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0e68771536
A brief description about PIC16: =============================== PIC16 is an 8-bit microcontroller with only one 8-bit register which is the accumulator. All arithmetic/load/store operations are 8-bit only. The architecture has two address spaces: program and data. The program memory is divided into 2K pages and the data memory is divided into banks of 128 byte, with only 80 usable bytes, resulting in an non-contiguous data memory. It supports direct data memory access (by specifying the address as part of the instruction) and indirect data and program memory access (in an unorthodox fashion which utilize a 16 bit pointer register). Two classes of registers exist: (8-bit class which is only one accumulator) (16-bit class, which contains one or more 16 bit pointer(s)) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51027 91177308-0d34-0410-b5e6-96231b3b80d8
89 lines
3.2 KiB
C++
89 lines
3.2 KiB
C++
//===- PIC16ConstantPoolValue.cpp - PIC16 constantpool value --------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the PIC16 specific constantpool value class.
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//
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//===----------------------------------------------------------------------===//
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#include "PIC16ConstantPoolValue.h"
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#include "llvm/ADT/FoldingSet.h"
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#include "llvm/GlobalValue.h"
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#include "llvm/Type.h"
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using namespace llvm;
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PIC16ConstantPoolValue::PIC16ConstantPoolValue(GlobalValue *gv, unsigned id,
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PIC16CP::PIC16CPKind k,
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unsigned char PCAdj,
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const char *Modif, bool AddCA)
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: MachineConstantPoolValue((const Type*)gv->getType()),
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GV(gv), S(NULL), LabelId(id), Kind(k), PCAdjust(PCAdj),
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Modifier(Modif), AddCurrentAddress(AddCA) {}
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PIC16ConstantPoolValue::PIC16ConstantPoolValue(const char *s, unsigned id,
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PIC16CP::PIC16CPKind k,
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unsigned char PCAdj,
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const char *Modif, bool AddCA)
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: MachineConstantPoolValue((const Type*)Type::Int32Ty),
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GV(NULL), S(s), LabelId(id), Kind(k), PCAdjust(PCAdj),
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Modifier(Modif), AddCurrentAddress(AddCA) {}
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PIC16ConstantPoolValue::PIC16ConstantPoolValue(GlobalValue *gv,
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PIC16CP::PIC16CPKind k,
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const char *Modif)
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: MachineConstantPoolValue((const Type*)Type::Int32Ty),
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GV(gv), S(NULL), LabelId(0), Kind(k), PCAdjust(0),
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Modifier(Modif) {}
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int PIC16ConstantPoolValue::getExistingMachineCPValue(MachineConstantPool *CP,
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unsigned Alignment) {
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unsigned AlignMask = (1 << Alignment)-1;
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const std::vector<MachineConstantPoolEntry> Constants = CP->getConstants();
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for (unsigned i = 0, e = Constants.size(); i != e; ++i) {
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if (Constants[i].isMachineConstantPoolEntry() &&
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(Constants[i].Offset & AlignMask) == 0) {
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PIC16ConstantPoolValue *CPV =
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(PIC16ConstantPoolValue *)Constants[i].Val.MachineCPVal;
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if (CPV->GV == GV &&
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CPV->S == S &&
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CPV->LabelId == LabelId &&
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CPV->Kind == Kind &&
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CPV->PCAdjust == PCAdjust)
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return i;
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}
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}
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return -1;
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}
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void
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PIC16ConstantPoolValue::AddSelectionDAGCSEId(FoldingSetNodeID &ID) {
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ID.AddPointer(GV);
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ID.AddPointer(S);
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ID.AddInteger(LabelId);
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ID.AddInteger((unsigned)Kind);
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ID.AddInteger(PCAdjust);
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}
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void PIC16ConstantPoolValue::print(std::ostream &O) const {
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if (GV)
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O << GV->getName();
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else
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O << S;
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if (isNonLazyPointer()) O << "$non_lazy_ptr";
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else if (isStub()) O << "$stub";
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if (Modifier) O << "(" << Modifier << ")";
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if (PCAdjust != 0) {
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O << "-(LPIC" << LabelId << "+"
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<< (unsigned)PCAdjust;
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if (AddCurrentAddress)
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O << "-.";
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O << ")";
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}
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}
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