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Add ability to select hw multiplier mode and select appropriate libcalls. 

llvm-svn: 90737
This commit is contained in:
Anton Korobeynikov 2009-12-07 02:27:08 +00:00
parent 0f3a228e73
commit 28d3c733aa
1 changed files with 29 additions and 0 deletions
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29
llvm/lib/Target/MSP430/MSP430ISelLowering.cpp
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@ -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) {