ARM assembly parsing for LSR/LSL/ROR(immediate).
More of rdar://9704684
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144301 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
index e68ecec..83e7aac 100644
--- a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
+++ b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
@@ -602,6 +602,14 @@
int64_t Value = CE->getValue();
return Value > 0 && Value < 33;
}
+ bool isImm0_32() const {
+ if (Kind != k_Immediate)
+ return false;
+ const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
+ if (!CE) return false;
+ int64_t Value = CE->getValue();
+ return Value >= 0 && Value < 33;
+ }
bool isImm0_65535() const {
if (Kind != k_Immediate)
return false;
@@ -1217,6 +1225,11 @@
Inst.addOperand(MCOperand::CreateImm(CE->getValue() - 1));
}
+ void addImm0_32Operands(MCInst &Inst, unsigned N) const {
+ assert(N == 1 && "Invalid number of operands!");
+ addExpr(Inst, getImm());
+ }
+
void addImm0_65535Operands(MCInst &Inst, unsigned N) const {
assert(N == 1 && "Invalid number of operands!");
addExpr(Inst, getImm());
@@ -4542,14 +4555,28 @@
const SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
switch (Inst.getOpcode()) {
// Handle the MOV complex aliases.
- case ARM::ASRi: {
- unsigned Amt = Inst.getOperand(2).getImm() + 1;
- unsigned ShiftOp = ARM_AM::getSORegOpc(ARM_AM::asr, Amt);
+ case ARM::ASRi:
+ case ARM::LSRi:
+ case ARM::LSLi:
+ case ARM::RORi: {
+ ARM_AM::ShiftOpc ShiftTy;
+ unsigned Amt = Inst.getOperand(2).getImm();
+ switch(Inst.getOpcode()) {
+ default: llvm_unreachable("unexpected opcode!");
+ case ARM::ASRi: ShiftTy = ARM_AM::asr; break;
+ case ARM::LSRi: ShiftTy = ARM_AM::lsr; break;
+ case ARM::LSLi: ShiftTy = ARM_AM::lsl; break;
+ case ARM::RORi: ShiftTy = ARM_AM::ror; break;
+ }
+ // A shift by zero is a plain MOVr, not a MOVsi.
+ unsigned Opc = Amt == 0 ? ARM::MOVr : ARM::MOVsi;
+ unsigned Shifter = ARM_AM::getSORegOpc(ShiftTy, Amt);
MCInst TmpInst;
- TmpInst.setOpcode(ARM::MOVsi);
+ TmpInst.setOpcode(Opc);
TmpInst.addOperand(Inst.getOperand(0)); // Rd
TmpInst.addOperand(Inst.getOperand(1)); // Rn
- TmpInst.addOperand(MCOperand::CreateImm(ShiftOp)); // Shift value and ty
+ if (Opc == ARM::MOVsi)
+ TmpInst.addOperand(MCOperand::CreateImm(Shifter)); // Shift value and ty
TmpInst.addOperand(Inst.getOperand(3)); // CondCode
TmpInst.addOperand(Inst.getOperand(4));
TmpInst.addOperand(Inst.getOperand(5)); // cc_out