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Thumb parsing and encoding for RSB.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138308 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -3029,6 +3029,19 @@ bool ARMAsmParser::ParseInstruction(StringRef Name, SMLoc NameLoc,
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delete Op;
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}
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}
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// Similarly, the Thumb1 "RSB" instruction has a literal "#0" on the
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// end. Convert it to a token here.
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if (Mnemonic == "rsb" && isThumb() && Operands.size() == 6 &&
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static_cast<ARMOperand*>(Operands[5])->isImm()) {
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ARMOperand *Op = static_cast<ARMOperand*>(Operands[5]);
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const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op->getImm());
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if (CE && CE->getValue() == 0) {
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Operands.erase(Operands.begin() + 5);
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Operands.push_back(ARMOperand::CreateToken("#0", Op->getStartLoc()));
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delete Op;
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}
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}
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return false;
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}
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@ -399,3 +399,11 @@ _func:
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rors r2, r7
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@ CHECK: rors r2, r7 @ encoding: [0xfa,0x41]
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@------------------------------------------------------------------------------
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@ RSB
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@------------------------------------------------------------------------------
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rsbs r1, r3, #0
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rsbs r1, r3, #0 @ encoding: [0x59,0x42]
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