diff options
Diffstat (limited to 'llvm/lib/Target/PowerPC/Disassembler/PPCDisassembler.cpp')
| -rw-r--r-- | llvm/lib/Target/PowerPC/Disassembler/PPCDisassembler.cpp | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/llvm/lib/Target/PowerPC/Disassembler/PPCDisassembler.cpp b/llvm/lib/Target/PowerPC/Disassembler/PPCDisassembler.cpp index 3e9286f..706f6df4 100644 --- a/llvm/lib/Target/PowerPC/Disassembler/PPCDisassembler.cpp +++ b/llvm/lib/Target/PowerPC/Disassembler/PPCDisassembler.cpp @@ -279,6 +279,23 @@ static DecodeStatus decodeMemRIXOperands(MCInst &Inst, uint64_t Imm, return MCDisassembler::Success; } +static DecodeStatus decodeMemRIHashOperands(MCInst &Inst, uint64_t Imm, + int64_t Address, + const void *Decoder) { + // Decode the memrix field for a hash store or hash check operation. + // The field is composed of a register and an immediate value that is 6 bits + // and covers the range -8 to -512. The immediate is always negative and 2s + // complement which is why we sign extend a 7 bit value. + const uint64_t Base = Imm >> 6; + const uint64_t Disp = SignExtend64<7>((Imm & 0x3F) + 64) << 3; + + assert(Base < 32 && "Invalid base register"); + + Inst.addOperand(MCOperand::createImm(Disp)); + Inst.addOperand(MCOperand::createReg(RRegs[Base])); + return MCDisassembler::Success; +} + static DecodeStatus decodeMemRIX16Operands(MCInst &Inst, uint64_t Imm, int64_t Address, const void *Decoder) { // Decode the memrix16 field (imm, reg), which has the low 12-bits as the |