++i) {\r
- ShuffleMask.push_back(NewImm % NumLaneElts + l);\r
- NewImm /= NumLaneElts;\r
- }\r
- if (NumLaneElts == 4) NewImm = Imm; // reload imm\r
- }\r
-}\r
-\r
-void DecodePSHUFHWMask(MVT VT, unsigned Imm,\r
- SmallVectorImpl<int> &ShuffleMask) {\r
- unsigned NumElts = VT.getVectorNumElements();\r
-\r
- for (unsigned l = 0; l != NumElts; l += 8) {\r
- unsigned NewImm = Imm;\r
- for (unsigned i = 0, e = 4; i != e; ++i) {\r
- ShuffleMask.push_back(l + i);\r
- }\r
- for (unsigned i = 4, e = 8; i != e; ++i) {\r
- ShuffleMask.push_back(l + 4 + (NewImm & 3));\r
- NewImm >>= 2;\r
- }\r
- }\r
-}\r
-\r
-void DecodePSHUFLWMask(MVT VT, unsigned Imm,\r
- SmallVectorImpl<int> &ShuffleMask) {\r
- unsigned NumElts = VT.getVectorNumElements();\r
-\r
- for (unsigned l = 0; l != NumElts; l += 8) {\r
- unsigned NewImm = Imm;\r
- for (unsigned i = 0, e = 4; i != e; ++i) {\r
- ShuffleMask.push_back(l + (NewImm & 3));\r
- NewImm >>= 2;\r
- }\r
- for (unsigned i = 4, e = 8; i != e; ++i) {\r
- ShuffleMask.push_back(l + i);\r
- }\r
- }\r
-}\r
-\r
-/// DecodeSHUFPMask - This decodes the shuffle masks for shufp*. VT indicates\r
-/// the type of the vector allowing it to handle different datatypes and vector\r
-/// widths.\r
-void DecodeSHUFPMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask) {\r
- unsigned NumElts = VT.getVectorNumElements();\r
-\r
- unsigned NumLanes = VT.getSizeInBits() / 128;\r
- unsigned NumLaneElts = NumElts / NumLanes;\r
-\r
- unsigned NewImm = Imm;\r
- for (unsigned l = 0; l != NumElts; l += NumLaneElts) {\r
- // each half of a lane comes from different source\r
- for (unsigned s = 0; s != NumElts*2; s += NumElts) {\r
- for (unsigned i = 0; i != NumLaneElts/2; ++i) {\r
- ShuffleMask.push_back(NewImm % NumLaneElts + s + l);\r
- NewImm /= NumLaneElts;\r
- }\r
- }\r
- if (NumLaneElts == 4) NewImm = Imm; // reload imm\r
- }\r
-}\r
-\r
-/// DecodeUNPCKHMask - This decodes the shuffle masks for unpckhps/unpckhpd\r
-/// and punpckh*. VT indicates the type of the vector allowing it to handle\r
-/// different datatypes and vector widths.\r
-void DecodeUNPCKHMask(MVT VT, SmallVectorImpl<int> &ShuffleMask) {\r
- unsigned NumElts = VT.getVectorNumElements();\r
-\r
- // Handle 128 and 256-bit vector lengths. AVX defines UNPCK* to operate\r
- // independently on 128-bit lanes.\r
- unsigned NumLanes = VT.getSizeInBits() / 128;\r
- if (NumLanes == 0 ) NumLanes = 1; // Handle MMX\r
- unsigned NumLaneElts = NumElts / NumLanes;\r
-\r
- for (unsigned l = 0; l != NumElts; l += NumLaneElts) {\r
- for (unsigned i = l + NumLaneElts/2, e = l + NumLaneElts; i != e; ++i) {\r
- ShuffleMask.push_back(i); // Reads from dest/src1\r
- ShuffleMask.push_back(i+NumElts); // Reads from src/src2\r
- }\r
- }\r
-}\r
-\r
-/// DecodeUNPCKLMask - This decodes the shuffle masks for unpcklps/unpcklpd\r
-/// and punpckl*. VT indicates the type of the vector allowing it to handle\r
-/// different datatypes and vector widths.\r
-void DecodeUNPCKLMask(MVT VT, SmallVectorImpl<int> &ShuffleMask) {\r
- unsigned NumElts = VT.getVectorNumElements();\r
-\r
- // Handle 128 and 256-bit vector lengths. AVX defines UNPCK* to operate\r
- // independently on 128-bit lanes.\r
- unsigned NumLanes = VT.getSizeInBits() / 128;\r
- if (NumLanes == 0 ) NumLanes = 1; // Handle MMX\r
- unsigned NumLaneElts = NumElts / NumLanes;\r
-\r
- for (unsigned l = 0; l != NumElts; l += NumLaneElts) {\r
- for (unsigned i = l, e = l + NumLaneElts/2; i != e; ++i) {\r
- ShuffleMask.push_back(i); // Reads from dest/src1\r
- ShuffleMask.push_back(i+NumElts); // Reads from src/src2\r
- }\r
- }\r
-}\r
-\r
-void DecodeVPERM2X128Mask(MVT VT, unsigned Imm,\r
- SmallVectorImpl<int> &ShuffleMask) {\r
- if (Imm & 0x88)\r
- return; // Not a shuffle\r
-\r
- unsigned HalfSize = VT.getVectorNumElements()/2;\r
-\r
- for (unsigned l = 0; l != 2; ++l) {\r
- unsigned HalfBegin = ((Imm >> (l*4)) & 0x3) * HalfSize;\r
- for (unsigned i = HalfBegin, e = HalfBegin+HalfSize; i != e; ++i)\r
- ShuffleMask.push_back(i);\r
- }\r
-}\r
-\r
-void DecodePSHUFBMask(const Constant *C, SmallVectorImpl<int> &ShuffleMask) {\r
- Type *MaskTy = C->getType();\r
- // It is not an error for the PSHUFB mask to not be a vector of i8 because the\r
- // constant pool uniques constants by their bit representation.\r
- // e.g. the following take up the same space in the constant pool:\r
- // i128 -170141183420855150465331762880109871104\r
- //\r
- // <2 x i64> <i64 -9223372034707292160, i64 -9223372034707292160>\r
- //\r
- // <4 x i32> <i32 -2147483648, i32 -2147483648,\r
- // i32 -2147483648, i32 -2147483648>\r
-\r
- unsigned MaskTySize = MaskTy->getPrimitiveSizeInBits();\r
-\r
- if (MaskTySize != 128 && MaskTySize != 256) // FIXME: Add support for AVX-512.\r
- return;\r
-\r
- // This is a straightforward byte vector.\r
- if (MaskTy->isVectorTy() && MaskTy->getVectorElementType()->isIntegerTy(8)) {\r
- int NumElements = MaskTy->getVectorNumElements();\r
- ShuffleMask.reserve(NumElements);\r
-\r
- for (int i = 0; i < NumElements; ++i) {\r
- // For AVX vectors with 32 bytes the base of the shuffle is the 16-byte\r
- // lane of the vector we're inside.\r
- int Base = i < 16 ? 0 : 16;\r
- Constant *COp = C->getAggregateElement(i);\r
- if (!COp) {\r
- ShuffleMask.clear();\r
- return;\r
- } else if (isa<UndefValue>(COp)) {\r
- ShuffleMask.push_back(SM_SentinelUndef);\r
- continue;\r
- }\r
- uint64_t Element = cast<ConstantInt>(COp)->getZExtValue();\r
- // If the high bit (7) of the byte is set, the element is zeroed.\r
- if (Element & (1 << 7))\r
- ShuffleMask.push_back(SM_SentinelZero);\r
- else {\r
- // Only the least significant 4 bits of the byte are used.\r
- int Index = Base + (Element & 0xf);\r
- ShuffleMask.push_back(Index);\r
- }\r
- }\r
- }\r
- // TODO: Handle funny-looking vectors too.\r
-}\r
-\r
-void DecodePSHUFBMask(ArrayRef<uint64_t> RawMask,\r
- SmallVectorImpl<int> &ShuffleMask) {\r
- for (int i = 0, e = RawMask.size(); i < e; ++i) {\r
- uint64_t M = RawMask[i];\r
- if (M == (uint64_t)SM_SentinelUndef) {\r
- ShuffleMask.push_back(M);\r
- continue;\r
- }\r
- // For AVX vectors with 32 bytes the base of the shuffle is the half of\r
- // the vector we're inside.\r
- int Base = i < 16 ? 0 : 16;\r
- // If the high bit (7) of the byte is set, the element is zeroed.\r
- if (M & (1 << 7))\r
- ShuffleMask.push_back(SM_SentinelZero);\r
- else {\r
- // Only the least significant 4 bits of the byte are used.\r
- int Index = Base + (M & 0xf);\r
- ShuffleMask.push_back(Index);\r
- }\r
- }\r
-}\r
-\r
-void DecodeBLENDMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask) {\r
- int ElementBits = VT.getScalarSizeInBits();\r
- int NumElements = VT.getVectorNumElements();\r
- for (int i = 0; i < NumElements; ++i) {\r
- // If there are more than 8 elements in the vector, then any immediate blend\r
- // mask applies to each 128-bit lane. There can never be more than\r
- // 8 elements in a 128-bit lane with an immediate blend.\r
- int Bit = NumElements > 8 ? i % (128 / ElementBits) : i;\r
- assert(Bit < 8 &&\r
- "Immediate blends only operate over 8 elements at a time!");\r
- ShuffleMask.push_back(((Imm >> Bit) & 1) ? NumElements + i : i);\r
- }\r
-}\r
-\r
-/// DecodeVPERMMask - this decodes the shuffle masks for VPERMQ/VPERMPD.\r
-/// No VT provided since it only works on 256-bit, 4 element vectors.\r
-void DecodeVPERMMask(unsigned Imm, SmallVectorImpl<int> &ShuffleMask) {\r
- for (unsigned i = 0; i != 4; ++i) {\r
- ShuffleMask.push_back((Imm >> (2*i)) & 3);\r
- }\r
-}\r
-\r
-void DecodeVPERMILPMask(const Constant *C, SmallVectorImpl<int> &ShuffleMask) {\r
- Type *MaskTy = C->getType();\r
- assert(MaskTy->isVectorTy() && "Expected a vector constant mask!");\r
- assert(MaskTy->getVectorElementType()->isIntegerTy() &&\r
- "Expected integer constant mask elements!");\r
- int ElementBits = MaskTy->getScalarSizeInBits();\r
- int NumElements = MaskTy->getVectorNumElements();\r
- assert((NumElements == 2 || NumElements == 4 || NumElements == 8) &&\r
- "Unexpected number of vector elements.");\r
- ShuffleMask.reserve(NumElements);\r
- if (auto *CDS = dyn_cast<ConstantDataSequential>(C)) {\r
- assert((unsigned)NumElements == CDS->getNumElements() &&\r
- "Constant mask has a different number of elements!");\r
-\r
- for (int i = 0; i < NumElements; ++i) {\r
- int Base = (i * ElementBits / 128) * (128 / ElementBits);\r
- uint64_t Element = CDS->getElementAsInteger(i);\r
- // Only the least significant 2 bits of the integer are used.\r
- int Index = Base + (Element & 0x3);\r
- ShuffleMask.push_back(Index);\r
- }\r
- } else if (auto *CV = dyn_cast<ConstantVector>(C)) {\r
- assert((unsigned)NumElements == C->getNumOperands() &&\r
- "Constant mask has a different number of elements!");\r
-\r
- for (int i = 0; i < NumElements; ++i) {\r
- int Base = (i * ElementBits / 128) * (128 / ElementBits);\r
- Constant *COp = CV->getOperand(i);\r
- if (isa<UndefValue>(COp)) {\r
- ShuffleMask.push_back(SM_SentinelUndef);\r
- continue;\r
- }\r
- uint64_t Element = cast<ConstantInt>(COp)->getZExtValue();\r
- // Only the least significant 2 bits of the integer are used.\r
- int Index = Base + (Element & 0x3);\r
- ShuffleMask.push_back(Index);\r
- }\r
- }\r
-}\r
-\r
-void DecodeZeroExtendMask(MVT SrcVT, MVT DstVT, SmallVectorImpl<int> &Mask) {\r
- unsigned NumDstElts = DstVT.getVectorNumElements();\r
- unsigned SrcScalarBits = SrcVT.getScalarSizeInBits();\r
- unsigned DstScalarBits = DstVT.getScalarSizeInBits();\r
- unsigned Scale = DstScalarBits / SrcScalarBits;\r
- assert(SrcScalarBits < DstScalarBits &&\r
- "Expected zero extension mask to increase scalar size");\r
- assert(SrcVT.getVectorNumElements() >= NumDstElts &&\r
- "Too many zero extension lanes");\r
-\r
- for (unsigned i = 0; i != NumDstElts; i++) {\r
- Mask.push_back(i);\r
- for (unsigned j = 1; j != Scale; j++)\r
- Mask.push_back(SM_SentinelZero);\r
- }\r
-}\r
-\r
-void DecodeZeroMoveLowMask(MVT VT, SmallVectorImpl<int> &ShuffleMask) {\r
- unsigned NumElts = VT.getVectorNumElements();\r
- ShuffleMask.push_back(0);\r
- for (unsigned i = 1; i < NumElts; i++)\r
- ShuffleMask.push_back(SM_SentinelZero);\r
-}\r
-\r
-void DecodeScalarMoveMask(MVT VT, bool IsLoad, SmallVectorImpl<int> &Mask) {\r
- // First element comes from the first element of second source.\r
- // Remaining elements: Load zero extends / Move copies from first source.\r
- unsigned NumElts = VT.getVectorNumElements();\r
- Mask.push_back(NumElts);\r
- for (unsigned i = 1; i < NumElts; i++)\r
- Mask.push_back(IsLoad ? SM_SentinelZero : i);\r
-}\r
-} // llvm namespace\r
+//===-- X86ShuffleDecode.cpp - X86 shuffle decode logic -------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Define several functions to decode x86 specific shuffle semantics into a
+// generic vector mask.
+//
+//===----------------------------------------------------------------------===//
+
+#include "X86ShuffleDecode.h"
+#include "llvm/IR/Constants.h"
+#include "llvm/CodeGen/MachineValueType.h"
+
+//===----------------------------------------------------------------------===//
+// Vector Mask Decoding
+//===----------------------------------------------------------------------===//
+
+namespace llvm {
+
+void DecodeINSERTPSMask(unsigned Imm, SmallVectorImpl<int> &ShuffleMask) {
+ // Defaults the copying the dest value.
+ ShuffleMask.push_back(0);
+ ShuffleMask.push_back(1);
+ ShuffleMask.push_back(2);
+ ShuffleMask.push_back(3);
+
+ // Decode the immediate.
+ unsigned ZMask = Imm & 15;
+ unsigned CountD = (Imm >> 4) & 3;
+ unsigned CountS = (Imm >> 6) & 3;
+
+ // CountS selects which input element to use.
+ unsigned InVal = 4 + CountS;
+ // CountD specifies which element of destination to update.
+ ShuffleMask[CountD] = InVal;
+ // ZMask zaps values, potentially overriding the CountD elt.
+ if (ZMask & 1) ShuffleMask[0] = SM_SentinelZero;
+ if (ZMask & 2) ShuffleMask[1] = SM_SentinelZero;
+ if (ZMask & 4) ShuffleMask[2] = SM_SentinelZero;
+ if (ZMask & 8) ShuffleMask[3] = SM_SentinelZero;
+}
+
+// <3,1> or <6,7,2,3>
+void DecodeMOVHLPSMask(unsigned NElts, SmallVectorImpl<int> &ShuffleMask) {
+ for (unsigned i = NElts / 2; i != NElts; ++i)
+ ShuffleMask.push_back(NElts + i);
+
+ for (unsigned i = NElts / 2; i != NElts; ++i)
+ ShuffleMask.push_back(i);
+}
+
+// <0,2> or <0,1,4,5>
+void DecodeMOVLHPSMask(unsigned NElts, SmallVectorImpl<int> &ShuffleMask) {
+ for (unsigned i = 0; i != NElts / 2; ++i)
+ ShuffleMask.push_back(i);
+
+ for (unsigned i = 0; i != NElts / 2; ++i)
+ ShuffleMask.push_back(NElts + i);
+}
+
+void DecodeMOVSLDUPMask(MVT VT, SmallVectorImpl<int> &ShuffleMask) {
+ unsigned NumElts = VT.getVectorNumElements();
+ for (int i = 0, e = NumElts / 2; i < e; ++i) {
+ ShuffleMask.push_back(2 * i);
+ ShuffleMask.push_back(2 * i);
+ }
+}
+
+void DecodeMOVSHDUPMask(MVT VT, SmallVectorImpl<int> &ShuffleMask) {
+ unsigned NumElts = VT.getVectorNumElements();
+ for (int i = 0, e = NumElts / 2; i < e; ++i) {
+ ShuffleMask.push_back(2 * i + 1);
+ ShuffleMask.push_back(2 * i + 1);
+ }
+}
+
+void DecodeMOVDDUPMask(MVT VT, SmallVectorImpl<int> &ShuffleMask) {
+ unsigned VectorSizeInBits = VT.getSizeInBits();
+ unsigned ScalarSizeInBits = VT.getScalarSizeInBits();
+ unsigned NumElts = VT.getVectorNumElements();
+ unsigned NumLanes = VectorSizeInBits / 128;
+ unsigned NumLaneElts = NumElts / NumLanes;
+ unsigned NumLaneSubElts = 64 / ScalarSizeInBits;
+
+ for (unsigned l = 0; l < NumElts; l += NumLaneElts)
+ for (unsigned i = 0; i < NumLaneElts; i += NumLaneSubElts)
+ for (unsigned s = 0; s != NumLaneSubElts; s++)
+ ShuffleMask.push_back(l + s);
+}
+
+void DecodePSLLDQMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask) {
+ unsigned VectorSizeInBits = VT.getSizeInBits();
+ unsigned NumElts = VectorSizeInBits / 8;
+ unsigned NumLanes = VectorSizeInBits / 128;
+ unsigned NumLaneElts = NumElts / NumLanes;
+
+ for (unsigned l = 0; l < NumElts; l += NumLaneElts)
+ for (unsigned i = 0; i < NumLaneElts; ++i) {
+ int M = SM_SentinelZero;
+ if (i >= Imm) M = i - Imm + l;
+ ShuffleMask.push_back(M);
+ }
+}
+
+void DecodePSRLDQMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask) {
+ unsigned VectorSizeInBits = VT.getSizeInBits();
+ unsigned NumElts = VectorSizeInBits / 8;
+ unsigned NumLanes = VectorSizeInBits / 128;
+ unsigned NumLaneElts = NumElts / NumLanes;
+
+ for (unsigned l = 0; l < NumElts; l += NumLaneElts)
+ for (unsigned i = 0; i < NumLaneElts; ++i) {
+ unsigned Base = i + Imm;
+ int M = Base + l;
+ if (Base >= NumLaneElts) M = SM_SentinelZero;
+ ShuffleMask.push_back(M);
+ }
+}
+
+void DecodePALIGNRMask(MVT VT, unsigned Imm,
+ SmallVectorImpl<int> &ShuffleMask) {
+ unsigned NumElts = VT.getVectorNumElements();
+ unsigned Offset = Imm * (VT.getVectorElementType().getSizeInBits() / 8);
+
+ unsigned NumLanes = VT.getSizeInBits() / 128;
+ unsigned NumLaneElts = NumElts / NumLanes;
+
+ for (unsigned l = 0; l != NumElts; l += NumLaneElts) {
+ for (unsigned i = 0; i != NumLaneElts; ++i) {
+ unsigned Base = i + Offset;
+ // if i+offset is out of this lane then we actually need the other source
+ if (Base >= NumLaneElts) Base += NumElts - NumLaneElts;
+ ShuffleMask.push_back(Base + l);
+ }
+ }
+}
+
+/// 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;
+ for (unsigned l = 0; l != NumElts; l += NumLaneElts) {
+ for (unsigned i = 0; i != NumLaneElts; ++i) {
+ ShuffleMask.push_back(NewImm % NumLaneElts + l);
+ NewImm /= NumLaneElts;
+ }
+ if (NumLaneElts == 4) NewImm = Imm; // reload imm
+ }
+}
+
+void DecodePSHUFHWMask(MVT VT, unsigned Imm,
+ SmallVectorImpl<int> &ShuffleMask) {
+ unsigned NumElts = VT.getVectorNumElements();
+
+ for (unsigned l = 0; l != NumElts; l += 8) {
+ unsigned NewImm = Imm;
+ for (unsigned i = 0, e = 4; i != e; ++i) {
+ ShuffleMask.push_back(l + i);
+ }
+ for (unsigned i = 4, e = 8; i != e; ++i) {
+ ShuffleMask.push_back(l + 4 + (NewImm & 3));
+ NewImm >>= 2;
+ }
+ }
+}
+
+void DecodePSHUFLWMask(MVT VT, unsigned Imm,
+ SmallVectorImpl<int> &ShuffleMask) {
+ unsigned NumElts = VT.getVectorNumElements();
+
+ for (unsigned l = 0; l != NumElts; l += 8) {
+ unsigned NewImm = Imm;
+ for (unsigned i = 0, e = 4; i != e; ++i) {
+ ShuffleMask.push_back(l + (NewImm & 3));
+ NewImm >>= 2;
+ }
+ for (unsigned i = 4, e = 8; i != e; ++i) {
+ ShuffleMask.push_back(l + i);
+ }
+ }
+}
+
+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.
+void DecodeSHUFPMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask) {
+ unsigned NumElts = VT.getVectorNumElements();
+
+ unsigned NumLanes = VT.getSizeInBits() / 128;
+ unsigned NumLaneElts = NumElts / NumLanes;
+
+ unsigned NewImm = Imm;
+ for (unsigned l = 0; l != NumElts; l += NumLaneElts) {
+ // each half of a lane comes from different source
+ for (unsigned s = 0; s != NumElts * 2; s += NumElts) {
+ for (unsigned i = 0; i != NumLaneElts / 2; ++i) {
+ ShuffleMask.push_back(NewImm % NumLaneElts + s + l);
+ NewImm /= NumLaneElts;
+ }
+ }
+ if (NumLaneElts == 4) NewImm = Imm; // reload imm
+ }
+}
+
+/// DecodeUNPCKHMask - This decodes the shuffle masks for unpckhps/unpckhpd
+/// and punpckh*. VT indicates the type of the vector allowing it to handle
+/// different datatypes and vector widths.
+void DecodeUNPCKHMask(MVT VT, SmallVectorImpl<int> &ShuffleMask) {
+ unsigned NumElts = VT.getVectorNumElements();
+
+ // 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
+ unsigned NumLaneElts = NumElts / NumLanes;
+
+ for (unsigned l = 0; l != NumElts; l += NumLaneElts) {
+ for (unsigned i = l + NumLaneElts / 2, e = l + NumLaneElts; i != e; ++i) {
+ ShuffleMask.push_back(i); // Reads from dest/src1
+ ShuffleMask.push_back(i + NumElts); // Reads from src/src2
+ }
+ }
+}
+
+/// DecodeUNPCKLMask - This decodes the shuffle masks for unpcklps/unpcklpd
+/// and punpckl*. VT indicates the type of the vector allowing it to handle
+/// different datatypes and vector widths.
+void DecodeUNPCKLMask(MVT VT, SmallVectorImpl<int> &ShuffleMask) {
+ unsigned NumElts = VT.getVectorNumElements();
+
+ // 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
+ unsigned NumLaneElts = NumElts / NumLanes;
+
+ for (unsigned l = 0; l != NumElts; l += NumLaneElts) {
+ for (unsigned i = l, e = l + NumLaneElts / 2; i != e; ++i) {
+ ShuffleMask.push_back(i); // Reads from dest/src1
+ ShuffleMask.push_back(i + NumElts); // Reads from src/src2
+ }
+ }
+}
+
+/// \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;
+
+ for (unsigned l = 0; l != 2; ++l) {
+ unsigned HalfMask = Imm >> (l * 4);
+ unsigned HalfBegin = (HalfMask & 0x3) * HalfSize;
+ for (unsigned i = HalfBegin, e = HalfBegin + HalfSize; i != e; ++i)
+ ShuffleMask.push_back(HalfMask & 8 ? SM_SentinelZero : (int)i);
+ }
+}
+
+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>
+
+#ifndef NDEBUG
+ unsigned MaskTySize = MaskTy->getPrimitiveSizeInBits();
+ assert(MaskTySize == 128 || MaskTySize == 256 || MaskTySize == 512);
+#endif
+
+ // 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 & ~0xf;
+ 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) {
+ uint64_t M = RawMask[i];
+ if (M == (uint64_t)SM_SentinelUndef) {
+ ShuffleMask.push_back(M);
+ continue;
+ }
+ // For AVX vectors with 32 bytes the base of the shuffle is the half of
+ // the vector we're inside.
+ int Base = i < 16 ? 0 : 16;
+ // If the high bit (7) of the byte is set, the element is zeroed.
+ if (M & (1 << 7))
+ ShuffleMask.push_back(SM_SentinelZero);
+ else {
+ // Only the least significant 4 bits of the byte are used.
+ int Index = Base + (M & 0xf);
+ ShuffleMask.push_back(Index);
+ }
+ }
+}
+
+void DecodeBLENDMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask) {
+ int ElementBits = VT.getScalarSizeInBits();
+ int NumElements = VT.getVectorNumElements();
+ for (int i = 0; i < NumElements; ++i) {
+ // If there are more than 8 elements in the vector, then any immediate blend
+ // mask applies to each 128-bit lane. There can never be more than
+ // 8 elements in a 128-bit lane with an immediate blend.
+ int Bit = NumElements > 8 ? i % (128 / ElementBits) : i;
+ assert(Bit < 8 &&
+ "Immediate blends only operate over 8 elements at a time!");
+ ShuffleMask.push_back(((Imm >> Bit) & 1) ? NumElements + i : i);
+ }
+}
+
+/// DecodeVPERMMask - this decodes the shuffle masks for VPERMQ/VPERMPD.
+/// No VT provided since it only works on 256-bit, 4 element vectors.
+void DecodeVPERMMask(unsigned Imm, SmallVectorImpl<int> &ShuffleMask) {
+ for (unsigned i = 0; i != 4; ++i) {
+ ShuffleMask.push_back((Imm >> (2 * i)) & 3);
+ }
+}
+
+void DecodeVPERMILPMask(const Constant *C, unsigned ElSize,
+ 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;
+
+ // Only support vector types.
+ if (!MaskTy->isVectorTy())
+ return;
+
+ // Make sure its an integer type.
+ Type *VecEltTy = MaskTy->getVectorElementType();
+ if (!VecEltTy->isIntegerTy())
+ return;
+
+ // Support any element type from byte up to element size.
+ // This is necesary primarily because 64-bit elements get split to 32-bit
+ // in the constant pool on 32-bit target.
+ unsigned EltTySize = VecEltTy->getIntegerBitWidth();
+ if (EltTySize < 8 || EltTySize > ElSize)
+ return;
+
+ unsigned NumElements = MaskTySize / ElSize;
+ assert((NumElements == 2 || NumElements == 4 || NumElements == 8) &&
+ "Unexpected number of vector elements.");
+ ShuffleMask.reserve(NumElements);
+ unsigned NumElementsPerLane = 128 / ElSize;
+ unsigned Factor = ElSize / EltTySize;
+
+ for (unsigned i = 0; i < NumElements; ++i) {
+ Constant *COp = C->getAggregateElement(i * Factor);
+ if (!COp) {
+ ShuffleMask.clear();
+ return;
+ } else if (isa<UndefValue>(COp)) {
+ ShuffleMask.push_back(SM_SentinelUndef);
+ continue;
+ }
+ int Index = i & ~(NumElementsPerLane - 1);
+ uint64_t Element = cast<ConstantInt>(COp)->getZExtValue();
+ if (ElSize == 64)
+ Index += (Element >> 1) & 0x1;
+ else
+ Index += Element & 0x3;
+ ShuffleMask.push_back(Index);
+ }
+
+ // TODO: Handle funny-looking vectors too.
+}
+
+void DecodeZeroExtendMask(MVT SrcVT, MVT DstVT, SmallVectorImpl<int> &Mask) {
+ unsigned NumDstElts = DstVT.getVectorNumElements();
+ unsigned SrcScalarBits = SrcVT.getScalarSizeInBits();
+ unsigned DstScalarBits = DstVT.getScalarSizeInBits();
+ unsigned Scale = DstScalarBits / SrcScalarBits;
+ assert(SrcScalarBits < DstScalarBits &&
+ "Expected zero extension mask to increase scalar size");
+ assert(SrcVT.getVectorNumElements() >= NumDstElts &&
+ "Too many zero extension lanes");
+
+ for (unsigned i = 0; i != NumDstElts; i++) {
+ Mask.push_back(i);
+ for (unsigned j = 1; j != Scale; j++)
+ Mask.push_back(SM_SentinelZero);
+ }
+}
+
+void DecodeZeroMoveLowMask(MVT VT, SmallVectorImpl<int> &ShuffleMask) {
+ unsigned NumElts = VT.getVectorNumElements();
+ ShuffleMask.push_back(0);
+ for (unsigned i = 1; i < NumElts; i++)
+ ShuffleMask.push_back(SM_SentinelZero);
+}
+
+void DecodeScalarMoveMask(MVT VT, bool IsLoad, SmallVectorImpl<int> &Mask) {
+ // First element comes from the first element of second source.
+ // Remaining elements: Load zero extends / Move copies from first source.
+ unsigned NumElts = VT.getVectorNumElements();
+ Mask.push_back(NumElts);
+ 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
projects / oota-llvm.git / blobdiff