Recommit 116986 with capitalization typo fixed.
llvm-svn: 116993
diff --git a/llvm/lib/Target/MBlaze/MBlazeAsmPrinter.cpp b/llvm/lib/Target/MBlaze/MBlazeAsmPrinter.cpp
new file mode 100644
index 0000000..c1ae450
--- /dev/null
+++ b/llvm/lib/Target/MBlaze/MBlazeAsmPrinter.cpp
@@ -0,0 +1,314 @@
+//===-- 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 "MBlazeMCInstLower.h"
+#include "InstPrinter/MBlazeInstPrinter.h"
+#include "llvm/Constants.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/Module.h"
+#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/CodeGen/MachineFunctionPass.h"
+#include "llvm/CodeGen/MachineConstantPool.h"
+#include "llvm/CodeGen/MachineFrameInfo.h"
+#include "llvm/CodeGen/MachineInstr.h"
+#include "llvm/MC/MCInst.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCSymbol.h"
+#include "llvm/Target/Mangler.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/ADT/SmallString.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/raw_ostream.h"
+#include <cctype>
+
+using namespace llvm;
+
+namespace {
+ class MBlazeAsmPrinter : public AsmPrinter {
+ const MBlazeSubtarget *Subtarget;
+ public:
+ explicit MBlazeAsmPrinter(TargetMachine &TM, MCStreamer &Streamer)
+ : AsmPrinter(TM, Streamer) {
+ 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,
+ raw_ostream &O);
+ void printOperand(const MachineInstr *MI, int opNum, raw_ostream &O);
+ void printUnsignedImm(const MachineInstr *MI, int opNum, raw_ostream &O);
+ void printFSLImm(const MachineInstr *MI, int opNum, raw_ostream &O);
+ void printMemOperand(const MachineInstr *MI, int opNum, raw_ostream &O,
+ const char *Modifier = 0);
+ void printSavedRegsBitmask(raw_ostream &OS);
+
+ void emitFrameDirective();
+
+ void EmitInstruction(const MachineInstr *MI);
+ virtual void EmitFunctionBodyStart();
+ virtual void EmitFunctionBodyEnd();
+
+ virtual void EmitFunctionEntryLabel();
+ };
+} // 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.
+//
+//===----------------------------------------------------------------------===//
+
+//===----------------------------------------------------------------------===//
+void MBlazeAsmPrinter::EmitInstruction(const MachineInstr *MI) {
+ MBlazeMCInstLower MCInstLowering(OutContext, *Mang, *this);
+
+ MCInst TmpInst;
+ MCInstLowering.Lower(MI, TmpInst);
+ OutStreamer.EmitInstruction(TmpInst);
+}
+
+//===----------------------------------------------------------------------===//
+// Mask directives
+//===----------------------------------------------------------------------===//
+
+// 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 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::CPURegsRegisterClass->contains(Reg))
+ 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->adjustsStack())
+ CPUBitmask |= (1 << MBlazeRegisterInfo::
+ getRegisterNumbering(RI.getRARegister()));
+
+ // Print CPUBitmask
+ O << "\t.mask \t"; printHex32(CPUBitmask, O);
+ O << ',' << MBlazeFI->getCPUTopSavedRegOff() << '\n';
+}
+
+//===----------------------------------------------------------------------===//
+// 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();
+
+
+ /*
+ OutStreamer.EmitRawText("\t.frame\t" +
+ Twine(MBlazeInstPrinter::getRegisterName(stackReg)) +
+ "," + Twine(stackSize) + "," +
+ Twine(MBlazeInstPrinter::getRegisterName(returnReg)));
+ */
+}
+
+void MBlazeAsmPrinter::EmitFunctionEntryLabel() {
+ // OutStreamer.EmitRawText("\t.ent\t" + Twine(CurrentFnSym->getName()));
+ OutStreamer.EmitLabel(CurrentFnSym);
+}
+
+/// EmitFunctionBodyStart - Targets can override this to emit stuff before
+/// the first basic block in the function.
+void MBlazeAsmPrinter::EmitFunctionBodyStart() {
+ // emitFrameDirective();
+
+ // SmallString<128> Str;
+ // raw_svector_ostream OS(Str);
+ // printSavedRegsBitmask(OS);
+ // OutStreamer.EmitRawText(OS.str());
+}
+
+/// EmitFunctionBodyEnd - Targets can override this to emit stuff after
+/// the last basic block in the function.
+void MBlazeAsmPrinter::EmitFunctionBodyEnd() {
+ // OutStreamer.EmitRawText("\t.end\t" + Twine(CurrentFnSym->getName()));
+}
+
+// Print out an operand for an inline asm expression.
+bool MBlazeAsmPrinter::
+PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
+ unsigned AsmVariant,const char *ExtraCode, raw_ostream &O) {
+ // Does this asm operand have a single letter operand modifier?
+ if (ExtraCode && ExtraCode[0])
+ return true; // Unknown modifier.
+
+ printOperand(MI, OpNo, O);
+ return false;
+}
+
+void MBlazeAsmPrinter::printOperand(const MachineInstr *MI, int opNum,
+ raw_ostream &O) {
+ const MachineOperand &MO = MI->getOperand(opNum);
+
+ switch (MO.getType()) {
+ case MachineOperand::MO_Register:
+ O << MBlazeInstPrinter::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);
+ O << ";\t# immediate = " << *fp;
+ break;
+ }
+
+ case MachineOperand::MO_MachineBasicBlock:
+ O << *MO.getMBB()->getSymbol();
+ return;
+
+ case MachineOperand::MO_GlobalAddress:
+ O << *Mang->getSymbol(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,
+ raw_ostream &O) {
+ const MachineOperand &MO = MI->getOperand(opNum);
+ if (MO.isImm())
+ O << (unsigned int)MO.getImm();
+ else
+ printOperand(MI, opNum, O);
+}
+
+void MBlazeAsmPrinter::printFSLImm(const MachineInstr *MI, int opNum,
+ raw_ostream &O) {
+ const MachineOperand &MO = MI->getOperand(opNum);
+ if (MO.isImm())
+ O << "rfsl" << (unsigned int)MO.getImm();
+ else
+ printOperand(MI, opNum, O);
+}
+
+void MBlazeAsmPrinter::
+printMemOperand(const MachineInstr *MI, int opNum, raw_ostream &O,
+ const char *Modifier) {
+ printOperand(MI, opNum+1, O);
+ O << ", ";
+ printOperand(MI, opNum, O);
+}
+
+static MCInstPrinter *createMBlazeMCInstPrinter(const Target &T,
+ unsigned SyntaxVariant,
+ const MCAsmInfo &MAI) {
+ if (SyntaxVariant == 0)
+ return new MBlazeInstPrinter(MAI);
+ return 0;
+}
+
+// Force static initialization.
+extern "C" void LLVMInitializeMBlazeAsmPrinter() {
+ RegisterAsmPrinter<MBlazeAsmPrinter> X(TheMBlazeTarget);
+ TargetRegistry::RegisterMCInstPrinter(TheMBlazeTarget,
+ createMBlazeMCInstPrinter);
+
+}