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