-//== Mips/MipsCodeEmitter.cpp - Convert Mips Code to Machine Code -*- C++ -*-=//
+//===-- Mips/MipsCodeEmitter.cpp - Convert Mips Code to Machine Code ------===//
//
// The LLVM Compiler Infrastructure
//
#define DEBUG_TYPE "jit"
#include "Mips.h"
+#include "MCTargetDesc/MipsBaseInfo.h"
#include "MipsInstrInfo.h"
#include "MipsRelocations.h"
#include "MipsSubtarget.h"
#include "MipsTargetMachine.h"
-#include "MCTargetDesc/MipsBaseInfo.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/CodeGen/JITCodeEmitter.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineJumpTableInfo.h"
+#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineOperand.h"
#include "llvm/CodeGen/Passes.h"
-#include "llvm/Constants.h"
-#include "llvm/DerivedTypes.h"
-#include "llvm/Function.h"
+#include "llvm/IR/Constants.h"
+#include "llvm/IR/DerivedTypes.h"
#include "llvm/PassManager.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
class MipsCodeEmitter : public MachineFunctionPass {
MipsJITInfo *JTI;
const MipsInstrInfo *II;
- const TargetData *TD;
+ const DataLayout *TD;
const MipsSubtarget *Subtarget;
TargetMachine &TM;
JITCodeEmitter &MCE;
static char ID;
- public:
- MipsCodeEmitter(TargetMachine &tm, JITCodeEmitter &mce) :
- MachineFunctionPass(ID), JTI(0),
- II((const MipsInstrInfo *) tm.getInstrInfo()),
- TD(tm.getTargetData()), TM(tm), MCE(mce), MCPEs(0), MJTEs(0),
- IsPIC(TM.getRelocationModel() == Reloc::PIC_) {
- }
+public:
+ MipsCodeEmitter(TargetMachine &tm, JITCodeEmitter &mce)
+ : MachineFunctionPass(ID), JTI(0), II(0), TD(0),
+ TM(tm), MCE(mce), MCPEs(0), MJTEs(0),
+ IsPIC(TM.getRelocationModel() == Reloc::PIC_) {}
- bool runOnMachineFunction(MachineFunction &MF);
+ bool runOnMachineFunction(MachineFunction &MF);
- virtual const char *getPassName() const {
- return "Mips Machine Code Emitter";
- }
+ virtual const char *getPassName() const {
+ return "Mips Machine Code Emitter";
+ }
- /// getBinaryCodeForInstr - This function, generated by the
- /// CodeEmitterGenerator using TableGen, produces the binary encoding for
- /// machine instructions.
- uint64_t getBinaryCodeForInstr(const MachineInstr &MI) const;
+ /// getBinaryCodeForInstr - This function, generated by the
+ /// CodeEmitterGenerator using TableGen, produces the binary encoding for
+ /// machine instructions.
+ uint64_t getBinaryCodeForInstr(const MachineInstr &MI) const;
- void emitInstruction(const MachineInstr &MI);
+ void emitInstruction(MachineBasicBlock::instr_iterator MI,
+ MachineBasicBlock &MBB);
- private:
+private:
- void emitWordLE(unsigned Word);
+ void emitWord(unsigned Word);
- /// Routines that handle operands which add machine relocations which are
- /// fixed up by the relocation stage.
- void emitGlobalAddress(const GlobalValue *GV, unsigned Reloc,
- bool MayNeedFarStub) const;
- void emitExternalSymbolAddress(const char *ES, unsigned Reloc) const;
- void emitConstPoolAddress(unsigned CPI, unsigned Reloc) const;
- void emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) const;
- void emitMachineBasicBlock(MachineBasicBlock *BB, unsigned Reloc) const;
+ /// Routines that handle operands which add machine relocations which are
+ /// fixed up by the relocation stage.
+ void emitGlobalAddress(const GlobalValue *GV, unsigned Reloc,
+ bool MayNeedFarStub) const;
+ void emitExternalSymbolAddress(const char *ES, unsigned Reloc) const;
+ void emitConstPoolAddress(unsigned CPI, unsigned Reloc) const;
+ void emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) const;
+ void emitMachineBasicBlock(MachineBasicBlock *BB, unsigned Reloc) const;
- /// getMachineOpValue - Return binary encoding of operand. If the machine
- /// operand requires relocation, record the relocation and return zero.
- unsigned getMachineOpValue(const MachineInstr &MI,
- const MachineOperand &MO) const;
+ /// getMachineOpValue - Return binary encoding of operand. If the machine
+ /// operand requires relocation, record the relocation and return zero.
+ unsigned getMachineOpValue(const MachineInstr &MI,
+ const MachineOperand &MO) const;
- unsigned getRelocation(const MachineInstr &MI,
- const MachineOperand &MO) const;
+ unsigned getRelocation(const MachineInstr &MI,
+ const MachineOperand &MO) const;
- unsigned getJumpTargetOpValue(const MachineInstr &MI, unsigned OpNo) const;
+ unsigned getJumpTargetOpValue(const MachineInstr &MI, unsigned OpNo) const;
- unsigned getBranchTargetOpValue(const MachineInstr &MI,
- unsigned OpNo) const;
- unsigned getMemEncoding(const MachineInstr &MI, unsigned OpNo) const;
- unsigned getSizeExtEncoding(const MachineInstr &MI, unsigned OpNo) const;
- unsigned getSizeInsEncoding(const MachineInstr &MI, unsigned OpNo) const;
+ unsigned getBranchTargetOpValue(const MachineInstr &MI, unsigned OpNo) const;
+ unsigned getMemEncoding(const MachineInstr &MI, unsigned OpNo) const;
+ unsigned getMemEncodingMMImm12(const MachineInstr &MI, unsigned OpNo) const;
+ unsigned getSizeExtEncoding(const MachineInstr &MI, unsigned OpNo) const;
+ unsigned getSizeInsEncoding(const MachineInstr &MI, unsigned OpNo) const;
- int emitULW(const MachineInstr &MI);
- int emitUSW(const MachineInstr &MI);
- int emitULH(const MachineInstr &MI);
- int emitULHu(const MachineInstr &MI);
- int emitUSH(const MachineInstr &MI);
+ void emitGlobalAddressUnaligned(const GlobalValue *GV, unsigned Reloc,
+ int Offset) const;
- void emitGlobalAddressUnaligned(const GlobalValue *GV, unsigned Reloc,
- int Offset) const;
- };
+ /// Expand pseudo instructions with accumulator register operands.
+ void expandACCInstr(MachineBasicBlock::instr_iterator MI,
+ MachineBasicBlock &MBB, unsigned Opc) const;
+
+ /// \brief Expand pseudo instruction. Return true if MI was expanded.
+ bool expandPseudos(MachineBasicBlock::instr_iterator &MI,
+ MachineBasicBlock &MBB) const;
+};
}
char MipsCodeEmitter::ID = 0;
bool MipsCodeEmitter::runOnMachineFunction(MachineFunction &MF) {
- JTI = ((MipsTargetMachine&) MF.getTarget()).getJITInfo();
- II = ((const MipsTargetMachine&) MF.getTarget()).getInstrInfo();
- TD = ((const MipsTargetMachine&) MF.getTarget()).getTargetData();
+ MipsTargetMachine &Target = static_cast<MipsTargetMachine &>(
+ const_cast<TargetMachine &>(MF.getTarget()));
+
+ JTI = Target.getJITInfo();
+ II = Target.getInstrInfo();
+ TD = Target.getDataLayout();
Subtarget = &TM.getSubtarget<MipsSubtarget> ();
MCPEs = &MF.getConstantPool()->getConstants();
MJTEs = 0;
if (MF.getJumpTableInfo()) MJTEs = &MF.getJumpTableInfo()->getJumpTables();
- JTI->Initialize(MF, IsPIC);
+ JTI->Initialize(MF, IsPIC, Subtarget->isLittle());
MCE.setModuleInfo(&getAnalysis<MachineModuleInfo> ());
do {
DEBUG(errs() << "JITTing function '"
- << MF.getFunction()->getName() << "'\n");
+ << MF.getName() << "'\n");
MCE.startFunction(MF);
for (MachineFunction::iterator MBB = MF.begin(), E = MF.end();
MBB != E; ++MBB){
MCE.StartMachineBasicBlock(MBB);
- for (MachineBasicBlock::iterator I = MBB->begin(), E = MBB->end();
- I != E; ++I)
- emitInstruction(*I);
+ for (MachineBasicBlock::instr_iterator I = MBB->instr_begin(),
+ E = MBB->instr_end(); I != E;)
+ emitInstruction(*I++, *MBB);
}
} while (MCE.finishFunction(MF));
return (getMachineOpValue(MI, MI.getOperand(OpNo+1)) & 0xFFFF) | RegBits;
}
+unsigned MipsCodeEmitter::getMemEncodingMMImm12(const MachineInstr &MI,
+ unsigned OpNo) const {
+ llvm_unreachable("Unimplemented function.");
+ return 0;
+}
+
unsigned MipsCodeEmitter::getSizeExtEncoding(const MachineInstr &MI,
unsigned OpNo) const {
// size is encoded as size-1.
unsigned MipsCodeEmitter::getMachineOpValue(const MachineInstr &MI,
const MachineOperand &MO) const {
if (MO.isReg())
- return getMipsRegisterNumbering(MO.getReg());
+ return TM.getRegisterInfo()->getEncodingValue(MO.getReg());
else if (MO.isImm())
return static_cast<unsigned>(MO.getImm());
- else if (MO.isGlobal()) {
- if (MI.getOpcode() == Mips::ULW || MI.getOpcode() == Mips::USW ||
- MI.getOpcode() == Mips::ULH || MI.getOpcode() == Mips::ULHu)
- emitGlobalAddressUnaligned(MO.getGlobal(), getRelocation(MI, MO), 4);
- else if (MI.getOpcode() == Mips::USH)
- emitGlobalAddressUnaligned(MO.getGlobal(), getRelocation(MI, MO), 8);
- else
- emitGlobalAddress(MO.getGlobal(), getRelocation(MI, MO), true);
- } else if (MO.isSymbol())
+ else if (MO.isGlobal())
+ emitGlobalAddress(MO.getGlobal(), getRelocation(MI, MO), true);
+ else if (MO.isSymbol())
emitExternalSymbolAddress(MO.getSymbolName(), getRelocation(MI, MO));
else if (MO.isCPI())
emitConstPoolAddress(MO.getIndex(), getRelocation(MI, MO));
void MipsCodeEmitter::
emitExternalSymbolAddress(const char *ES, unsigned Reloc) const {
MCE.addRelocation(MachineRelocation::getExtSym(MCE.getCurrentPCOffset(),
- Reloc, ES, 0, 0, false));
+ Reloc, ES, 0, 0));
}
void MipsCodeEmitter::emitConstPoolAddress(unsigned CPI, unsigned Reloc) const {
Reloc, BB));
}
-int MipsCodeEmitter::emitUSW(const MachineInstr &MI) {
- unsigned src = getMachineOpValue(MI, MI.getOperand(0));
- unsigned base = getMachineOpValue(MI, MI.getOperand(1));
- unsigned offset = getMachineOpValue(MI, MI.getOperand(2));
- // swr src, offset(base)
- // swl src, offset+3(base)
- MCE.emitWordLE(
- (0x2e << 26) | (base << 21) | (src << 16) | (offset & 0xffff));
- MCE.emitWordLE(
- (0x2a << 26) | (base << 21) | (src << 16) | ((offset+3) & 0xffff));
- return 2;
-}
+void MipsCodeEmitter::emitInstruction(MachineBasicBlock::instr_iterator MI,
+ MachineBasicBlock &MBB) {
+ DEBUG(errs() << "JIT: " << (void*)MCE.getCurrentPCValue() << ":\t" << *MI);
-int MipsCodeEmitter::emitULW(const MachineInstr &MI) {
- unsigned dst = getMachineOpValue(MI, MI.getOperand(0));
- unsigned base = getMachineOpValue(MI, MI.getOperand(1));
- unsigned offset = getMachineOpValue(MI, MI.getOperand(2));
- unsigned at = 1;
- if (dst != base) {
- // lwr dst, offset(base)
- // lwl dst, offset+3(base)
- MCE.emitWordLE(
- (0x26 << 26) | (base << 21) | (dst << 16) | (offset & 0xffff));
- MCE.emitWordLE(
- (0x22 << 26) | (base << 21) | (dst << 16) | ((offset+3) & 0xffff));
- return 2;
- } else {
- // lwr at, offset(base)
- // lwl at, offset+3(base)
- // addu dst, at, $zero
- MCE.emitWordLE(
- (0x26 << 26) | (base << 21) | (at << 16) | (offset & 0xffff));
- MCE.emitWordLE(
- (0x22 << 26) | (base << 21) | (at << 16) | ((offset+3) & 0xffff));
- MCE.emitWordLE(
- (0x0 << 26) | (at << 21) | (0x0 << 16) | (dst << 11) | (0x0 << 6) | 0x21);
- return 3;
- }
-}
+ // Expand pseudo instruction. Skip if MI was not expanded.
+ if (((MI->getDesc().TSFlags & MipsII::FormMask) == MipsII::Pseudo) &&
+ !expandPseudos(MI, MBB))
+ return;
-int MipsCodeEmitter::emitUSH(const MachineInstr &MI) {
- unsigned src = getMachineOpValue(MI, MI.getOperand(0));
- unsigned base = getMachineOpValue(MI, MI.getOperand(1));
- unsigned offset = getMachineOpValue(MI, MI.getOperand(2));
- unsigned at = 1;
- // sb src, offset(base)
- // srl at,src,8
- // sb at, offset+1(base)
- MCE.emitWordLE(
- (0x28 << 26) | (base << 21) | (src << 16) | (offset & 0xffff));
- MCE.emitWordLE(
- (0x0 << 26) | (0x0 << 21) | (src << 16) | (at << 11) | (0x8 << 6) | 0x2);
- MCE.emitWordLE(
- (0x28 << 26) | (base << 21) | (at << 16) | ((offset+1) & 0xffff));
- return 3;
-}
+ MCE.processDebugLoc(MI->getDebugLoc(), true);
-int MipsCodeEmitter::emitULH(const MachineInstr &MI) {
- unsigned dst = getMachineOpValue(MI, MI.getOperand(0));
- unsigned base = getMachineOpValue(MI, MI.getOperand(1));
- unsigned offset = getMachineOpValue(MI, MI.getOperand(2));
- unsigned at = 1;
- // lbu at, offset(base)
- // lb dst, offset+1(base)
- // sll dst,dst,8
- // or dst,dst,at
- MCE.emitWordLE(
- (0x24 << 26) | (base << 21) | (at << 16) | (offset & 0xffff));
- MCE.emitWordLE(
- (0x20 << 26) | (base << 21) | (dst << 16) | ((offset+1) & 0xffff));
- MCE.emitWordLE(
- (0x0 << 26) | (0x0 << 21) | (dst << 16) | (dst << 11) | (0x8 << 6) | 0x0);
- MCE.emitWordLE(
- (0x0 << 26) | (dst << 21) | (at << 16) | (dst << 11) | (0x0 << 6) | 0x25);
- return 4;
-}
+ emitWord(getBinaryCodeForInstr(*MI));
+ ++NumEmitted; // Keep track of the # of mi's emitted
-int MipsCodeEmitter::emitULHu(const MachineInstr &MI) {
- unsigned dst = getMachineOpValue(MI, MI.getOperand(0));
- unsigned base = getMachineOpValue(MI, MI.getOperand(1));
- unsigned offset = getMachineOpValue(MI, MI.getOperand(2));
- unsigned at = 1;
- // lbu at, offset(base)
- // lbu dst, offset+1(base)
- // sll dst,dst,8
- // or dst,dst,at
- MCE.emitWordLE(
- (0x24 << 26) | (base << 21) | (at << 16) | (offset & 0xffff));
- MCE.emitWordLE(
- (0x24 << 26) | (base << 21) | (dst << 16) | ((offset+1) & 0xffff));
- MCE.emitWordLE(
- (0x0 << 26) | (0x0 << 21) | (dst << 16) | (dst << 11) | (0x8 << 6) | 0x0);
- MCE.emitWordLE(
- (0x0 << 26) | (dst << 21) | (at << 16) | (dst << 11) | (0x0 << 6) | 0x25);
- return 4;
+ MCE.processDebugLoc(MI->getDebugLoc(), false);
}
-void MipsCodeEmitter::emitInstruction(const MachineInstr &MI) {
- DEBUG(errs() << "JIT: " << (void*)MCE.getCurrentPCValue() << ":\t" << MI);
-
- MCE.processDebugLoc(MI.getDebugLoc(), true);
-
- // Skip pseudo instructions.
- if ((MI.getDesc().TSFlags & MipsII::FormMask) == MipsII::Pseudo)
- return;
+void MipsCodeEmitter::emitWord(unsigned Word) {
+ DEBUG(errs() << " 0x";
+ errs().write_hex(Word) << "\n");
+ if (Subtarget->isLittle())
+ MCE.emitWordLE(Word);
+ else
+ MCE.emitWordBE(Word);
+}
+void MipsCodeEmitter::expandACCInstr(MachineBasicBlock::instr_iterator MI,
+ MachineBasicBlock &MBB,
+ unsigned Opc) const {
+ // Expand "pseudomult $ac0, $t0, $t1" to "mult $t0, $t1".
+ BuildMI(MBB, &*MI, MI->getDebugLoc(), II->get(Opc))
+ .addReg(MI->getOperand(1).getReg()).addReg(MI->getOperand(2).getReg());
+}
- switch (MI.getOpcode()) {
- case Mips::USW:
- NumEmitted += emitUSW(MI);
+bool MipsCodeEmitter::expandPseudos(MachineBasicBlock::instr_iterator &MI,
+ MachineBasicBlock &MBB) const {
+ switch (MI->getOpcode()) {
+ case Mips::NOP:
+ BuildMI(MBB, &*MI, MI->getDebugLoc(), II->get(Mips::SLL), Mips::ZERO)
+ .addReg(Mips::ZERO).addImm(0);
break;
- case Mips::ULW:
- NumEmitted += emitULW(MI);
+ case Mips::B:
+ BuildMI(MBB, &*MI, MI->getDebugLoc(), II->get(Mips::BEQ)).addReg(Mips::ZERO)
+ .addReg(Mips::ZERO).addOperand(MI->getOperand(0));
break;
- case Mips::ULH:
- NumEmitted += emitULH(MI);
+ case Mips::TRAP:
+ BuildMI(MBB, &*MI, MI->getDebugLoc(), II->get(Mips::BREAK)).addImm(0)
+ .addImm(0);
break;
- case Mips::ULHu:
- NumEmitted += emitULHu(MI);
+ case Mips::JALRPseudo:
+ BuildMI(MBB, &*MI, MI->getDebugLoc(), II->get(Mips::JALR), Mips::RA)
+ .addReg(MI->getOperand(0).getReg());
break;
- case Mips::USH:
- NumEmitted += emitUSH(MI);
+ case Mips::PseudoMULT:
+ expandACCInstr(MI, MBB, Mips::MULT);
break;
-
- default:
- emitWordLE(getBinaryCodeForInstr(MI));
- ++NumEmitted; // Keep track of the # of mi's emitted
+ case Mips::PseudoMULTu:
+ expandACCInstr(MI, MBB, Mips::MULTu);
+ break;
+ case Mips::PseudoSDIV:
+ expandACCInstr(MI, MBB, Mips::SDIV);
+ break;
+ case Mips::PseudoUDIV:
+ expandACCInstr(MI, MBB, Mips::UDIV);
break;
+ case Mips::PseudoMADD:
+ expandACCInstr(MI, MBB, Mips::MADD);
+ break;
+ case Mips::PseudoMADDU:
+ expandACCInstr(MI, MBB, Mips::MADDU);
+ break;
+ case Mips::PseudoMSUB:
+ expandACCInstr(MI, MBB, Mips::MSUB);
+ break;
+ case Mips::PseudoMSUBU:
+ expandACCInstr(MI, MBB, Mips::MSUBU);
+ break;
+ default:
+ return false;
}
- MCE.processDebugLoc(MI.getDebugLoc(), false);
-}
-
-void MipsCodeEmitter::emitWordLE(unsigned Word) {
- DEBUG(errs() << " 0x";
- errs().write_hex(Word) << "\n");
- MCE.emitWordLE(Word);
+ (MI--)->eraseFromBundle();
+ return true;
}
/// createMipsJITCodeEmitterPass - Return a pass that emits the collected Mips
projects / oota-llvm.git / blobdiff