lib/Target/CellSPU/SPUSubtarget.h

   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