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Semantics.c
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Semantics.c
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "Definitions.h"
#include "y.tab.h"
extern AstNode *TreeRoot;
/* ----------------------------------------------------------- */
/* ---------------------- FUNCTIONS -------------------------- */
/* ----------------------------------------------------------- */
void kena(int n)
{
int i;
for(i=0; i<n; i++) printf(" ");
}
void traverse(AstNode *p,int n)
{
int i;
n=n+3;
if(p)
{
switch (p->NodeType)
{
case astEmptyProgram:
kena(n); printf("astEmptyProgram\n");
break;
case astProgram:
kena(n); printf("astProgram\n");
break;
case astMethods:
kena(n); printf("astMethods\n");
break;
case astMethod:
kena(n); printf("astMethod\n");
break;
case astFormalParameters:
kena(n); printf("astFormalParameters\n");
break;
case astFormalArrayParameters:
kena(n); printf("astFormalArrayParameters\n");
break;
case astNoFormalParameters:
kena(n); printf("astNoFormalParameters\n");
break;
case astMoreFormalParameters:
kena(n); printf("astMoreFormalParameters\n");
break;
case astNoMoreFormalParameters:
kena(n); printf("astNoMoreFormalParameters\n");
break;
case astTypeInt:
kena(n); printf("astTypeInt\n");
break;
case astTypeReal:
kena(n); printf("astTypeReal\n");
break;
case astBody:
kena(n); printf("astBody\n");
break;
case astDeclarations:
kena(n); printf("astDeclarations\n");
break;
case astNoDeclarations:
kena(n); printf("astNoDeclarations\n");
break;
case astMoreDeclarations:
kena(n); printf("astMoreDeclarations\n");
break;
case astNoMoreDeclarations:
kena(n); printf("astNoMoreDeclarations\n");
break;
case astDeclaration:
kena(n); printf("astDeclaration\n");
break;
case astArrayDeclaration:
kena(n); printf("astArrayDeclaration\n");
break;
case astArrayVariable:
kena(n); printf("astArrayVariable\n");
break;
case astDeclarationExtended:
kena(n); printf("astDeclarationExtended\n");
break;
case astVariable:
kena(n); printf("astVariable\n");
break;
case astVariableExtended:
kena(n); printf("astVariableExtended\n");
break;
case astNoVariable:
kena(n); printf("astNoVariable\n");
break;
case astIncreaseAfter:
kena(n); printf("astIncreaseAfter\n");
break;
case astIncreaseBefore:
kena(n); printf("astIncreaseBefore\n");
break;
case astDecreaseAfter:
kena(n); printf("astDecreaseAfter\n");
break;
case astDecreaseBefore:
kena(n); printf("astDecreaseBefore\n");
break;
case astPlusEquals:
kena(n); printf("astPlusEquals\n");
break;
case astMinusEquals:
kena(n); printf("astMinusEquals\n");
break;
case astTimesEquals:
kena(n); printf("astTimesEquals\n");
break;
case astDivideEquals:
kena(n); printf("astDivideEquals\n");
break;
case astStatements:
kena(n); printf("astStatements\n");
break;
case astNoStatements:
kena(n); printf("astNoStatements\n");
break;
case astIncDecStatement:
kena(n); printf("astIncDecStatement\n");
break;
case astChangeAssignStatement:
kena(n); printf("astChangeAssignStatement\n");
break;
case astReturn:
kena(n); printf("astReturn\n");
break;
case astUnlessStatement:
kena(n); printf("astUnlessStatement\n");
break;
case astIfStatement:
kena(n); printf("astIfStatement\n");
break;
case astIfElseStatement:
kena(n); printf("astIfElseStatement\n");
break;
case astWhileStatement:
kena(n); printf("astWhileStatement\n");
break;
case astRepeatStatement:
kena(n); printf("astRepeatStatement\n");
break;
case astForStatement:
kena(n); printf("astForStatement\n");
break;
case astBreakStatement:
kena(n); printf("astBreakStatement\n");
break;
case astPrintStatement:
kena(n); printf("astPrintStatement\n");
break;
case astPrintlnStatement:
kena(n); printf("astPrintlnStatement\n");
break;
case astMessage:
kena(n); printf("astMessage\n");
//kena(n); printf("astMessage:%s\n", p->SymbolNode->name);
break;
case astMoreMessage:
kena(n); printf("astMoreMessage\n");
break;
case astNoMoreMessage:
kena(n); printf("astNoMoreMessage\n");
break;
case astTextToPrint:
kena(n); printf("astTextToPrint\n");
break;
case astExpressionToPrint:
kena(n); printf("astExpressionToPrint\n");
break;
case astReadStatement:
kena(n); printf("astReadStatement\n");
break;
case astReadWithPrintStatement:
kena(n); printf("astReadWithPrintStatement\n");
break;
case astEmptyStatement:
kena(n); printf("astEmptyStatement\n");
break;
case astStartAssignStatement:
kena(n); printf("astStartAssignStatement\n");
break;
case astAssignStatement:
kena(n); printf("astAssignStatement\n");
break;
case astMoreAssignStatement:
kena(n); printf("astMoreAssignStatement\n");
break;
case astAssignMultipleStatement:
kena(n); printf("astAssignMultipleStatement\n");
break;
case astNestedAssignStatement:
kena(n); printf("astNestedAssignStatement\n");
break;
case astLastNestedAssignStatement:
kena(n); printf("astLastNestedAssignStatement\n");
break;
case astLocation:
kena(n); printf("astLocation\n");
break;
case astMethodName:
kena(n); printf("astMethodName\n");
break;
case astArrayName:
kena(n); printf("astArrayName\n");
break;
case astArrayCall:
kena(n); printf("astArrayCall\n");
break;
case astOrExpression:
kena(n); printf("astOrExpression\n");
break;
case astAndExpression:
kena(n); printf("astAndExpression\n");
break;
case astRelationExpression:
kena(n); printf("astRelationExpression\n");
break;
case astLessOrEqualOperator:
kena(n); printf("astLessOrEqualOperator\n");
break;
case astLessOperator:
kena(n); printf("astLessOperator\n");
break;
case astGreaterOperator:
kena(n); printf("astGreaterOperator\n");
break;
case astGreaterOrEqualOperator:
kena(n); printf("astGreaterOrEqualOperator\n");
break;
case astEqualOperator:
kena(n); printf("astEqualOperator\n");
break;
case astNotEqualOperator:
kena(n); printf("astNotEqualOperator\n");
break;
case astAddExpression:
kena(n); printf("astAddExpression\n");
break;
case astAddOperator:
kena(n); printf("astAddOperator\n");
break;
case astSubtractOperator:
kena(n); printf("astSubtractOperator\n");
break;
case astTerm:
kena(n); printf("astTerm\n");
break;
case astNotOperator:
kena(n); printf("astNotOperator\n");
break;
case astMultiplyOperator:
kena(n); printf("astMultiplyOperator\n");
break;
case astDivideOperator:
kena(n); printf("astDivideOperator\n");
break;
case astModuloOperator:
kena(n); printf("astModuloOperator\n");
break;
case astIntConstant:
kena(n); printf("astIntConstant\n");
break;
case astRealConstant:
kena(n); printf("astRealConstant\n");
break;
case astTrue:
kena(n); printf("astTrue\n");
break;
case astFalse:
kena(n); printf("astFalse\n");
break;
case astMethodCall:
kena(n); printf("astMethodCall\n");
break;
case astActualParameters:
kena(n); printf("astActualParameters\n");
break;
case astNoActualParameters:
kena(n); printf("astNoActualParameters\n");
break;
case astMoreActualParameters:
kena(n); printf("astMoreActualParameters\n");
break;
case astNoMoreActualParameters:
kena(n); printf("astNoMoreActualParameters\n");
break;
default:
printf("AGNOSTO=%d\n",p->NodeType);
}
for(i=0; i<4; i++) traverse(p->pAstNode[i],n);
}
}
// ------------------------------------------------------------------------//
FILE *asmData, *asmCode;
int numIfs = 0;
int numWhiles = 0;
int bytesForParams = 0;
int countRealConsts = 0;
int countIntForConversions = 0;
Symbol* mulAssignLocations[50];
Symbol* mulAssignExpressions[50];
int countLocations = 0;
int countExpressions = 0;
int countAddressVars = 0;
void fkena(int n)
{
int i;
for(i=0; i<n; i++) fprintf(asmCode, " ");
}
/* ------------------------------------------------------------------------ */
/* CodeGeneration */
void ProcessProgram(AstNode*p, int lev){
CodeGeneration(p->pAstNode[0],lev+1,0,0);
}
void ProcessMethods(AstNode*p, int lev){
CodeGeneration(p->pAstNode[0],lev+1,0,0);
CodeGeneration(p->pAstNode[1],lev+1,0,0);
}
void ProcessMethod(AstNode*p, int lev){
bytesForParams = 0;
CodeGeneration(p->pAstNode[1],lev+1,0,0); // Parameters
fprintf(asmCode, "%s:\n", p->SymbolNode->MIXname);
fprintf(asmCode, " push ebp\n");
fprintf(asmCode, " mov ebp, esp\n");
CodeGeneration(p->pAstNode[2],lev+1,0,0); // Body
fprintf(asmCode, "\n; ----------------------- ;\n\n");
}
void ProcessReturn(AstNode *p,int lev,int lvalue,int leftChild){
Symbol *lhs, *currentMethod;
CodeGeneration(p->pAstNode[0],lev+1,0,0);
lhs = pop_vs();
currentMethod = p->SymbolNode;
switch (currentMethod->type){
case INT:
switch (lhs->type){
case INT: // ---- return int on int method ---- //
switch(lhs->sclass){
case MEMORY:
fprintf(asmCode, " mov eax, [%s]\n", lhs->MIXname);
break;
case CONSTANT:
fprintf(asmCode, " mov eax, %d\n", lhs->value);
break;
case REGISTER:
fprintf(asmCode, " mov eax, [REG_INT]\n");
break;
case STACK:
printf("IMPOSSIBLE (STACK in return)\n");
break;
}
break;
case REAL: // ---- return real on int method ---- //
switch(lhs->sclass){
case MEMORY:
fprintf(asmCode, " fld qword [%s]\n", lhs->MIXname);
fprintf(asmData, "int_for_conversion_%d dd 0\n", ++countIntForConversions);
fprintf(asmCode, " fistp dword [int_for_conversion_%d]\n", countIntForConversions);
fprintf(asmCode, " mov eax, [int_for_conversion_%d]\n", countIntForConversions);
break;
case CONSTANT:
fprintf(asmData, "real_constant_%d dq %lf\n", ++countRealConsts, lhs->dvalue);
fprintf(asmCode, " fld qword [real_constant_%d]\n", countRealConsts);
fprintf(asmData, "int_for_conversion_%d dd 0\n", ++countIntForConversions);
fprintf(asmCode, " fistp dword [int_for_conversion_%d]\n", countIntForConversions);
fprintf(asmCode, " mov eax, [int_for_conversion_%d]\n", countIntForConversions);
break;
case REGISTER:
fprintf(asmCode, " fld qword [REG_REAL]\n");
fprintf(asmData, "int_for_conversion_%d dd 0\n", ++countIntForConversions);
fprintf(asmCode, " fistp dword [int_for_conversion_%d]\n", countIntForConversions);
fprintf(asmCode, " mov eax, [int_for_conversion_%d]\n", countIntForConversions);
break;
case STACK:
printf("IMPOSSIBLE (STACK in return)\n");
break;
}
break;
}
break;
case REAL:
switch (lhs->type){
case INT: // ---- return int on real method ---- //
switch(lhs->sclass){
case MEMORY:
fprintf(asmCode, " fild dword [%s]\n", lhs->MIXname);
break;
case CONSTANT:
fprintf(asmData, "int_for_conversion_%d dd %d\n", ++countIntForConversions, lhs->value);
fprintf(asmCode, " fild dword [int_for_conversion_%d]\n", countIntForConversions);
break;
case REGISTER:
fprintf(asmCode, " fild dword [REG_INT]\n");
break;
case STACK:
printf("IMPOSSIBLE (STACK in return)\n");
break;
}
break;
case REAL: // ---- return real on real method ---- //
switch(lhs->sclass){
case MEMORY:
fprintf(asmCode, " fld qword [%s]\n", lhs->MIXname);
break;
case CONSTANT:
fprintf(asmData, "real_constant_%d dq %lf\n", ++countRealConsts, lhs->dvalue);
fprintf(asmCode, " fld qword [real_constant_%d]\n", countRealConsts);
break;
case REGISTER:
fprintf(asmCode, " fld qword [REG_REAL]\n");
break;
case STACK:
printf("IMPOSSIBLE (STACK in return)\n");
break;
}
break;
}
break;
}
fprintf(asmCode, " mov esp, ebp\n");
fprintf(asmCode, " pop ebp\n");
fprintf(asmCode, " ret %d\n", bytesForParams);
}
void ProcessBody(AstNode*p, int lev){
CodeGeneration(p->pAstNode[0],lev+1,0,0);
CodeGeneration(p->pAstNode[1],lev+1,0,0);
}
void ProcessStatements(AstNode*p, int lev){
CodeGeneration(p->pAstNode[0],lev+1,0,0);
CodeGeneration(p->pAstNode[1],lev+1,0,0);
}
void ProcessStartAssignStatement(AstNode*p, int lev){
Symbol *lhs;
CodeGeneration(p->pAstNode[0],lev+1,0,0); // Assign
lhs = pop_vs();
if (lhs->type == REAL){
// pop the expression from fp stack
fprintf(asmCode, " ffreep\n");
}
}
void ProcessAssignStatement(AstNode*p, int lev){
Symbol *lhs, *rhs;
CodeGeneration(p->pAstNode[0],lev+1,0,0); // Location or ArrayName
lhs = pop_vs();
CodeGeneration(p->pAstNode[1],lev+1,0,0); // Expression
rhs = pop_vs();
if (lhs->genre == ARRAY){
fprintf(asmCode, " mov ecx, [%s]\n", lhs->MIXname);
strcpy(lhs->MIXname, "ecx");
}
switch (lhs->type){
case INT:
switch (rhs->type){
case INT: // ---- INT = INT ---- //
switch (rhs->sclass){
case MEMORY:
fprintf(asmCode, " mov eax, [%s]\n", rhs->MIXname);
break;
case CONSTANT:
fprintf(asmCode, " mov eax, %d\n", rhs->value);
break;
case REGISTER:
fprintf(asmCode, " mov eax, [REG_INT]\n");
break;
case STACK:
printf("IMPOSSIBLE (LOCATION=STACK)");
break;
}
fprintf(asmCode, " mov dword [%s], eax\n", lhs->MIXname);
break;
case REAL: // ---- INT = REAL ---- //
switch (rhs->sclass){
case MEMORY:
fprintf(asmCode, " fld qword [%s]\n", rhs->MIXname);
break;
case CONSTANT:
fprintf(asmData, "real_constant_%d dq %lf\n", ++countRealConsts, rhs->dvalue);
fprintf(asmCode, " fld qword [real_constant_%d]\n", countRealConsts);
break;
case REGISTER:
fprintf(asmCode, " fld qword [REG_REAL]\n");
break;
case STACK:
printf("IMPOSSIBLE (LOCATION=STACK)");
break;
}
fprintf(asmCode, " fist dword [%s]\n", lhs->MIXname);
break;
}
break;
case REAL:
switch (rhs->type){
case INT: // ---- REAL = INT ---- //
switch (rhs->sclass){
case MEMORY:
fprintf(asmCode, " fild dword [%s]\n", rhs->MIXname);
break;
case CONSTANT:
fprintf(asmData, "int_for_conversion_%d dd %d\n", ++countIntForConversions, rhs->value);
fprintf(asmCode, " fild dword [int_for_conversion_%d]\n", countIntForConversions);
break;
case REGISTER:
fprintf(asmCode, " fild dword [REG_REAL]\n");
break;
case STACK:
printf("IMPOSSIBLE (LOCATION=STACK)");
break;
}
fprintf(asmCode, " fst qword [%s]\n", lhs->MIXname);
break;
case REAL: // ---- REAL = REAL ---- //
switch (rhs->sclass){
case MEMORY:
fprintf(asmCode, " fld qword [%s]\n", rhs->MIXname);
break;
case CONSTANT:
fprintf(asmData, "real_constant_%d dq %lf\n", ++countRealConsts, rhs->dvalue);
fprintf(asmCode, " fld qword [real_constant_%d]\n", countRealConsts);
break;
case REGISTER:
fprintf(asmCode, " fld qword [REG_REAL]\n");
break;
case STACK:
printf("IMPOSSIBLE (LOCATION=STACK)");
break;
}
fprintf(asmCode, " fst qword [%s]\n", lhs->MIXname);
break;
}
break;
}
push_vs(rhs);
}
void ProcessMoreAssignStatement(AstNode*p, int lev){
Symbol *lhs, *rhs;
CodeGeneration(p->pAstNode[1],lev+1,0,0); // Assign
rhs = pop_vs();
CodeGeneration(p->pAstNode[0],lev+1,0,0); // Location or ArrayName
lhs = pop_vs();
if (lhs->genre == ARRAY){
fprintf(asmCode, " mov ecx, [%s]\n", lhs->MIXname);
strcpy(lhs->MIXname, "ecx");
}
switch (lhs->type){
case INT:
switch (rhs->type){
case INT: // ---- INT = INT ---- //
fprintf(asmCode, " mov dword [%s], eax\n", lhs->MIXname);
break;
case REAL: // ---- INT = REAL ---- //
fprintf(asmCode, " fist dword [%s]\n", lhs->MIXname);
break;
}
break;
case REAL:
switch (rhs->type){
case INT: // ---- REAL = INT ---- //
fprintf(asmCode, " fst qword [%s]\n", lhs->MIXname);
break;
case REAL: // ---- REAL = REAL ---- //
fprintf(asmCode, " fst qword [%s]\n", lhs->MIXname);
break;
}
break;
}
push_vs(rhs);
}
void ProcessAssignMultipleStatement(AstNode*p, int lev){
Symbol *lhs, *rhs, *locationToAssign, *expressionToAssign;
CodeGeneration(p->pAstNode[0],lev+1,0,0); // Location or ArrayName
lhs = pop_vs();
mulAssignLocations[countLocations++] = lhs;
CodeGeneration(p->pAstNode[1],lev+1,0,0); // NestedAssign
CodeGeneration(p->pAstNode[2],lev+1,0,0); // Expression
rhs = pop_vs();
mulAssignExpressions[countExpressions++] = rhs;
switch (rhs->type){
case INT:
switch (rhs->sclass){
case MEMORY:
fprintf(asmCode, " push dword [%s]\n", rhs->MIXname);
break;
case CONSTANT:
fprintf(asmCode, " push %d\n", rhs->value);
break;
case REGISTER:
fprintf(asmCode, " push dword [REG_INT]\n");
break;
case STACK:
printf("IMPOSSIBLE (LOCATION=STACK)");
break;
}
break;
case REAL:
switch (rhs->sclass){
case MEMORY:
fprintf(asmCode, " sub esp, 8\n");
fprintf(asmCode, " fld qword [%s]\n", rhs->MIXname);
fprintf(asmCode, " fstp qword [esp]\n");
break;
case CONSTANT:
fprintf(asmData, "real_constant_%d dq %lf\n", ++countRealConsts, rhs->dvalue);
fprintf(asmCode, " sub esp, 8\n");
fprintf(asmCode, " fld qword [real_constant_%d]\n", countRealConsts);
fprintf(asmCode, " fstp qword [esp]\n");
break;
case REGISTER:
fprintf(asmCode, " sub esp, 8\n");
fprintf(asmCode, " fld qword [REG_REAL]\n");
fprintf(asmCode, " fstp qword [esp]\n");
break;
case STACK:
printf("IMPOSSIBLE (LOCATION=STACK)");
break;
}
break;
}
// Assign value of rhs to the variable locationToAssign
int i;
for (i = countLocations-1; i >= 0; i--){
locationToAssign = mulAssignLocations[i];
expressionToAssign = mulAssignExpressions[i];
if (locationToAssign->genre == ARRAY){
fprintf(asmCode, " mov ecx, [%s]\n", locationToAssign->MIXname);
strcpy(locationToAssign->MIXname, "ecx");
}
switch (locationToAssign->type){
case INT:
switch (expressionToAssign->type){
case INT:
fprintf(asmCode, " pop eax\n");
fprintf(asmCode, " mov dword [%s], eax\n", locationToAssign->MIXname);
break;
case REAL:
fprintf(asmCode, " fld qword [esp]\n");
fprintf(asmCode, " add esp, 8\n");
fprintf(asmCode, " fistp dword [%s]\n", locationToAssign->MIXname);
break;
}
break;
case REAL:
switch (expressionToAssign->type){
case INT:
fprintf(asmData, "int_for_conversion_%d dd 0\n", ++countIntForConversions);
fprintf(asmCode, " pop dword [int_for_conversion_%d]\n", countIntForConversions);
fprintf(asmCode, " fild dword [int_for_conversion_%d]\n", countIntForConversions);
fprintf(asmCode, " fstp qword [%s]\n", locationToAssign->MIXname);
break;
case REAL:
fprintf(asmCode, " fld qword [esp]\n");
fprintf(asmCode, " add esp, 8\n");
fprintf(asmCode, " fstp qword [%s]\n", locationToAssign->MIXname);
break;
}
break;
}
}
countLocations = 0;
countExpressions = 0;
}
void ProcessNestedAssignStatement(AstNode*p, int lev){
Symbol *lhs, *rhs, *locationToAssign;
CodeGeneration(p->pAstNode[0],lev+1,0,0); // Location or ArrayName
lhs = pop_vs();
mulAssignLocations[countLocations++] = lhs;
CodeGeneration(p->pAstNode[1],lev+1,0,0); // NestedAssign
CodeGeneration(p->pAstNode[2],lev+1,0,0); // Expression
rhs = pop_vs();
mulAssignExpressions[countExpressions++] = rhs;
switch (rhs->type){
case INT:
switch (rhs->sclass){
case MEMORY:
fprintf(asmCode, " push dword [%s]\n", rhs->MIXname);
break;
case CONSTANT:
fprintf(asmCode, " push %d\n", rhs->value);
break;
case REGISTER:
fprintf(asmCode, " push dword [REG_INT]\n");
break;
case STACK:
printf("IMPOSSIBLE (LOCATION=STACK)");
break;
}
break;
case REAL:
switch (rhs->sclass){
case MEMORY:
fprintf(asmCode, " sub esp, 8\n");
fprintf(asmCode, " fld qword [%s]\n", rhs->MIXname);
fprintf(asmCode, " fstp qword [esp]\n");
break;
case CONSTANT:
fprintf(asmData, "real_constant_%d dq %lf\n", ++countRealConsts, rhs->dvalue);
fprintf(asmCode, " sub esp, 8\n");
fprintf(asmCode, " fld qword [real_constant_%d]\n", countRealConsts);
fprintf(asmCode, " fstp qword [esp]\n");
break;
case REGISTER:
fprintf(asmCode, " sub esp, 8\n");
fprintf(asmCode, " fld qword [REG_REAL]\n");
fprintf(asmCode, " fstp qword [esp]\n");
break;
case STACK:
printf("IMPOSSIBLE (LOCATION=STACK)");
break;
}
break;
}
}
void ProcessLastNestedAssignStatement(AstNode*p, int lev){
Symbol *lhs, *rhs, *locationToAssign;
CodeGeneration(p->pAstNode[0],lev+1,0,0); // Location or ArrayName
lhs = pop_vs();
mulAssignLocations[countLocations++] = lhs;
CodeGeneration(p->pAstNode[1],lev+1,0,0); // Expression
rhs = pop_vs();
mulAssignExpressions[countExpressions++] = rhs;
switch (rhs->type){
case INT:
switch (rhs->sclass){
case MEMORY:
fprintf(asmCode, " push dword [%s]\n", rhs->MIXname);
break;
case CONSTANT:
fprintf(asmCode, " push %d\n", rhs->value);
break;
case REGISTER:
fprintf(asmCode, " push dword [REG_INT]\n");
break;
case STACK:
printf("IMPOSSIBLE (LOCATION=STACK)");
break;
}
break;
case REAL:
switch (rhs->sclass){
case MEMORY:
fprintf(asmCode, " sub esp, 8\n");
fprintf(asmCode, " fld qword [%s]\n", rhs->MIXname);
fprintf(asmCode, " fstp qword [esp]\n");
break;
case CONSTANT:
fprintf(asmData, "real_constant_%d dq %lf\n", ++countRealConsts, rhs->dvalue);
fprintf(asmCode, " sub esp, 8\n");
fprintf(asmCode, " fld qword [real_constant_%d]\n", countRealConsts);
fprintf(asmCode, " fstp qword [esp]\n");
break;
case REGISTER:
fprintf(asmCode, " sub esp, 8\n");
fprintf(asmCode, " fld qword [REG_REAL]\n");
fprintf(asmCode, " fstp qword [esp]\n");
break;
case STACK:
printf("IMPOSSIBLE (LOCATION=STACK)");
break;
}
break;
}
}
void ProcessAddExpression(AstNode* p, int lev, int lvalue, int leftChild){
Symbol *lhs, *rhs, *new;
CodeGeneration(p->pAstNode[0],lev+1,lvalue,1); // Expression
lhs=pop_vs();
CodeGeneration(p->pAstNode[2],lev+1,lvalue,0); // Term
rhs=pop_vs();
new = new_symbol("");
new->lvalue = 0;
//new->type = INT;
new->sclass = REGISTER;
if (p->pAstNode[1]->NodeType == astAddOperator){
/* -------- Add -------- */
switch (lhs->type){
case INT:
switch (rhs->type){
case INT: // ---- INT + INT ---- //
new->type = INT;
switch (lhs->sclass){
case MEMORY:
fprintf(asmCode, " mov eax, [%s]\n", lhs->MIXname);
switch (rhs->sclass){
case MEMORY:
fprintf(asmCode, " add eax, [%s]\n", rhs->MIXname);
break;
case CONSTANT:
fprintf(asmCode, " add eax, %d\n", rhs->value);
break;
case REGISTER:
fprintf(asmCode, " add eax, [REG_INT]\n");
break;
case STACK:
printf("IMPOSSIBLE (MEMORY-STACK)\n");
break;
}
break;
case CONSTANT:
switch (rhs->sclass){
case MEMORY:
fprintf(asmCode, " mov eax, %d\n", lhs->value);
fprintf(asmCode, " add eax, [%s]\n", rhs->MIXname);
break;
case CONSTANT:
new->value = lhs->value + rhs->value;
new->sclass=CONSTANT;
break;
case REGISTER:
fprintf(asmCode, " mov eax, %d\n", lhs->value);
fprintf(asmCode, " add eax, [REG_INT]\n");
break;
case STACK:
printf("IMPOSSIBLE (CONSTANT-STACK)\n");
break;
}
break;
case REGISTER:
printf("IMPOSSIBLE (REGISTER-*)\n");
break;
case STACK:
fprintf(asmCode, " pop eax\n");
switch (rhs->sclass){
case MEMORY:
fprintf(asmCode, " add eax, [%s]\n", rhs->MIXname);
break;
case CONSTANT:
fprintf(asmCode, " add eax, %d\n", rhs->value);
break;
case REGISTER:
fprintf(asmCode, " add eax, [REG_INT]\n");
break;
case STACK:
printf("IMPOSSIBLE (STACK-STACK)\n");
break;
}
break;
}
break;
case REAL: // ---- INT + REAL ---- //
new->type = REAL;
switch (lhs->sclass){
case MEMORY:
fprintf(asmCode, " fild dword [%s]\n", lhs->MIXname);
switch (rhs->sclass){
case MEMORY:
fprintf(asmCode, " fadd qword [%s]\n", rhs->MIXname);
break;
case CONSTANT: