+// Print a 32 bit hex number with all numbers.
+static void printHex32(unsigned int Value, raw_ostream &O) {
+ O << "0x";
+ for (int i = 7; i >= 0; i--)
+ O << utohexstr((Value & (0xF << (i*4))) >> (i*4));
+}
+
+// Create a bitmask with all callee saved registers for CPU or Floating Point
+// registers. For CPU registers consider RA, GP and FP for saving if necessary.
+void MBlazeAsmPrinter::printSavedRegsBitmask(raw_ostream &O) {
+ const TargetFrameInfo *TFI = TM.getFrameInfo();
+ const TargetRegisterInfo &RI = *TM.getRegisterInfo();
+ const MBlazeFunctionInfo *MBlazeFI = MF->getInfo<MBlazeFunctionInfo>();
+
+ // CPU Saved Registers Bitmasks
+ unsigned int CPUBitmask = 0;
+
+ // Set the CPU Bitmasks
+ const MachineFrameInfo *MFI = MF->getFrameInfo();
+ const std::vector<CalleeSavedInfo> &CSI = MFI->getCalleeSavedInfo();
+ for (unsigned i = 0, e = CSI.size(); i != e; ++i) {
+ unsigned Reg = CSI[i].getReg();
+ unsigned RegNum = MBlazeRegisterInfo::getRegisterNumbering(Reg);
+ if (MBlaze::GPRRegisterClass->contains(Reg))
+ CPUBitmask |= (1 << RegNum);
+ }
+
+ // Return Address and Frame registers must also be set in CPUBitmask.
+ if (TFI->hasFP(*MF))
+ CPUBitmask |= (1 << MBlazeRegisterInfo::
+ getRegisterNumbering(RI.getFrameRegister(*MF)));
+
+ if (MFI->adjustsStack())
+ CPUBitmask |= (1 << MBlazeRegisterInfo::
+ getRegisterNumbering(RI.getRARegister()));
+
+ // Print CPUBitmask
+ O << "\t.mask \t"; printHex32(CPUBitmask, O); O << ','
+ << MBlazeFI->getCPUTopSavedRegOff() << '\n';
+}
+
+/// Frame Directive
+void MBlazeAsmPrinter::emitFrameDirective() {
+ const TargetRegisterInfo &RI = *TM.getRegisterInfo();
+
+ unsigned stkReg = RI.getFrameRegister(*MF);
+ unsigned retReg = RI.getRARegister();
+ unsigned stkSze = MF->getFrameInfo()->getStackSize();
+
+ OutStreamer.EmitRawText("\t.frame\t" +
+ Twine(MBlazeInstPrinter::getRegisterName(stkReg)) +
+ "," + Twine(stkSze) + "," +
+ Twine(MBlazeInstPrinter::getRegisterName(retReg)));
+}
+
+void MBlazeAsmPrinter::EmitFunctionEntryLabel() {
+ OutStreamer.EmitRawText("\t.ent\t" + Twine(CurrentFnSym->getName()));
+ AsmPrinter::EmitFunctionEntryLabel();
+}
+
+void MBlazeAsmPrinter::EmitFunctionBodyStart() {
+ emitFrameDirective();
+
+ SmallString<128> Str;
+ raw_svector_ostream OS(Str);
+ printSavedRegsBitmask(OS);
+ OutStreamer.EmitRawText(OS.str());
+}
+
+void MBlazeAsmPrinter::EmitFunctionBodyEnd() {
+ OutStreamer.EmitRawText("\t.end\t" + Twine(CurrentFnSym->getName()));
+}
+