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diff --git a/lib/Target/MBlaze/AsmPrinter/MBlazeAsmPrinter.cpp b/lib/Target/MBlaze/AsmPrinter/MBlazeAsmPrinter.cpp
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+//===-- MBlazeAsmPrinter.cpp - MBlaze 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 GAS-format MBlaze assembly language.
+//
+//===----------------------------------------------------------------------===//
+
+#define DEBUG_TYPE "mblaze-asm-printer"
+
+#include "MBlaze.h"
+#include "MBlazeSubtarget.h"
+#include "MBlazeInstrInfo.h"
+#include "MBlazeTargetMachine.h"
+#include "MBlazeMachineFunction.h"
+#include "llvm/Constants.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/Module.h"
+#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/CodeGen/DwarfWriter.h"
+#include "llvm/CodeGen/MachineFunctionPass.h"
+#include "llvm/CodeGen/MachineConstantPool.h"
+#include "llvm/CodeGen/MachineFrameInfo.h"
+#include "llvm/CodeGen/MachineInstr.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCSymbol.h"
+#include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetLoweringObjectFile.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetOptions.h"
+#include "llvm/Target/TargetRegistry.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/ADT/Statistic.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/FormattedStream.h"
+#include "llvm/Support/MathExtras.h"
+#include <cctype>
+
+using namespace llvm;
+
+namespace {
+ class MBlazeAsmPrinter : public AsmPrinter {
+ const MBlazeSubtarget *Subtarget;
+ public:
+ explicit MBlazeAsmPrinter(formatted_raw_ostream &O, TargetMachine &TM,
+ MCContext &Ctx, MCStreamer &Streamer,
+ const MCAsmInfo *T )
+ : AsmPrinter(O, TM, Ctx, Streamer, T) {
+ Subtarget = &TM.getSubtarget<MBlazeSubtarget>();
+ }
+
+ virtual const char *getPassName() const {
+ return "MBlaze Assembly Printer";
+ }
+
+ bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
+ unsigned AsmVariant, const char *ExtraCode);
+ void printOperand(const MachineInstr *MI, int opNum);
+ void printUnsignedImm(const MachineInstr *MI, int opNum);
+ void printFSLImm(const MachineInstr *MI, int opNum);
+ void printMemOperand(const MachineInstr *MI, int opNum,
+ const char *Modifier = 0);
+ void printFCCOperand(const MachineInstr *MI, int opNum,
+ const char *Modifier = 0);
+ void printSavedRegsBitmask();
+ void printHex32(unsigned int Value);
+
+ const char *emitCurrentABIString();
+ void emitFrameDirective();
+
+ void printInstruction(const MachineInstr *MI); // autogenerated.
+ void EmitInstruction(const MachineInstr *MI) {
+ printInstruction(MI);
+ O << '\n';
+ }
+ virtual void EmitFunctionBodyStart();
+ virtual void EmitFunctionBodyEnd();
+ static const char *getRegisterName(unsigned RegNo);
+
+ virtual void EmitFunctionEntryLabel();
+ void EmitStartOfAsmFile(Module &M);
+ };
+} // end of anonymous namespace
+
+#include "MBlazeGenAsmWriter.inc"
+
+//===----------------------------------------------------------------------===//
+//
+// MBlaze Asm Directives
+//
+// -- Frame directive "frame Stackpointer, Stacksize, RARegister"
+// Describe the stack frame.
+//
+// -- Mask directives "mask bitmask, offset"
+// Tells the assembler which registers are saved and where.
+// bitmask - contain a little endian bitset indicating which registers are
+// saved on function prologue (e.g. with a 0x80000000 mask, the
+// assembler knows the register 31 (RA) is saved at prologue.
+// offset - the position before stack pointer subtraction indicating where
+// the first saved register on prologue is located. (e.g. with a
+//
+// Consider the following function prologue:
+//
+// .frame R19,48,R15
+// .mask 0xc0000000,-8
+// addiu R1, R1, -48
+// sw R15, 40(R1)
+// sw R19, 36(R1)
+//
+// With a 0xc0000000 mask, the assembler knows the register 15 (R15) and
+// 19 (R19) are saved at prologue. As the save order on prologue is from
+// left to right, R15 is saved first. A -8 offset means that after the
+// stack pointer subtration, the first register in the mask (R15) will be
+// saved at address 48-8=40.
+//
+//===----------------------------------------------------------------------===//
+
+//===----------------------------------------------------------------------===//
+// Mask directives
+//===----------------------------------------------------------------------===//
+
+// 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() {
+ 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 RegNum = MBlazeRegisterInfo::getRegisterNumbering(CSI[i].getReg());
+ if (CSI[i].getRegClass() == MBlaze::CPURegsRegisterClass)
+ CPUBitmask |= (1 << RegNum);
+ }
+
+ // Return Address and Frame registers must also be set in CPUBitmask.
+ if (RI.hasFP(*MF))
+ CPUBitmask |= (1 << MBlazeRegisterInfo::
+ getRegisterNumbering(RI.getFrameRegister(*MF)));
+
+ if (MFI->hasCalls())
+ CPUBitmask |= (1 << MBlazeRegisterInfo::
+ getRegisterNumbering(RI.getRARegister()));
+
+ // Print CPUBitmask
+ O << "\t.mask \t"; printHex32(CPUBitmask); O << ','
+ << MBlazeFI->getCPUTopSavedRegOff() << '\n';
+}
+
+// Print a 32 bit hex number with all numbers.
+void MBlazeAsmPrinter::printHex32(unsigned int Value) {
+ O << "0x";
+ for (int i = 7; i >= 0; i--)
+ O << utohexstr( (Value & (0xF << (i*4))) >> (i*4) );
+}
+
+//===----------------------------------------------------------------------===//
+// Frame and Set directives
+//===----------------------------------------------------------------------===//
+
+/// Frame Directive
+void MBlazeAsmPrinter::emitFrameDirective() {
+ const TargetRegisterInfo &RI = *TM.getRegisterInfo();
+
+ unsigned stackReg = RI.getFrameRegister(*MF);
+ unsigned returnReg = RI.getRARegister();
+ unsigned stackSize = MF->getFrameInfo()->getStackSize();
+
+
+ O << "\t.frame\t" << getRegisterName(stackReg)
+ << ',' << stackSize << ','
+ << getRegisterName(returnReg)
+ << '\n';
+}
+
+void MBlazeAsmPrinter::EmitFunctionEntryLabel() {
+ O << "\t.ent\t" << *CurrentFnSym << '\n';
+ OutStreamer.EmitLabel(CurrentFnSym);
+}
+
+/// EmitFunctionBodyStart - Targets can override this to emit stuff before
+/// the first basic block in the function.
+void MBlazeAsmPrinter::EmitFunctionBodyStart() {
+ emitFrameDirective();
+ printSavedRegsBitmask();
+}
+
+/// EmitFunctionBodyEnd - Targets can override this to emit stuff after
+/// the last basic block in the function.
+void MBlazeAsmPrinter::EmitFunctionBodyEnd() {
+ O << "\t.end\t" << *CurrentFnSym << '\n';
+}
+
+// Print out an operand for an inline asm expression.
+bool MBlazeAsmPrinter::
+PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
+ unsigned AsmVariant,const char *ExtraCode){
+ // Does this asm operand have a single letter operand modifier?
+ if (ExtraCode && ExtraCode[0])
+ return true; // Unknown modifier.
+
+ printOperand(MI, OpNo);
+ return false;
+}
+
+void MBlazeAsmPrinter::printOperand(const MachineInstr *MI, int opNum) {
+ const MachineOperand &MO = MI->getOperand(opNum);
+
+ switch (MO.getType()) {
+ case MachineOperand::MO_Register:
+ O << getRegisterName(MO.getReg());
+ break;
+
+ case MachineOperand::MO_Immediate:
+ O << (int)MO.getImm();
+ break;
+
+ case MachineOperand::MO_FPImmediate: {
+ const ConstantFP* fp = MO.getFPImm();
+ printHex32(fp->getValueAPF().bitcastToAPInt().getZExtValue());
+ O << ";\t# immediate = " << *fp;
+ break;
+ }
+
+ case MachineOperand::MO_MachineBasicBlock:
+ O << *MO.getMBB()->getSymbol(OutContext);
+ return;
+
+ case MachineOperand::MO_GlobalAddress:
+ O << *GetGlobalValueSymbol(MO.getGlobal());
+ break;
+
+ case MachineOperand::MO_ExternalSymbol:
+ O << *GetExternalSymbolSymbol(MO.getSymbolName());
+ break;
+
+ case MachineOperand::MO_JumpTableIndex:
+ O << MAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
+ << '_' << MO.getIndex();
+ break;
+
+ case MachineOperand::MO_ConstantPoolIndex:
+ O << MAI->getPrivateGlobalPrefix() << "CPI"
+ << getFunctionNumber() << "_" << MO.getIndex();
+ if (MO.getOffset())
+ O << "+" << MO.getOffset();
+ break;
+
+ default:
+ llvm_unreachable("<unknown operand type>");
+ }
+}
+
+void MBlazeAsmPrinter::printUnsignedImm(const MachineInstr *MI, int opNum) {
+ const MachineOperand &MO = MI->getOperand(opNum);
+ if (MO.getType() == MachineOperand::MO_Immediate)
+ O << (unsigned int)MO.getImm();
+ else
+ printOperand(MI, opNum);
+}
+
+void MBlazeAsmPrinter::printFSLImm(const MachineInstr *MI, int opNum) {
+ const MachineOperand &MO = MI->getOperand(opNum);
+ if (MO.getType() == MachineOperand::MO_Immediate)
+ O << "rfsl" << (unsigned int)MO.getImm();
+ else
+ printOperand(MI, opNum);
+}
+
+void MBlazeAsmPrinter::
+printMemOperand(const MachineInstr *MI, int opNum, const char *Modifier) {
+ printOperand(MI, opNum+1);
+ O << ", ";
+ printOperand(MI, opNum);
+}
+
+void MBlazeAsmPrinter::
+printFCCOperand(const MachineInstr *MI, int opNum, const char *Modifier) {
+ const MachineOperand& MO = MI->getOperand(opNum);
+ O << MBlaze::MBlazeFCCToString((MBlaze::CondCode)MO.getImm());
+}
+
+void MBlazeAsmPrinter::EmitStartOfAsmFile(Module &M) {
+}
+
+// Force static initialization.
+extern "C" void LLVMInitializeMBlazeAsmPrinter() {
+ RegisterAsmPrinter<MBlazeAsmPrinter> X(TheMBlazeTarget);
+}
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