C++ UlamValue::getPtrSlotIndex方法代码示例

  void UnpackedStorage::assignUlamValuePtr(UlamValue pluv, UlamValue puv)
  {
    assert(pluv.getPtrTargetType() == puv.getPtrTargetType());

    s32 leftbaseslot = pluv.getPtrSlotIndex(); //even for scalars
    m_values[leftbaseslot] = puv;
  }

  void UnpackedStorage::assignUlamValue(UlamValue pluv, UlamValue ruv)
  {
    assert(pluv.getUlamValueTypeIdx() == Ptr);
    assert(ruv.getUlamValueTypeIdx() != Ptr);

    s32 leftbaseslot = pluv.getPtrSlotIndex();    //even for scalars

    if(pluv.isTargetPacked() == UNPACKED)
      {
	m_values[leftbaseslot] = ruv;  //must be immediate
      }
    else
      {
	//target is packed or packedloadable, use pos & len in ptr
	UlamValue lvalAtIdx = loadDataMemberAt(leftbaseslot);
	assert(lvalAtIdx.getUlamValueTypeIdx() == UAtom);  //?
	lvalAtIdx.putDataIntoAtom(pluv, ruv, m_state);
	storeDataMemberAt(lvalAtIdx, leftbaseslot);
      }
  }

  void NodeCast::genCodeCastAtomAndElement(File * fp, UlamValue & uvpass)
  {
    UTI nuti = getNodeType();
    UlamType * nut = m_state.getUlamTypeByIndex(nuti);

    UTI vuti = uvpass.getUlamValueTypeIdx();
    s32 tmpVarNum = 0;

    if(vuti == Ptr)
      {
	tmpVarNum = uvpass.getPtrSlotIndex();
	vuti = uvpass.getPtrTargetType();  //replace
      }

    // "downcast" might not be true; compare to be sure the atom is an element "Foo"
    if(vuti == UAtom)
      {
	m_state.indent(fp);
	fp->write("if(!");
	fp->write(nut->getUlamTypeMangledName().c_str());
	fp->write("<EC>::THE_INSTANCE.");
	fp->write(m_state.getIsMangledFunctionName());
	fp->write("(");
	fp->write(m_state.getTmpVarAsString(vuti, tmpVarNum).c_str());
	fp->write("))\n");

	m_state.m_currentIndentLevel++;
	m_state.indent(fp);
	fp->write("FAIL(BAD_CAST);\n");
	m_state.m_currentIndentLevel--;
      }

    //update the uvpass to have the casted type
    uvpass = UlamValue::makePtr(tmpVarNum, uvpass.getPtrStorage(), nuti, m_state.determinePackable(nuti), m_state, 0, uvpass.getPtrNameId()); //POS 0 rightjustified; pass along name id

    return;
  } //genCodeCastAtomAndElement

  void NodeCast::genCodeReadIntoATmpVar(File * fp, UlamValue& uvpass)
  {
    // e.g. called by NodeFunctionCall on a NodeTerminal..
    if(!needsACast())
      {
	return m_node->genCodeReadIntoATmpVar(fp, uvpass);
      }

    UTI nuti = getNodeType();
    UlamType * nut = m_state.getUlamTypeByIndex(nuti);

    UTI vuti = uvpass.getUlamValueTypeIdx();

    bool isTerminal = false;
    s32 tmpVarNum = 0;

   if(vuti == Ptr)
      {
	tmpVarNum = uvpass.getPtrSlotIndex();
	vuti = uvpass.getPtrTargetType(); //replace
      }
    else
      {
	// an immediate terminal value
	isTerminal = true;
      }

   if(nuti == vuti)
     return; //nothing to do!

   UlamType * vut = m_state.getUlamTypeByIndex(vuti); //after vuti replacement
   ULAMCLASSTYPE nclasstype = nut->getUlamClass();
   ULAMCLASSTYPE vclasstype = vut->getUlamClass();

   //handle element-atom and atom-element casting differently:
   // handle element->quark, atom->quark, not quark->element or quark->atom
   if(nuti == UAtom || vuti == UAtom || vclasstype == UC_ELEMENT || vclasstype == UC_QUARK)
     {
       //only to be nclasstype quark makes sense!!! check first, one might be element
       if(nclasstype == UC_QUARK || vclasstype == UC_QUARK)
	 return genCodeCastAtomAndQuark(fp, uvpass);

       if(nclasstype == UC_ELEMENT || vclasstype == UC_ELEMENT)
	 return genCodeCastAtomAndElement(fp, uvpass);

       {
	 std::ostringstream msg;
	 msg << "Casting 'incomplete' types: ";
	 msg << m_state.getUlamTypeNameByIndex(nuti).c_str();
	 msg << "(UTI" << nuti << ") to be " << m_state.getUlamTypeNameByIndex(vuti).c_str();
	 msg << "(UTI" << vuti << ")";
	 MSG(getNodeLocationAsString().c_str(), msg.str().c_str(), DEBUG);
	 return;
       }
     }

   s32 tmpVarCastNum = m_state.getNextTmpVarNumber();

   m_state.indent(fp);
   fp->write("const ");
   fp->write(nut->getTmpStorageTypeAsString().c_str()); //e.g. u32, s32, u64, etc.
   fp->write(" ");
   fp->write(m_state.getTmpVarAsString(nuti, tmpVarCastNum).c_str());
   fp->write(" = ");

   // write the cast method (e.g. _Unsigned32ToInt32, _Int32ToUnary32, etc..)
   fp->write(nut->castMethodForCodeGen(vuti).c_str());
   fp->write("(");

   if(isTerminal)
     {
       s32 len = m_state.getBitSize(vuti);
       assert(len != UNKNOWNSIZE);
       if(len <= MAXBITSPERINT)
	 {
	   u32 data = uvpass.getImmediateData(m_state);
	   char dstr[40];
	   vut->getDataAsString(data, dstr, 'z');
	   fp->write(dstr);
	 }
       else if(len <= MAXBITSPERLONG)
	 {
	   u64 data = uvpass.getImmediateDataLong(m_state);
	   char dstr[70];
	   vut->getDataLongAsString(data, dstr, 'z');
	   fp->write(dstr);
	 }
       else
	 assert(0);
     }
   else
     {
       fp->write(m_state.getTmpVarAsString(nuti, tmpVarNum).c_str());
     }

   fp->write(", ");

   assert(!(nuti == UAtom || vuti == UAtom));
   //LENGTH of node being casted (Uh_AP_mi::LENGTH ?)
   //fp->write(m_state.getBitVectorLengthAsStringForCodeGen(nodetype).c_str());
//.........这里部分代码省略.........

  void NodeBinaryOpEqualBitwise::genCode(File * fp, UlamValue& uvpass)
  {
    assert(m_nodeLeft && m_nodeRight);
    assert(m_state.m_currentObjSymbolsForCodeGen.empty());

#ifdef TMPVARBRACES
    m_state.indent(fp);
    fp->write("{\n");
    m_state.m_currentIndentLevel++;
#endif

    // generate rhs first; may update current object globals (e.g. function call)
    UlamValue ruvpass;
    m_nodeRight->genCode(fp, ruvpass);

    // restore current object globals
    assert(m_state.m_currentObjSymbolsForCodeGen.empty());

    // lhs should be the new current object: node member select updates them,
    // but a plain NodeIdent does not!!!  because genCodeToStoreInto has been repurposed
    // to mean "don't read into a TmpVar" (e.g. by NodeCast).
    UlamValue luvpass;
    m_nodeLeft->genCodeToStoreInto(fp, luvpass); //may update m_currentObjSymbol

    //wiped out by left read; need to write back into left
    std::vector<Symbol *> saveCOSVector = m_state.m_currentObjSymbolsForCodeGen;
    uvpass = luvpass; //keep luvpass slot untouched
    Node::genCodeReadIntoATmpVar(fp, uvpass);
    m_state.m_currentObjSymbolsForCodeGen = saveCOSVector; //restore vector after lhs read*************

    UTI nuti = getNodeType();
    UlamType * nut = m_state.getUlamTypeByIndex(nuti);
    s32 tmpVarNum = m_state.getNextTmpVarNumber();

    m_state.indent(fp);
    fp->write("const ");
    fp->write(nut->getTmpStorageTypeAsString().c_str()); //e.g. u32, s32, u64..
    fp->write(" ");

    fp->write(m_state.getTmpVarAsString(nuti,tmpVarNum).c_str());
    fp->write(" = ");

    fp->write(methodNameForCodeGen().c_str());
    fp->write("(");

    UTI uti = uvpass.getUlamValueTypeIdx();
    assert(uti == Ptr);
    fp->write(m_state.getTmpVarAsString(uvpass.getPtrTargetType(), uvpass.getPtrSlotIndex()).c_str());
    fp->write(", ");

    UTI ruti = ruvpass.getUlamValueTypeIdx();
    assert(ruti == Ptr);
    fp->write(m_state.getTmpVarAsString(ruvpass.getPtrTargetType(), ruvpass.getPtrSlotIndex()).c_str());

    fp->write(", ");
    fp->write_decimal(nut->getBitSize());
    fp->write(");\n");

    uvpass = UlamValue::makePtr(tmpVarNum, TMPREGISTER, nuti, m_state.determinePackable(nuti), m_state, uvpass.getPtrPos(), uvpass.getPtrNameId()); //P

    // current object globals should pertain to lhs for the write
    genCodeWriteFromATmpVar(fp, luvpass, uvpass); //uses rhs' tmpvar; orig lhs

#ifdef TMPVARBRACES
    m_state.m_currentIndentLevel--;
    m_state.indent(fp);
    fp->write("}\n"); //close for tmpVar
#endif
    assert(m_state.m_currentObjSymbolsForCodeGen.empty());
  } //genCode

  EvalStatus NodeSquareBracket::evalToStoreInto()
  {
    assert(m_nodeLeft && m_nodeRight);
    UTI nuti = getNodeType();
    if(nuti == Nav)
      return ERROR;

    evalNodeProlog(0); //new current frame pointer

    makeRoomForSlots(1); //always 1 slot for ptr
    EvalStatus evs = m_nodeLeft->evalToStoreInto();
    if(evs != NORMAL)
      {
	evalNodeEpilog();
	return evs;
      }

    UlamValue pluv = m_state.m_nodeEvalStack.popArg();

    makeRoomForNodeType(m_nodeRight->getNodeType()); //offset a constant expression
    evs = m_nodeRight->eval();
    if(evs != NORMAL)
      {
	evalNodeEpilog();
	return evs;
      }

    UlamValue offset = m_state.m_nodeEvalStack.popArg();

    // constant expression only required for array declaration
    u32 offsetdata = offset.getImmediateData(m_state);
    s32 offsetInt = m_state.getUlamTypeByIndex(offset.getUlamValueTypeIdx())->getDataAsCs32(offsetdata);

    UTI auti = pluv.getPtrTargetType();
    UlamType * aut = m_state.getUlamTypeByIndex(auti);
    if(aut->isCustomArray())
      {
	UTI caType = ((UlamTypeClass *) aut)->getCustomArrayType();
	UlamType * caut = m_state.getUlamTypeByIndex(caType);
	u32 pos = pluv.getPtrPos();
	if(caut->getBitSize() > MAXBITSPERINT)
	  pos = 0;
	//  itemUV = UlamValue::makeAtom(caType);
	//else
	//  itemUV = UlamValue::makeImmediate(caType, 0, m_state);  //quietly skip for now XXX

	//use CA type, not the left ident's type
	UlamValue scalarPtr = UlamValue::makePtr(pluv.getPtrSlotIndex(),
						 pluv.getPtrStorage(),
						 caType,
						 m_state.determinePackable(caType), //PACKEDLOADABLE
						 m_state,
						 pos /* base pos of array */
						 );

	//copy result UV to stack, -1 relative to current frame pointer
	assignReturnValuePtrToStack(scalarPtr);
      }
    else
      {
	//adjust pos by offset * len, according to its scalar type
	UlamValue scalarPtr = UlamValue::makeScalarPtr(pluv, m_state);
	if(scalarPtr.incrementPtr(m_state, offsetInt))
	  //copy result UV to stack, -1 relative to current frame pointer
	  assignReturnValuePtrToStack(scalarPtr);
	else
	  {
	    s32 arraysize = m_state.getArraySize(pluv.getPtrTargetType());
	    Symbol * lsymptr;
	    u32 lid = 0;
	    if(getSymbolPtr(lsymptr))
	      lid = lsymptr->getId();

	    std::ostringstream msg;
	    msg << "Array subscript [" << offsetInt << "] exceeds the size (" << arraysize;
	    msg << ") of array '" << m_state.m_pool.getDataAsString(lid).c_str() << "'";
	    MSG(getNodeLocationAsString().c_str(), msg.str().c_str(), ERR);
	    evs = ERROR;
	  }
      }
    evalNodeEpilog();
    return evs;
  } //evalToStoreInto

  void NodeBinaryOpCompare::genCode(File * fp, UlamValue& uvpass)
  {
    assert(m_nodeLeft && m_nodeRight);
    assert(m_state.m_currentObjSymbolsForCodeGen.empty()); //*************

#ifdef TMPVARBRACES
    m_state.indent(fp);
    fp->write("{\n");
    m_state.m_currentIndentLevel++;
#endif

    // generate rhs first; may update current object globals (e.g. function call)
    UlamValue ruvpass;
    m_nodeRight->genCode(fp, ruvpass);

    // restore current object globals
    assert(m_state.m_currentObjSymbolsForCodeGen.empty()); //*************

    UlamValue luvpass;
    m_nodeLeft->genCode(fp, luvpass); //updates m_currentObjSymbol

    UTI nuti = getNodeType();
    UlamType * nut = m_state.getUlamTypeByIndex(nuti);
    s32 tmpVarNum = m_state.getNextTmpVarNumber();

    m_state.indent(fp);
    fp->write("const ");
    fp->write(nut->getTmpStorageTypeAsString().c_str()); //e.g. u32, s32, u64..
    fp->write(" ");

    fp->write(m_state.getTmpVarAsString(nuti,tmpVarNum).c_str());
    fp->write(" = ");

    fp->write(methodNameForCodeGen().c_str());
    fp->write("(");

    UTI luti = luvpass.getUlamValueTypeIdx();
    assert(luti == Ptr);
    luti = luvpass.getPtrTargetType(); //reset
    fp->write(m_state.getTmpVarAsString(luti, luvpass.getPtrSlotIndex()).c_str());

    fp->write(", ");

    UTI ruti = ruvpass.getUlamValueTypeIdx();
    assert(ruti == Ptr);
    fp->write(m_state.getTmpVarAsString(ruvpass.getPtrTargetType(), ruvpass.getPtrSlotIndex()).c_str());

    fp->write(", ");

    //compare needs size of left/right nodes (only difference!)
    fp->write_decimal(m_state.getUlamTypeByIndex(luti)->getTotalBitSize());

    fp->write(");\n");

    uvpass = UlamValue::makePtr(tmpVarNum, TMPREGISTER, nuti, m_state.determinePackable(nuti), m_state, 0);  //P

#ifdef TMPVARBRACES
    m_state.m_currentIndentLevel--;
    m_state.indent(fp);
    fp->write("}\n"); //close for tmpVar
#endif
    assert(m_state.m_currentObjSymbolsForCodeGen.empty()); //*************
  } //genCode