diff options
Diffstat (limited to 'lib/Target/ARM')
| -rw-r--r-- | lib/Target/ARM/ARMInstrThumb2.td | 10 | ||||
| -rw-r--r-- | lib/Target/ARM/AsmParser/ARMAsmParser.cpp | 20 |
2 files changed, 30 insertions, 0 deletions
diff --git a/lib/Target/ARM/ARMInstrThumb2.td b/lib/Target/ARM/ARMInstrThumb2.td index 8e5e8c1..842f337 100644 --- a/lib/Target/ARM/ARMInstrThumb2.td +++ b/lib/Target/ARM/ARMInstrThumb2.td @@ -3599,6 +3599,16 @@ def t2RFEIA : T2RFE<0b111010011001, (outs), (ins GPR:$Rn), NoItinerary, "rfeia", "\t$Rn", [/* For disassembly only; pattern left blank */]>; +// B9.3.19 SUBS PC, LR, #imm (Thumb2) system instruction. +let Defs = [PC], Uses = [LR] in +def t2SUBS_PC_LR : T2I <(outs), (ins imm0_255:$imm), NoItinerary, + "subs", "\tpc, lr, $imm", []>, Requires<[IsThumb2]> { + let Inst{31-8} = 0b111100111101111010001111; + + bits<8> imm; + let Inst{7-0} = imm; +} + //===----------------------------------------------------------------------===// // Non-Instruction Patterns // diff --git a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp index 6d885a0..8e56a1a 100644 --- a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp +++ b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp @@ -5138,6 +5138,26 @@ bool ARMAsmParser::ParseInstruction(ParseInstructionInfo &Info, StringRef Name, } } + // FIXME: As said above, this is all a pretty gross hack. This instruction + // does not fit with other "subs" and tblgen. + // Adjust operands of B9.3.19 SUBS PC, LR, #imm (Thumb2) system instruction + // so the Mnemonic is the original name "subs" and delete the predicate + // operand so it will match the table entry. + if (isThumbTwo() && Mnemonic == "sub" && Operands.size() == 6 && + static_cast<ARMOperand*>(Operands[3])->isReg() && + static_cast<ARMOperand*>(Operands[3])->getReg() == ARM::PC && + static_cast<ARMOperand*>(Operands[4])->isReg() && + static_cast<ARMOperand*>(Operands[4])->getReg() == ARM::LR && + static_cast<ARMOperand*>(Operands[5])->isImm()) { + ARMOperand *Op0 = static_cast<ARMOperand*>(Operands[0]); + Operands.erase(Operands.begin()); + delete Op0; + Operands.insert(Operands.begin(), ARMOperand::CreateToken(Name, NameLoc)); + + ARMOperand *Op1 = static_cast<ARMOperand*>(Operands[1]); + Operands.erase(Operands.begin() + 1); + delete Op1; + } return false; } |