mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-07 12:29:30 +00:00
b1b5ffd827
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
402 lines
13 KiB
C++
402 lines
13 KiB
C++
//===-- PIC16AsmPrinter.cpp - PIC16 LLVM assembly writer ------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file contains a printer that converts from our internal representation
|
|
// of machine-dependent LLVM code to PIC16 assembly language.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "PIC16AsmPrinter.h"
|
|
#include "PIC16TargetAsmInfo.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
#include "llvm/Support/Mangler.h"
|
|
#include "llvm/Function.h"
|
|
#include "llvm/Module.h"
|
|
#include "llvm/CodeGen/MachineFrameInfo.h"
|
|
#include "llvm/DerivedTypes.h"
|
|
|
|
using namespace llvm;
|
|
|
|
#include "PIC16GenAsmWriter.inc"
|
|
|
|
bool PIC16AsmPrinter::printMachineInstruction(const MachineInstr *MI) {
|
|
std::string NewBankselLabel;
|
|
unsigned Operands = MI->getNumOperands();
|
|
if (Operands > 1) {
|
|
// Global address or external symbol should be second operand from last
|
|
// if we want to print banksel for it.
|
|
const MachineOperand &Op = MI->getOperand(Operands-2);
|
|
unsigned OpType = Op.getType();
|
|
if (OpType == MachineOperand::MO_GlobalAddress ||
|
|
OpType == MachineOperand::MO_ExternalSymbol) {
|
|
if (OpType == MachineOperand::MO_GlobalAddress )
|
|
NewBankselLabel = Mang->getValueName(Op.getGlobal());
|
|
else
|
|
NewBankselLabel = Op.getSymbolName();
|
|
|
|
// Operand after global address or external symbol should be banksel.
|
|
// Value 1 for this operand means we need to generate banksel else do not
|
|
// generate banksel.
|
|
const MachineOperand &BS = MI->getOperand(Operands-1);
|
|
if (((int)BS.getImm() == 1) &&
|
|
(strcmp (CurrentBankselLabelInBasicBlock.c_str(),
|
|
NewBankselLabel.c_str()))) {
|
|
CurrentBankselLabelInBasicBlock = NewBankselLabel;
|
|
O << "\tbanksel ";
|
|
printOperand(MI, Operands-2);
|
|
O << "\n";
|
|
}
|
|
}
|
|
}
|
|
printInstruction(MI);
|
|
return true;
|
|
}
|
|
|
|
/// runOnMachineFunction - This uses the printInstruction()
|
|
/// method to print assembly for each instruction.
|
|
///
|
|
bool PIC16AsmPrinter::runOnMachineFunction(MachineFunction &MF) {
|
|
// This calls the base class function required to be called at beginning
|
|
// of runOnMachineFunction.
|
|
SetupMachineFunction(MF);
|
|
|
|
// Get the mangled name.
|
|
const Function *F = MF.getFunction();
|
|
CurrentFnName = Mang->getValueName(F);
|
|
|
|
// Emit the function variables.
|
|
emitFunctionData(MF);
|
|
std::string codeSection;
|
|
codeSection = "code." + CurrentFnName + ".#";
|
|
O << "\n";
|
|
SwitchToTextSection (codeSection.c_str(),F);
|
|
|
|
// Print out code for the function.
|
|
for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
|
|
I != E; ++I) {
|
|
// Print a label for the basic block.
|
|
if (I != MF.begin()) {
|
|
printBasicBlockLabel(I, true);
|
|
O << '\n';
|
|
}
|
|
else
|
|
O << "_" << CurrentFnName << ":\n";
|
|
CurrentBankselLabelInBasicBlock = "";
|
|
for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
|
|
II != E; ++II) {
|
|
// Print the assembly for the instruction.
|
|
printMachineInstruction(II);
|
|
}
|
|
}
|
|
return false; // we didn't modify anything.
|
|
}
|
|
|
|
/// createPIC16CodePrinterPass - Returns a pass that prints the PIC16
|
|
/// assembly code for a MachineFunction to the given output stream,
|
|
/// using the given target machine description. This should work
|
|
/// regardless of whether the function is in SSA form.
|
|
///
|
|
FunctionPass *llvm::createPIC16CodePrinterPass(raw_ostream &o,
|
|
PIC16TargetMachine &tm) {
|
|
return new PIC16AsmPrinter(o, tm, tm.getTargetAsmInfo());
|
|
}
|
|
|
|
void PIC16AsmPrinter::printOperand(const MachineInstr *MI, int opNum) {
|
|
const MachineOperand &MO = MI->getOperand(opNum);
|
|
|
|
switch (MO.getType()) {
|
|
case MachineOperand::MO_Register:
|
|
if (TargetRegisterInfo::isPhysicalRegister(MO.getReg()))
|
|
O << TM.getRegisterInfo()->get(MO.getReg()).AsmName;
|
|
else
|
|
assert(0 && "not implemented");
|
|
return;
|
|
|
|
case MachineOperand::MO_Immediate:
|
|
O << (int)MO.getImm();
|
|
return;
|
|
|
|
case MachineOperand::MO_GlobalAddress:
|
|
O << Mang->getValueName(MO.getGlobal());
|
|
break;
|
|
|
|
case MachineOperand::MO_ExternalSymbol:
|
|
O << MO.getSymbolName();
|
|
break;
|
|
|
|
default:
|
|
assert(0 && " Operand type not supported.");
|
|
}
|
|
}
|
|
|
|
bool PIC16AsmPrinter::doInitialization (Module &M) {
|
|
bool Result = AsmPrinter::doInitialization(M);
|
|
// FIXME:: This is temporary solution to generate the include file.
|
|
// The processor should be passed to llc as in input and the header file
|
|
// should be generated accordingly.
|
|
O << "\t#include P16F1937.INC\n";
|
|
|
|
EmitInitData (M);
|
|
EmitUnInitData(M);
|
|
EmitRomData(M);
|
|
return Result;
|
|
}
|
|
|
|
void PIC16AsmPrinter::EmitInitData (Module &M)
|
|
{
|
|
std::string iDataSection = "idata.#";
|
|
SwitchToDataSection(iDataSection.c_str());
|
|
for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
|
|
I != E; ++I) {
|
|
if (!I->hasInitializer()) // External global require no code.
|
|
continue;
|
|
|
|
Constant *C = I->getInitializer();
|
|
const PointerType *PtrTy = I->getType();
|
|
int AddrSpace = PtrTy->getAddressSpace();
|
|
|
|
if ((!C->isNullValue()) && (AddrSpace == PIC16ISD::RAM_SPACE)) {
|
|
|
|
if (EmitSpecialLLVMGlobal(I))
|
|
continue;
|
|
|
|
// Any variables reaching here with "." in its name is a local scope
|
|
// variable and should not be printed in global data section.
|
|
std::string name = Mang->getValueName(I);
|
|
if (name.find(".") != std::string::npos)
|
|
continue;
|
|
|
|
O << name;
|
|
EmitGlobalConstant(C);
|
|
}
|
|
}
|
|
}
|
|
|
|
void PIC16AsmPrinter::EmitConstantValueOnly(const Constant* CV) {
|
|
if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
|
|
unsigned BitWidth = CI->getBitWidth();
|
|
int Val = CI->getZExtValue();
|
|
if (BitWidth == 8) {
|
|
// Expecting db directive here. In case of romdata we need to pad the
|
|
// word with zeros.
|
|
if (IsRomData)
|
|
O << 0 <<", ";
|
|
O << Val;
|
|
}
|
|
else if (BitWidth == 16) {
|
|
unsigned Element1, Element2;
|
|
Element1 = 0x00ff & Val;
|
|
Element2 = 0x00ff & (Val >> 8);
|
|
if (IsRomData)
|
|
O << 0 <<", "<<Element1 <<", "<< 0 <<", "<< Element2;
|
|
else
|
|
O << Element1 <<", "<< Element2;
|
|
}
|
|
else if (BitWidth == 32) {
|
|
unsigned Element1, Element2, Element3, Element4;
|
|
Element1 = 0x00ff & Val;
|
|
Element2 = 0x00ff & (Val >> 8);
|
|
Element3 = 0x00ff & (Val >> 16);
|
|
Element4 = 0x00ff & (Val >> 24);
|
|
if (IsRomData)
|
|
O << 0 <<", "<< Element1 <<", "<< 0 <<", "<< Element2 <<", "<< 0
|
|
<<", "<< Element3 <<", "<< 0 <<", "<< Element4;
|
|
else
|
|
O << Element1 <<", "<< Element2 <<", "<< Element3 <<", "<< Element4;
|
|
}
|
|
return;
|
|
}
|
|
AsmPrinter::EmitConstantValueOnly(CV);
|
|
}
|
|
|
|
void PIC16AsmPrinter::EmitRomData (Module &M)
|
|
{
|
|
std::string romDataSection = "romdata.#";
|
|
SwitchToRomDataSection(romDataSection.c_str());
|
|
IsRomData = true;
|
|
for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
|
|
I != E; ++I) {
|
|
if (!I->hasInitializer()) // External global require no code.
|
|
continue;
|
|
|
|
Constant *C = I->getInitializer();
|
|
const PointerType *PtrTy = I->getType();
|
|
int AddrSpace = PtrTy->getAddressSpace();
|
|
if ((!C->isNullValue()) && (AddrSpace == PIC16ISD::ROM_SPACE)) {
|
|
|
|
if (EmitSpecialLLVMGlobal(I))
|
|
continue;
|
|
|
|
// Any variables reaching here with "." in its name is a local scope
|
|
// variable and should not be printed in global data section.
|
|
std::string name = Mang->getValueName(I);
|
|
if (name.find(".") != std::string::npos)
|
|
continue;
|
|
|
|
O << name;
|
|
EmitGlobalConstant(C);
|
|
O << "\n";
|
|
}
|
|
}
|
|
IsRomData = false;
|
|
}
|
|
|
|
|
|
void PIC16AsmPrinter::EmitUnInitData (Module &M)
|
|
{
|
|
std::string uDataSection = "udata.#";
|
|
SwitchToUDataSection(uDataSection.c_str());
|
|
const TargetData *TD = TM.getTargetData();
|
|
|
|
for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
|
|
I != E; ++I) {
|
|
if (!I->hasInitializer()) // External global require no code.
|
|
continue;
|
|
|
|
Constant *C = I->getInitializer();
|
|
if (C->isNullValue()) {
|
|
|
|
if (EmitSpecialLLVMGlobal(I))
|
|
continue;
|
|
|
|
// Any variables reaching here with "." in its name is a local scope
|
|
// variable and should not be printed in global data section.
|
|
std::string name = Mang->getValueName(I);
|
|
if (name.find(".") != std::string::npos)
|
|
continue;
|
|
|
|
const Type *Ty = C->getType();
|
|
unsigned Size = TD->getABITypeSize(Ty);
|
|
O << name << " " <<"RES"<< " " << Size ;
|
|
O << "\n";
|
|
}
|
|
}
|
|
}
|
|
|
|
bool PIC16AsmPrinter::doFinalization(Module &M) {
|
|
O << "\t" << "END\n";
|
|
bool Result = AsmPrinter::doFinalization(M);
|
|
return Result;
|
|
}
|
|
|
|
void PIC16AsmPrinter::emitFunctionData(MachineFunction &MF) {
|
|
const Function *F = MF.getFunction();
|
|
std::string FuncName = Mang->getValueName(F);
|
|
const Module *M = F->getParent();
|
|
const TargetData *TD = TM.getTargetData();
|
|
|
|
// Emit the data section name.
|
|
O << "\n";
|
|
std::string fDataSection = "fdata." + CurrentFnName + ".#";
|
|
SwitchToUDataSection(fDataSection.c_str(), F);
|
|
// Emit the label for data section of current function.
|
|
O << "_frame_" << CurrentFnName << ":" ;
|
|
O << "\n";
|
|
|
|
// Emit the function variables.
|
|
|
|
if (F->hasExternalLinkage()) {
|
|
O << "\t" << "GLOBAL _frame_" << CurrentFnName << "\n";
|
|
O << "\t" << "GLOBAL _" << CurrentFnName << "\n";
|
|
}
|
|
// In PIC16 all the function arguments and local variables are global.
|
|
// Therefore to get the variable belonging to this function entire
|
|
// global list will be traversed and variables belonging to this function
|
|
// will be emitted in the current data section.
|
|
for (Module::const_global_iterator I = M->global_begin(), E = M->global_end();
|
|
I != E; ++I) {
|
|
std::string VarName = Mang->getValueName(I);
|
|
|
|
// The variables of a function are of form FuncName.* . If this variable
|
|
// does not belong to this function then continue.
|
|
if (!(VarName.find(FuncName + ".") == 0 ? true : false))
|
|
continue;
|
|
|
|
Constant *C = I->getInitializer();
|
|
const Type *Ty = C->getType();
|
|
unsigned Size = TD->getABITypeSize(Ty);
|
|
// Emit memory reserve directive.
|
|
O << VarName << " RES " << Size << "\n";
|
|
}
|
|
emitFunctionTempData(MF);
|
|
}
|
|
|
|
void PIC16AsmPrinter::emitFunctionTempData(MachineFunction &MF) {
|
|
// Emit temporary variables.
|
|
MachineFrameInfo *FrameInfo = MF.getFrameInfo();
|
|
if (FrameInfo->hasStackObjects()) {
|
|
int indexBegin = FrameInfo->getObjectIndexBegin();
|
|
int indexEnd = FrameInfo->getObjectIndexEnd();
|
|
|
|
if (indexBegin < indexEnd)
|
|
O << CurrentFnName << ".tmp RES"<< " "
|
|
<<indexEnd - indexBegin <<"\n";
|
|
/*
|
|
while (indexBegin < indexEnd) {
|
|
O << CurrentFnName << "_tmp_" << indexBegin << " " << "RES"<< " "
|
|
<< 1 << "\n" ;
|
|
indexBegin++;
|
|
}
|
|
*/
|
|
}
|
|
}
|
|
|
|
/// The function is same as AsmPrinter::SwitchtoDataSection except the call
|
|
/// to getUDataSectionStartSuffix.
|
|
void PIC16AsmPrinter::SwitchToUDataSection(const char *NewSection,
|
|
const GlobalValue *GV) {
|
|
std::string NS;
|
|
if (GV && GV->hasSection())
|
|
NS = TAI->getSwitchToSectionDirective() + GV->getSection();
|
|
else
|
|
NS = NewSection;
|
|
|
|
// If we're already in this section, we're done.
|
|
if (CurrentSection == NS) return;
|
|
|
|
// Close the current section, if applicable.
|
|
if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
|
|
O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
|
|
|
|
CurrentSection = NS;
|
|
|
|
if (!CurrentSection.empty()){}
|
|
O << CurrentSection << (static_cast<const PIC16TargetAsmInfo *>(TAI))->
|
|
getUDataSectionStartSuffix() << '\n';
|
|
|
|
IsInTextSection = false;
|
|
}
|
|
|
|
/// The function is same as AsmPrinter::SwitchtoDataSection except the call
|
|
/// to getRomDataSectionStartSuffix.
|
|
void PIC16AsmPrinter::SwitchToRomDataSection(const char *NewSection,
|
|
const GlobalValue *GV) {
|
|
std::string NS;
|
|
if (GV && GV->hasSection())
|
|
NS = TAI->getSwitchToSectionDirective() + GV->getSection();
|
|
else
|
|
NS = NewSection;
|
|
|
|
// If we're already in this section, we're done.
|
|
if (CurrentSection == NS) return;
|
|
|
|
// Close the current section, if applicable.
|
|
if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
|
|
O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
|
|
|
|
CurrentSection = NS;
|
|
|
|
if (!CurrentSection.empty()) {}
|
|
O << CurrentSection << (static_cast< const PIC16TargetAsmInfo *>(TAI))->
|
|
getRomDataSectionStartSuffix() << '\n';
|
|
|
|
IsInTextSection = false;
|
|
}
|
|
|