diff options
| -rw-r--r-- | lib/Target/MSP430/MSP430ISelLowering.cpp | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/lib/Target/MSP430/MSP430ISelLowering.cpp b/lib/Target/MSP430/MSP430ISelLowering.cpp index 29cc370bef..5c4ccc8f40 100644 --- a/lib/Target/MSP430/MSP430ISelLowering.cpp +++ b/lib/Target/MSP430/MSP430ISelLowering.cpp @@ -32,12 +32,32 @@ #include "llvm/CodeGen/SelectionDAGISel.h" #include "llvm/CodeGen/ValueTypes.h" #include "llvm/Target/TargetLoweringObjectFile.h" +#include "llvm/Support/CommandLine.h" #include "llvm/Support/Debug.h" #include "llvm/Support/ErrorHandling.h" #include "llvm/Support/raw_ostream.h" #include "llvm/ADT/VectorExtras.h" using namespace llvm; +typedef enum { + NoHWMult, + HWMultIntr, + HWMultNoIntr +} HWMultUseMode; + +static cl::opt<HWMultUseMode> +HWMultMode("msp430-hwmult-mode", + cl::desc("Hardware multiplier use mode"), + cl::init(HWMultNoIntr), + cl::values( + clEnumValN(NoHWMult, "no", + "Do not use hardware multiplier"), + clEnumValN(HWMultIntr, "interrupts", + "Assume hardware multiplier can be used inside interrupts"), + clEnumValN(HWMultNoIntr, "use", + "Assume hardware multiplier cannot be used inside interrupts"), + clEnumValEnd)); + MSP430TargetLowering::MSP430TargetLowering(MSP430TargetMachine &tm) : TargetLowering(tm, new TargetLoweringObjectFileELF()), Subtarget(*tm.getSubtargetImpl()), TM(tm) { @@ -142,6 +162,15 @@ MSP430TargetLowering::MSP430TargetLowering(MSP430TargetMachine &tm) : setOperationAction(ISD::SDIV, MVT::i16, Expand); setOperationAction(ISD::SDIVREM, MVT::i16, Expand); setOperationAction(ISD::SREM, MVT::i16, Expand); + + // Libcalls names. + if (HWMultMode == HWMultIntr) { + setLibcallName(RTLIB::MUL_I8, "__mulqi3hw"); + setLibcallName(RTLIB::MUL_I16, "__mulhi3hw"); + } else if (HWMultMode == HWMultNoIntr) { + setLibcallName(RTLIB::MUL_I8, "__mulqi3hw_noint"); + setLibcallName(RTLIB::MUL_I16, "__mulhi3hw_noint"); + } } SDValue MSP430TargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) { |