static void createFPFnStub(Function *F, Module *M, FPParamVariant PV,
const MipsTargetMachine &TM) {
bool PicMode = TM.getRelocationModel() == Reloc::PIC_;
bool LE = TM.isLittleEndian();
LLVMContext &Context = M->getContext();
std::string Name = F->getName();
std::string SectionName = ".mips16.fn." + Name;
std::string StubName = "__fn_stub_" + Name;
std::string LocalName = "$$__fn_local_" + Name;
Function *FStub = Function::Create
(F->getFunctionType(),
Function::InternalLinkage, StubName, M);
FStub->addFnAttr("mips16_fp_stub");
FStub->addFnAttr(llvm::Attribute::Naked);
FStub->addFnAttr(llvm::Attribute::NoUnwind);
FStub->addFnAttr(llvm::Attribute::NoInline);
FStub->addFnAttr("nomips16");
FStub->setSection(SectionName);
BasicBlock *BB = BasicBlock::Create(Context, "entry", FStub);
InlineAsmHelper IAH(Context, BB);
if (PicMode) {
IAH.Out(".set noreorder");
IAH.Out(".cpload $$25");
IAH.Out(".set reorder");
IAH.Out(".reloc 0,R_MIPS_NONE," + Name);
IAH.Out("la $$25," + LocalName);
}
else {
IAH.Out("la $$25," + Name);
}
swapFPIntParams(PV, M, IAH, LE, false);
IAH.Out("jr $$25");
IAH.Out(LocalName + " = " + Name);
new UnreachableInst(FStub->getContext(), BB);
}
static void createFPFnStub(Function *F, Module *M, FPParamVariant PV,
const MipsTargetMachine &TM) {
bool PicMode = TM.isPositionIndependent();
bool LE = TM.isLittleEndian();
LLVMContext &Context = M->getContext();
std::string Name = F->getName();
std::string SectionName = ".mips16.fn." + Name;
std::string StubName = "__fn_stub_" + Name;
std::string LocalName = "$$__fn_local_" + Name;
Function *FStub = Function::Create
(F->getFunctionType(),
Function::InternalLinkage, StubName, M);
FStub->addFnAttr("mips16_fp_stub");
FStub->addFnAttr(llvm::Attribute::Naked);
FStub->addFnAttr(llvm::Attribute::NoUnwind);
FStub->addFnAttr(llvm::Attribute::NoInline);
FStub->addFnAttr("nomips16");
FStub->setSection(SectionName);
BasicBlock *BB = BasicBlock::Create(Context, "entry", FStub);
std::string AsmText;
if (PicMode) {
AsmText += ".set noreorder\n";
AsmText += ".cpload $$25\n";
AsmText += ".set reorder\n";
AsmText += ".reloc 0, R_MIPS_NONE, " + Name + "\n";
AsmText += "la $$25, " + LocalName + "\n";
} else
AsmText += "la $$25, " + Name + "\n";
AsmText += swapFPIntParams(PV, M, LE, false);
AsmText += "jr $$25\n";
AsmText += LocalName + " = " + Name + "\n";
EmitInlineAsm(Context, BB, AsmText);
new UnreachableInst(FStub->getContext(), BB);
}
//
// Make sure that we know we already need a stub for this function.
// Having called needsFPHelperFromSig
//
static void assureFPCallStub(Function &F, Module *M,
const MipsTargetMachine &TM) {
// for now we only need them for static relocation
if (TM.isPositionIndependent())
return;
LLVMContext &Context = M->getContext();
bool LE = TM.isLittleEndian();
std::string Name = F.getName();
std::string SectionName = ".mips16.call.fp." + Name;
std::string StubName = "__call_stub_fp_" + Name;
//
// see if we already have the stub
//
Function *FStub = M->getFunction(StubName);
if (FStub && !FStub->isDeclaration()) return;
FStub = Function::Create(F.getFunctionType(),
Function::InternalLinkage, StubName, M);
FStub->addFnAttr("mips16_fp_stub");
FStub->addFnAttr(llvm::Attribute::Naked);
FStub->addFnAttr(llvm::Attribute::NoInline);
FStub->addFnAttr(llvm::Attribute::NoUnwind);
FStub->addFnAttr("nomips16");
FStub->setSection(SectionName);
BasicBlock *BB = BasicBlock::Create(Context, "entry", FStub);
FPReturnVariant RV = whichFPReturnVariant(FStub->getReturnType());
FPParamVariant PV = whichFPParamVariantNeeded(F);
std::string AsmText;
AsmText += ".set reorder\n";
AsmText += swapFPIntParams(PV, M, LE, true);
if (RV != NoFPRet) {
AsmText += "move $$18, $$31\n";
AsmText += "jal " + Name + "\n";
} else {
AsmText += "lui $$25, %hi(" + Name + ")\n";
AsmText += "addiu $$25, $$25, %lo(" + Name + ")\n";
}
switch (RV) {
case FRet:
AsmText += "mfc1 $$2, $$f0\n";
break;
case DRet:
if (LE) {
AsmText += "mfc1 $$2, $$f0\n";
AsmText += "mfc1 $$3, $$f1\n";
} else {
AsmText += "mfc1 $$3, $$f0\n";
AsmText += "mfc1 $$2, $$f1\n";
}
break;
case CFRet:
if (LE) {
AsmText += "mfc1 $$2, $$f0\n";
AsmText += "mfc1 $$3, $$f2\n";
} else {
AsmText += "mfc1 $$3, $$f0\n";
AsmText += "mfc1 $$3, $$f2\n";
}
break;
case CDRet:
if (LE) {
AsmText += "mfc1 $$4, $$f2\n";
AsmText += "mfc1 $$5, $$f3\n";
AsmText += "mfc1 $$2, $$f0\n";
AsmText += "mfc1 $$3, $$f1\n";
} else {
AsmText += "mfc1 $$5, $$f2\n";
AsmText += "mfc1 $$4, $$f3\n";
AsmText += "mfc1 $$3, $$f0\n";
AsmText += "mfc1 $$2, $$f1\n";
}
break;
case NoFPRet:
break;
}
if (RV != NoFPRet)
AsmText += "jr $$18\n";
else
AsmText += "jr $$25\n";
EmitInlineAsm(Context, BB, AsmText);
new UnreachableInst(Context, BB);
}