lib/Target/MSP430/MSP430Subtarget.cpp

   1 //===-- MSP430Subtarget.cpp - MSP430 Subtarget Information ----------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // This file implements the MSP430 specific subclass of TargetSubtargetInfo.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #include "MSP430Subtarget.h"
  14 #include "MSP430.h"
  15 #include "llvm/Support/TargetRegistry.h"
  16
  17 using namespace llvm;
  18
  19 #define DEBUG_TYPE "msp430-subtarget"
  20
  21 static cl::opt<MSP430Subtarget::HWMultEnum>
  22 HWMultModeOption("mhwmult", cl::Hidden,
  23            cl::desc("Hardware multiplier use mode for MSP430"),
  24            cl::init(MSP430Subtarget::NoHWMult),
  25            cl::values(
  26              clEnumValN(MSP430Subtarget::NoHWMult, "none",
  27                 "Do not use hardware multiplier"),
  28              clEnumValN(MSP430Subtarget::HWMult16, "16bit",
  29                 "Use 16-bit hardware multiplier"),
  30              clEnumValN(MSP430Subtarget::HWMult32, "32bit",
  31                 "Use 32-bit hardware multiplier"),
  32              clEnumValN(MSP430Subtarget::HWMultF5, "f5series",
  33                 "Use F5 series hardware multiplier")));
  34
  35 #define GET_SUBTARGETINFO_TARGET_DESC
  36 #define GET_SUBTARGETINFO_CTOR
  37 #include "MSP430GenSubtargetInfo.inc"
  38
  39 void MSP430Subtarget::anchor() { }
  40
  41 MSP430Subtarget &
  42 MSP430Subtarget::initializeSubtargetDependencies(StringRef CPU, StringRef FS) {
  43   ExtendedInsts = false;
  44   HWMultMode = NoHWMult;
  45
  46   std::string CPUName = CPU;
  47   if (CPUName.empty())
  48     CPUName = "msp430";
  49
  50   ParseSubtargetFeatures(CPUName, FS);
  51
  52   if (HWMultModeOption != NoHWMult)
  53     HWMultMode = HWMultModeOption;
  54
  55   return *this;
  56 }
  57
  58 MSP430Subtarget::MSP430Subtarget(const Triple &TT, const std::string &CPU,
  59                                  const std::string &FS, const TargetMachine &TM)
  60     : MSP430GenSubtargetInfo(TT, CPU, FS), FrameLowering(),
  61       InstrInfo(initializeSubtargetDependencies(CPU, FS)), TLInfo(TM, *this) {}