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139 lines
6.0 KiB
C++
139 lines
6.0 KiB
C++
//===-- SPUISelLowering.h - Cell SPU DAG Lowering Interface -----*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by a team from the Computer Systems Research
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// Department at The Aerospace Corporation and is distributed under the
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// University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the interfaces that Cell SPU uses to lower LLVM code into
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// a selection DAG.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SPU_ISELLOWERING_H
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#define SPU_ISELLOWERING_H
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#include "llvm/Target/TargetLowering.h"
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#include "llvm/CodeGen/SelectionDAG.h"
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#include "SPU.h"
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namespace llvm {
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namespace SPUISD {
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enum NodeType {
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// Start the numbering where the builting ops and target ops leave off.
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FIRST_NUMBER = ISD::BUILTIN_OP_END+SPU::INSTRUCTION_LIST_END,
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// Pseudo instructions:
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RET_FLAG, ///< Return with flag, matched by bi instruction
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Hi, ///< High address component (upper 16)
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Lo, ///< Low address component (lower 16)
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PCRelAddr, ///< Program counter relative address
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DFormAddr, ///< D-Form address "imm($r)"
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XFormAddr, ///< X-Form address "$r1($r2)"
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LDRESULT, ///< Load result (value, chain)
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CALL, ///< CALL instruction
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SHUFB, ///< Vector shuffle (permute)
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INSERT_MASK, ///< Insert element shuffle mask
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CNTB, ///< Count leading ones in bytes
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PROMOTE_SCALAR, ///< Promote scalar->vector
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EXTRACT_ELT0, ///< Extract element 0
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EXTRACT_ELT0_CHAINED, ///< Extract element 0, with chain
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EXTRACT_I1_ZEXT, ///< Extract element 0 as i1, zero extend
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EXTRACT_I1_SEXT, ///< Extract element 0 as i1, sign extend
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EXTRACT_I8_ZEXT, ///< Extract element 0 as i8, zero extend
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EXTRACT_I8_SEXT, ///< Extract element 0 as i8, sign extend
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MPY, ///< 16-bit Multiply (low parts of a 32-bit)
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MPYU, ///< Multiply Unsigned
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MPYH, ///< Multiply High
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MPYHH, ///< Multiply High-High
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VEC_SHL, ///< Vector shift left
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VEC_SRL, ///< Vector shift right (logical)
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VEC_SRA, ///< Vector shift right (arithmetic)
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VEC_ROTL, ///< Vector rotate left
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VEC_ROTR, ///< Vector rotate right
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ROTBYTES_RIGHT_Z, ///< Vector rotate right, by bytes, zero fill
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ROTBYTES_RIGHT_S, ///< Vector rotate right, by bytes, sign fill
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ROTBYTES_LEFT, ///< Rotate bytes (loads -> ROTQBYI)
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ROTBYTES_LEFT_CHAINED, ///< Rotate bytes (loads -> ROTQBYI), with chain
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FSMBI, ///< Form Select Mask for Bytes, Immediate
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SELB, ///< Select bits -> (b & mask) | (a & ~mask)
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SFPConstant, ///< Single precision floating point constant
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FPInterp, ///< Floating point interpolate
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FPRecipEst, ///< Floating point reciprocal estimate
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SEXT32TO64, ///< Sign-extended 32-bit const -> 64-bits
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LAST_SPUISD ///< Last user-defined instruction
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};
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}
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/// Predicates that are used for node matching:
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namespace SPU {
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SDOperand get_vec_u18imm(SDNode *N, SelectionDAG &DAG,
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MVT::ValueType ValueType);
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SDOperand get_vec_i16imm(SDNode *N, SelectionDAG &DAG,
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MVT::ValueType ValueType);
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SDOperand get_vec_i10imm(SDNode *N, SelectionDAG &DAG,
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MVT::ValueType ValueType);
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SDOperand get_vec_i8imm(SDNode *N, SelectionDAG &DAG,
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MVT::ValueType ValueType);
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SDOperand get_ILHUvec_imm(SDNode *N, SelectionDAG &DAG,
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MVT::ValueType ValueType);
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SDOperand get_v4i32_imm(SDNode *N, SelectionDAG &DAG);
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SDOperand get_v2i64_imm(SDNode *N, SelectionDAG &DAG);
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}
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class SPUTargetMachine; // forward dec'l.
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class SPUTargetLowering :
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public TargetLowering
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{
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int VarArgsFrameIndex; // FrameIndex for start of varargs area.
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int ReturnAddrIndex; // FrameIndex for return slot.
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SPUTargetMachine &SPUTM;
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public:
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SPUTargetLowering(SPUTargetMachine &TM);
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/// getTargetNodeName() - This method returns the name of a target specific
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/// DAG node.
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virtual const char *getTargetNodeName(unsigned Opcode) const;
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/// LowerOperation - Provide custom lowering hooks for some operations.
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///
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virtual SDOperand LowerOperation(SDOperand Op, SelectionDAG &DAG);
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virtual SDOperand PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const;
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virtual void computeMaskedBitsForTargetNode(const SDOperand Op,
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uint64_t Mask,
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uint64_t &KnownZero,
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uint64_t &KnownOne,
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const SelectionDAG &DAG,
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unsigned Depth = 0) const;
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virtual MachineBasicBlock *InsertAtEndOfBasicBlock(MachineInstr *MI,
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MachineBasicBlock *MBB);
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ConstraintType getConstraintType(const std::string &ConstraintLetter) const;
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std::pair<unsigned, const TargetRegisterClass*>
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getRegForInlineAsmConstraint(const std::string &Constraint,
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MVT::ValueType VT) const;
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void LowerAsmOperandForConstraint(SDOperand Op, char ConstraintLetter,
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std::vector<SDOperand> &Ops,
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SelectionDAG &DAG);
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/// isLegalAddressImmediate - Return true if the integer value can be used
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/// as the offset of the target addressing mode.
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virtual bool isLegalAddressImmediate(int64_t V, const Type *Ty) const;
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virtual bool isLegalAddressImmediate(GlobalValue *) const;
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};
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}
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#endif
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