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1 //===- MipsSubtarget.cpp - Mips Subtarget Information -----------*- C++ -*-===//
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 Mips specific subclass of TargetSubtargetInfo.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "MipsSubtarget.h"
15 #include "Mips.h"
16 #include "llvm/Support/TargetRegistry.h"
17 
18 #define GET_SUBTARGETINFO_TARGET_DESC
19 #define GET_SUBTARGETINFO_CTOR
20 #include "MipsGenSubtargetInfo.inc"
21 
22 using namespace llvm;
23 
MipsSubtarget(const std::string & TT,const std::string & CPU,const std::string & FS,bool little)24 MipsSubtarget::MipsSubtarget(const std::string &TT, const std::string &CPU,
25                              const std::string &FS, bool little) :
26   MipsGenSubtargetInfo(TT, CPU, FS),
27   MipsArchVersion(Mips32), MipsABI(UnknownABI), IsLittle(little),
28   IsSingleFloat(false), IsFP64bit(false), IsGP64bit(false), HasVFPU(false),
29   IsLinux(true), HasSEInReg(false), HasCondMov(false), HasMulDivAdd(false),
30   HasMinMax(false), HasSwap(false), HasBitCount(false)
31 {
32   std::string CPUName = CPU;
33   if (CPUName.empty())
34     CPUName = "mips32r1";
35 
36   // Parse features string.
37   ParseSubtargetFeatures(CPUName, FS);
38 
39   // Initialize scheduling itinerary for the specified CPU.
40   InstrItins = getInstrItineraryForCPU(CPUName);
41 
42   // Set MipsABI if it hasn't been set yet.
43   if (MipsABI == UnknownABI)
44     MipsABI = hasMips64() ? N64 : O32;
45 
46   // Check if Architecture and ABI are compatible.
47   assert(((!hasMips64() && (isABI_O32() || isABI_EABI())) ||
48           (hasMips64() && (isABI_N32() || isABI_N64()))) &&
49          "Invalid  Arch & ABI pair.");
50 
51   // Is the target system Linux ?
52   if (TT.find("linux") == std::string::npos)
53     IsLinux = false;
54 }
55