[llvm-commits] [llvm] r59314 - in /llvm/trunk/lib/Target/ARM: ARMCodeEmitter.cpp ARMInstrInfo.td
Evan Cheng
evan.cheng at apple.com
Fri Nov 14 12:09:11 PST 2008
Author: evancheng
Date: Fri Nov 14 14:09:11 2008
New Revision: 59314
URL: http://llvm.org/viewvc/llvm-project?rev=59314&view=rev
Log:
Fix MOVrx, MOVsrl_flag, and MOVsra_flag encodings.
Modified:
llvm/trunk/lib/Target/ARM/ARMCodeEmitter.cpp
llvm/trunk/lib/Target/ARM/ARMInstrInfo.td
Modified: llvm/trunk/lib/Target/ARM/ARMCodeEmitter.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMCodeEmitter.cpp?rev=59314&r1=59313&r2=59314&view=diff
==============================================================================
--- llvm/trunk/lib/Target/ARM/ARMCodeEmitter.cpp (original)
+++ llvm/trunk/lib/Target/ARM/ARMCodeEmitter.cpp Fri Nov 14 14:09:11 2008
@@ -83,6 +83,8 @@
void emitLEApcrelJTInstruction(const MachineInstr &MI);
+ void emitPseudoMoveInstruction(const MachineInstr &MI);
+
void addPCLabel(unsigned LabelID);
void emitPseudoInstruction(const MachineInstr &MI);
@@ -499,6 +501,45 @@
emitWordLE(Binary);
}
+void ARMCodeEmitter::emitPseudoMoveInstruction(const MachineInstr &MI) {
+ unsigned Opcode = MI.getDesc().Opcode;
+
+ // Part of binary is determined by TableGn.
+ unsigned Binary = getBinaryCodeForInstr(MI);
+
+ // Set the conditional execution predicate
+ Binary |= II->getPredicate(&MI) << ARMII::CondShift;
+
+ // Encode S bit if MI modifies CPSR.
+ if (Opcode == ARM::MOVsrl_flag || Opcode == ARM::MOVsra_flag)
+ Binary |= 1 << ARMII::S_BitShift;
+
+ // Encode register def if there is one.
+ Binary |= getMachineOpValue(MI, 0) << ARMII::RegRdShift;
+
+ // Encode the shift operation.
+ switch (Opcode) {
+ default: break;
+ case ARM::MOVrx:
+ // rrx
+ Binary |= 0x6 << 4;
+ break;
+ case ARM::MOVsrl_flag:
+ // lsr #1
+ Binary |= (0x2 << 4) | (1 << 7);
+ break;
+ case ARM::MOVsra_flag:
+ // asr #1
+ Binary |= (0x4 << 4) | (1 << 7);
+ break;
+ }
+
+ // Encode register Rm.
+ Binary |= getMachineOpValue(MI, 1);
+
+ emitWordLE(Binary);
+}
+
void ARMCodeEmitter::addPCLabel(unsigned LabelID) {
DOUT << " ** LPC" << LabelID << " @ "
<< (void*)MCE.getCurrentPCValue() << '\n';
@@ -564,6 +605,11 @@
// Materialize jumptable address.
emitLEApcrelJTInstruction(MI);
break;
+ case ARM::MOVrx:
+ case ARM::MOVsrl_flag:
+ case ARM::MOVsra_flag:
+ emitPseudoMoveInstruction(MI);
+ break;
}
}
@@ -638,7 +684,9 @@
unsigned ARMCodeEmitter::getAddrModeSBit(const MachineInstr &MI,
const TargetInstrDesc &TID) const {
- for (unsigned i = MI.getNumOperands(), e = TID.getNumOperands(); i != e; --i){
+ unsigned e = TID.getNumOperands();
+ if (e) --e; // Looks at the last non-implicit operand as well.
+ for (unsigned i = MI.getNumOperands(); i != e; --i) {
const MachineOperand &MO = MI.getOperand(i-1);
if (MO.isReg() && MO.isDef() && MO.getReg() == ARM::CPSR)
return 1 << ARMII::S_BitShift;
Modified: llvm/trunk/lib/Target/ARM/ARMInstrInfo.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMInstrInfo.td?rev=59314&r1=59313&r2=59314&view=diff
==============================================================================
--- llvm/trunk/lib/Target/ARM/ARMInstrInfo.td (original)
+++ llvm/trunk/lib/Target/ARM/ARMInstrInfo.td Fri Nov 14 14:09:11 2008
@@ -777,7 +777,7 @@
def MOVi : AsI1<0b1101, (outs GPR:$dst), (ins so_imm:$src), DPFrm,
"mov", " $dst, $src", [(set GPR:$dst, so_imm:$src)]>, UnaryDP;
-def MOVrx : AsI1<0b1101, (outs GPR:$dst), (ins GPR:$src), DPFrm,
+def MOVrx : AsI1<0b1101, (outs GPR:$dst), (ins GPR:$src), Pseudo,
"mov", " $dst, $src, rrx",
[(set GPR:$dst, (ARMrrx GPR:$src))]>, UnaryDP;
@@ -785,10 +785,10 @@
// due to flag operands.
let Defs = [CPSR] in {
-def MOVsrl_flag : AI1<0b1101, (outs GPR:$dst), (ins GPR:$src), DPFrm,
+def MOVsrl_flag : AI1<0b1101, (outs GPR:$dst), (ins GPR:$src), Pseudo,
"mov", "s $dst, $src, lsr #1",
[(set GPR:$dst, (ARMsrl_flag GPR:$src))]>, UnaryDP;
-def MOVsra_flag : AI1<0b1101, (outs GPR:$dst), (ins GPR:$src), DPFrm,
+def MOVsra_flag : AI1<0b1101, (outs GPR:$dst), (ins GPR:$src), Pseudo,
"mov", "s $dst, $src, asr #1",
[(set GPR:$dst, (ARMsra_flag GPR:$src))]>, UnaryDP;
}
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