utils/TableGen/TGValueTypes.cpp

   1 //===- ValueTypes.cpp - Tablegen extended ValueType implementation --------===//
   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 // The MVT type is used by tablegen as well as in LLVM. In order to handle
  11 // extended types, the MVT type uses support functions that call into
  12 // LLVM's type system code. These aren't accessible in tablegen, so this
  13 // file provides simple replacements.
  14 //
  15 //===----------------------------------------------------------------------===//
  16
  17 #include "llvm/CodeGen/ValueTypes.h"
  18 #include "llvm/Support/Streams.h"
  19 #include <map>
  20 #include <vector>
  21 using namespace llvm;
  22
  23 namespace llvm {
  24
  25 class Type {
  26 public:
  27   virtual unsigned getSizeInBits() const = 0;
  28   virtual ~Type() {}
  29 };
  30
  31 }
  32
  33 class ExtendedIntegerType : public Type {
  34   unsigned BitWidth;
  35 public:
  36   explicit ExtendedIntegerType(unsigned bits)
  37     : BitWidth(bits) {}
  38   unsigned getSizeInBits() const {
  39     return getBitWidth();
  40   }
  41   unsigned getBitWidth() const {
  42     return BitWidth;
  43   }
  44 };
  45
  46 class ExtendedVectorType : public Type {
  47   MVT ElementType;
  48   unsigned NumElements;
  49 public:
  50   ExtendedVectorType(MVT elty, unsigned num)
  51     : ElementType(elty), NumElements(num) {}
  52   unsigned getSizeInBits() const {
  53     return getNumElements() * getElementType().getSizeInBits();
  54   }
  55   MVT getElementType() const {
  56     return ElementType;
  57   }
  58   unsigned getNumElements() const {
  59     return NumElements;
  60   }
  61 };
  62
  63 static std::map<unsigned, const Type *>
  64   ExtendedIntegerTypeMap;
  65 static std::map<std::pair<uintptr_t, uintptr_t>, const Type *>
  66   ExtendedVectorTypeMap;
  67
  68 MVT MVT::getExtendedIntegerVT(unsigned BitWidth) {
  69   const Type *&ET = ExtendedIntegerTypeMap[BitWidth];
  70   if (!ET) ET = new ExtendedIntegerType(BitWidth);
  71   MVT VT;
  72   VT.LLVMTy = ET;
  73   assert(VT.isExtended() && "Type is not extended!");
  74   return VT;
  75 }
  76
  77 MVT MVT::getExtendedVectorVT(MVT VT, unsigned NumElements) {
  78   const Type *&ET = ExtendedVectorTypeMap[std::make_pair(VT.getRawBits(),
  79                                                          NumElements)];
  80   if (!ET) ET = new ExtendedVectorType(VT, NumElements);
  81   MVT ResultVT;
  82   ResultVT.LLVMTy = ET;
  83   assert(ResultVT.isExtended() && "Type is not extended!");
  84   return ResultVT;
  85 }
  86
  87 bool MVT::isExtendedFloatingPoint() const {
  88   assert(isExtended() && "Type is not extended!");
  89   // Extended floating-point types are not supported yet.
  90   return false;
  91 }
  92
  93 bool MVT::isExtendedInteger() const {
  94   assert(isExtended() && "Type is not extended!");
  95   return dynamic_cast<const ExtendedIntegerType *>(LLVMTy) != 0;
  96 }
  97
  98 bool MVT::isExtendedVector() const {
  99   assert(isExtended() && "Type is not extended!");
 100   return dynamic_cast<const ExtendedVectorType *>(LLVMTy) != 0;
 101 }
 102
 103 bool MVT::isExtended64BitVector() const {
 104   assert(isExtended() && "Type is not extended!");
 105   return isExtendedVector() && getSizeInBits() == 64;
 106 }
 107
 108 bool MVT::isExtended128BitVector() const {
 109   assert(isExtended() && "Type is not extended!");
 110   return isExtendedVector() && getSizeInBits() == 128;
 111 }
 112
 113 MVT MVT::getExtendedVectorElementType() const {
 114   assert(isExtendedVector() && "Type is not an extended vector!");
 115   return static_cast<const ExtendedVectorType *>(LLVMTy)->getElementType();
 116 }
 117
 118 unsigned MVT::getExtendedVectorNumElements() const {
 119   assert(isExtendedVector() && "Type is not an extended vector!");
 120   return static_cast<const ExtendedVectorType *>(LLVMTy)->getNumElements();
 121 }
 122
 123 unsigned MVT::getExtendedSizeInBits() const {
 124   assert(isExtended() && "Type is not extended!");
 125   return LLVMTy->getSizeInBits();
 126 }