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) {}
63