contrib/llvm/lib/Target/MSP430/MSP430Subtarget.cpp

   1 //===-- MSP430Subtarget.cpp - MSP430 Subtarget Information ----------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file implements the MSP430 specific subclass of TargetSubtargetInfo.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "MSP430Subtarget.h"
  15 #include "MSP430.h"
  16 #include "llvm/Support/TargetRegistry.h"
  17
  18 using namespace llvm;
  19
  20 #define DEBUG_TYPE "msp430-subtarget"
  21
  22 static cl::opt<MSP430Subtarget::HWMultEnum>
  23 HWMultModeOption("mhwmult", cl::Hidden,
  24            cl::desc("Hardware multiplier use mode for MSP430"),
  25            cl::init(MSP430Subtarget::NoHWMult),
  26            cl::values(
  27              clEnumValN(MSP430Subtarget::NoHWMult, "none",
  28                 "Do not use hardware multiplier"),
  29              clEnumValN(MSP430Subtarget::HWMult16, "16bit",
  30                 "Use 16-bit hardware multiplier"),
  31              clEnumValN(MSP430Subtarget::HWMult32, "32bit",
  32                 "Use 32-bit hardware multiplier"),
  33              clEnumValN(MSP430Subtarget::HWMultF5, "f5series",
  34                 "Use F5 series hardware multiplier")));
  35
  36 #define GET_SUBTARGETINFO_TARGET_DESC
  37 #define GET_SUBTARGETINFO_CTOR
  38 #include "MSP430GenSubtargetInfo.inc"
  39
  40 void MSP430Subtarget::anchor() { }
  41
  42 MSP430Subtarget &
  43 MSP430Subtarget::initializeSubtargetDependencies(StringRef CPU, StringRef FS) {
  44   ExtendedInsts = false;
  45   HWMultMode = NoHWMult;
  46
  47   std::string CPUName = CPU;
  48   if (CPUName.empty())
  49     CPUName = "msp430";
  50
  51   ParseSubtargetFeatures(CPUName, FS);
  52
  53   if (HWMultModeOption != NoHWMult)
  54     HWMultMode = HWMultModeOption;
  55
  56   return *this;
  57 }
  58
  59 MSP430Subtarget::MSP430Subtarget(const Triple &TT, const std::string &CPU,
  60                                  const std::string &FS, const TargetMachine &TM)
  61     : MSP430GenSubtargetInfo(TT, CPU, FS), FrameLowering(),
  62       InstrInfo(initializeSubtargetDependencies(CPU, FS)), TLInfo(TM, *this) {}