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