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