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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.
getStackAlignment()70     unsigned getStackAlignment() const { return StackAlignment; }
71 
72     /// getInstrItins - Return the instruction itineraies based on subtarget
73     /// selection.
getInstrItineraryData()74     const InstrItineraryData &getInstrItineraryData() const {
75       return InstrItins;
76     }
77 
78     /// Use large memory addressing predicate
usingLargeMem()79     bool usingLargeMem() const {
80       return UseLargeMem;
81     }
82 
83     /// getTargetDataString - Return the pointer size and type alignment
84     /// properties of this subtarget.
getTargetDataString()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