-//===-- PPCCodeEmitter.cpp - JIT Code Emitter for PowerPC32 -------*- C++ -*-=//
+//===-- PPCCodeEmitter.cpp - JIT Code Emitter for PowerPC -----------------===//
//
// The LLVM Compiler Infrastructure
//
//
//===----------------------------------------------------------------------===//
-#include "PPCTargetMachine.h"
-#include "PPCRelocations.h"
#include "PPC.h"
-#include "llvm/Module.h"
-#include "llvm/PassManager.h"
+#include "PPCRelocations.h"
+#include "PPCTargetMachine.h"
#include "llvm/CodeGen/JITCodeEmitter.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
+#include "llvm/IR/Module.h"
+#include "llvm/PassManager.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetOptions.h"
JITCodeEmitter &MCE;
MachineModuleInfo *MMI;
- void getAnalysisUsage(AnalysisUsage &AU) const {
+ void getAnalysisUsage(AnalysisUsage &AU) const override {
AU.addRequired<MachineModuleInfo>();
MachineFunctionPass::getAnalysisUsage(AU);
}
/// getBinaryCodeForInstr - This function, generated by the
/// CodeEmitterGenerator using TableGen, produces the binary encoding for
/// machine instructions.
- unsigned getBinaryCodeForInstr(const MachineInstr &MI) const;
+ uint64_t getBinaryCodeForInstr(const MachineInstr &MI) const;
MachineRelocation GetRelocation(const MachineOperand &MO,
const MachineOperand &MO) const;
unsigned get_crbitm_encoding(const MachineInstr &MI, unsigned OpNo) const;
- unsigned getCallTargetEncoding(const MachineInstr &MI, unsigned OpNo) const;
-
- const char *getPassName() const { return "PowerPC Machine Code Emitter"; }
+ unsigned getDirectBrEncoding(const MachineInstr &MI, unsigned OpNo) const;
+ unsigned getCondBrEncoding(const MachineInstr &MI, unsigned OpNo) const;
+ unsigned getAbsDirectBrEncoding(const MachineInstr &MI,
+ unsigned OpNo) const;
+ unsigned getAbsCondBrEncoding(const MachineInstr &MI, unsigned OpNo) const;
+
+ unsigned getImm16Encoding(const MachineInstr &MI, unsigned OpNo) const;
+ unsigned getMemRIEncoding(const MachineInstr &MI, unsigned OpNo) const;
+ unsigned getMemRIXEncoding(const MachineInstr &MI, unsigned OpNo) const;
+ unsigned getTLSRegEncoding(const MachineInstr &MI, unsigned OpNo) const;
+ unsigned getTLSCallEncoding(const MachineInstr &MI, unsigned OpNo) const;
+
+ const char *getPassName() const override {
+ return "PowerPC Machine Code Emitter";
+ }
/// runOnMachineFunction - emits the given MachineFunction to memory
///
- bool runOnMachineFunction(MachineFunction &MF);
+ bool runOnMachineFunction(MachineFunction &MF) override;
/// emitBasicBlock - emits the given MachineBasicBlock to memory
///
MMI = &getAnalysis<MachineModuleInfo>();
MCE.setModuleInfo(MMI);
do {
- MovePCtoLROffset = 0;
+ MovePCtoLROffset = nullptr;
MCE.startFunction(MF);
for (MachineFunction::iterator BB = MF.begin(), E = MF.end(); BB != E; ++BB)
emitBasicBlock(*BB);
default:
MCE.emitWordBE(getBinaryCodeForInstr(MI));
break;
- case TargetOpcode::PROLOG_LABEL:
+ case TargetOpcode::CFI_INSTRUCTION:
+ break;
case TargetOpcode::EH_LABEL:
MCE.emitLabel(MI.getOperand(0).getMCSymbol());
break;
unsigned PPCCodeEmitter::get_crbitm_encoding(const MachineInstr &MI,
unsigned OpNo) const {
const MachineOperand &MO = MI.getOperand(OpNo);
- assert((MI.getOpcode() == PPC::MTCRF || MI.getOpcode() == PPC::MFOCRF) &&
+ assert((MI.getOpcode() == PPC::MTOCRF || MI.getOpcode() == PPC::MTOCRF8 ||
+ MI.getOpcode() == PPC::MFOCRF || MI.getOpcode() == PPC::MFOCRF8) &&
(MO.getReg() >= PPC::CR0 && MO.getReg() <= PPC::CR7));
- return 0x80 >> PPCRegisterInfo::getRegisterNumbering(MO.getReg());
+ return 0x80 >> TM.getSubtargetImpl()->getRegisterInfo()->getEncodingValue(
+ MO.getReg());
}
MachineRelocation PPCCodeEmitter::GetRelocation(const MachineOperand &MO,
unsigned RelocID) const {
+ // If in PIC mode, we need to encode the negated address of the
+ // 'movepctolr' into the unrelocated field. After relocation, we'll have
+ // &gv-&movepctolr-4 in the imm field. Once &movepctolr is added to the imm
+ // field, we get &gv. This doesn't happen for branch relocations, which are
+ // always implicitly pc relative.
+ intptr_t Cst = 0;
+ if (TM.getRelocationModel() == Reloc::PIC_) {
+ assert(MovePCtoLROffset && "MovePCtoLR not seen yet?");
+ Cst = -(intptr_t)MovePCtoLROffset - 4;
+ }
+
if (MO.isGlobal())
return MachineRelocation::getGV(MCE.getCurrentPCOffset(), RelocID,
- const_cast<GlobalValue *>(MO.getGlobal()),0,
- isa<Function>(MO.getGlobal()));
+ const_cast<GlobalValue *>(MO.getGlobal()),
+ Cst, isa<Function>(MO.getGlobal()));
if (MO.isSymbol())
return MachineRelocation::getExtSym(MCE.getCurrentPCOffset(),
- RelocID, MO.getSymbolName(), 0);
+ RelocID, MO.getSymbolName(), Cst);
if (MO.isCPI())
return MachineRelocation::getConstPool(MCE.getCurrentPCOffset(),
- RelocID, MO.getIndex(), 0);
+ RelocID, MO.getIndex(), Cst);
if (MO.isMBB())
- MCE.addRelocation(MachineRelocation::getBB(MCE.getCurrentPCOffset(),
- RelocID, MO.getMBB()));
+ return MachineRelocation::getBB(MCE.getCurrentPCOffset(),
+ RelocID, MO.getMBB());
assert(MO.isJTI());
return MachineRelocation::getJumpTable(MCE.getCurrentPCOffset(),
- RelocID, MO.getIndex(), 0);
+ RelocID, MO.getIndex(), Cst);
}
-unsigned PPCCodeEmitter::getCallTargetEncoding(const MachineInstr &MI,
- unsigned OpNo) const {
+unsigned PPCCodeEmitter::getDirectBrEncoding(const MachineInstr &MI,
+ unsigned OpNo) const {
const MachineOperand &MO = MI.getOperand(OpNo);
if (MO.isReg() || MO.isImm()) return getMachineOpValue(MI, MO);
return 0;
}
+unsigned PPCCodeEmitter::getCondBrEncoding(const MachineInstr &MI,
+ unsigned OpNo) const {
+ const MachineOperand &MO = MI.getOperand(OpNo);
+ MCE.addRelocation(GetRelocation(MO, PPC::reloc_pcrel_bcx));
+ return 0;
+}
-unsigned PPCCodeEmitter::getMachineOpValue(const MachineInstr &MI,
- const MachineOperand &MO) const {
+unsigned PPCCodeEmitter::getAbsDirectBrEncoding(const MachineInstr &MI,
+ unsigned OpNo) const {
+ const MachineOperand &MO = MI.getOperand(OpNo);
+ if (MO.isReg() || MO.isImm()) return getMachineOpValue(MI, MO);
- if (MO.isReg()) {
- assert(MI.getOpcode() != PPC::MTCRF && MI.getOpcode() != PPC::MFOCRF);
- return PPCRegisterInfo::getRegisterNumbering(MO.getReg());
+ llvm_unreachable("Absolute branch relocations unsupported on the old JIT.");
+}
+
+unsigned PPCCodeEmitter::getAbsCondBrEncoding(const MachineInstr &MI,
+ unsigned OpNo) const {
+ llvm_unreachable("Absolute branch relocations unsupported on the old JIT.");
+}
+
+unsigned PPCCodeEmitter::getImm16Encoding(const MachineInstr &MI,
+ unsigned OpNo) const {
+ const MachineOperand &MO = MI.getOperand(OpNo);
+ if (MO.isReg() || MO.isImm()) return getMachineOpValue(MI, MO);
+
+ unsigned RelocID;
+ switch (MO.getTargetFlags() & PPCII::MO_ACCESS_MASK) {
+ default: llvm_unreachable("Unsupported target operand flags!");
+ case PPCII::MO_LO: RelocID = PPC::reloc_absolute_low; break;
+ case PPCII::MO_HA: RelocID = PPC::reloc_absolute_high; break;
}
+
+ MCE.addRelocation(GetRelocation(MO, RelocID));
+ return 0;
+}
+
+unsigned PPCCodeEmitter::getMemRIEncoding(const MachineInstr &MI,
+ unsigned OpNo) const {
+ // Encode (imm, reg) as a memri, which has the low 16-bits as the
+ // displacement and the next 5 bits as the register #.
+ assert(MI.getOperand(OpNo+1).isReg());
+ unsigned RegBits = getMachineOpValue(MI, MI.getOperand(OpNo+1)) << 16;
+ const MachineOperand &MO = MI.getOperand(OpNo);
if (MO.isImm())
- return MO.getImm();
+ return (getMachineOpValue(MI, MO) & 0xFFFF) | RegBits;
- if (MO.isGlobal() || MO.isSymbol() || MO.isCPI() || MO.isJTI()) {
- unsigned Reloc = 0;
- assert((TM.getRelocationModel() != Reloc::PIC_ || MovePCtoLROffset) &&
- "MovePCtoLR not seen yet?");
- switch (MI.getOpcode()) {
- default: MI.dump(); llvm_unreachable("Unknown instruction for relocation!");
- case PPC::LIS:
- case PPC::LIS8:
- case PPC::ADDIS:
- case PPC::ADDIS8:
- Reloc = PPC::reloc_absolute_high; // Pointer to symbol
- break;
- case PPC::LI:
- case PPC::LI8:
- case PPC::LA:
- // Loads.
- case PPC::LBZ:
- case PPC::LBZ8:
- case PPC::LHA:
- case PPC::LHA8:
- case PPC::LHZ:
- case PPC::LHZ8:
- case PPC::LWZ:
- case PPC::LWZ8:
- case PPC::LFS:
- case PPC::LFD:
-
- // Stores.
- case PPC::STB:
- case PPC::STB8:
- case PPC::STH:
- case PPC::STH8:
- case PPC::STW:
- case PPC::STW8:
- case PPC::STFS:
- case PPC::STFD:
- Reloc = PPC::reloc_absolute_low;
- break;
+ // Add a fixup for the displacement field.
+ MCE.addRelocation(GetRelocation(MO, PPC::reloc_absolute_low));
+ return RegBits;
+}
- case PPC::LWA:
- case PPC::LD:
- case PPC::STD:
- case PPC::STD_32:
- Reloc = PPC::reloc_absolute_low_ix;
- break;
- }
+unsigned PPCCodeEmitter::getMemRIXEncoding(const MachineInstr &MI,
+ unsigned OpNo) const {
+ // Encode (imm, reg) as a memrix, which has the low 14-bits as the
+ // displacement and the next 5 bits as the register #.
+ assert(MI.getOperand(OpNo+1).isReg());
+ unsigned RegBits = getMachineOpValue(MI, MI.getOperand(OpNo+1)) << 14;
+
+ const MachineOperand &MO = MI.getOperand(OpNo);
+ if (MO.isImm())
+ return ((getMachineOpValue(MI, MO) >> 2) & 0x3FFF) | RegBits;
+
+ MCE.addRelocation(GetRelocation(MO, PPC::reloc_absolute_low_ix));
+ return RegBits;
+}
- MachineRelocation R = GetRelocation(MO, Reloc);
- // If in PIC mode, we need to encode the negated address of the
- // 'movepctolr' into the unrelocated field. After relocation, we'll have
- // &gv-&movepctolr-4 in the imm field. Once &movepctolr is added to the imm
- // field, we get &gv. This doesn't happen for branch relocations, which are
- // always implicitly pc relative.
- if (TM.getRelocationModel() == Reloc::PIC_) {
- assert(MovePCtoLROffset && "MovePCtoLR not seen yet?");
- R.setConstantVal(-(intptr_t)MovePCtoLROffset - 4);
- }
- MCE.addRelocation(R);
-
- } else if (MO.isMBB()) {
- unsigned Reloc = 0;
- unsigned Opcode = MI.getOpcode();
- if (Opcode == PPC::B)
- Reloc = PPC::reloc_pcrel_bx;
- else // BCC instruction
- Reloc = PPC::reloc_pcrel_bcx;
-
- MCE.addRelocation(MachineRelocation::getBB(MCE.getCurrentPCOffset(),
- Reloc, MO.getMBB()));
- } else {
-#ifndef NDEBUG
- errs() << "ERROR: Unknown type of MachineOperand: " << MO << "\n";
-#endif
- llvm_unreachable(0);
- }
+unsigned PPCCodeEmitter::getTLSRegEncoding(const MachineInstr &MI,
+ unsigned OpNo) const {
+ llvm_unreachable("TLS not supported on the old JIT.");
+ return 0;
+}
+unsigned PPCCodeEmitter::getTLSCallEncoding(const MachineInstr &MI,
+ unsigned OpNo) const {
+ llvm_unreachable("TLS not supported on the old JIT.");
return 0;
}
+unsigned PPCCodeEmitter::getMachineOpValue(const MachineInstr &MI,
+ const MachineOperand &MO) const {
+
+ if (MO.isReg()) {
+ // MTOCRF/MFOCRF should go through get_crbitm_encoding for the CR operand.
+ // The GPR operand should come through here though.
+ assert((MI.getOpcode() != PPC::MTOCRF && MI.getOpcode() != PPC::MTOCRF8 &&
+ MI.getOpcode() != PPC::MFOCRF && MI.getOpcode() != PPC::MFOCRF8) ||
+ MO.getReg() < PPC::CR0 || MO.getReg() > PPC::CR7);
+ return TM.getSubtargetImpl()->getRegisterInfo()->getEncodingValue(
+ MO.getReg());
+ }
+
+ assert(MO.isImm() &&
+ "Relocation required in an instruction that we cannot encode!");
+ return MO.getImm();
+}
+
#include "PPCGenCodeEmitter.inc"
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