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author | Sanjiv Gupta <sanjiv.gupta@microchip.com> | 2008-11-19 11:00:54 +0000 |
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committer | Sanjiv Gupta <sanjiv.gupta@microchip.com> | 2008-11-19 11:00:54 +0000 |
commit | 085ae4ff5f4b703a03668ffd130e204791e9a876 (patch) | |
tree | 50927bf30fff92fd28b11b51e72002f26cad7a61 /lib/Target/PIC16/PIC16ISelLowering.h | |
parent | 5f334804a5042a5467cd52202f0294ed66c96095 (diff) | |
download | external_llvm-085ae4ff5f4b703a03668ffd130e204791e9a876.zip external_llvm-085ae4ff5f4b703a03668ffd130e204791e9a876.tar.gz external_llvm-085ae4ff5f4b703a03668ffd130e204791e9a876.tar.bz2 |
Added a more function PIC16 backend. However to get this working a patch in
ExpandIntegerOperand (LegalizeIntegerTypes.cpp) is needed which is yet to be reworked and submitted.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59617 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/PIC16/PIC16ISelLowering.h')
-rw-r--r-- | lib/Target/PIC16/PIC16ISelLowering.h | 123 |
1 files changed, 73 insertions, 50 deletions
diff --git a/lib/Target/PIC16/PIC16ISelLowering.h b/lib/Target/PIC16/PIC16ISelLowering.h index e14a0c2..dfe5b5f 100644 --- a/lib/Target/PIC16/PIC16ISelLowering.h +++ b/lib/Target/PIC16/PIC16ISelLowering.h @@ -26,66 +26,89 @@ namespace llvm { // Start the numbering from where ISD NodeType finishes. FIRST_NUMBER = ISD::BUILTIN_OP_END, - // used for encapsulating the expanded nodes into one node. - Package, - - // Get the Higher 16 bits from a 32-bit immediate - Hi, - - // Get the Lower 16 bits from a 32-bit immediate - Lo, - - Cmp, // PIC16 Generic Comparison instruction. - Branch, // PIC16 Generic Branch Instruction. - BTFSS, // PIC16 BitTest Instruction (Skip if set). - BTFSC, // PIC16 BitTest Instruction (Skip if clear). - - // PIC16 comparison to be converted to either XOR or SUB - // Following instructions cater to those convertions. - XORCC, - SUBCC, - - // Get the Global Address wrapped into a wrapper that also captures - // the bank or page. - Wrapper, - SetBank, - SetPage + Lo, // Low 8-bits of GlobalAddress. + Hi, // High 8-bits of GlobalAddress. + PIC16Load, + PIC16Store, + Banksel, + MTLO, + MTHI, + BCF, + LSLF, // PIC16 Logical shift left + LRLF, // PIC16 Logical shift right + RLF, // Rotate left through carry + RRF, // Rotate right through carry + Dummy + }; + + // Keep track of different address spaces. + enum AddressSpace { + RAM_SPACE = 0, // RAM address space + ROM_SPACE = 1 // ROM address space number is 1 }; } //===--------------------------------------------------------------------===// // TargetLowering Implementation //===--------------------------------------------------------------------===// - class PIC16TargetLowering : public TargetLowering - { + class PIC16TargetLowering : public TargetLowering { public: - typedef std::map<SDNode *, SDNode *> NodeMap_t; - explicit PIC16TargetLowering(PIC16TargetMachine &TM); - /// LowerOperation - Provide custom lowering hooks for some operations. - virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG); - - SDValue LowerGlobalAddress(SDValue Op, SelectionDAG &DAG); - SDValue LowerFORMAL_ARGUMENTS(SDValue Op, SelectionDAG &DAG); - SDValue LowerRET(SDValue Op, SelectionDAG &DAG); - SDValue LowerFrameIndex(SDValue Op, SelectionDAG &DAG); - SDValue LowerBR_CC(SDValue Op, SelectionDAG &DAG); - - SDValue RemoveHiLo(SDNode *, SelectionDAG &DAG, - DAGCombinerInfo &DCI) const; - SDValue LowerADDSUB(SDNode *, SelectionDAG &DAG, - DAGCombinerInfo &DCI) const; - SDValue LowerLOAD(SDNode *, SelectionDAG &DAG, - DAGCombinerInfo &DCI) const; - - /// getTargetNodeName - This method returns the name of a target specific - // DAG node. + /// getTargetNodeName - This method returns the name of a target specific + /// DAG node. virtual const char *getTargetNodeName(unsigned Opcode) const; - virtual SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const; - - // utility function. - const SDValue *findLoadi8(const SDValue &Src, SelectionDAG &DAG) const; + SDValue LowerOperation(SDValue Op, SelectionDAG &DAG); + SDValue LowerFORMAL_ARGUMENTS(SDValue Op, SelectionDAG &DAG); + SDValue LowerADDE(SDValue Op, SelectionDAG &DAG); + SDValue LowerADDC(SDValue Op, SelectionDAG &DAG); + SDValue LowerSUBE(SDValue Op, SelectionDAG &DAG); + SDValue LowerSUBC(SDValue Op, SelectionDAG &DAG); + + SDNode *ReplaceNodeResults(SDNode *N, SelectionDAG &DAG); + SDNode *ExpandStore(SDNode *N, SelectionDAG &DAG); + SDNode *ExpandLoad(SDNode *N, SelectionDAG &DAG); + SDNode *ExpandAdd(SDNode *N, SelectionDAG &DAG); + SDNode *ExpandGlobalAddress(SDNode *N, SelectionDAG &DAG); + SDNode *ExpandShift(SDNode *N, SelectionDAG &DAG); + + SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const; + SDValue PerformPIC16LoadCombine(SDNode *N, DAGCombinerInfo &DCI) const; + + private: + // If the Node is a BUILD_PAIR representing representing an Address + // then this function will return true + bool isDirectAddress(const SDValue &Op); + + // If the Node is a DirectAddress in ROM_SPACE then this + // function will return true + bool isRomAddress(const SDValue &Op); + + // To extract chain value from the SDValue Nodes + // This function will help to maintain the chain extracting + // code at one place. In case of any change in future it will + // help maintain the code + SDValue getChain(SDValue &Op); + + + // Extract the Lo and Hi component of Op. + void GetExpandedParts(SDValue Op, SelectionDAG &DAG, SDValue &Lo, + SDValue &Hi); + + + // Load pointer can be a direct or indirect address. In PIC16 direct + // addresses need Banksel and Indirect addresses need to be loaded to + // FSR first. Handle address specific cases here. + void LegalizeAddress(SDValue Ptr, SelectionDAG &DAG, SDValue &Chain, + SDValue &NewPtr, unsigned &Offset); + + // We can not have both operands of a binary operation in W. + // This function is used to put one operand on stack and generate a load. + SDValue ConvertToMemOperand(SDValue Op, SelectionDAG &DAG); + + /// Subtarget - Keep a pointer to the PIC16Subtarget around so that we can + /// make the right decision when generating code for different targets. + const PIC16Subtarget *Subtarget; }; } // namespace llvm |