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| author | Jim Grosbach <grosbach@apple.com> | 2011-08-22 23:47:13 +0000 |
|---|---|---|
| committer | Jim Grosbach <grosbach@apple.com> | 2011-08-22 23:47:13 +0000 |
| commit | 934755ac040c516eac7fdd974e87590543acd16a (patch) | |
| tree | 0ebc089777e1e5fabf085e96983e62fb0d86a2af | |
| parent | 8e1e60b5f8fd9c6233bdb8814ee40887555a0594 (diff) | |
Thumb parsing and encoding for RSB.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138308 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Target/ARM/AsmParser/ARMAsmParser.cpp | 13 | ||||
| -rw-r--r-- | test/MC/ARM/basic-thumb-instructions.s | 8 |
2 files changed, 21 insertions, 0 deletions
diff --git a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp index 1ca3e1d120..6bb59d4fa9 100644 --- a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp +++ b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp @@ -3029,6 +3029,19 @@ bool ARMAsmParser::ParseInstruction(StringRef Name, SMLoc NameLoc, delete Op; } } + // Similarly, the Thumb1 "RSB" instruction has a literal "#0" on the + // end. Convert it to a token here. + if (Mnemonic == "rsb" && isThumb() && Operands.size() == 6 && + static_cast<ARMOperand*>(Operands[5])->isImm()) { + ARMOperand *Op = static_cast<ARMOperand*>(Operands[5]); + const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op->getImm()); + if (CE && CE->getValue() == 0) { + Operands.erase(Operands.begin() + 5); + Operands.push_back(ARMOperand::CreateToken("#0", Op->getStartLoc())); + delete Op; + } + } + return false; } diff --git a/test/MC/ARM/basic-thumb-instructions.s b/test/MC/ARM/basic-thumb-instructions.s index 2fc050b1d3..d7b902bcda 100644 --- a/test/MC/ARM/basic-thumb-instructions.s +++ b/test/MC/ARM/basic-thumb-instructions.s @@ -399,3 +399,11 @@ _func: rors r2, r7 @ CHECK: rors r2, r7 @ encoding: [0xfa,0x41] + + +@------------------------------------------------------------------------------ +@ RSB +@------------------------------------------------------------------------------ + rsbs r1, r3, #0 + + rsbs r1, r3, #0 @ encoding: [0x59,0x42] |