public:
PPCCodeEmitter(TargetMachine &tm, JITCodeEmitter &mce)
- : MachineFunctionPass(&ID), TM(tm), MCE(mce) {}
+ : MachineFunctionPass(ID), TM(tm), MCE(mce) {}
/// getBinaryCodeForInstr - This function, generated by the
/// CodeEmitterGenerator using TableGen, produces the binary encoding for
/// machine instructions.
+ unsigned getBinaryCodeForInstr(const MachineInstr &MI) const;
- unsigned getBinaryCodeForInstr(const MachineInstr &MI);
-
+
+ MachineRelocation GetRelocation(const MachineOperand &MO,
+ unsigned RelocID) const;
+
/// getMachineOpValue - evaluates the MachineOperand of a given MachineInstr
-
unsigned getMachineOpValue(const MachineInstr &MI,
- 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"; }
/// runOnMachineFunction - emits the given MachineFunction to memory
/// emitBasicBlock - emits the given MachineBasicBlock to memory
///
void emitBasicBlock(MachineBasicBlock &MBB);
-
- /// getValueBit - return the particular bit of Val
- ///
- unsigned getValueBit(int64_t Val, unsigned bit) { return (Val >> bit) & 1; }
};
}
default:
MCE.emitWordBE(getBinaryCodeForInstr(MI));
break;
- case TargetOpcode::DBG_LABEL:
+ case TargetOpcode::PROLOG_LABEL:
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) &&
+ (MO.getReg() >= PPC::CR0 && MO.getReg() <= PPC::CR7));
+ return 0x80 >> PPCRegisterInfo::getRegisterNumbering(MO.getReg());
+}
+
+MachineRelocation PPCCodeEmitter::GetRelocation(const MachineOperand &MO,
+ unsigned RelocID) const {
+ if (MO.isGlobal())
+ return MachineRelocation::getGV(MCE.getCurrentPCOffset(), RelocID,
+ const_cast<GlobalValue *>(MO.getGlobal()),0,
+ isa<Function>(MO.getGlobal()));
+ if (MO.isSymbol())
+ return MachineRelocation::getExtSym(MCE.getCurrentPCOffset(),
+ RelocID, MO.getSymbolName(), 0);
+ if (MO.isCPI())
+ return MachineRelocation::getConstPool(MCE.getCurrentPCOffset(),
+ RelocID, MO.getIndex(), 0);
+
+ if (MO.isMBB())
+ MCE.addRelocation(MachineRelocation::getBB(MCE.getCurrentPCOffset(),
+ RelocID, MO.getMBB()));
+
+ assert(MO.isJTI());
+ return MachineRelocation::getJumpTable(MCE.getCurrentPCOffset(),
+ RelocID, MO.getIndex(), 0);
+}
+
+unsigned PPCCodeEmitter::getCallTargetEncoding(const MachineInstr &MI,
+ unsigned OpNo) const {
+ const MachineOperand &MO = MI.getOperand(OpNo);
+ if (MO.isReg() || MO.isImm()) return getMachineOpValue(MI, MO);
+
+ MCE.addRelocation(GetRelocation(MO, PPC::reloc_pcrel_bx));
+ return 0;
+}
+
+
unsigned PPCCodeEmitter::getMachineOpValue(const MachineInstr &MI,
- const MachineOperand &MO) {
+ const MachineOperand &MO) const {
- unsigned rv = 0; // Return value; defaults to 0 for unhandled cases
- // or things that get fixed up later by the JIT.
if (MO.isReg()) {
- rv = PPCRegisterInfo::getRegisterNumbering(MO.getReg());
-
- // Special encoding for MTCRF and MFOCRF, which uses a bit mask for the
- // register, not the register number directly.
- if ((MI.getOpcode() == PPC::MTCRF || MI.getOpcode() == PPC::MFOCRF) &&
- (MO.getReg() >= PPC::CR0 && MO.getReg() <= PPC::CR7)) {
- rv = 0x80 >> rv;
- }
- } else if (MO.isImm()) {
- rv = MO.getImm();
- } else if (MO.isGlobal() || MO.isSymbol() ||
- MO.isCPI() || MO.isJTI()) {
+ assert(MI.getOpcode() != PPC::MTCRF && MI.getOpcode() != PPC::MFOCRF);
+ return PPCRegisterInfo::getRegisterNumbering(MO.getReg());
+ }
+
+ if (MO.isImm())
+ return MO.getImm();
+
+ if (MO.isGlobal() || MO.isSymbol() || MO.isCPI() || MO.isJTI()) {
unsigned Reloc = 0;
- if (MI.getOpcode() == PPC::BL_Darwin || MI.getOpcode() == PPC::BL8_Darwin ||
- MI.getOpcode() == PPC::BL_SVR4 || MI.getOpcode() == PPC::BL8_ELF ||
- MI.getOpcode() == PPC::TAILB || MI.getOpcode() == PPC::TAILB8)
- Reloc = PPC::reloc_pcrel_bx;
- else {
- if (TM.getRelocationModel() == Reloc::PIC_) {
- assert(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;
-
- case PPC::LWA:
- case PPC::LD:
- case PPC::STD:
- case PPC::STD_32:
- Reloc = PPC::reloc_absolute_low_ix;
- break;
- }
- }
+ 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;
- MachineRelocation R;
- if (MO.isGlobal()) {
- R = MachineRelocation::getGV(MCE.getCurrentPCOffset(), Reloc,
- MO.getGlobal(), 0,
- isa<Function>(MO.getGlobal()));
- } else if (MO.isSymbol()) {
- R = MachineRelocation::getExtSym(MCE.getCurrentPCOffset(),
- Reloc, MO.getSymbolName(), 0);
- } else if (MO.isCPI()) {
- R = MachineRelocation::getConstPool(MCE.getCurrentPCOffset(),
- Reloc, MO.getIndex(), 0);
- } else {
- assert(MO.isJTI());
- R = MachineRelocation::getJumpTable(MCE.getCurrentPCOffset(),
- Reloc, MO.getIndex(), 0);
+ case PPC::LWA:
+ case PPC::LD:
+ case PPC::STD:
+ case PPC::STD_32:
+ Reloc = PPC::reloc_absolute_low_ix;
+ break;
}
+ 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_ && Reloc != PPC::reloc_pcrel_bx){
+ if (TM.getRelocationModel() == Reloc::PIC_) {
assert(MovePCtoLROffset && "MovePCtoLR not seen yet?");
R.setConstantVal(-(intptr_t)MovePCtoLROffset - 4);
}
} else if (MO.isMBB()) {
unsigned Reloc = 0;
unsigned Opcode = MI.getOpcode();
- if (Opcode == PPC::B || Opcode == PPC::BL_Darwin ||
- Opcode == PPC::BLA_Darwin|| Opcode == PPC::BL_SVR4 ||
- Opcode == PPC::BLA_SVR4)
+ if (Opcode == PPC::B)
Reloc = PPC::reloc_pcrel_bx;
else // BCC instruction
Reloc = PPC::reloc_pcrel_bcx;
llvm_unreachable(0);
}
- return rv;
+ return 0;
}
#include "PPCGenCodeEmitter.inc"
projects / oota-llvm.git / blobdiff