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 EVT type is used by tablegen as well as in LLVM. In order to handle
  11 // extended types, the EVT 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 <map>
  19 #include <vector>
  20 using namespace llvm;
  21
  22 namespace llvm {
  23
  24 class Type {
  25 public:
  26   virtual unsigned getSizeInBits() const = 0;
  27   virtual ~Type() {}
  28 };
  29
  30 }
  31
  32 class ExtendedIntegerType : public Type {
  33   unsigned BitWidth;
  34 public:
  35   explicit ExtendedIntegerType(unsigned bits)
  36     : BitWidth(bits) {}
  37   unsigned getSizeInBits() const {
  38     return getBitWidth();
  39   }
  40   unsigned getBitWidth() const {
  41     return BitWidth;
  42   }
  43 };
  44
  45 class ExtendedVectorType : public Type {
  46   EVT ElementType;
  47   unsigned NumElements;
  48 public:
  49   ExtendedVectorType(EVT elty, unsigned num)
  50     : ElementType(elty), NumElements(num) {}
  51   unsigned getSizeInBits() const {
  52     return getNumElements() * getElementType().getSizeInBits();
  53   }
  54   EVT getElementType() const {
  55     return ElementType;
  56   }
  57   unsigned getNumElements() const {
  58     return NumElements;
  59   }
  60 };
  61
  62 static std::map<unsigned, const Type *>
  63   ExtendedIntegerTypeMap;
  64 static std::map<std::pair<uintptr_t, uintptr_t>, const Type *>
  65   ExtendedVectorTypeMap;
  66
  67 bool EVT::isExtendedFloatingPoint() const {
  68   assert(isExtended() && "Type is not extended!");
  69   // Extended floating-point types are not supported yet.
  70   return false;
  71 }
  72
  73 bool EVT::isExtendedInteger() const {
  74   assert(isExtended() && "Type is not extended!");
  75   return dynamic_cast<const ExtendedIntegerType *>(LLVMTy) != 0;
  76 }
  77
  78 bool EVT::isExtendedVector() const {
  79   assert(isExtended() && "Type is not extended!");
  80   return dynamic_cast<const ExtendedVectorType *>(LLVMTy) != 0;
  81 }
  82
  83 bool EVT::isExtended64BitVector() const {
  84   assert(isExtended() && "Type is not extended!");
  85   return isExtendedVector() && getSizeInBits() == 64;
  86 }
  87
  88 bool EVT::isExtended128BitVector() const {
  89   assert(isExtended() && "Type is not extended!");
  90   return isExtendedVector() && getSizeInBits() == 128;
  91 }
  92
  93 EVT EVT::getExtendedVectorElementType() const {
  94   assert(isExtendedVector() && "Type is not an extended vector!");
  95   return static_cast<const ExtendedVectorType *>(LLVMTy)->getElementType();
  96 }
  97
  98 unsigned EVT::getExtendedVectorNumElements() const {
  99   assert(isExtendedVector() && "Type is not an extended vector!");
 100   return static_cast<const ExtendedVectorType *>(LLVMTy)->getNumElements();
 101 }
 102
 103 unsigned EVT::getExtendedSizeInBits() const {
 104   assert(isExtended() && "Type is not extended!");
 105   return LLVMTy->getSizeInBits();
 106 }