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parser.y
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parser.y
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/* -*- C++ LALR1 Parser specification -*- */
%skeleton "lalr1.cc"
%require "3.0.4"
%defines
%define parser_class_name {mm_parser};
/* Generate token constructors */
%define api.token.constructor;
/* Use C++ variant semantic values */
%define api.value.type variant;
%define parse.assert;
/* Expect only 1 shift/reduce conflict on "else" token. */
%expect 1;
%code requires {
#include <string>
#include "types.hh"
#include "symbols.hh"
#include "expressions.hh"
class mm_translator;
}
/* A translator object is used to construct its parser. */
%param {mm_translator &translator};
%code {
/* Include translator definitions completely */
#include "translator.hh"
/* Helper functions to get dereferenced symbols for scalars
* Only used when Expression is known to be non-matrix type. */
SymbolRef
getScalarBinaryOperand(mm_translator & ,
yy::mm_parser & ,
const yy::location & ,
Expression & );
SymbolRef
getIntegerBinaryOperand(mm_translator & ,
yy::mm_parser & ,
const yy::location & ,
Expression & );
/* Checks if the given symbol has type equal to given type on not.
If not, then converts / throws accordingly. */
SymbolRef typeCheck(SymbolRef, // symbol
DataType &,// type
bool, // convert?
mm_translator &,
yy::mm_parser &,
const yy::location & );
/* Emits opcodes for performing a scalar binary operation */
void emitScalarBinaryOperation(char ,
mm_translator &,
yy::mm_parser &,
Expression & ,
Expression & ,
Expression & ,
const yy::location &,
const yy::location &,
const yy::location & );
/* For bitwise / modulo operations */
void emitIntegerBinaryOperation(char ,
mm_translator &,
yy::mm_parser &,
Expression &,
Expression &,
Expression &,
const yy::location &,
const yy::location &,
const yy::location & );
/* For comparison operations */
void emitConditionOperation(char ,
mm_translator &,
yy::mm_parser &,
Expression &,
Expression &,
Expression &,
const yy::location &,
const yy::location &,
const yy::location & );
/* Dereference any pointer / matrix element */
void dereference(mm_translator &,Expression &);
/* Emit opcodes to call a function after creating appropriate temporaries. */
void callFunction(mm_translator &,
yy::mm_parser &,
yy::location &,
Expression &,
unsigned int ,//table id of the function
std::vector<Expression> &);
}
/* Enable bison location tracking */
%locations;
/* Initialize the parser location to the new file */
%initial-action{
@$.initialize( &translator.file );
}
/* Enable verbose parse tracing */
%define parse.trace;
%define parse.error verbose;
/* Prefix all token constants with TOK_ */
%define api.token.prefix {TOK_};
/**************************************************/
/**********Begin token definitions*****************/
%token
END 0 "EOF"
MM_IF "if"
MM_ELSE "else"
MM_DO "do"
MM_WHILE "while"
MM_FOR "for"
MM_RETURN "return"
MM_VOID "void"
MM_CHAR "char"
MM_INT "int"
MM_DOUBLE "double"
MM_MATRIX "Matrix"
LBRACE "{"
RBRACE "}"
LBOX "["
RBOX "]"
LBRACKET "("
RBRACKET ")"
INC "++"
DEC "--"
SHL "<<"
SHR ">>"
AND "&&"
OR "||"
TRANSPOSE ".'"
AMPERSAND "&"
CARET "^"
BAR "|"
NOT "!"
STAR "*"
PLUS "+"
MINUS "-"
SLASH "/"
TILDE "~"
PERCENT "%"
ASSGN "="
LT "<"
GT ">"
LTE "<="
GTE ">="
EQUAL "=="
NEQ "!="
QMARK "?"
COLON ":"
SEMICOLON ";"
COMMA ","
;
%token <std::string> IDENTIFIER STRING_LITERAL ;
%token <char> CHARACTER_CONSTANT ;
/* Only 32-bit signed integer is supported. */
%token <int> INTEGER_CONSTANT ;
/* All float-point arithmetic is in double precision only. */
%token <double> FLOATING_CONSTANT ;
/************End token definitions*****************/
/**************************************************/
/* Parse debugger */
%printer { yyoutput << $$ ; } <int> ;
%printer { yyoutput << $$ ; } <double> ;
%printer { yyoutput << $$ ; } <std::string> ;
%%
/**********************************************************************/
/*********************EXPRESSION NON-TERMINALS*************************/
/**********************************************************************/
%type <Expression> primary_expression;
primary_expression :
IDENTIFIER {
std::string curPrefix = translator.scopePrefix;
unsigned int scope = translator.currentEnvironment();
bool found = false;
for( ; ; ) {
try {
$$.symbol = translator.lookup( std::string(curPrefix + $1) );
found = true;
} catch ( ... ) {
}
unsigned int parent = translator.tables[scope].parent;
if( found or parent == scope ) break; // global scope
unsigned int curLength = translator.tables[scope].name.length();
curPrefix = curPrefix.substr(0,curPrefix.length() - curLength - 2);
scope = parent;
}
if(not found) {
throw syntax_error(@$ , "Identifier :"+$1+" not declared in scope.") ;
}
$$.auxSymbol = $$.symbol;
$$.isReference = true;
} | INTEGER_CONSTANT {
DataType intType = MM_INT_TYPE;
SymbolRef ref = translator.genTemp(intType);
Symbol & temp = translator.getSymbol(ref);
temp.symType = SymbolType::CONST;
temp.value.intVal = $1;
temp.isInitialized = temp.isConstant = true;
$$.symbol = ref;
} | FLOATING_CONSTANT {
DataType doubleType = MM_DOUBLE_TYPE;
SymbolRef ref = translator.genTemp(doubleType);
Symbol & temp = translator.getSymbol(ref);
temp.symType = SymbolType::CONST;
temp.value.doubleVal = $1;
temp.isInitialized = temp.isConstant = true;
$$.symbol = ref;
} | CHARACTER_CONSTANT {
DataType charType = MM_CHAR_TYPE;
SymbolRef ref = translator.genTemp(charType);
Symbol & temp = translator.getSymbol(ref);
temp.symType = SymbolType::CONST;
temp.value.charVal = $1;
temp.isInitialized = temp.isConstant = true;
$$.symbol = ref;
} | STRING_LITERAL {
DataType charPointerType = MM_STRING_TYPE;
SymbolRef ref = translator.genTemp(charPointerType);
Symbol & temp = translator.getSymbol(ref);
temp.isInitialized = temp.isConstant = true;
temp.symType = SymbolType::CONST;
temp.value.intVal = translator.stringTable.size();
translator.stringTable.emplace_back($1);
$$.symbol = ref;
} | "(" expression ")" {
std::swap($$,$2);
} ;
%type <Expression> postfix_expression;
postfix_expression:
primary_expression {
std::swap($$,$1);
} |
/* Store element offset. Turn on reference flag.
Empty expressions not allowed, exactly two indices are required. */
postfix_expression "[" expression "]" "[" expression "]" {
if( $1.isReference and translator.isMatrixReference($1) ) {
throw syntax_error(@1,"Syntax error.");
}
Symbol & lSym = translator.getSymbol($1.symbol);
std::swap($$,$1);
if( lSym.type.isStaticMatrix() ) {// simple matricks
DataType addressType = MM_INT_TYPE;
SymbolRef tempRef = translator.genTemp(addressType);
Symbol & temp = translator.getSymbol(tempRef);
Symbol & LHS = translator.getSymbol($$.symbol);
Symbol & rowIndex = translator.getSymbol($3.symbol);
Symbol & colIndex = translator.getSymbol($6.symbol);
if( rowIndex.type != MM_INT_TYPE or colIndex.type != MM_INT_TYPE ) {
throw syntax_error(@$ , "Non-integral index for matrix " + LHS.id + "." );
}
translator.emit(Taco(OP_MULT,temp.id,rowIndex.id,std::to_string(LHS.type.cols)));
translator.emit(Taco(OP_PLUS,temp.id,temp.id,colIndex.id));
translator.emit(Taco(OP_MULT,temp.id,temp.id,std::to_string(SIZE_OF_DOUBLE)));
translator.emit(Taco(OP_PLUS,temp.id,temp.id,std::to_string(2*SIZE_OF_INT)));
if( rowIndex.isConstant and colIndex.isConstant ) {
temp.isConstant = temp.isInitialized = true;
temp.value.intVal =
(rowIndex.value.intVal * LHS.type.cols + colIndex.value.intVal ) *SIZE_OF_DOUBLE
+ 2 * SIZE_OF_INT;
temp.symType = SymbolType::CONST;
}
$$.auxSymbol = tempRef;
$$.isReference = true;
} else if( lSym.type.isMatrix() ) {
DataType addressType = MM_INT_TYPE;
SymbolRef tempRef = translator.genTemp(addressType);
Symbol & temp = translator.getSymbol(tempRef);
Symbol & LHS = translator.getSymbol($$.symbol);
Symbol & rowIndex = translator.getSymbol($3.symbol);
Symbol & colIndex = translator.getSymbol($6.symbol);
if( rowIndex.type != MM_INT_TYPE or colIndex.type != MM_INT_TYPE ) {
throw syntax_error(@$ , "Non-integral index for matrix " + LHS.id + "." );
}
translator.emit(Taco(OP_RXC,temp.id,LHS.id, std::to_string(SIZE_OF_INT) ));//t = m[4] (# of columns)
translator.emit(Taco(OP_MULT,temp.id,rowIndex.id,temp.id));
translator.emit(Taco(OP_PLUS,temp.id,temp.id,colIndex.id));
translator.emit(Taco(OP_MULT,temp.id,temp.id,std::to_string(SIZE_OF_DOUBLE)));
translator.emit(Taco(OP_PLUS,temp.id,temp.id,std::to_string(2*SIZE_OF_INT)));
$$.auxSymbol = tempRef;
$$.isReference = true;
} else {
throw syntax_error(@$ , "Illegal type for subscripting.");
}
} |
/* Function call */
postfix_expression "(" optional_argument_list ")" {
Symbol & fSym = translator.getSymbol($1.symbol);
if( fSym.type != MM_FUNC_TYPE ) {
throw syntax_error(@1,"Not a function.");
}
callFunction(translator,*this,@$,$$,fSym.child,$3);
} |
postfix_expression inc_dec_op { // inc_dec_op generates ++ or --
std::swap($$,$1);
DataType baseType = translator.getSymbol($$.symbol).type;
if( $$.isReference ) {
if( translator.isSimpleReference($$) ) {
if(baseType == MM_CHAR_TYPE or baseType == MM_INT_TYPE or baseType == MM_DOUBLE_TYPE) {// basic types
SymbolRef retRef = translator.genTemp(baseType);
Symbol & ret = translator.getSymbol(retRef);
Symbol & LHS = translator.getSymbol($$.symbol);
translator.emit(Taco(OP_COPY,ret.id,LHS.id));// value before incrementation / decrementation
if( $2 == '+' ) translator.emit(Taco(OP_PLUS,LHS.id,LHS.id,"1"));
else translator.emit(Taco(OP_MINUS,LHS.id,LHS.id,"1"));
$$.symbol = retRef;
} else if( baseType.isPointer() ) {
DataType elementType = baseType; elementType.pointers--;
SymbolRef retRef = translator.genTemp(baseType);
Symbol & ret = translator.getSymbol(retRef);
Symbol & LHS = translator.getSymbol($$.symbol);
translator.emit(Taco(OP_COPY,ret.id,LHS.id));// value before incrementation / decrementation
if( $2 == '+' ) translator.emit(Taco(OP_PLUS,LHS.id,LHS.id,std::to_string(elementType.getSize())));
else translator.emit(Taco(OP_MINUS,LHS.id,LHS.id,std::to_string(elementType.getSize())));
$$.symbol = retRef;
} else {// matrix or other types
throw syntax_error(@1,"Invalid operand.");
}
} else if( translator.isMatrixReference($$) ) {// matrix element
DataType returnType = MM_DOUBLE_TYPE;
SymbolRef retRef = translator.genTemp(returnType);
SymbolRef newRef = translator.genTemp(returnType);
Symbol & retSymbol = translator.getSymbol(retRef);
Symbol & auxSymbol = translator.getSymbol($$.auxSymbol);
Symbol & LHS = translator.getSymbol($$.symbol);
translator.emit(Taco(OP_RXC,retSymbol.id,LHS.id,auxSymbol.id));// ret = m[off]
Symbol & newSymbol = translator.getSymbol(newRef);
if( $2 == '+' ) translator.emit(Taco(OP_PLUS,newSymbol.id,retSymbol.id,"1"));// temp = ret+1
else translator.emit(Taco(OP_MINUS,newSymbol.id,retSymbol.id,"1"));// temp = ret-1
translator.emit(Taco(OP_LXC,LHS.id,auxSymbol.id,newSymbol.id));//copy back : m[off] = temp
$$.symbol = retRef;
$$.isReference = false;
} else if( translator.isPointerReference($$) ) {
SymbolRef newRef = translator.genTemp(baseType);
Symbol & newSymbol = translator.getSymbol(newRef);// stores new value
Symbol & retSymbol = translator.getSymbol($$.symbol);// return value
Symbol & pointerId = translator.getSymbol($$.auxSymbol);// pointer id
if( baseType.isPointer() ) {
DataType elementType = baseType; elementType.pointers--;
if( $2 == '+' )
translator.emit(Taco(OP_PLUS,newSymbol.id,retSymbol.id,std::to_string(elementType.getSize())));// new = ret+sz
else
translator.emit(Taco(OP_MINUS,newSymbol.id,retSymbol.id,std::to_string(elementType.getSize())));// new = ret-sz
} else if( baseType == MM_CHAR_TYPE or baseType == MM_INT_TYPE or baseType == MM_DOUBLE_TYPE ) {// basic types
if( $2 == '+' ) translator.emit(Taco(OP_PLUS,newSymbol.id,retSymbol.id,"1"));// new = ret+1
else translator.emit(Taco(OP_MINUS,newSymbol.id,retSymbol.id,"1"));// new = ret-1
} else {
throw syntax_error(@1 , "Invalid operand.");
}
translator.emit(Taco(OP_L_DEREF,pointerId.id,newSymbol.id));//copy back : *ptr = new
} else {
throw syntax_error(@1,"Invalid operand.");
}
$$.isReference = false;
} else {
throw syntax_error(@1,"Invalid operand.");
}
} |
postfix_expression ".'" {
std::swap($$,$1);
if( translator.isMatrixOperand($$) ) {
DataType matType = MM_MATRIX_TYPE;
SymbolRef retRef = translator.genTemp(matType);
Symbol & retSym = translator.getSymbol(retRef);
Symbol & matSym = translator.getSymbol($$.symbol);
translator.emit(Taco(OP_ALLOC,retSym.id,"",matSym.id)); // DogeMaster
translator.emit(Taco(OP_TRANSPOSE,retSym.id,matSym.id));// ret = m.'
$$.symbol = retRef;
$$.isReference = false;
} else {
throw syntax_error(@$, "Transpose of non-matrix operand.");
}
} ;
%type <char> inc_dec_op;
inc_dec_op : "++" { $$ = '+'; } | "--" { $$ = '-'; } ;
%type < std::vector<Expression> > optional_argument_list argument_list;
optional_argument_list : %empty { } | argument_list { std::swap($$,$1); } ;
argument_list :
expression {
dereference(translator,$1); // Pass argument
$$.push_back($1);
} | argument_list "," expression {
std::swap($$,$1);
dereference(translator,$3); // Pass argument
$$.push_back($3);
} ;
%type <Expression> unary_expression;
unary_expression : postfix_expression { std::swap($$,$1); } |
inc_dec_op unary_expression { // prefix increment /decrement operator
std::swap($$,$2);
DataType baseType = translator.getSymbol($$.symbol).type;
if( $$.isReference ) {
if( translator.isSimpleReference($$) ) {
if(baseType == MM_CHAR_TYPE or baseType == MM_INT_TYPE or baseType == MM_DOUBLE_TYPE) {// basic types
SymbolRef retRef = translator.genTemp(baseType);
Symbol & ret = translator.getSymbol(retRef);
Symbol & RHS = translator.getSymbol($$.symbol);
if( $1 == '+' ) translator.emit(Taco(OP_PLUS,ret.id,RHS.id,"1"));
else translator.emit(Taco(OP_MINUS,ret.id,RHS.id,"1"));
translator.emit(Taco(OP_COPY,RHS.id,ret.id));// value after incrementation / decrementation
$$.symbol = retRef;
} else if( baseType.isPointer() ) {
DataType elementType = baseType; elementType.pointers--;
SymbolRef retRef = translator.genTemp(baseType);
Symbol & ret = translator.getSymbol(retRef);
Symbol & RHS = translator.getSymbol($$.symbol);
if( $1 == '+' ) translator.emit(Taco(OP_PLUS,ret.id,RHS.id,std::to_string(elementType.getSize())));
else translator.emit(Taco(OP_MINUS,ret.id,RHS.id,std::to_string(elementType.getSize())));
translator.emit(Taco(OP_COPY,RHS.id,ret.id));// value after incrementation / decrementation
$$.symbol = retRef;
} else {// matrix or other types
throw syntax_error(@2,"Invalid operand.");
}
} else if( translator.isMatrixReference($$) ) {// matrix element
DataType returnType = MM_DOUBLE_TYPE;
SymbolRef retRef = translator.genTemp(returnType);
Symbol & retSymbol = translator.getSymbol(retRef);
Symbol & auxSymbol = translator.getSymbol($$.auxSymbol);
Symbol & RHS = translator.getSymbol($$.symbol);
translator.emit(Taco(OP_RXC,retSymbol.id,RHS.id,auxSymbol.id));// ret = m[off]
if( $1 == '+' ) translator.emit(Taco(OP_PLUS,retSymbol.id,retSymbol.id,"1"));// ret = ret+1
else translator.emit(Taco(OP_MINUS,retSymbol.id,retSymbol.id,"1"));// ret = ret-1
translator.emit(Taco(OP_LXC,RHS.id,auxSymbol.id,retSymbol.id));//copy back : m[off] = temp
$$.symbol = retRef;
$$.isReference = false;
} else if( translator.isPointerReference($$) ) {
Symbol & retSymbol = translator.getSymbol($$.symbol);// return value
Symbol & pointerId = translator.getSymbol($$.auxSymbol);// pointer id
if( baseType.isPointer() ) {
DataType elementType = baseType; elementType.pointers--;
if( $1 == '+' )
translator.emit(Taco(OP_PLUS,retSymbol.id,retSymbol.id,std::to_string(elementType.getSize())));// ret = ret+sz
else
translator.emit(Taco(OP_MINUS,retSymbol.id,retSymbol.id,std::to_string(elementType.getSize())));// ret = ret-sz
} else if( baseType == MM_CHAR_TYPE or baseType == MM_INT_TYPE or baseType == MM_DOUBLE_TYPE ) {// basic types
if( $1 == '+' ) translator.emit(Taco(OP_PLUS,retSymbol.id,retSymbol.id,"1"));// ret = ret+1
else translator.emit(Taco(OP_MINUS,retSymbol.id,retSymbol.id,"1"));// ret = ret-1
} else {
throw syntax_error(@2 , "Invalid operand.");
}
translator.emit(Taco(OP_L_DEREF,pointerId.id,retSymbol.id));//copy back : *ptr = new
} else {
throw syntax_error(@1,"Invalid operand.");
}
$$.isReference = false;
} else {
throw syntax_error(@1,"Invalid operand.");
}
} |
unary_operator unary_expression {
std::swap($$,$2);// copy all
DataType rType = translator.getSymbol($$.symbol).type;
switch($1) {
case '&' : {
if( $$.isReference ) {
if( translator.isSimpleReference($$) ) { // just take reference
if( rType.isMatrix() ) {
throw syntax_error(@2,"Invalid matrix operand.");
}
DataType pointerType = rType; pointerType.pointers++;
SymbolRef retRef = translator.genTemp(pointerType);
Symbol & retSymbol = translator.getSymbol(retRef);
Symbol & RHS = translator.getSymbol($$.symbol);
translator.emit(Taco(OP_REFER,retSymbol.id,RHS.id));
$$.symbol = retRef;
} else if( translator.isMatrixReference($$) ) {
DataType pointerType = MM_DOUBLE_TYPE; pointerType.pointers++;
SymbolRef retRef = translator.genTemp(pointerType);
Symbol & retSymbol = translator.getSymbol(retRef);
Symbol & RHS = translator.getSymbol($$.symbol);
Symbol & auxSymbol = translator.getSymbol($$.auxSymbol);
translator.emit(Taco(OP_PLUS,retSymbol.id,RHS.id,auxSymbol.id));// base + offset
$$.symbol = retRef;
} else if( translator.isPointerReference($$) ) {
$$.symbol = $$.auxSymbol; // take back pointer
} else {
throw syntax_error(@2,"Invalid operand.");
}
} else {
throw syntax_error(@$,"Attempting to take reference of non-l-value.");
}
$$.isReference = false;
} break;
case '*' : {
if( rType.isPointer() ) {
DataType elementType = rType; elementType.pointers--;
if( elementType == MM_VOID_TYPE ) {
throw syntax_error(@$,"Cannot dereference pointer to void type object.");
}
SymbolRef retRef = translator.genTemp(elementType);
Symbol & retSymbol = translator.getSymbol(retRef);
Symbol & RHS = translator.getSymbol($$.symbol);
translator.emit(Taco(OP_R_DEREF,retSymbol.id,RHS.id));
$$.auxSymbol = $$.symbol;
$$.symbol = retRef;
$$.isReference = true;
} else {
throw syntax_error(@$,"Attempting to dereference non-pointer type.");
}
} break;
case '+' : {
if( $$.isReference ) {
if( translator.isSimpleReference($$) ) {
if( rType.isMatrix() ) {
DataType matType = MM_MATRIX_TYPE;
SymbolRef retRef = translator.genTemp(matType);
Symbol & retSym = translator.getSymbol(retRef);
Symbol & matSym = translator.getSymbol($$.symbol);
translator.emit(Taco(OP_ALLOC,retSym.id,matSym.id)); // DogeMaster
translator.emit(Taco(OP_COPY,retSym.id,matSym.id));// ret = +m
$$.symbol = retRef;
$$.isReference = false;
} else if( rType ==MM_CHAR_TYPE or rType ==MM_INT_TYPE or rType ==MM_DOUBLE_TYPE ) {
SymbolRef retRef = translator.genTemp(rType);
Symbol & retSymbol = translator.getSymbol(retRef);
Symbol & RHS = translator.getSymbol($$.symbol);
translator.emit(Taco(OP_COPY,retSymbol.id,RHS.id));
if( RHS.isInitialized ) {
retSymbol.isInitialized = true;
if( rType == MM_CHAR_TYPE ) retSymbol.value.charVal = RHS.value.charVal;
else if( rType == MM_INT_TYPE ) retSymbol.value.intVal = RHS.value.intVal;
else if( rType == MM_DOUBLE_TYPE ) retSymbol.value.doubleVal = RHS.value.doubleVal;
}
$$.symbol = retRef;
}
} else if( translator.isMatrixReference($$) ) {
DataType elementType = MM_DOUBLE_TYPE;
SymbolRef retRef = translator.genTemp(elementType);
Symbol & retSymbol = translator.getSymbol(retRef);
Symbol & auxSymbol = translator.getSymbol($$.auxSymbol);
Symbol & RHS = translator.getSymbol($$.symbol);
translator.emit(Taco(OP_RXC,retSymbol.id,RHS.id,auxSymbol.id));// ret = m[off]
$$.symbol = retRef;
} else if( translator.isPointerReference($$) ) {//for pointer reference, just lower flag
} else {
throw syntax_error(@2,"Invalid operand.");
}
$$.isReference = false;
} else {
if( rType == MM_VOID_TYPE ) { // allow any rvalue except void type
throw syntax_error(@2,"Invalid operand.");
}
}
} break;
case '-' : {
if( $$.isReference ) {
if( translator.isSimpleReference($$) ) {
if( rType.isMatrix() ) {
DataType matType = MM_MATRIX_TYPE;
SymbolRef retRef = translator.genTemp(matType);
Symbol & retSym = translator.getSymbol(retRef);
Symbol & matSym = translator.getSymbol($$.symbol);
translator.emit(Taco(OP_ALLOC,retSym.id,matSym.id)); // DogeMaster
translator.emit(Taco(OP_UMINUS,retSym.id,matSym.id));// ret = -m
$$.symbol = retRef;
$$.isReference = false;
} else if( rType == MM_CHAR_TYPE or rType == MM_INT_TYPE or rType == MM_DOUBLE_TYPE ) {
SymbolRef retRef = translator.genTemp(rType);
Symbol & retSymbol = translator.getSymbol(retRef);
Symbol & RHS = translator.getSymbol($$.symbol);
if( RHS.isInitialized ) {
retSymbol.isInitialized = true;
if( rType == MM_CHAR_TYPE ) retSymbol.value.charVal = -RHS.value.charVal;
else if( rType == MM_INT_TYPE ) retSymbol.value.intVal = -RHS.value.intVal;
else if( rType == MM_DOUBLE_TYPE ) retSymbol.value.doubleVal = -RHS.value.doubleVal;
}
translator.emit(Taco(OP_UMINUS,retSymbol.id,RHS.id));
$$.symbol = retRef;
}
} else if( translator.isMatrixReference($$) ) {
DataType elementType = MM_DOUBLE_TYPE;
SymbolRef retRef = translator.genTemp(elementType);
Symbol & retSymbol = translator.getSymbol(retRef);
Symbol & auxSymbol = translator.getSymbol($$.auxSymbol);
Symbol & RHS = translator.getSymbol($$.symbol);
translator.emit(Taco(OP_RXC,retSymbol.id,RHS.id,auxSymbol.id));// ret = m[off]
translator.emit(Taco(OP_UMINUS,retSymbol.id,retSymbol.id));
$$.symbol = retRef;
} else if( translator.isPointerReference($$) ) {
throw syntax_error(@$ , "Unary minus on pointer not allowed." );
} else {
throw syntax_error(@2,"Invalid operand.");
}
$$.isReference = false;
} else if( rType.isPointer() ) {
throw syntax_error(@$ , "Unary minus on pointer not allowed." );
} else if( rType.isMatrix() ) {
Symbol & RHS = translator.getSymbol($$.symbol);
translator.emit(Taco(OP_UMINUS,RHS.id,RHS.id)); // Not DogeMaster
} else if( rType == MM_CHAR_TYPE or rType == MM_INT_TYPE or rType == MM_DOUBLE_TYPE ){
Symbol & RHS = translator.getSymbol($$.symbol);
translator.emit(Taco(OP_UMINUS,RHS.id,RHS.id));//
if( RHS.isInitialized ) {
if( rType == MM_CHAR_TYPE ) RHS.value.charVal = -RHS.value.charVal;
else if( rType == MM_INT_TYPE ) RHS.value.intVal = -RHS.value.intVal;
else if( rType == MM_DOUBLE_TYPE ) RHS.value.doubleVal = -RHS.value.doubleVal;
}
} else {
throw syntax_error(@$,"Invalid operand.");
}
} break;
case '~' : {
SymbolRef RHR = getIntegerBinaryOperand(translator,*this,@2,$$);
SymbolRef retRef ;
Symbol & RHS = translator.getSymbol(RHR);
if( translator.isTemporary(RHR) ) retRef = RHR;
else retRef = translator.genTemp(RHS.type);
Symbol & retSym = translator.getSymbol(retRef);
Symbol & CRHS = translator.getSymbol(RHR);
translator.emit(Taco(OP_BIT_NOT,retSym.id,CRHS.id));// ret = ~rhs
retSym.isInitialized = CRHS.isInitialized;
retSym.isConstant = CRHS.isConstant ;
if( retSym.isConstant ) {
retSym.symType = SymbolType::CONST;
}
if( retSym.isInitialized ) {
if( rType == MM_CHAR_TYPE ) {
retSym.value.charVal = ~CRHS.value.charVal;
} else if( rType == MM_INT_TYPE ) {
retSym.value.intVal = ~CRHS.value.intVal ;
}
}
$$.symbol = retRef;
$$.isReference = false;
} break;
case '!' : {
if( !$$.isBoolean ) {
throw syntax_error(@1,"Non boolean expression.");
}
std::swap($$.trueList,$$.falseList);
} break;
default: throw syntax_error(@$ , "Unknown unary operator.");
}
} ;
%type <char> unary_operator;
unary_operator : "&" { $$ = '&'; } |"*" { $$ = '*'; } |"~" { $$='~';} |"+" { $$ = '+'; } |"-" { $$ = '-'; }|"!" { $$ = '!'; };
%type <Expression> cast_expression;
cast_expression : unary_expression { std::swap($$,$1); } |
"(" type_specifier optional_pointer { translator.typeContext.pop(); } ")" cast_expression {
dereference(translator,$6);
DataType castType = $2; castType.pointers += $3;
DataType baseType = translator.getSymbol($6.symbol).type;
if( castType.isPointer() and baseType.isPointer() ) { // can convert from pointers to pointers
if( castType != baseType ) {
SymbolRef retRef = translator.genTemp(castType);
Symbol & retSym = translator.getSymbol(retRef);
Symbol & RHS = translator.getSymbol($6.symbol);
translator.emit(Taco(OP_COPY,retSym.id,RHS.id));
$$.symbol = retRef; $$.isReference = false;
} else {
std::swap($$,$6);
}
} else { // ... can convert between scalars using typeCheck
SymbolRef retRef = typeCheck($6.symbol,castType,true,translator,*this,@6);
$$.symbol = retRef; $$.isReference = false;
}
} ;
%type <Expression> multiplicative_expression;
multiplicative_expression :
cast_expression {
std::swap($$,$1);
} | multiplicative_expression mul_div_op cast_expression { // mul_div_op produces `*' or `/'
bool lMat = translator.isMatrixOperand($1) , rMat = translator.isMatrixOperand($3);
if( !lMat and !rMat ) {
emitScalarBinaryOperation($2,translator,*this,$$,$1,$3,@$,@1,@3);
} else {
if( rMat ) { // only multiplication
if( $2 == '/' ) throw syntax_error(@$,"Invalid operand.");
if( !lMat ) { // scalar * matrix
SymbolRef mulRef = getScalarBinaryOperand(translator,*this,@1,$1);
DataType coeffType = MM_DOUBLE_TYPE;
mulRef = typeCheck(mulRef,coeffType,true,translator,*this,@1);
SymbolRef retRef = $3.symbol;
if( !translator.isTemporary(retRef) ) {
DataType matType = MM_MATRIX_TYPE;
retRef = translator.genTemp(matType);
Symbol & retSym = translator.getSymbol(retRef);
Symbol & matSym = translator.getSymbol($3.symbol);
translator.emit(Taco(OP_ALLOC,retSym.id,matSym.id)); // DogeMaster
}
Symbol & mulSym = translator.getSymbol(mulRef);
Symbol & matSym = translator.getSymbol($3.symbol);
Symbol & retSym = translator.getSymbol(retRef);
translator.emit(Taco(OP_MULT,retSym.id,matSym.id,mulSym.id));
$$.symbol = retRef;
} else { // matrix * matrix
SymbolRef LHR = $1.symbol , RHR = $3.symbol;
DataType retType = MM_MATRIX_TYPE;
SymbolRef retRef = translator.genTemp(retType);
Symbol & lSym = translator.getSymbol(LHR);
Symbol & rSym = translator.getSymbol(RHR);
Symbol & retSym = translator.getSymbol(retRef);
translator.emit(Taco(OP_ALLOC,retSym.id,lSym.id,rSym.id)); // DogeMaster
translator.emit(Taco(OP_MULT,retSym.id,lSym.id,rSym.id));
$$.symbol = retRef;
}
} else { // matrix * / scalar
SymbolRef mulRef = getScalarBinaryOperand(translator,*this,@3,$3);
DataType coeffType = MM_DOUBLE_TYPE;
mulRef = typeCheck(mulRef,coeffType,true,translator,*this,@3);
SymbolRef retRef = $1.symbol;
if( !translator.isTemporary(retRef) ) {
DataType matType = MM_MATRIX_TYPE;
retRef = translator.genTemp(matType);
Symbol & retSym = translator.getSymbol(retRef);
Symbol & matSym = translator.getSymbol($1.symbol);
translator.emit(Taco(OP_ALLOC,retSym.id,matSym.id)); // DogeMaster
}
Symbol & mulSym = translator.getSymbol(mulRef);
Symbol & matSym = translator.getSymbol($1.symbol);
Symbol & retSym = translator.getSymbol(retRef);
if( $2 == '*' ) translator.emit(Taco(OP_MULT,retSym.id,matSym.id,mulSym.id));
else translator.emit(Taco(OP_DIV,retSym.id,matSym.id,mulSym.id));
$$.symbol = retRef;
}
}
} | multiplicative_expression "%" cast_expression {
emitIntegerBinaryOperation('%',translator,*this,$$,$1,$3,@$,@1,@3);
} ;
%type <char> mul_div_op;
mul_div_op : "*" { $$ = '*'; } | "/" { $$ = '/'; }
%type <Expression> additive_expression;
additive_expression :
multiplicative_expression {
std::swap($$,$1);
} | additive_expression add_sub_op multiplicative_expression { // add_sub op produces `+' or `-'
DataType lType = translator.getSymbol($1.symbol).type;
DataType rType = translator.getSymbol($3.symbol).type;
if( lType.isPointer() or rType.isPointer() ) {
if( lType.isPointer() and rType.isPointer() ) {
throw syntax_error(@$,"Illegal pointer arithmetic.");
}
if( lType.isPointer() ) {
SymbolRef intRef = getIntegerBinaryOperand(translator,*this,@3,$3);
SymbolRef offsetRef;
if( !translator.isTemporary(intRef) ){
offsetRef = translator.genTemp(rType);
Symbol & offsetSymbol = translator.getSymbol(offsetRef);
Symbol &baseSymbol = translator.getSymbol($3.symbol);
translator.emit(Taco(OP_COPY,offsetSymbol.id,baseSymbol.id));
} else offsetRef = intRef;
SymbolRef retRef = $1.symbol;
if( !translator.isTemporary(retRef) ) {
retRef = translator.genTemp(lType);
Symbol &retSymbol = translator.getSymbol(retRef);
Symbol &baseSymbol = translator.getSymbol($1.symbol);
translator.emit(Taco(OP_COPY,retSymbol.id,baseSymbol.id));
}
Symbol & offsetSym = translator.getSymbol(offsetRef);
Symbol & pointerSym = translator.getSymbol(retRef);
DataType elemType = lType; elemType.pointers--;
translator.emit(Taco(OP_MULT,offsetSym.id,offsetSym.id,std::to_string(elemType.getSize())));
if( $2 == '+' ) translator.emit(Taco(OP_PLUS,pointerSym.id,pointerSym.id,offsetSym.id));
else translator.emit(Taco(OP_MINUS,pointerSym.id,pointerSym.id,offsetSym.id));
$$.symbol = retRef;
} else {// rType.isPointer()
SymbolRef intRef = getIntegerBinaryOperand(translator,*this,@1,$1);
SymbolRef offsetRef;
if( !translator.isTemporary(intRef) ){
offsetRef = translator.genTemp(lType);
Symbol & offsetSymbol = translator.getSymbol(offsetRef);
Symbol &baseSymbol = translator.getSymbol($1.symbol);
translator.emit(Taco(OP_COPY,offsetSymbol.id,baseSymbol.id));
} else offsetRef = intRef;
SymbolRef retRef = $3.symbol;
if( !translator.isTemporary(retRef) ) {
retRef = translator.genTemp(rType);
Symbol &retSymbol = translator.getSymbol(retRef);
Symbol &baseSymbol = translator.getSymbol($3.symbol);
translator.emit(Taco(OP_COPY,retSymbol.id,baseSymbol.id));
}
Symbol & offsetSym = translator.getSymbol(offsetRef);
Symbol & pointerSym = translator.getSymbol(retRef);
DataType elemType = rType; elemType.pointers--;
translator.emit(Taco(OP_MULT,offsetSym.id,offsetSym.id,std::to_string(elemType.getSize())));
if( $2 == '+' ) translator.emit(Taco(OP_PLUS,pointerSym.id,pointerSym.id,offsetSym.id));
else throw syntax_error(@$,"Invalid operands. Pointer cannot be negated.");
$$.symbol = retRef;
}
$$.isReference = false;
} else {
bool lMat = translator.isMatrixOperand($1) , rMat = translator.isMatrixOperand($3);
if( lMat and rMat ) {
SymbolRef LHR = $1.symbol , RHR = $3.symbol;
bool lTemp = translator.isTemporary(LHR) , rTemp = translator.isTemporary(RHR) ;
SymbolRef retRef;
if(!lTemp and !rTemp) {
DataType matType = MM_MATRIX_TYPE;
retRef = translator.genTemp(matType);
Symbol & lSym = translator.getSymbol(LHR);
Symbol & rSym = translator.getSymbol(RHR);
Symbol & retSym = translator.getSymbol(retRef);
translator.emit(Taco(OP_ALLOC,retSym.id,lSym.id)); // DogeMaster
} else {
if( lTemp ) retRef = LHR;
else retRef = RHR;
}
Symbol & lSym = translator.getSymbol(LHR);
Symbol & rSym = translator.getSymbol(RHR);
Symbol & retSym = translator.getSymbol(retRef);
if($2 == '+') translator.emit(Taco(OP_PLUS,retSym.id,lSym.id,rSym.id));
else translator.emit(Taco(OP_MINUS,retSym.id,lSym.id,rSym.id));
$$.symbol = retRef;
} else if( !lMat and !rMat ) {
emitScalarBinaryOperation($2,translator,*this,$$,$1,$3,@$,@1,@3);
} else {
throw syntax_error(@$,"Invalid operands.");
}
}
} ;
%type <char> add_sub_op;
add_sub_op : "+" { $$ = '+'; } | "-" { $$ = '-'; } ;
%type <Expression> shift_expression;
shift_expression : additive_expression { std::swap($$,$1); }
| shift_expression bit_shift_op additive_expression {emitIntegerBinaryOperation($2,translator,*this,$$,$1,$3,@$,@1,@3);} ;
%type <char> bit_shift_op;
bit_shift_op : "<<" { $$ = '<'; } | ">>" { $$ = '>'; } ;
/* TODO : Add condition checking for pointers. */
%type <Expression> relational_expression equality_expression;
relational_expression : shift_expression { std::swap($$,$1); }
| relational_expression rel_op shift_expression {
Symbol & lSym = translator.getSymbol($1.symbol);
Symbol & rSym = translator.getSymbol($3.symbol);
bool lPtr = lSym.type.isPointer() , rPtr = lSym.type.isPointer() ;
if( lPtr and rPtr ) {
if( lSym.type != rSym.type ) {
translator.error(@$,"Warning : pointer type mismatch while comparison.");
}
OpCode opCode;
switch ( $2 ) {
case '<' : opCode = OP_LT ; break;
case '>' : opCode = OP_GT ; break;
case '(' : opCode = OP_LTE ; break;
case ')' : opCode = OP_GTE ; break;
default:break;
}
$$.isBoolean = true;
$$.trueList.push_back( translator.nextInstruction() );
translator.emit(Taco(opCode,"",lSym.id,rSym.id));
$$.falseList.push_back( translator.nextInstruction() );
translator.emit(Taco(OP_GOTO,""));
} else if( !lPtr and !rPtr ) {
emitConditionOperation($2,translator,*this,$$,$1,$3,@$,@1,@3);
} else {
throw syntax_error(@$,"Invalid comparison of pointers.");
}
} ;
equality_expression : relational_expression { std::swap($$,$1); }
| equality_expression eq_op relational_expression {
Symbol & lSym = translator.getSymbol($1.symbol);
Symbol & rSym = translator.getSymbol($3.symbol);
bool lPtr = lSym.type.isPointer() , rPtr = lSym.type.isPointer() ;
if( lPtr and rPtr ) {
if( lSym.type != lSym.type ) {
translator.error(@$,"Warning : pointer type mismatch while comparison.");
}
OpCode opCode;
switch ( $2 ) {
case '=' : opCode = OP_EQ ; break;
case '!' : opCode = OP_NEQ ; break;
default:break;
}
$$.isBoolean = true;
$$.trueList.push_back( translator.nextInstruction() );
translator.emit(Taco(opCode,"",lSym.id,rSym.id));
$$.falseList.push_back( translator.nextInstruction() );
translator.emit(Taco(OP_GOTO,""));
} else if( !lPtr and !rPtr ) {
emitConditionOperation($2,translator,*this,$$,$1,$3,@$,@1,@3);
} else {
throw syntax_error(@$,"Invalid comparison of pointers.");
}
} ;
%type <char> rel_op eq_op;
rel_op : "<" { $$ = '<'; } | ">" { $$ = '>'; } | "<=" { $$ ='('; } | ">=" { $$ = ')'; } ;
eq_op : "==" { $$ = '='; } | "!=" { $$ = '!'; } ;
%type <Expression> AND_expression XOR_expression OR_expression;
AND_expression : equality_expression { std::swap($$,$1); }
| AND_expression "&" equality_expression {emitIntegerBinaryOperation('&',translator,*this,$$,$1,$3,@$,@1,@3);} ;
XOR_expression : AND_expression { std::swap($$,$1); }
| XOR_expression "^" AND_expression {emitIntegerBinaryOperation('^',translator,*this,$$,$1,$3,@$,@1,@3);} ;
OR_expression : XOR_expression { std::swap($$,$1);}
| OR_expression "|" XOR_expression {emitIntegerBinaryOperation('|',translator,*this,$$,$1,$3,@$,@1,@3);} ;
%type <unsigned int> instruction_mark;
instruction_mark : %empty { $$ = translator.nextInstruction(); } ;
%type <Expression> logical_AND_expression;
logical_AND_expression :
OR_expression {
std::swap($$,$1);
} | logical_AND_expression "&&" instruction_mark OR_expression {
if( !$1.isBoolean ) throw syntax_error(@1,"Non boolean operand.");
if( !$4.isBoolean ) throw syntax_error(@4,"Non boolean operand.");
translator.patchBack($1.trueList,$3);
std::swap($$.trueList,$4.trueList);// constant time
$$.falseList.splice($$.falseList.end(),$1.falseList);
$$.falseList.splice($$.falseList.end(),$4.falseList);
$$.isBoolean = true;
} ;
%type <Expression> logical_OR_expression;
logical_OR_expression :
logical_AND_expression {
std::swap($$,$1);
} | logical_OR_expression "||" instruction_mark logical_AND_expression {
if( !$1.isBoolean ) throw syntax_error(@1,"Non boolean operand.");
if( !$4.isBoolean ) throw syntax_error(@4,"Non boolean operand.");
translator.patchBack($1.falseList,$3);
std::swap($$.falseList,$4.falseList);// constant time
$$.trueList.splice($$.trueList.end(),$1.trueList);
$$.trueList.splice($$.trueList.end(),$4.trueList);
$$.isBoolean = true;
} ;
%type <unsigned int> insert_jump;
insert_jump : %empty {
translator.emit(Taco(OP_GOTO));
$$ = translator.nextInstruction();
} ;
%type <Expression> conditional_expression;
conditional_expression :
logical_OR_expression {
std::swap($$,$1);
} | logical_OR_expression instruction_mark "?" expression insert_jump ":" expression {
if( !$1.isBoolean ) throw syntax_error(@1,"Non boolean question.");
translator.patchBack($1.trueList,$2); // on the mark
translator.patchBack($1.falseList,$5); // after the jump
int nextInstruction = translator.nextInstruction();
translator.patchBack($5-1,nextInstruction);
translator.patchBack($4.trueList,nextInstruction);
translator.patchBack($4.falseList,nextInstruction);// link totally
translator.patchBack($7.trueList,translator.nextInstruction());
translator.patchBack($7.falseList,translator.nextInstruction());// link totally
DataType retType = MM_VOID_TYPE;// generate void dummy to avoid misuse of this expression
SymbolRef retRef = translator.genTemp(retType);
$$.symbol = retRef;
} ;