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Implement PPC64 relocations types

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29125 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-07-12 21:23:20 +00:00
parent 3d6721a4a1
commit 3bc8a765a9
3 changed files with 36 additions and 5 deletions
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23
lib/Target/PowerPC/PPCCodeEmitter.cpp
View File

@ -162,16 +162,23 @@ int PPCCodeEmitter::getMachineOpValue(MachineInstr &MI, MachineOperand &MO) {
switch (MI.getOpcode()) {
default: DEBUG(MI.dump()); assert(0 && "Unknown instruction for relocation!");
case PPC::LIS:
case PPC::LIS8:
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::LHA:
case PPC::LHZ:
case PPC::LWZ:
case PPC::LFS:
case PPC::LFD:
case PPC::LWZ8:
// Stores.
case PPC::STB:
case PPC::STH:
case PPC::STW:
@ -179,6 +186,13 @@ int PPCCodeEmitter::getMachineOpValue(MachineInstr &MI, MachineOperand &MO) {
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;
}
}
if (MO.isGlobalAddress())
@ -197,16 +211,19 @@ int PPCCodeEmitter::getMachineOpValue(MachineInstr &MI, MachineOperand &MO) {
rv = MCE.getJumpTableEntryAddress(MO.getJumpTableIndex());
unsigned Opcode = MI.getOpcode();
if (Opcode == PPC::LIS || Opcode == PPC::ADDIS) {
if (Opcode == PPC::LIS || Opcode == PPC::LIS8 ||
Opcode == PPC::ADDIS || Opcode == PPC::ADDIS8) {
// lis wants hi16(addr)
if ((short)rv < 0) rv += 1 << 16;
rv >>= 16;
} else if (Opcode == PPC::LWZ || Opcode == PPC::LA ||
Opcode == PPC::LI ||
} else if (Opcode == PPC::LWZ || Opcode == PPC::LWZ8 ||
Opcode == PPC::LA ||
Opcode == PPC::LI || Opcode == PPC::LI8 ||
Opcode == PPC::LFS || Opcode == PPC::LFD) {
// These load opcodes want lo16(addr)
rv &= 0xffff;
} else {
MI.dump();
assert(0 && "Unknown constant pool or jump table using instruction!");
}
} else {

12
lib/Target/PowerPC/PPCJITInfo.cpp
View File

@ -207,7 +207,7 @@ void PPCJITInfo::relocate(void *Function, MachineRelocation *MR,
case PPC::reloc_absolute_ptr_high: // Pointer relocations.
case PPC::reloc_absolute_ptr_low:
case PPC::reloc_absolute_high: // high bits of ref -> low 16 of instr
case PPC::reloc_absolute_low: // low bits of ref -> low 16 of instr
case PPC::reloc_absolute_low: { // low bits of ref -> low 16 of instr
ResultPtr += MR->getConstantVal();
// If this is a high-part access, get the high-part.
@ -227,6 +227,16 @@ void PPCJITInfo::relocate(void *Function, MachineRelocation *MR,
*RelocPos = LowBits | HighBits; // Slam into low 16-bits
break;
}
case PPC::reloc_absolute_low_ix: { // low bits of ref -> low 14 of instr
ResultPtr += MR->getConstantVal();
// Do the addition then mask, so the addition does not overflow the 16-bit
// immediate section of the instruction.
unsigned LowBits = (*RelocPos + ResultPtr) & 0xFFFC;
unsigned HighBits = *RelocPos & 0xFFFF0003;
*RelocPos = LowBits | HighBits; // Slam into low 14-bits.
break;
}
}
}
}

6
lib/Target/PowerPC/PPCRelocations.h
View File

@ -34,9 +34,13 @@ namespace llvm {
reloc_absolute_high,
// reloc_absolute_low - Absolute relocation, for the la instruction (which
// is really an addi). Add the low 16-bits of teh specified global
// is really an addi). Add the low 16-bits of the specified global
// address into the low 16-bits of the instruction.
reloc_absolute_low,
// reloc_absolute_low_ix - Absolute relocation for the 64-bit load/store
// instruction which have two implicit zero bits.
reloc_absolute_low_ix,
// reloc_absolute_ptr_high - Absolute relocation for references to lazy
// pointer stubs. In this case, the relocated instruction should be