From b6aed508e310e31dcb080e761ca856127cec0773 Mon Sep 17 00:00:00 2001 From: Jim Grosbach Date: Fri, 9 Sep 2011 18:37:27 +0000 Subject: Thumb2 assembly parsing and encoding for LDREX/LDREXB/LDREXD/LDREXH. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139381 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/ARM/AsmParser/ARMAsmParser.cpp | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'lib/Target/ARM/AsmParser/ARMAsmParser.cpp') diff --git a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp index afab484a17..b994d0fa75 100644 --- a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp +++ b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp @@ -756,6 +756,14 @@ public: int64_t Val = Mem.OffsetImm->getValue(); return Val >= -1020 && Val <= 1020 && (Val & 3) == 0; } + bool isMemImm0_1020s4Offset() const { + if (Kind != Memory || Mem.OffsetRegNum != 0) + return false; + // Immediate offset a multiple of 4 in range [0, 1020]. + if (!Mem.OffsetImm) return true; + int64_t Val = Mem.OffsetImm->getValue(); + return Val >= 0 && Val <= 1020 && (Val & 3) == 0; + } bool isMemImm8Offset() const { if (Kind != Memory || Mem.OffsetRegNum != 0) return false; @@ -1146,6 +1154,14 @@ public: Inst.addOperand(MCOperand::CreateImm(Val)); } + void addMemImm0_1020s4OffsetOperands(MCInst &Inst, unsigned N) const { + assert(N == 2 && "Invalid number of operands!"); + // The lower two bits are always zero and as such are not encoded. + int32_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() / 4 : 0; + Inst.addOperand(MCOperand::CreateReg(Mem.BaseRegNum)); + Inst.addOperand(MCOperand::CreateImm(Val)); + } + void addMemImm8OffsetOperands(MCInst &Inst, unsigned N) const { assert(N == 2 && "Invalid number of operands!"); int64_t Val = Mem.OffsetImm ? Mem.OffsetImm->getValue() : 0; -- cgit v1.2.3-70-g09d2