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-rw-r--r--lib/Target/CellSPU/SPUISelDAGToDAG.cpp411
1 files changed, 248 insertions, 163 deletions
diff --git a/lib/Target/CellSPU/SPUISelDAGToDAG.cpp b/lib/Target/CellSPU/SPUISelDAGToDAG.cpp
index 73607bf251..d148622009 100644
--- a/lib/Target/CellSPU/SPUISelDAGToDAG.cpp
+++ b/lib/Target/CellSPU/SPUISelDAGToDAG.cpp
@@ -200,182 +200,212 @@ namespace {
return retval;
}
-}
-namespace {
+ //! Generate the carry-generate shuffle mask.
+ SDValue getCarryGenerateShufMask(SelectionDAG &DAG, DebugLoc dl) {
+ SmallVector<SDValue, 16 > ShufBytes;
-//===--------------------------------------------------------------------===//
-/// SPUDAGToDAGISel - Cell SPU-specific code to select SPU machine
-/// instructions for SelectionDAG operations.
-///
-class SPUDAGToDAGISel :
- public SelectionDAGISel
-{
- SPUTargetMachine &TM;
- SPUTargetLowering &SPUtli;
- unsigned GlobalBaseReg;
-
-public:
- explicit SPUDAGToDAGISel(SPUTargetMachine &tm) :
- SelectionDAGISel(tm),
- TM(tm),
- SPUtli(*tm.getTargetLowering())
- { }
-
- virtual bool runOnFunction(Function &Fn) {
- // Make sure we re-emit a set of the global base reg if necessary
- GlobalBaseReg = 0;
- SelectionDAGISel::runOnFunction(Fn);
- return true;
- }
+ // Create the shuffle mask for "rotating" the borrow up one register slot
+ // once the borrow is generated.
+ ShufBytes.push_back(DAG.getConstant(0x04050607, MVT::i32));
+ ShufBytes.push_back(DAG.getConstant(0x80808080, MVT::i32));
+ ShufBytes.push_back(DAG.getConstant(0x0c0d0e0f, MVT::i32));
+ ShufBytes.push_back(DAG.getConstant(0x80808080, MVT::i32));
- /// getI32Imm - Return a target constant with the specified value, of type
- /// i32.
- inline SDValue getI32Imm(uint32_t Imm) {
- return CurDAG->getTargetConstant(Imm, MVT::i32);
+ return DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32,
+ &ShufBytes[0], ShufBytes.size());
}
- /// getI64Imm - Return a target constant with the specified value, of type
- /// i64.
- inline SDValue getI64Imm(uint64_t Imm) {
- return CurDAG->getTargetConstant(Imm, MVT::i64);
+ //! Generate the borrow-generate shuffle mask
+ SDValue getBorrowGenerateShufMask(SelectionDAG &DAG, DebugLoc dl) {
+ SmallVector<SDValue, 16 > ShufBytes;
+
+ // Create the shuffle mask for "rotating" the borrow up one register slot
+ // once the borrow is generated.
+ ShufBytes.push_back(DAG.getConstant(0x04050607, MVT::i32));
+ ShufBytes.push_back(DAG.getConstant(0xc0c0c0c0, MVT::i32));
+ ShufBytes.push_back(DAG.getConstant(0x0c0d0e0f, MVT::i32));
+ ShufBytes.push_back(DAG.getConstant(0xc0c0c0c0, MVT::i32));
+
+ return DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32,
+ &ShufBytes[0], ShufBytes.size());
}
- /// getSmallIPtrImm - Return a target constant of pointer type.
- inline SDValue getSmallIPtrImm(unsigned Imm) {
- return CurDAG->getTargetConstant(Imm, SPUtli.getPointerTy());
+ //===------------------------------------------------------------------===//
+ /// SPUDAGToDAGISel - Cell SPU-specific code to select SPU machine
+ /// instructions for SelectionDAG operations.
+ ///
+ class SPUDAGToDAGISel :
+ public SelectionDAGISel
+ {
+ SPUTargetMachine &TM;
+ SPUTargetLowering &SPUtli;
+ unsigned GlobalBaseReg;
+
+ public:
+ explicit SPUDAGToDAGISel(SPUTargetMachine &tm) :
+ SelectionDAGISel(tm),
+ TM(tm),
+ SPUtli(*tm.getTargetLowering())
+ { }
+
+ virtual bool runOnFunction(Function &Fn) {
+ // Make sure we re-emit a set of the global base reg if necessary
+ GlobalBaseReg = 0;
+ SelectionDAGISel::runOnFunction(Fn);
+ return true;
}
- SDNode *emitBuildVector(SDValue build_vec) {
- MVT vecVT = build_vec.getValueType();
- SDNode *bvNode = build_vec.getNode();
- DebugLoc dl = bvNode->getDebugLoc();
-
- // Check to see if this vector can be represented as a CellSPU immediate
- // constant by invoking all of the instruction selection predicates:
- if (((vecVT == MVT::v8i16) &&
- (SPU::get_vec_i16imm(bvNode, *CurDAG, MVT::i16).getNode() != 0)) ||
- ((vecVT == MVT::v4i32) &&
- ((SPU::get_vec_i16imm(bvNode, *CurDAG, MVT::i32).getNode() != 0) ||
- (SPU::get_ILHUvec_imm(bvNode, *CurDAG, MVT::i32).getNode() != 0) ||
- (SPU::get_vec_u18imm(bvNode, *CurDAG, MVT::i32).getNode() != 0) ||
- (SPU::get_v4i32_imm(bvNode, *CurDAG).getNode() != 0))) ||
- ((vecVT == MVT::v2i64) &&
- ((SPU::get_vec_i16imm(bvNode, *CurDAG, MVT::i64).getNode() != 0) ||
- (SPU::get_ILHUvec_imm(bvNode, *CurDAG, MVT::i64).getNode() != 0) ||
- (SPU::get_vec_u18imm(bvNode, *CurDAG, MVT::i64).getNode() != 0))))
- return Select(build_vec);
-
- // No, need to emit a constant pool spill:
- std::vector<Constant*> CV;
-
- for (size_t i = 0; i < build_vec.getNumOperands(); ++i) {
- ConstantSDNode *V = dyn_cast<ConstantSDNode > (build_vec.getOperand(i));
- CV.push_back(const_cast<ConstantInt *> (V->getConstantIntValue()));
+ /// getI32Imm - Return a target constant with the specified value, of type
+ /// i32.
+ inline SDValue getI32Imm(uint32_t Imm) {
+ return CurDAG->getTargetConstant(Imm, MVT::i32);
}
- Constant *CP = ConstantVector::get(CV);
- SDValue CPIdx = CurDAG->getConstantPool(CP, SPUtli.getPointerTy());
- unsigned Alignment = cast<ConstantPoolSDNode>(CPIdx)->getAlignment();
- SDValue CGPoolOffset =
- SPU::LowerConstantPool(CPIdx, *CurDAG,
- SPUtli.getSPUTargetMachine());
- return SelectCode(CurDAG->getLoad(build_vec.getValueType(), dl,
- CurDAG->getEntryNode(), CGPoolOffset,
- PseudoSourceValue::getConstantPool(), 0,
- false, Alignment));
- }
+ /// getI64Imm - Return a target constant with the specified value, of type
+ /// i64.
+ inline SDValue getI64Imm(uint64_t Imm) {
+ return CurDAG->getTargetConstant(Imm, MVT::i64);
+ }
- /// Select - Convert the specified operand from a target-independent to a
- /// target-specific node if it hasn't already been changed.
- SDNode *Select(SDValue Op);
-
- //! Emit the instruction sequence for i64 shl
- SDNode *SelectSHLi64(SDValue &Op, MVT OpVT);
-
- //! Emit the instruction sequence for i64 srl
- SDNode *SelectSRLi64(SDValue &Op, MVT OpVT);
-
- //! Emit the instruction sequence for i64 sra
- SDNode *SelectSRAi64(SDValue &Op, MVT OpVT);
-
- //! Emit the necessary sequence for loading i64 constants:
- SDNode *SelectI64Constant(SDValue &Op, MVT OpVT);
-
- //! Returns true if the address N is an A-form (local store) address
- bool SelectAFormAddr(SDValue Op, SDValue N, SDValue &Base,
- SDValue &Index);
-
- //! D-form address predicate
- bool SelectDFormAddr(SDValue Op, SDValue N, SDValue &Base,
- SDValue &Index);
-
- /// Alternate D-form address using i7 offset predicate
- bool SelectDForm2Addr(SDValue Op, SDValue N, SDValue &Disp,
- SDValue &Base);
-
- /// D-form address selection workhorse
- bool DFormAddressPredicate(SDValue Op, SDValue N, SDValue &Disp,
- SDValue &Base, int minOffset, int maxOffset);
-
- //! Address predicate if N can be expressed as an indexed [r+r] operation.
- bool SelectXFormAddr(SDValue Op, SDValue N, SDValue &Base,
- SDValue &Index);
-
- /// SelectInlineAsmMemoryOperand - Implement addressing mode selection for
- /// inline asm expressions.
- virtual bool SelectInlineAsmMemoryOperand(const SDValue &Op,
- char ConstraintCode,
- std::vector<SDValue> &OutOps) {
- SDValue Op0, Op1;
- switch (ConstraintCode) {
- default: return true;
- case 'm': // memory
- if (!SelectDFormAddr(Op, Op, Op0, Op1)
- && !SelectAFormAddr(Op, Op, Op0, Op1))
- SelectXFormAddr(Op, Op, Op0, Op1);
- break;
- case 'o': // offsetable
- if (!SelectDFormAddr(Op, Op, Op0, Op1)
- && !SelectAFormAddr(Op, Op, Op0, Op1)) {
- Op0 = Op;
- Op1 = getSmallIPtrImm(0);
+ /// getSmallIPtrImm - Return a target constant of pointer type.
+ inline SDValue getSmallIPtrImm(unsigned Imm) {
+ return CurDAG->getTargetConstant(Imm, SPUtli.getPointerTy());
}
- break;
- case 'v': // not offsetable
+
+ SDNode *emitBuildVector(SDValue build_vec) {
+ MVT vecVT = build_vec.getValueType();
+ MVT eltVT = vecVT.getVectorElementType();
+ SDNode *bvNode = build_vec.getNode();
+ DebugLoc dl = bvNode->getDebugLoc();
+
+ // Check to see if this vector can be represented as a CellSPU immediate
+ // constant by invoking all of the instruction selection predicates:
+ if (((vecVT == MVT::v8i16) &&
+ (SPU::get_vec_i16imm(bvNode, *CurDAG, MVT::i16).getNode() != 0)) ||
+ ((vecVT == MVT::v4i32) &&
+ ((SPU::get_vec_i16imm(bvNode, *CurDAG, MVT::i32).getNode() != 0) ||
+ (SPU::get_ILHUvec_imm(bvNode, *CurDAG, MVT::i32).getNode() != 0) ||
+ (SPU::get_vec_u18imm(bvNode, *CurDAG, MVT::i32).getNode() != 0) ||
+ (SPU::get_v4i32_imm(bvNode, *CurDAG).getNode() != 0))) ||
+ ((vecVT == MVT::v2i64) &&
+ ((SPU::get_vec_i16imm(bvNode, *CurDAG, MVT::i64).getNode() != 0) ||
+ (SPU::get_ILHUvec_imm(bvNode, *CurDAG, MVT::i64).getNode() != 0) ||
+ (SPU::get_vec_u18imm(bvNode, *CurDAG, MVT::i64).getNode() != 0))))
+ return Select(build_vec);
+
+ // No, need to emit a constant pool spill:
+ std::vector<Constant*> CV;
+
+ for (size_t i = 0; i < build_vec.getNumOperands(); ++i) {
+ ConstantSDNode *V = dyn_cast<ConstantSDNode > (build_vec.getOperand(i));
+ CV.push_back(const_cast<ConstantInt *> (V->getConstantIntValue()));
+ }
+
+ Constant *CP = ConstantVector::get(CV);
+ SDValue CPIdx = CurDAG->getConstantPool(CP, SPUtli.getPointerTy());
+ unsigned Alignment = cast<ConstantPoolSDNode>(CPIdx)->getAlignment();
+ SDValue CGPoolOffset =
+ SPU::LowerConstantPool(CPIdx, *CurDAG,
+ SPUtli.getSPUTargetMachine());
+ return SelectCode(CurDAG->getLoad(build_vec.getValueType(), dl,
+ CurDAG->getEntryNode(), CGPoolOffset,
+ PseudoSourceValue::getConstantPool(), 0,
+ false, Alignment));
+ }
+
+ /// Select - Convert the specified operand from a target-independent to a
+ /// target-specific node if it hasn't already been changed.
+ SDNode *Select(SDValue Op);
+
+ //! Emit the instruction sequence for i64 shl
+ SDNode *SelectSHLi64(SDValue &Op, MVT OpVT);
+
+ //! Emit the instruction sequence for i64 srl
+ SDNode *SelectSRLi64(SDValue &Op, MVT OpVT);
+
+ //! Emit the instruction sequence for i64 sra
+ SDNode *SelectSRAi64(SDValue &Op, MVT OpVT);
+
+ //! Emit the necessary sequence for loading i64 constants:
+ SDNode *SelectI64Constant(SDValue &Op, MVT OpVT, DebugLoc dl);
+
+ //! Alternate instruction emit sequence for loading i64 constants
+ SDNode *SelectI64Constant(uint64_t i64const, MVT OpVT, DebugLoc dl);
+
+ //! Returns true if the address N is an A-form (local store) address
+ bool SelectAFormAddr(SDValue Op, SDValue N, SDValue &Base,
+ SDValue &Index);
+
+ //! D-form address predicate
+ bool SelectDFormAddr(SDValue Op, SDValue N, SDValue &Base,
+ SDValue &Index);
+
+ /// Alternate D-form address using i7 offset predicate
+ bool SelectDForm2Addr(SDValue Op, SDValue N, SDValue &Disp,
+ SDValue &Base);
+
+ /// D-form address selection workhorse
+ bool DFormAddressPredicate(SDValue Op, SDValue N, SDValue &Disp,
+ SDValue &Base, int minOffset, int maxOffset);
+
+ //! Address predicate if N can be expressed as an indexed [r+r] operation.
+ bool SelectXFormAddr(SDValue Op, SDValue N, SDValue &Base,
+ SDValue &Index);
+
+ /// SelectInlineAsmMemoryOperand - Implement addressing mode selection for
+ /// inline asm expressions.
+ virtual bool SelectInlineAsmMemoryOperand(const SDValue &Op,
+ char ConstraintCode,
+ std::vector<SDValue> &OutOps) {
+ SDValue Op0, Op1;
+ switch (ConstraintCode) {
+ default: return true;
+ case 'm': // memory
+ if (!SelectDFormAddr(Op, Op, Op0, Op1)
+ && !SelectAFormAddr(Op, Op, Op0, Op1))
+ SelectXFormAddr(Op, Op, Op0, Op1);
+ break;
+ case 'o': // offsetable
+ if (!SelectDFormAddr(Op, Op, Op0, Op1)
+ && !SelectAFormAddr(Op, Op, Op0, Op1)) {
+ Op0 = Op;
+ Op1 = getSmallIPtrImm(0);
+ }
+ break;
+ case 'v': // not offsetable
#if 1
- assert(0 && "InlineAsmMemoryOperand 'v' constraint not handled.");
+ assert(0 && "InlineAsmMemoryOperand 'v' constraint not handled.");
#else
- SelectAddrIdxOnly(Op, Op, Op0, Op1);
+ SelectAddrIdxOnly(Op, Op, Op0, Op1);
#endif
- break;
- }
+ break;
+ }
- OutOps.push_back(Op0);
- OutOps.push_back(Op1);
- return false;
- }
+ OutOps.push_back(Op0);
+ OutOps.push_back(Op1);
+ return false;
+ }
- /// InstructionSelect - This callback is invoked by
- /// SelectionDAGISel when it has created a SelectionDAG for us to codegen.
- virtual void InstructionSelect();
+ /// InstructionSelect - This callback is invoked by
+ /// SelectionDAGISel when it has created a SelectionDAG for us to codegen.
+ virtual void InstructionSelect();
- virtual const char *getPassName() const {
- return "Cell SPU DAG->DAG Pattern Instruction Selection";
- }
+ virtual const char *getPassName() const {
+ return "Cell SPU DAG->DAG Pattern Instruction Selection";
+ }
- /// CreateTargetHazardRecognizer - Return the hazard recognizer to use for
- /// this target when scheduling the DAG.
- virtual ScheduleHazardRecognizer *CreateTargetHazardRecognizer() {
- const TargetInstrInfo *II = TM.getInstrInfo();
- assert(II && "No InstrInfo?");
- return new SPUHazardRecognizer(*II);
- }
+ /// CreateTargetHazardRecognizer - Return the hazard recognizer to use for
+ /// this target when scheduling the DAG.
+ virtual ScheduleHazardRecognizer *CreateTargetHazardRecognizer() {
+ const TargetInstrInfo *II = TM.getInstrInfo();
+ assert(II && "No InstrInfo?");
+ return new SPUHazardRecognizer(*II);
+ }
- // Include the pieces autogenerated from the target description.
+ // Include the pieces autogenerated from the target description.
#include "SPUGenDAGISel.inc"
-};
-
+ };
}
/// InstructionSelect - This callback is invoked by
@@ -689,7 +719,7 @@ SPUDAGToDAGISel::Select(SDValue Op) {
// Catch the i64 constants that end up here. Note: The backend doesn't
// attempt to legalize the constant (it's useless because DAGCombiner
// will insert 64-bit constants and we can't stop it).
- return SelectI64Constant(Op, OpVT);
+ return SelectI64Constant(Op, OpVT, Op.getDebugLoc());
} else if ((Opc == ISD::ZERO_EXTEND || Opc == ISD::ANY_EXTEND)
&& OpVT == MVT::i64) {
SDValue Op0 = Op.getOperand(0);
@@ -747,21 +777,21 @@ SPUDAGToDAGISel::Select(SDValue Op) {
zextShuffle));
} else if (Opc == ISD::ADD && (OpVT == MVT::i64 || OpVT == MVT::v2i64)) {
SDNode *CGLoad =
- emitBuildVector(SPU::getCarryGenerateShufMask(*CurDAG, dl));
+ emitBuildVector(getCarryGenerateShufMask(*CurDAG, dl));
return SelectCode(CurDAG->getNode(SPUISD::ADD64_MARKER, dl, OpVT,
Op.getOperand(0), Op.getOperand(1),
SDValue(CGLoad, 0)));
} else if (Opc == ISD::SUB && (OpVT == MVT::i64 || OpVT == MVT::v2i64)) {
SDNode *CGLoad =
- emitBuildVector(SPU::getBorrowGenerateShufMask(*CurDAG, dl));
+ emitBuildVector(getBorrowGenerateShufMask(*CurDAG, dl));
return SelectCode(CurDAG->getNode(SPUISD::SUB64_MARKER, dl, OpVT,
Op.getOperand(0), Op.getOperand(1),
SDValue(CGLoad, 0)));
} else if (Opc == ISD::MUL && (OpVT == MVT::i64 || OpVT == MVT::v2i64)) {
SDNode *CGLoad =
- emitBuildVector(SPU::getCarryGenerateShufMask(*CurDAG, dl));
+ emitBuildVector(getCarryGenerateShufMask(*CurDAG, dl));
return SelectCode(CurDAG->getNode(SPUISD::MUL64_MARKER, dl, OpVT,
Op.getOperand(0), Op.getOperand(1),
@@ -813,6 +843,54 @@ SPUDAGToDAGISel::Select(SDValue Op) {
if (OpVT == MVT::i64) {
return SelectSRAi64(Op, OpVT);
}
+ } else if (Opc == ISD::FNEG
+ && (OpVT == MVT::f64 || OpVT == MVT::v2f64)) {
+ DebugLoc dl = Op.getDebugLoc();
+ // Check if the pattern is a special form of DFNMS:
+ // (fneg (fsub (fmul R64FP:$rA, R64FP:$rB), R64FP:$rC))
+ SDValue Op0 = Op.getOperand(0);
+ if (Op0.getOpcode() == ISD::FSUB) {
+ SDValue Op00 = Op0.getOperand(0);
+ if (Op00.getOpcode() == ISD::FMUL) {
+ unsigned Opc = SPU::DFNMSf64;
+ if (OpVT == MVT::v2f64)
+ Opc = SPU::DFNMSv2f64;
+
+ return CurDAG->getTargetNode(Opc, dl, OpVT,
+ Op00.getOperand(0),
+ Op00.getOperand(1),
+ Op0.getOperand(1));
+ }
+ }
+
+ SDValue negConst = CurDAG->getConstant(0x8000000000000000ULL, MVT::i64);
+ SDNode *signMask = 0;
+ unsigned Opc = SPU::ORfneg64;
+
+ if (OpVT == MVT::f64) {
+ signMask = SelectI64Constant(negConst, MVT::i64, dl);
+ } else if (OpVT == MVT::v2f64) {
+ Opc = SPU::ORfnegvec;
+ signMask = emitBuildVector(CurDAG->getNode(ISD::BUILD_VECTOR, dl,
+ MVT::v2i64,
+ negConst, negConst));
+ }
+
+ return CurDAG->getTargetNode(Opc, dl, OpVT,
+ Op.getOperand(0), SDValue(signMask, 0));
+ } else if (Opc == ISD::FABS) {
+ if (OpVT == MVT::f64) {
+ SDNode *signMask = SelectI64Constant(0x7fffffffffffffffULL, MVT::i64, dl);
+ return CurDAG->getTargetNode(SPU::ANDfabs64, dl, OpVT,
+ Op.getOperand(0), SDValue(signMask, 0));
+ } else if (OpVT == MVT::v2f64) {
+ SDValue absConst = CurDAG->getConstant(0x7fffffffffffffffULL, MVT::i64);
+ SDValue absVec = CurDAG->getNode(ISD::BUILD_VECTOR, dl, MVT::v2i64,
+ absConst, absConst);
+ SDNode *signMask = emitBuildVector(absVec);
+ return CurDAG->getTargetNode(SPU::ANDfabsvec, dl, OpVT,
+ Op.getOperand(0), SDValue(signMask, 0));
+ }
} else if (Opc == SPUISD::LDRESULT) {
// Custom select instructions for LDRESULT
MVT VT = N->getValueType(0);
@@ -1087,13 +1165,17 @@ SPUDAGToDAGISel::SelectSRAi64(SDValue &Op, MVT OpVT) {
/*!
Do the necessary magic necessary to load a i64 constant
*/
-SDNode *SPUDAGToDAGISel::SelectI64Constant(SDValue& Op, MVT OpVT) {
+SDNode *SPUDAGToDAGISel::SelectI64Constant(SDValue& Op, MVT OpVT,
+ DebugLoc dl) {
ConstantSDNode *CN = cast<ConstantSDNode>(Op.getNode());
- // Currently there's no DL on the input, but won't hurt to pretend.
- DebugLoc dl = Op.getDebugLoc();
+ return SelectI64Constant(CN->getZExtValue(), OpVT, dl);
+}
+
+SDNode *SPUDAGToDAGISel::SelectI64Constant(uint64_t Value64, MVT OpVT,
+ DebugLoc dl) {
MVT OpVecVT = MVT::getVectorVT(OpVT, 2);
SDValue i64vec =
- SPU::LowerSplat_v2i64(OpVecVT, *CurDAG, CN->getZExtValue(), dl);
+ SPU::LowerV2I64Splat(OpVecVT, *CurDAG, Value64, dl);
// Here's where it gets interesting, because we have to parse out the
// subtree handed back in i64vec:
@@ -1143,8 +1225,11 @@ SDNode *SPUDAGToDAGISel::SelectI64Constant(SDValue& Op, MVT OpVT) {
SDValue(lhsNode, 0), SDValue(rhsNode, 0),
SDValue(shufMaskNode, 0)));
- return CurDAG->getTargetNode(SPU::ORi64_v2i64, dl, OpVT,
+ return CurDAG->getTargetNode(SPU::ORi64_v2i64, dl, OpVT,
SDValue(shufNode, 0));
+ } else if (i64vec.getOpcode() == ISD::BUILD_VECTOR) {
+ return CurDAG->getTargetNode(SPU::ORi64_v2i64, dl, OpVT,
+ SDValue(emitBuildVector(i64vec), 0));
} else {
cerr << "SPUDAGToDAGISel::SelectI64Constant: Unhandled i64vec condition\n";
abort();
generated by cgit v1.2.3 (git 2.25.1) at 2025-07-18 20:10:30 +0000