kc3-lang/angle/src/compiler/translator/ConstantUnion.h

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• Author : Jamie Madill
  Date : 2015-05-04 14:21:21
  Hash : 6ba6eadc
  Message : Rename ConstantUnion to TConstantUnion. This clarified that we're using the Pool allocator/deallocator for this type. BUG=angleproject:993 Change-Id: If8c95f6054d07291e7014be0d4e35766ba2e943b Reviewed-on: https://chromium-review.googlesource.com/269131 Tested-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Kenneth Russell <kbr@chromium.org> Reviewed-by: Zhenyao Mo <zmo@chromium.org>

• src/compiler/translator/ConstantUnion.h

• //
  // Copyright (c) 2002-2014 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  
  #ifndef COMPILER_TRANSLATOR_CONSTANTUNION_H_
  #define COMPILER_TRANSLATOR_CONSTANTUNION_H_
  
  #include <assert.h>
  
  #include "compiler/translator/BaseTypes.h"
  
  class TConstantUnion {
  public:
      POOL_ALLOCATOR_NEW_DELETE();
      TConstantUnion()
      {
          iConst = 0;
          type = EbtVoid;
      }
  
      bool cast(TBasicType newType, const TConstantUnion &constant)
      {
          switch (newType)
          {
            case EbtFloat:
              switch (constant.type)
              {
                case EbtInt:   setFConst(static_cast<float>(constant.getIConst())); break;
                case EbtUInt:  setFConst(static_cast<float>(constant.getUConst())); break;
                case EbtBool:  setFConst(static_cast<float>(constant.getBConst())); break;
                case EbtFloat: setFConst(static_cast<float>(constant.getFConst())); break;
                default:       return false;
              }
              break;
            case EbtInt:
              switch (constant.type)
              {
                case EbtInt:   setIConst(static_cast<int>(constant.getIConst())); break;
                case EbtUInt:  setIConst(static_cast<int>(constant.getUConst())); break;
                case EbtBool:  setIConst(static_cast<int>(constant.getBConst())); break;
                case EbtFloat: setIConst(static_cast<int>(constant.getFConst())); break;
                default:       return false;
              }
              break;
            case EbtUInt:
              switch (constant.type)
              {
                case EbtInt:   setUConst(static_cast<unsigned int>(constant.getIConst())); break;
                case EbtUInt:  setUConst(static_cast<unsigned int>(constant.getUConst())); break;
                case EbtBool:  setUConst(static_cast<unsigned int>(constant.getBConst())); break;
                case EbtFloat: setUConst(static_cast<unsigned int>(constant.getFConst())); break;
                default:       return false;
              }
              break;
            case EbtBool:
              switch (constant.type)
              {
                case EbtInt:   setBConst(constant.getIConst() != 0);    break;
                case EbtUInt:  setBConst(constant.getUConst() != 0);    break;
                case EbtBool:  setBConst(constant.getBConst());         break;
                case EbtFloat: setBConst(constant.getFConst() != 0.0f); break;
                default:       return false;
              }
              break;
            case EbtStruct:    // Struct fields don't get cast
              switch (constant.type)
              {
                case EbtInt:   setIConst(constant.getIConst()); break;
                case EbtUInt:  setUConst(constant.getUConst()); break;
                case EbtBool:  setBConst(constant.getBConst()); break;
                case EbtFloat: setFConst(constant.getFConst()); break;
                default:       return false;
              }
              break;
            default:
              return false;
          }
  
          return true;
      }
  
      void setIConst(int i) {iConst = i; type = EbtInt; }
      void setUConst(unsigned int u) { uConst = u; type = EbtUInt; }
      void setFConst(float f) {fConst = f; type = EbtFloat; }
      void setBConst(bool b) {bConst = b; type = EbtBool; }
  
      int getIConst() const { return iConst; }
      unsigned int getUConst() const { return uConst; }
      float getFConst() const { return fConst; }
      bool getBConst() const { return bConst; }
  
      bool operator==(const int i) const
      {
          return i == iConst;
      }
  
      bool operator==(const unsigned int u) const
      {
          return u == uConst;
      }
  
      bool operator==(const float f) const
      {
          return f == fConst;
      }
  
      bool operator==(const bool b) const
      {
          return b == bConst;
      }
  
      bool operator==(const TConstantUnion& constant) const
      {
          if (constant.type != type)
              return false;
  
          switch (type) {
          case EbtInt:
              return constant.iConst == iConst;
          case EbtUInt:
              return constant.uConst == uConst;
          case EbtFloat:
              return constant.fConst == fConst;
          case EbtBool:
              return constant.bConst == bConst;
          default:
              return false;
          }
      }
  
      bool operator!=(const int i) const
      {
          return !operator==(i);
      }
  
      bool operator!=(const unsigned int u) const
      {
          return !operator==(u);
      }
  
      bool operator!=(const float f) const
      {
          return !operator==(f);
      }
  
      bool operator!=(const bool b) const
      {
          return !operator==(b);
      }
  
      bool operator!=(const TConstantUnion& constant) const
      {
          return !operator==(constant);
      }
  
      bool operator>(const TConstantUnion& constant) const
      { 
          assert(type == constant.type);
          switch (type) {
          case EbtInt:
              return iConst > constant.iConst;
          case EbtUInt:
              return uConst > constant.uConst;
          case EbtFloat:
              return fConst > constant.fConst;
          default:
              return false;   // Invalid operation, handled at semantic analysis
          }
      }
  
      bool operator<(const TConstantUnion& constant) const
      { 
          assert(type == constant.type);
          switch (type) {
          case EbtInt:
              return iConst < constant.iConst;
          case EbtUInt:
              return uConst < constant.uConst;
          case EbtFloat:
              return fConst < constant.fConst;
          default:
              return false;   // Invalid operation, handled at semantic analysis
          }
      }
  
      TConstantUnion operator+(const TConstantUnion& constant) const
      { 
          TConstantUnion returnValue;
          assert(type == constant.type);
          switch (type) {
          case EbtInt: returnValue.setIConst(iConst + constant.iConst); break;
          case EbtUInt: returnValue.setUConst(uConst + constant.uConst); break;
          case EbtFloat: returnValue.setFConst(fConst + constant.fConst); break;
          default: assert(false && "Default missing");
          }
  
          return returnValue;
      }
  
      TConstantUnion operator-(const TConstantUnion& constant) const
      { 
          TConstantUnion returnValue;
          assert(type == constant.type);
          switch (type) {
          case EbtInt: returnValue.setIConst(iConst - constant.iConst); break;
          case EbtUInt: returnValue.setUConst(uConst - constant.uConst); break;
          case EbtFloat: returnValue.setFConst(fConst - constant.fConst); break;
          default: assert(false && "Default missing");
          }
  
          return returnValue;
      }
  
      TConstantUnion operator*(const TConstantUnion& constant) const
      { 
          TConstantUnion returnValue;
          assert(type == constant.type);
          switch (type) {
          case EbtInt: returnValue.setIConst(iConst * constant.iConst); break;
          case EbtUInt: returnValue.setUConst(uConst * constant.uConst); break;
          case EbtFloat: returnValue.setFConst(fConst * constant.fConst); break; 
          default: assert(false && "Default missing");
          }
  
          return returnValue;
      }
  
      TConstantUnion operator%(const TConstantUnion& constant) const
      { 
          TConstantUnion returnValue;
          assert(type == constant.type);
          switch (type) {
          case EbtInt: returnValue.setIConst(iConst % constant.iConst); break;
          case EbtUInt: returnValue.setUConst(uConst % constant.uConst); break;
          default:     assert(false && "Default missing");
          }
  
          return returnValue;
      }
  
      TConstantUnion operator>>(const TConstantUnion& constant) const
      { 
          TConstantUnion returnValue;
          assert(type == constant.type);
          switch (type) {
          case EbtInt: returnValue.setIConst(iConst >> constant.iConst); break;
          case EbtUInt: returnValue.setUConst(uConst >> constant.uConst); break;
          default:     assert(false && "Default missing");
          }
  
          return returnValue;
      }
  
      TConstantUnion operator<<(const TConstantUnion& constant) const
      { 
          TConstantUnion returnValue;
          // The signedness of the second parameter might be different, but we
          // don't care, since the result is undefined if the second parameter is
          // negative, and aliasing should not be a problem with unions.
          assert(constant.type == EbtInt || constant.type == EbtUInt);
          switch (type) {
          case EbtInt: returnValue.setIConst(iConst << constant.iConst); break;
          case EbtUInt: returnValue.setUConst(uConst << constant.uConst); break;
          default:     assert(false && "Default missing");
          }
  
          return returnValue;
      }
  
      TConstantUnion operator&(const TConstantUnion& constant) const
      { 
          TConstantUnion returnValue;
          assert(constant.type == EbtInt || constant.type == EbtUInt);
          switch (type) {
          case EbtInt:  returnValue.setIConst(iConst & constant.iConst); break;
          case EbtUInt:  returnValue.setUConst(uConst & constant.uConst); break;
          default:     assert(false && "Default missing");
          }
  
          return returnValue;
      }
  
      TConstantUnion operator|(const TConstantUnion& constant) const
      { 
          TConstantUnion returnValue;
          assert(type == constant.type);
          switch (type) {
          case EbtInt:  returnValue.setIConst(iConst | constant.iConst); break;
          case EbtUInt:  returnValue.setUConst(uConst | constant.uConst); break;
          default:     assert(false && "Default missing");
          }
  
          return returnValue;
      }
  
      TConstantUnion operator^(const TConstantUnion& constant) const
      { 
          TConstantUnion returnValue;
          assert(type == constant.type);
          switch (type) {
          case EbtInt:  returnValue.setIConst(iConst ^ constant.iConst); break;
          case EbtUInt:  returnValue.setUConst(uConst ^ constant.uConst); break;
          default:     assert(false && "Default missing");
          }
  
          return returnValue;
      }
  
      TConstantUnion operator&&(const TConstantUnion& constant) const
      { 
          TConstantUnion returnValue;
          assert(type == constant.type);
          switch (type) {
          case EbtBool: returnValue.setBConst(bConst && constant.bConst); break;
          default:     assert(false && "Default missing");
          }
  
          return returnValue;
      }
  
      TConstantUnion operator||(const TConstantUnion& constant) const
      { 
          TConstantUnion returnValue;
          assert(type == constant.type);
          switch (type) {
          case EbtBool: returnValue.setBConst(bConst || constant.bConst); break;
          default:     assert(false && "Default missing");
          }
  
          return returnValue;
      }
  
      TBasicType getType() const { return type; }
  private:
  
      union  {
          int iConst;  // used for ivec, scalar ints
          unsigned int uConst; // used for uvec, scalar uints
          bool bConst; // used for bvec, scalar bools
          float fConst;   // used for vec, mat, scalar floats
      } ;
  
      TBasicType type;
  };
  
  #endif // COMPILER_TRANSLATOR_CONSTANTUNION_H_