1 //===-- SPUSubtarget.h - Define Subtarget for the Cell SPU ------*- 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 declares the Cell SPU-specific subclass of TargetSubtargetInfo. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef CELLSUBTARGET_H 15 #define CELLSUBTARGET_H 16 17 #include "llvm/Target/TargetSubtargetInfo.h" 18 #include "llvm/MC/MCInstrItineraries.h" 19 #include <string> 20 21 #define GET_SUBTARGETINFO_HEADER 22 #include "SPUGenSubtargetInfo.inc" 23 24 namespace llvm { 25 class GlobalValue; 26 class StringRef; 27 28 namespace SPU { 29 enum { 30 PROC_NONE, 31 DEFAULT_PROC 32 }; 33 } 34 35 class SPUSubtarget : public SPUGenSubtargetInfo { 36 protected: 37 /// stackAlignment - The minimum alignment known to hold of the stack frame 38 /// on entry to the function and which must be maintained by every function. 39 unsigned StackAlignment; 40 41 /// Selected instruction itineraries (one entry per itinerary class.) 42 InstrItineraryData InstrItins; 43 44 /// Which SPU processor (this isn't really used, but it's there to keep 45 /// the C compiler happy) 46 unsigned ProcDirective; 47 48 /// Use (assume) large memory -- effectively disables the LQA/STQA 49 /// instructions that assume 259K local store. 50 bool UseLargeMem; 51 52 public: 53 /// This constructor initializes the data members to match that 54 /// of the specified triple. 55 /// 56 SPUSubtarget(const std::string &TT, const std::string &CPU, 57 const std::string &FS); 58 59 /// ParseSubtargetFeatures - Parses features string setting specified 60 /// subtarget options. Definition of function is auto generated by tblgen. 61 void ParseSubtargetFeatures(StringRef CPU, StringRef FS); 62 63 /// SetJITMode - This is called to inform the subtarget info that we are 64 /// producing code for the JIT. 65 void SetJITMode(); 66 67 /// getStackAlignment - Returns the minimum alignment known to hold of the 68 /// stack frame on entry to the function and which must be maintained by 69 /// every function for this subtarget. 70 unsigned getStackAlignment() const { return StackAlignment; } 71 72 /// getInstrItins - Return the instruction itineraies based on subtarget 73 /// selection. 74 const InstrItineraryData &getInstrItineraryData() const { 75 return InstrItins; 76 } 77 78 /// Use large memory addressing predicate 79 bool usingLargeMem() const { 80 return UseLargeMem; 81 } 82 83 /// getTargetDataString - Return the pointer size and type alignment 84 /// properties of this subtarget. 85 const char *getTargetDataString() const { 86 return "E-p:32:32:128-f64:64:128-f32:32:128-i64:32:128-i32:32:128" 87 "-i16:16:128-i8:8:128-i1:8:128-a:0:128-v64:64:128-v128:128:128" 88 "-s:128:128-n32:64"; 89 } 90 91 bool enablePostRAScheduler(CodeGenOpt::Level OptLevel, 92 TargetSubtargetInfo::AntiDepBreakMode& Mode, 93 RegClassVector& CriticalPathRCs) const; 94 }; 95 } // End llvm namespace 96 97 #endif 98
