void hie0 (ExprDesc *lval);
/* Parse comma operator. */
-void expr (void (*Func) (ExprDesc*), ExprDesc *Expr);
-/* Expression parser; func is either hie0 or hie1. */
-
/*****************************************************************************/
-static unsigned GlobalModeFlags (unsigned flags)
+static unsigned GlobalModeFlags (unsigned Flags)
/* Return the addressing mode flags for the variable with the given flags */
{
- flags &= E_MCTYPE;
- if (flags == E_TGLAB) {
- /* External linkage */
- return CF_EXTERNAL;
- } else if (flags == E_TREGISTER) {
- /* Register variable */
- return CF_REGVAR;
- } else {
- /* Static */
- return CF_STATIC;
+ switch (Flags & E_MASK_LOC) {
+ case E_LOC_GLOBAL: return CF_EXTERNAL;
+ case E_LOC_STATIC: return CF_STATIC;
+ case E_LOC_REGISTER: return CF_REGVAR;
+ default:
+ Internal ("GlobalModeFlags: Invalid flags value: %u", Flags);
}
}
-static int IsNullPtr (ExprDesc* lval)
-/* Return true if this is the NULL pointer constant */
+static void ExprWithCheck (void (*Func) (ExprDesc*), ExprDesc *Expr)
+/* Call an expression function with checks. */
{
- return (IsClassInt (lval->Type) && /* Is it an int? */
- lval->Flags == E_MCONST && /* Is it constant? */
- lval->ConstVal == 0); /* And is it's value zero? */
+ /* Remember the stack pointer */
+ int OldSP = StackPtr;
+
+ /* Call the expression function */
+ (*Func) (Expr);
+
+ /* Do some checks if code generation is still constistent */
+ if (StackPtr != OldSP) {
+ if (Debug) {
+ fprintf (stderr,
+ "Code generation messed up!\n"
+ "StackPtr is %d, should be %d",
+ StackPtr, OldSP);
+ } else {
+ Internal ("StackPtr is %d, should be %d\n", StackPtr, OldSP);
+ }
+ }
}
/* Generate type adjustment code if needed */
ltype = TypeOf (lhst);
- if (lhs->Flags == E_MCONST) {
+ if (ED_IsLocAbs (lhs)) {
ltype |= CF_CONST;
}
if (NoPush) {
ltype |= CF_REG;
}
rtype = TypeOf (rhst);
- if (rhs->Flags == E_MCONST) {
+ if (ED_IsLocAbs (rhs)) {
rtype |= CF_CONST;
}
flags = g_typeadjust (ltype, rtype);
void DefineData (ExprDesc* Expr)
/* Output a data definition for the given expression */
{
- unsigned Flags = Expr->Flags;
+ switch (ED_GetLoc (Expr)) {
- switch (Flags & E_MCTYPE) {
+ case E_LOC_ABS:
+ /* Absolute: numeric address or const */
+ g_defdata (TypeOf (Expr->Type) | CF_CONST, Expr->Val, 0);
+ break;
- case E_TCONST:
- /* Number */
- g_defdata (TypeOf (Expr->Type) | CF_CONST, Expr->ConstVal, 0);
- break;
+ case E_LOC_GLOBAL:
+ /* Global variable */
+ g_defdata (CF_EXTERNAL, Expr->Name, Expr->Val);
+ break;
+
+ case E_LOC_STATIC:
+ /* Static variable */
+ g_defdata (CF_STATIC, Expr->Name, Expr->Val);
+ break;
- case E_TREGISTER:
+ case E_LOC_REGISTER:
/* Register variable. Taking the address is usually not
* allowed.
*/
if (IS_Get (&AllowRegVarAddr) == 0) {
Error ("Cannot take the address of a register variable");
}
- /* FALLTHROUGH */
-
- case E_TGLAB:
- case E_TLLAB:
- /* Local or global symbol */
- g_defdata (GlobalModeFlags (Flags), Expr->Name, Expr->ConstVal);
- break;
+ g_defdata (CF_REGVAR, Expr->Name, Expr->Val);
+ break;
- case E_TLIT:
- /* a literal of some kind */
- g_defdata (CF_STATIC, LiteralPoolLabel, Expr->ConstVal);
- break;
+ case E_LOC_LITERAL:
+ /* Literal in the literal pool */
+ g_defdata (CF_STATIC, LiteralPoolLabel, Expr->Val);
+ break;
default:
- Internal ("Unknown constant type: %04X", Flags);
+ Internal ("Unknown constant type: 0x%04X", ED_GetLoc (Expr));
}
}
static void LoadConstant (unsigned Flags, ExprDesc* Expr)
/* Load the primary register with some constant value. */
{
- switch (Expr->Flags & E_MCTYPE) {
+ switch (ED_GetLoc (Expr)) {
- case E_TLOFFS:
- g_leasp (Expr->ConstVal);
- break;
-
- case E_TCONST:
+ case E_LOC_ABS:
/* Number constant */
- g_getimmed (Flags | TypeOf (Expr->Type) | CF_CONST, Expr->ConstVal, 0);
+ g_getimmed (Flags | TypeOf (Expr->Type) | CF_CONST, Expr->Val, 0);
+ break;
+
+ case E_LOC_GLOBAL:
+ /* Global symbol, load address */
+ g_getimmed ((Flags | CF_EXTERNAL) & ~CF_CONST, Expr->Name, Expr->Val);
break;
- case E_TREGISTER:
+ case E_LOC_STATIC:
+ /* Static symbol, load address */
+ g_getimmed ((Flags | CF_STATIC) & ~CF_CONST, Expr->Name, Expr->Val);
+ break;
+
+ case E_LOC_REGISTER:
/* Register variable. Taking the address is usually not
* allowed.
*/
if (IS_Get (&AllowRegVarAddr) == 0) {
Error ("Cannot take the address of a register variable");
}
- /* FALLTHROUGH */
-
- case E_TGLAB:
- case E_TLLAB:
- /* Local or global symbol, load address */
- Flags |= GlobalModeFlags (Expr->Flags);
- Flags &= ~CF_CONST;
- g_getimmed (Flags, Expr->Name, Expr->ConstVal);
- break;
+ g_getimmed ((Flags | CF_REGVAR) & ~CF_CONST, Expr->Name, Expr->Val);
- case E_TLIT:
+ case E_LOC_STACK:
+ g_leasp (Expr->Val);
+ break;
+
+ case E_LOC_LITERAL:
/* Literal string */
- g_getimmed (CF_STATIC, LiteralPoolLabel, Expr->ConstVal);
+ g_getimmed (CF_STATIC, LiteralPoolLabel, Expr->Val);
break;
default:
/* There's a type waiting if:
*
- * 1. We have an opening paren, and
- * a. the next token is a type, or
- * b. the next token is a type qualifier, or
- * c. the next token is a typedef'd type
+ * We have an opening paren, and
+ * a. the next token is a type, or
+ * b. the next token is a type qualifier, or
+ * c. the next token is a typedef'd type
*/
return CurTok.Tok == TOK_LPAREN && (
TokIsType (&NextTok) ||
-void PushAddr (ExprDesc* Expr)
+void PushAddr (const ExprDesc* Expr)
/* If the expression contains an address that was somehow evaluated,
* push this address on the stack. This is a helper function for all
* sorts of implicit or explicit assignment functions where the lvalue
*/
{
/* Get the address on stack if needed */
- if (Expr->Flags != E_MREG && (Expr->Flags & E_MEXPR)) {
+ if (ED_IsLocExpr (Expr)) {
/* Push the address (always a pointer) */
g_push (CF_PTR, 0);
}
-void ConstSubExpr (void (*Func) (ExprDesc*), ExprDesc* Expr)
-/* Will evaluate an expression via the given function. If the result is not
- * a constant, a diagnostic will be printed, and the value is replaced by
- * a constant one to make sure there are no internal errors that result
- * from this input error.
- */
-{
- Func (InitExprDesc (Expr));
- if (ED_IsLVal (Expr) != 0 || Expr->Flags != E_MCONST) {
- Error ("Constant expression expected");
- /* To avoid any compiler errors, make the expression a valid const */
- ED_MakeConstInt (Expr, 1);
- }
-}
-
-
-
-void CheckBoolExpr (ExprDesc* Expr)
-/* Check if the given expression is a boolean expression, output a diagnostic
- * if not.
- */
-{
- /* If it's an integer, it's ok. If it's not an integer, but a pointer,
- * the pointer used in a boolean context is also ok
- */
- if (!IsClassInt (Expr->Type) && !IsClassPtr (Expr->Type)) {
- Error ("Boolean expression expected");
- /* To avoid any compiler errors, make the expression a valid int */
- ED_MakeConstInt (Expr, 1);
- }
-}
-
-
-
/*****************************************************************************/
/* code */
/*****************************************************************************/
* already there.
*/
{
- int f;
-
- f = Expr->Flags;
if (ED_IsLVal (Expr)) {
+
/* Dereferenced lvalue */
Flags |= TypeOf (Expr->Type);
if (Expr->Test & E_FORCETEST) {
Flags |= CF_TEST;
Expr->Test &= ~E_FORCETEST;
}
- if (f & E_MGLOBAL) {
- /* Reference to a global variable */
- Flags |= GlobalModeFlags (f);
- g_getstatic (Flags, Expr->Name, Expr->ConstVal);
- } else if (f & E_MLOCAL) {
- /* Reference to a local variable */
- g_getlocal (Flags, Expr->ConstVal);
- } else if (f & E_MCONST) {
- /* Reference to an absolute address */
- g_getstatic (Flags | CF_ABSOLUTE, Expr->ConstVal, 0);
- } else if (f == E_MEOFFS) {
- /* Reference to address in primary with offset in Expr */
- g_getind (Flags, Expr->ConstVal);
- } else if (f != E_MREG) {
- /* Reference with address in primary */
- g_getind (Flags, 0);
- } else if (Flags & CF_TEST) {
- /* The value is already in the primary but needs a test */
- g_test (Flags);
+
+ switch (ED_GetLoc (Expr)) {
+
+ case E_LOC_ABS:
+ /* Absolute: numeric address or const */
+ g_getstatic (Flags | CF_ABSOLUTE, Expr->Val, 0);
+ break;
+
+ case E_LOC_GLOBAL:
+ /* Global variable */
+ g_getstatic (Flags | CF_EXTERNAL, Expr->Name, Expr->Val);
+ break;
+
+ case E_LOC_STATIC:
+ /* Static variable */
+ g_getstatic (Flags | CF_STATIC, Expr->Name, Expr->Val);
+ break;
+
+ case E_LOC_REGISTER:
+ /* Register variable */
+ g_getstatic (Flags | CF_REGVAR, Expr->Name, Expr->Val);
+ break;
+
+ case E_LOC_STACK:
+ /* Value on the stack */
+ g_getlocal (Flags, Expr->Val);
+ break;
+
+ case E_LOC_PRIMARY:
+ /* The primary register - just test if necessary */
+ if (Flags & CF_TEST) {
+ g_test (Flags);
+ }
+ break;
+
+ case E_LOC_EXPR:
+ /* Reference to address in primary with offset in Expr */
+ g_getind (Flags, Expr->Val);
+ break;
+
+ case E_LOC_LITERAL:
+ /* Literal in the literal pool */
+ g_getstatic (Flags | CF_STATIC, LiteralPoolLabel, Expr->Val);
+ break;
+
+ default:
+ Internal ("Invalid location in ExprLoad: 0x%04X", ED_GetLoc (Expr));
}
+
} else {
/* An rvalue */
- if (f == E_MEOFFS) {
- /* reference not storable */
- Flags |= TypeOf (Expr->Type);
- g_inc (Flags | CF_CONST, Expr->ConstVal);
- } else if ((f & E_MEXPR) == 0) {
+ if (ED_IsLocExpr (Expr)) {
+ if (Expr->Val != 0) {
+ /* We have an expression in the primary plus a constant
+ * offset. Adjust the value in the primary accordingly.
+ */
+ Flags |= TypeOf (Expr->Type);
+ g_inc (Flags | CF_CONST, Expr->Val);
+ }
+ } else {
/* Constant of some sort, load it into the primary */
LoadConstant (Flags, Expr);
}
Expr->Test &= ~E_FORCETEST;
}
}
+
+#if 0
+ /* Regardless of the original contents, Expr is now an rvalue in the
+ * primary. ### Later...
+ */
+ ED_MakeRValExpr (Expr);
+#endif
}
/* Do we have more than one parameter in the frame? */
if (FrameParams > 1) {
/* Okeydokey, setup the frame */
- FrameOffs = oursp;
+ FrameOffs = StackPtr;
g_space (FrameSize);
- oursp -= FrameSize;
+ StackPtr -= FrameSize;
} else {
/* Don't use a preallocated frame */
FrameSize = 0;
}
/* Evaluate the parameter expression */
- hie1 (InitExprDesc (&Expr));
+ hie1 (&Expr);
/* If we don't have an argument spec, accept anything, otherwise
* convert the actual argument to the type needed.
}
FrameOffs -= ArgSize;
/* Store */
- g_putlocal (Flags | CF_NOKEEP, FrameOffs, Expr.ConstVal);
+ g_putlocal (Flags | CF_NOKEEP, FrameOffs, Expr.Val);
} else {
/* Push the argument */
- g_push (Flags, Expr.ConstVal);
+ g_push (Flags, Expr.Val);
}
/* Calculate total parameter size */
* For fastcall functions we do also need to place a copy of the
* pointer on stack, since we cannot use a/x.
*/
- PtrOnStack = IsFastCall || ((Expr->Flags & (E_MGLOBAL | E_MLOCAL)) == 0);
+ PtrOnStack = IsFastCall || !ED_IsConst (Expr);
if (PtrOnStack) {
/* Not a global or local variable, or a fastcall function. Load
* the pointer into the primary and mark it as an expression.
*/
ExprLoad (CF_NONE, Expr);
- Expr->Flags |= E_MEXPR;
+ ED_MakeRValExpr (Expr);
/* Remember the code position */
Mark = GetCodePos ();
/* Push the pointer onto the stack and remember the offset */
g_push (CF_PTR, 0);
- PtrOffs = oursp;
+ PtrOffs = StackPtr;
}
/* Check for known standard functions and inline them if requested */
/* Inline this function */
HandleStdFunc (Func, Expr);
- return;
+ goto ExitPoint;
}
g_call (TypeOf (Expr->Type), (const char*) Expr->Name, ParamSize);
}
+
+ExitPoint:
+ /* The function result is an rvalue in the primary register */
+ ED_MakeRValExpr (Expr);
+ Expr->Type = GetFuncReturn (Expr->Type);
}
SymEntry* Sym;
/* Initialize fields in the expression stucture */
- E->Test = 0; /* No test */
- E->Sym = 0; /* Symbol unknown */
+ ED_Init (E);
/* Character and integer constants. */
if (CurTok.Tok == TOK_ICONST || CurTok.Tok == TOK_CCONST) {
- E->Flags = E_MCONST | E_TCONST | E_RVAL;
+ E->Flags = E_LOC_ABS | E_RTYPE_RVAL;
E->Type = CurTok.Type;
- E->ConstVal = CurTok.IVal;
+ E->Val = CurTok.IVal;
NextToken ();
return;
}
*/
if (CurTok.Tok == TOK_LPAREN) {
NextToken ();
- hie0 (InitExprDesc (E));
+ hie0 (E);
ConsumeRParen ();
return;
}
* is an undefined macro and replace it by a constant value of zero.
*/
if (Preprocessing && CurTok.Tok == TOK_IDENT) {
- ED_MakeConstInt (E, 0);
+ ED_MakeConstAbsInt (E, 0);
return;
}
if (Preprocessing) {
/* Illegal expression in PP mode */
Error ("Preprocessor expression expected");
- ED_MakeConstInt (E, 1);
+ ED_MakeConstAbsInt (E, 1);
return;
}
/* We found the symbol - skip the name token */
NextToken ();
- /* The expression type is the symbol type */
- E->Type = Sym->Type;
-
/* Check for illegal symbol types */
CHECK ((Sym->Flags & SC_LABEL) != SC_LABEL);
if (Sym->Flags & SC_TYPE) {
/* Cannot use type symbols */
Error ("Variable identifier expected");
/* Assume an int type to make E valid */
- E->Flags = E_MLOCAL | E_TLOFFS | E_LVAL;
+ E->Flags = E_LOC_STACK | E_RTYPE_LVAL;
E->Type = type_int;
- E->ConstVal = 0;
return;
}
/* Mark the symbol as referenced */
Sym->Flags |= SC_REF;
+ /* The expression type is the symbol type */
+ E->Type = Sym->Type;
+
/* Check for legal symbol types */
if ((Sym->Flags & SC_CONST) == SC_CONST) {
/* Enum or some other numeric constant */
- E->Flags = E_MCONST | E_TCONST | E_RVAL;
- E->ConstVal = Sym->V.ConstVal;
+ E->Flags = E_LOC_ABS | E_RTYPE_RVAL;
+ E->Val = Sym->V.ConstVal;
} else if ((Sym->Flags & SC_FUNC) == SC_FUNC) {
/* Function */
- E->Flags = E_MGLOBAL | E_MCONST | E_TGLAB | E_RVAL;
+ E->Flags = E_LOC_GLOBAL | E_RTYPE_LVAL;
E->Name = (unsigned long) Sym->Name;
- E->ConstVal = 0;
} else if ((Sym->Flags & SC_AUTO) == SC_AUTO) {
/* Local variable. If this is a parameter for a variadic
* function, we have to add some address calculations, and the
if ((Sym->Flags & SC_PARAM) == SC_PARAM && F_IsVariadic (CurrentFunc)) {
/* Variadic parameter */
g_leavariadic (Sym->V.Offs - F_GetParamSize (CurrentFunc));
- E->Flags = E_MEXPR | E_LVAL;
- E->ConstVal = 0;
+ E->Flags = E_LOC_EXPR | E_RTYPE_LVAL;
} else {
/* Normal parameter */
- E->Flags = E_MLOCAL | E_TLOFFS | E_LVAL;
- E->ConstVal = Sym->V.Offs;
+ E->Flags = E_LOC_STACK | E_RTYPE_LVAL;
+ E->Val = Sym->V.Offs;
}
} else if ((Sym->Flags & SC_REGISTER) == SC_REGISTER) {
/* Register variable, zero page based */
- E->Flags = E_MGLOBAL | E_MCONST | E_TREGISTER | E_LVAL;
+ E->Flags = E_LOC_REGISTER | E_RTYPE_LVAL;
E->Name = Sym->V.R.RegOffs;
- E->ConstVal = 0;
} else if ((Sym->Flags & SC_STATIC) == SC_STATIC) {
/* Static variable */
if (Sym->Flags & (SC_EXTERN | SC_STORAGE)) {
- E->Flags = E_MGLOBAL | E_MCONST | E_TGLAB | E_LVAL;
+ E->Flags = E_LOC_GLOBAL | E_RTYPE_LVAL;
E->Name = (unsigned long) Sym->Name;
} else {
- E->Flags = E_MGLOBAL | E_MCONST | E_TLLAB | E_LVAL;
+ E->Flags = E_LOC_STATIC | E_RTYPE_LVAL;
E->Name = Sym->V.Label;
}
- E->ConstVal = 0;
} else {
/* Local static variable */
- E->Flags = E_MGLOBAL | E_MCONST | E_TLLAB | E_LVAL;
+ E->Flags = E_LOC_STATIC | E_RTYPE_LVAL;
E->Name = Sym->V.Offs;
- E->ConstVal = 0;
}
- /* The following should not be necessary if the reference flag is
- * set right above, but currently I do not oversee if it's really
- * needed and the old code did it.
- * ###
+ /* We've made all variables lvalues above. However, this is
+ * not always correct: An array is actually the address of its
+ * first element, which is a rvalue, and a function is a
+ * rvalue, too, because we cannot store anything in a function.
+ * So fix the flags depending on the type.
*/
- ED_SetValType (E, !IsTypeFunc (E->Type) && !IsTypeArray (E->Type));
+ if (IsTypeArray (E->Type) || IsTypeFunc (E->Type)) {
+ ED_MakeRVal (E);
+ }
} else {
Warning ("Function call without a prototype");
Sym = AddGlobalSym (Ident, GetImplicitFuncType(), SC_EXTERN | SC_REF | SC_FUNC);
E->Type = Sym->Type;
- E->Flags = E_MGLOBAL | E_MCONST | E_TGLAB | E_RVAL;
+ E->Flags = E_LOC_GLOBAL | E_RTYPE_RVAL;
E->Name = (unsigned long) Sym->Name;
- E->ConstVal = 0;
} else {
/* Undeclared Variable */
Sym = AddLocalSym (Ident, type_int, SC_AUTO | SC_REF, 0);
- E->Flags = E_MLOCAL | E_TLOFFS | E_LVAL;
+ E->Flags = E_LOC_STACK | E_RTYPE_LVAL;
E->Type = type_int;
- E->ConstVal = 0;
Error ("Undefined symbol: `%s'", Ident);
}
case TOK_SCONST:
/* String literal */
- E->Flags = E_MCONST | E_TLIT | E_RVAL;
- E->ConstVal = CurTok.IVal;
+ E->Flags = E_LOC_LITERAL | E_RTYPE_RVAL;
+ E->Val = CurTok.IVal;
E->Type = GetCharArrayType (GetLiteralPoolOffs () - CurTok.IVal);
NextToken ();
break;
case TOK_ASM:
/* ASM statement */
AsmStatement ();
- E->Flags = E_MEXPR | E_RVAL;
- E->ConstVal = 0;
+ E->Flags = E_LOC_EXPR | E_RTYPE_RVAL;
E->Type = type_void;
break;
+ case TOK_A:
+ /* Register pseudo variable */
+ E->Type = type_uchar;
+ E->Flags = E_LOC_PRIMARY | E_RTYPE_LVAL;
+ NextToken ();
+ break;
+
case TOK_AX:
+ /* Register pseudo variable */
+ E->Type = type_uint;
+ E->Flags = E_LOC_PRIMARY | E_RTYPE_LVAL;
+ NextToken ();
+ break;
+
case TOK_EAX:
- /* __AX__ and __EAX__ pseudo values */
- E->Type = (CurTok.Tok == TOK_AX)? type_uint : type_ulong;
- E->Flags = E_MREG | E_LVAL; /* May be used as lvalue */
- E->Test &= ~E_CC;
- E->ConstVal = 0;
+ /* Register pseudo variable */
+ E->Type = type_ulong;
+ E->Flags = E_LOC_PRIMARY | E_RTYPE_LVAL;
NextToken ();
break;
default:
/* Illegal primary. */
Error ("Expression expected");
- ED_MakeConstInt (E, 1);
+ ED_MakeConstAbsInt (E, 1);
break;
}
}
static void ArrayRef (ExprDesc* Expr)
/* Handle an array reference */
{
- unsigned lflags;
- unsigned rflags;
- int ConstBaseAddr;
- int ConstSubAddr;
- ExprDesc lval2;
- CodeMark Mark1;
- CodeMark Mark2;
- type* tptr1;
- type* tptr2;
+ int ConstBaseAddr;
+ ExprDesc SubScript;
+ CodeMark Mark1;
+ CodeMark Mark2;
+ type* ElementType;
+ type* tptr1;
/* Skip the bracket */
* address. This is true for most arrays and will produce a lot better
* code. Check if this is a const base address.
*/
- lflags = Expr->Flags & ~E_MCTYPE;
- ConstBaseAddr = (lflags == E_MCONST) || /* Constant numeric address */
- (lflags & E_MGLOBAL) != 0 || /* Static array, or ... */
- lflags == E_MLOCAL; /* Local array */
+ ConstBaseAddr = (ED_IsLocConst (Expr) || ED_IsLocStack (Expr));
/* If we have a constant base, we delay the address fetch */
Mark1 = GetCodePos ();
- Mark2 = 0; /* Silence gcc */
+ Mark2 = 0; /* Silence gcc */
if (!ConstBaseAddr) {
/* Get a pointer to the array into the primary */
ExprLoad (CF_NONE, Expr);
}
/* TOS now contains ptr to array elements. Get the subscript. */
- hie0 (&lval2);
- if (ED_IsRVal (&lval2) && lval2.Flags == E_MCONST) {
+ ExprWithCheck (hie0, &SubScript);
+
+ /* Check the types of array and subscript. We can either have a
+ * pointer/array to the left, in which case the subscript must be of an
+ * integer type, or we have an integer to the left, in which case the
+ * subscript must be a pointer/array.
+ * Since we do the necessary checking here, we can rely later on the
+ * correct types.
+ */
+ if (IsClassPtr (Expr->Type)) {
+ if (!IsClassInt (SubScript.Type)) {
+ Error ("Array subscript is not an integer");
+ /* To avoid any compiler errors, make the expression a valid int */
+ ED_MakeConstAbsInt (&SubScript, 0);
+ }
+ ElementType = Indirect (Expr->Type);
+ } else if (IsClassInt (Expr->Type)) {
+ if (!IsClassPtr (SubScript.Type)) {
+ Error ("Subscripted value is neither array nor pointer");
+ /* To avoid compiler errors, make the subscript a char[] at
+ * address 0.
+ */
+ ED_MakeConstAbs (&SubScript, 0, GetCharArrayType (1));
+ }
+ ElementType = Indirect (SubScript.Type);
+ } else {
+ Error ("Cannot subscript");
+ /* To avoid compiler errors, fake both the array and the subscript, so
+ * we can just proceed.
+ */
+ ED_MakeConstAbs (Expr, 0, GetCharArrayType (1));
+ ED_MakeConstAbsInt (&SubScript, 0);
+ ElementType = Indirect (Expr->Type);
+ }
+
+ /* Check if the subscript is constant absolute value */
+ if (ED_IsConstAbs (&SubScript)) {
- /* The array subscript is a constant - remove value from stack */
+ /* The array subscript is a numeric constant. If we had pushed the
+ * array base address onto the stack before, we can remove this value,
+ * since we can generate expression+offset.
+ */
if (!ConstBaseAddr) {
RemoveCode (Mark2);
pop (CF_PTR);
ExprLoad (CF_NONE, Expr);
}
- if (IsClassPtr (tptr1)) {
+ if (IsClassPtr (Expr->Type)) {
- /* Scale the subscript value according to element size */
- lval2.ConstVal *= CheckedPSizeOf (tptr1);
+ /* Lhs is pointer/array. Scale the subscript value according to
+ * the element size.
+ */
+ SubScript.Val *= CheckedSizeOf (ElementType);
- /* Remove code for lhs load */
- RemoveCode (Mark1);
+ /* Remove the address load code */
+ RemoveCode (Mark1);
- /* Handle constant base array on stack. Be sure NOT to
- * handle pointers the same way, and check for character literals
- * (both won't work).
- */
- if (IsTypeArray (tptr1) && Expr->Flags != (E_MCONST | E_TLIT) &&
- ((Expr->Flags & ~E_MCTYPE) == E_MCONST ||
- (Expr->Flags & ~E_MCTYPE) == E_MLOCAL ||
- (Expr->Flags & E_MGLOBAL) != 0 ||
- (Expr->Flags == E_MEOFFS))) {
- Expr->ConstVal += lval2.ConstVal;
+ /* In case of an array, we can adjust the offset of the expression
+ * already in Expr. If the base address was a constant, we can even
+ * remove the code that loaded the address into the primary.
+ */
+ if (IsTypeArray (Expr->Type)) {
- } else {
- /* Pointer - load into primary and remember offset */
- if ((Expr->Flags & E_MEXPR) == 0 || ED_IsLVal (Expr)) {
- ExprLoad (CF_NONE, Expr);
- }
- Expr->ConstVal = lval2.ConstVal;
- Expr->Flags = E_MEOFFS;
- }
+ /* Adjust the offset */
+ Expr->Val += SubScript.Val;
+
+ } else {
- /* Result is of element type */
- Expr->Type = Indirect (tptr1);
+ /* It's a pointer, so we do have to load it into the primary
+ * first (if it's not already there).
+ */
+ if (ConstBaseAddr) {
+ ExprLoad (CF_NONE, Expr);
+ ED_MakeRValExpr (Expr);
+ }
- /* Done */
- goto end_array;
+ /* Use the offset */
+ Expr->Val = SubScript.Val;
+ }
- } else if (IsClassPtr (tptr2 = lval2.Type)) {
- /* Subscript is pointer, get element type */
- lval2.Type = Indirect (tptr2);
+ } else {
- /* Scale the rhs value in the primary register */
- g_scale (TypeOf (tptr1), CheckedSizeOf (lval2.Type));
- /* */
- Expr->Type = lval2.Type;
- } else {
- Error ("Cannot subscript");
- }
+ /* Scale the rhs value according to the element type */
+ g_scale (TypeOf (tptr1), CheckedSizeOf (ElementType));
- /* Add the subscript. Since arrays are indexed by integers,
- * we will ignore the true type of the subscript here and
- * use always an int.
- */
- g_inc (CF_INT | CF_CONST, lval2.ConstVal);
+ /* Add the subscript. Since arrays are indexed by integers,
+ * we will ignore the true type of the subscript here and
+ * use always an int. #### Use offset but beware of ExprLoad!
+ */
+ g_inc (CF_INT | CF_CONST, SubScript.Val);
+
+ }
} else {
/* Array subscript is not constant. Load it into the primary */
Mark2 = GetCodePos ();
- ExprLoad (CF_NONE, &lval2);
-
- tptr2 = lval2.Type;
- if (IsClassPtr (tptr1)) {
+ ExprLoad (CF_NONE, &SubScript);
- /* Get the element type */
- Expr->Type = Indirect (tptr1);
+ /* Do scaling */
+ if (IsClassPtr (Expr->Type)) {
- /* Indexing is based on int's, so we will just use the integer
+ /* Indexing is based on unsigneds, so we will just use the integer
* portion of the index (which is in (e)ax, so there's no further
* action required).
*/
- g_scale (CF_INT, CheckedSizeOf (Expr->Type));
-
- } else if (IsClassPtr (tptr2)) {
+ g_scale (CF_INT | CF_UNSIGNED, CheckedSizeOf (ElementType));
- /* Get the element type */
- lval2.Type = Indirect (tptr2);
+ } else {
- /* Get the int value on top. If we go here, we're sure,
- * both values are 16 bit (the first one was truncated
- * if necessary and the second one is a pointer).
- * Note: If ConstBaseAddr is true, we don't have a value on
- * stack, so to "swap" both, just push the subscript.
+ /* Get the int value on top. If we come here, we're sure, both
+ * values are 16 bit (the first one was truncated if necessary
+ * and the second one is a pointer). Note: If ConstBaseAddr is
+ * true, we don't have a value on stack, so to "swap" both, just
+ * push the subscript.
*/
if (ConstBaseAddr) {
- g_push (CF_INT, 0);
- ExprLoad (CF_NONE, Expr);
- ConstBaseAddr = 0;
+ g_push (CF_INT, 0);
+ ExprLoad (CF_NONE, Expr);
+ ConstBaseAddr = 0;
} else {
g_swap (CF_INT);
}
/* Scale it */
- g_scale (TypeOf (tptr1), CheckedSizeOf (lval2.Type));
- Expr->Type = lval2.Type;
- } else {
- Error ("Cannot subscript");
+ g_scale (TypeOf (tptr1), CheckedSizeOf (ElementType));
+
}
- /* The offset is now in the primary register. It didn't have a
+ /* The offset is now in the primary register. It we didn't have a
* constant base address for the lhs, the lhs address is already
* on stack, and we must add the offset. If the base address was
* constant, we call special functions to add the address to the
* offset value.
*/
if (!ConstBaseAddr) {
- /* Add the subscript. Both values are int sized. */
- g_add (CF_INT, 0);
- } else {
- /* If the subscript has itself a constant address, it is often
- * a better idea to reverse again the order of the evaluation.
- * This will generate better code if the subscript is a byte
- * sized variable. But beware: This is only possible if the
+ /* The array base address is on stack and the subscript is in the
+ * primary. Add both.
+ */
+ g_add (CF_INT | CF_UNSIGNED, 0);
+
+ } else {
+
+ /* The subscript is in the primary, and the array base address is
+ * in Expr. If the subscript has itself a constant address, it is
+ * often a better idea to reverse again the order of the
+ * evaluation. This will generate better code if the subscript is
+ * a byte sized variable. But beware: This is only possible if the
* subscript was not scaled, that is, if this was a byte array
* or pointer.
*/
- rflags = lval2.Flags & ~E_MCTYPE;
- ConstSubAddr = (rflags == E_MCONST) || /* Constant numeric address */
- (rflags & E_MGLOBAL) != 0 || /* Static array, or ... */
- rflags == E_MLOCAL; /* Local array */
+ if ((ED_IsLocConst (&SubScript) || ED_IsLocStack (&SubScript)) &&
+ CheckedSizeOf (ElementType) == SIZEOF_CHAR) {
- if (ConstSubAddr && CheckedSizeOf (Expr->Type) == SIZEOF_CHAR) {
-
- type* SavedType;
+ unsigned Flags;
/* Reverse the order of evaluation */
- unsigned flags = (CheckedSizeOf (lval2.Type) == SIZEOF_CHAR)? CF_CHAR : CF_INT;
+ if (CheckedSizeOf (SubScript.Type) == SIZEOF_CHAR) {
+ Flags = CF_CHAR;
+ } else {
+ Flags = CF_INT;
+ }
RemoveCode (Mark2);
- /* Get a pointer to the array into the primary. We have changed
- * Type above but we need the original type to load the
- * address, so restore it temporarily.
- */
- SavedType = Expr->Type;
- Expr->Type = tptr1;
+ /* Get a pointer to the array into the primary. */
ExprLoad (CF_NONE, Expr);
- Expr->Type = SavedType;
/* Add the variable */
- if (rflags == E_MLOCAL) {
- g_addlocal (flags, lval2.ConstVal);
+ if (ED_IsLocStack (&SubScript)) {
+ g_addlocal (Flags, SubScript.Val);
} else {
- flags |= GlobalModeFlags (lval2.Flags);
- g_addstatic (flags, lval2.Name, lval2.ConstVal);
+ Flags |= GlobalModeFlags (SubScript.Flags);
+ g_addstatic (Flags, SubScript.Name, SubScript.Val);
}
} else {
- if (lflags == E_MCONST) {
+ if (ED_IsLocAbs (Expr)) {
/* Constant numeric address. Just add it */
- g_inc (CF_INT | CF_UNSIGNED, Expr->ConstVal);
- } else if (lflags == E_MLOCAL) {
+ g_inc (CF_INT | CF_UNSIGNED, Expr->Val);
+ } else if (ED_IsLocStack (Expr)) {
/* Base address is a local variable address */
- if (IsTypeArray (tptr1)) {
- g_addaddr_local (CF_INT, Expr->ConstVal);
+ if (IsTypeArray (Expr->Type)) {
+ g_addaddr_local (CF_INT, Expr->Val);
} else {
- g_addlocal (CF_PTR, Expr->ConstVal);
+ g_addlocal (CF_PTR, Expr->Val);
}
} else {
/* Base address is a static variable address */
- unsigned flags = CF_INT;
- flags |= GlobalModeFlags (Expr->Flags);
- if (IsTypeArray (tptr1)) {
- g_addaddr_static (flags, Expr->Name, Expr->ConstVal);
+ unsigned Flags = CF_INT | GlobalModeFlags (Expr->Flags);
+ if (IsTypeArray (Expr->Type)) {
+ g_addaddr_static (Flags, Expr->Name, Expr->Val);
} else {
- g_addstatic (flags, Expr->Name, Expr->ConstVal);
+ g_addstatic (Flags, Expr->Name, Expr->Val);
}
}
}
+
+
}
+
+ /* The result is an expression in the primary */
+ ED_MakeRValExpr (Expr);
+
}
- Expr->Flags = E_MEXPR;
-end_array:
+
+ /* Result is of element type */
+ Expr->Type = ElementType;
+
+ /* An array element is actually a variable. So the rules for variables
+ * with respect to the reference type apply: If it's an array, it is
+ * a rvalue, otherwise it's an lvalue. (A function would also be a rvalue,
+ * but an array cannot contain functions).
+ */
+ if (IsTypeArray (Expr->Type)) {
+ ED_MakeRVal (Expr);
+ } else {
+ ED_MakeLVal (Expr);
+ }
+
+ /* Consume the closing bracket */
ConsumeRBrack ();
- ED_SetValType (Expr, !IsTypeArray (Expr->Type));
}
{
ident Ident;
SymEntry* Field;
- int Flags;
/* Skip the token and check for an identifier */
NextToken ();
return;
}
- /* If we have constant input data, the result is also constant */
- Flags = (Expr->Flags & ~E_MCTYPE);
- if (Flags == E_MCONST ||
- (ED_IsRVal (Expr) && (Flags == E_MLOCAL ||
- (Flags & E_MGLOBAL) != 0 ||
- Expr->Flags == E_MEOFFS))) {
- Expr->ConstVal += Field->V.Offs;
- } else {
- if ((Flags & E_MEXPR) == 0 || ED_IsLVal (Expr)) {
- ExprLoad (CF_NONE, Expr);
- }
- Expr->ConstVal = Field->V.Offs;
- Expr->Flags = E_MEOFFS;
+ /* If we have a struct pointer that is not already in the primary, load
+ * it now.
+ */
+ if (IsTypePtr (Expr->Type)) {
+
+ /* Load into the primary */
+ ExprLoad (CF_NONE, Expr);
+
+ /* Make it an lvalue expression */
+ ED_MakeLValExpr (Expr);
}
+
+ /* Set the struct field offset */
+ Expr->Val += Field->V.Offs;
+
+ /* The type is now the type of the field */
Expr->Type = Field->Type;
- ED_SetValType (Expr, !IsTypeArray (Field->Type));
+
+ /* An struct member is actually a variable. So the rules for variables
+ * with respect to the reference type apply: If it's an array, it is
+ * a rvalue, otherwise it's an lvalue. (A function would also be a rvalue,
+ * but a struct field cannot be a function).
+ */
+ if (IsTypeArray (Expr->Type)) {
+ ED_MakeRVal (Expr);
+ } else {
+ ED_MakeLVal (Expr);
+ }
}
case TOK_LPAREN:
/* Function call. */
- if (IsTypeFunc (Expr->Type) || IsTypeFuncPtr (Expr->Type)) {
-
- /* Call the function */
- FunctionCall (Expr);
-
- /* Result is in the primary register */
- Expr->Flags = E_MEXPR | E_RVAL;
-
- /* Set to result */
- Expr->Type = GetFuncReturn (Expr->Type);
-
- } else {
+ if (!IsTypeFunc (Expr->Type) && !IsTypeFuncPtr (Expr->Type)) {
+ /* Not a function */
Error ("Illegal function call");
- ED_MakeRVal (Expr);
+ /* Force the type to be a implicitly defined function, one
+ * returning an int and taking any number of arguments.
+ * Since we don't have a name, place it at absolute address
+ * zero.
+ */
+ ED_MakeConstAbs (Expr, 0, GetImplicitFuncType ());
}
+ /* Call the function */
+ FunctionCall (Expr);
break;
case TOK_DOT:
if (!IsClassStruct (Expr->Type)) {
Error ("Struct expected");
}
- ED_MakeRVal (Expr); /* #### ? */
StructRef (Expr);
break;
{
unsigned Flags;
- unsigned f = Expr->Flags;
-
/* If StoreType was not given, use Expr->Type instead */
if (StoreType == 0) {
StoreType = Expr->Type;
}
- /* Get the code generator flags */
+ /* Prepare the code generator flags */
Flags = TypeOf (StoreType);
- if (f & E_MGLOBAL) {
- Flags |= GlobalModeFlags (f);
- if (Expr->Test) {
- /* Just testing */
- Flags |= CF_TEST;
- }
-
- /* Generate code */
- g_putstatic (Flags, Expr->Name, Expr->ConstVal);
-
- } else if (f & E_MLOCAL) {
- /* Store an auto variable */
- g_putlocal (Flags, Expr->ConstVal, 0);
- } else if (f == E_MEOFFS) {
- /* Store indirect with offset */
- g_putind (Flags, Expr->ConstVal);
- } else if (f != E_MREG) {
- if (f & E_MEXPR) {
- /* Indirect without offset */
- g_putind (Flags, 0);
- } else {
- /* Store into absolute address */
- g_putstatic (Flags | CF_ABSOLUTE, Expr->ConstVal, 0);
- }
+ if (Expr->Test) {
+ /* Testing the value */
+ Flags |= CF_TEST;
+ }
+
+ /* Do the store depending on the location */
+ switch (ED_GetLoc (Expr)) {
+
+ case E_LOC_ABS:
+ /* Absolute: numeric address or const */
+ g_putstatic (Flags | CF_ABSOLUTE, Expr->Val, 0);
+ break;
+
+ case E_LOC_GLOBAL:
+ /* Global variable */
+ g_putstatic (Flags | CF_EXTERNAL, Expr->Name, Expr->Val);
+ break;
+
+ case E_LOC_STATIC:
+ /* Static variable */
+ g_putstatic (Flags | CF_STATIC, Expr->Name, Expr->Val);
+ break;
+
+ case E_LOC_REGISTER:
+ /* Register variable */
+ g_putstatic (Flags | CF_REGVAR, Expr->Name, Expr->Val);
+ break;
+
+ case E_LOC_STACK:
+ /* Value on the stack */
+ g_putlocal (Flags, Expr->Val, 0);
+ break;
+
+ case E_LOC_PRIMARY:
+ /* The primary register (value is already there) */
+ /* ### Do we need a test here if the flag is set? */
+ break;
+
+ case E_LOC_EXPR:
+ /* An expression in the primary register */
+ g_putind (Flags, Expr->Val);
+ break;
+
+ case E_LOC_LITERAL:
+ /* Literal in the literal pool */
+ g_putstatic (Flags | CF_STATIC, LiteralPoolLabel, Expr->Val);
+ break;
+
+ default:
+ Internal ("Invalid location in Store(): 0x%04X", ED_GetLoc (Expr));
}
/* Assume that each one of the stores will invalidate CC */
-static void PreIncDec (ExprDesc* Expr, void (*inc) (unsigned, unsigned long))
-/* Handle --i and ++i */
+static void PreInc (ExprDesc* Expr)
+/* Handle the preincrement operators */
{
- unsigned flags;
- unsigned long val;
+ unsigned Flags;
+ unsigned long Val;
/* Skip the operator token */
NextToken ();
/* Evaluate the expression and check that it is an lvalue */
hie10 (Expr);
- if (ED_IsRVal (Expr) == 0) {
- Error ("Invalid lvalue");
- return;
+ if (!ED_IsLVal (Expr)) {
+ Error ("Invalid lvalue");
+ return;
}
/* Get the data type */
- flags = TypeOf (Expr->Type) | CF_FORCECHAR | CF_CONST;
+ Flags = TypeOf (Expr->Type) | CF_FORCECHAR | CF_CONST;
/* Get the increment value in bytes */
- val = (Expr->Type[0] == T_PTR)? CheckedPSizeOf (Expr->Type) : 1;
-
- /* Check for special addressing modes */
- if (Expr->Flags & E_MGLOBAL) {
- /* Global address */
- flags |= GlobalModeFlags (Expr->Flags);
- if (inc == g_inc) {
- g_addeqstatic (flags, Expr->Name, Expr->ConstVal, val);
- } else {
- g_subeqstatic (flags, Expr->Name, Expr->ConstVal, val);
- }
- } else if (Expr->Flags & E_MLOCAL) {
- /* Local address */
- if (inc == g_inc) {
- g_addeqlocal (flags, Expr->ConstVal, val);
- } else {
- g_subeqlocal (flags, Expr->ConstVal, val);
- }
- } else if (Expr->Flags & E_MCONST) {
- /* Constant absolute address */
- flags |= CF_ABSOLUTE;
- if (inc == g_inc) {
- g_addeqstatic (flags, Expr->ConstVal, 0, val);
- } else {
- g_subeqstatic (flags, Expr->ConstVal, 0, val);
- }
- } else if (Expr->Flags & E_MEXPR) {
- /* Address in a/x, check if we have an offset */
- unsigned Offs = (Expr->Flags == E_MEOFFS)? Expr->ConstVal : 0;
- if (inc == g_inc) {
- g_addeqind (flags, Offs, val);
- } else {
- g_subeqind (flags, Offs, val);
- }
- } else {
+ Val = IsTypePtr (Expr->Type)? CheckedPSizeOf (Expr->Type) : 1;
- /* Use generic code. Push the address if needed */
- PushAddr (Expr);
+ /* Check the location of the data */
+ switch (ED_GetLoc (Expr)) {
- /* Fetch the value */
- ExprLoad (CF_NONE, Expr);
+ case E_LOC_ABS:
+ /* Absolute: numeric address or const */
+ g_addeqstatic (Flags | CF_ABSOLUTE, Expr->Val, 0, Val);
+ break;
+
+ case E_LOC_GLOBAL:
+ /* Global variable */
+ g_addeqstatic (Flags | CF_EXTERNAL, Expr->Name, Expr->Val, Val);
+ break;
+
+ case E_LOC_STATIC:
+ /* Static variable */
+ g_addeqstatic (Flags | CF_STATIC, Expr->Name, Expr->Val, Val);
+ break;
+
+ case E_LOC_REGISTER:
+ /* Register variable */
+ g_addeqstatic (Flags | CF_REGVAR, Expr->Name, Expr->Val, Val);
+ break;
+
+ case E_LOC_STACK:
+ /* Value on the stack */
+ g_addeqlocal (Flags, Expr->Val, Val);
+ break;
+
+ case E_LOC_PRIMARY:
+ /* The primary register */
+ g_inc (Flags, Val);
+ break;
+
+ case E_LOC_EXPR:
+ /* An expression in the primary register */
+ g_addeqind (Flags, Expr->Val, Val);
+ break;
+
+ case E_LOC_LITERAL:
+ /* Literal in the literal pool */
+ g_addeqstatic (Flags | CF_STATIC, LiteralPoolLabel, Expr->Val, Val);
+ break;
+
+ default:
+ Internal ("Invalid location in PreInc(): 0x%04X", ED_GetLoc (Expr));
+ }
+
+ /* Result is an expression, no reference */
+ ED_MakeRValExpr (Expr);
+}
+
+
+
+static void PreDec (ExprDesc* Expr)
+/* Handle the predecrement operators */
+{
+ unsigned Flags;
+ unsigned long Val;
+
+ /* Skip the operator token */
+ NextToken ();
+
+ /* Evaluate the expression and check that it is an lvalue */
+ hie10 (Expr);
+ if (!ED_IsLVal (Expr)) {
+ Error ("Invalid lvalue");
+ return;
+ }
+
+ /* Get the data type */
+ Flags = TypeOf (Expr->Type) | CF_FORCECHAR | CF_CONST;
+
+ /* Get the increment value in bytes */
+ Val = IsTypePtr (Expr->Type)? CheckedPSizeOf (Expr->Type) : 1;
+
+ /* Check the location of the data */
+ switch (ED_GetLoc (Expr)) {
+
+ case E_LOC_ABS:
+ /* Absolute: numeric address or const */
+ g_subeqstatic (Flags | CF_ABSOLUTE, Expr->Val, 0, Val);
+ break;
+
+ case E_LOC_GLOBAL:
+ /* Global variable */
+ g_subeqstatic (Flags | CF_EXTERNAL, Expr->Name, Expr->Val, Val);
+ break;
+
+ case E_LOC_STATIC:
+ /* Static variable */
+ g_subeqstatic (Flags | CF_STATIC, Expr->Name, Expr->Val, Val);
+ break;
+
+ case E_LOC_REGISTER:
+ /* Register variable */
+ g_subeqstatic (Flags | CF_REGVAR, Expr->Name, Expr->Val, Val);
+ break;
+
+ case E_LOC_STACK:
+ /* Value on the stack */
+ g_subeqlocal (Flags, Expr->Val, Val);
+ break;
+
+ case E_LOC_PRIMARY:
+ /* The primary register */
+ g_inc (Flags, Val);
+ break;
- /* Increment value in primary */
- inc (flags, val);
+ case E_LOC_EXPR:
+ /* An expression in the primary register */
+ g_subeqind (Flags, Expr->Val, Val);
+ break;
- /* Store the result back */
- Store (Expr, 0);
+ case E_LOC_LITERAL:
+ /* Literal in the literal pool */
+ g_subeqstatic (Flags | CF_STATIC, LiteralPoolLabel, Expr->Val, Val);
+ break;
+ default:
+ Internal ("Invalid location in PreDec(): 0x%04X", ED_GetLoc (Expr));
}
/* Result is an expression, no reference */
- Expr->Flags = E_MEXPR | E_RVAL;
+ ED_MakeRValExpr (Expr);
}
static void PostIncDec (ExprDesc* Expr, void (*inc) (unsigned, unsigned long))
/* Handle i-- and i++ */
{
- unsigned flags;
+ unsigned Flags;
NextToken ();
/* The expression to increment must be an lvalue */
- if (ED_IsRVal (Expr)) {
+ if (!ED_IsLVal (Expr)) {
Error ("Invalid lvalue");
return;
}
/* Get the data type */
- flags = TypeOf (Expr->Type);
+ Flags = TypeOf (Expr->Type);
/* Push the address if needed */
PushAddr (Expr);
/* Fetch the value and save it (since it's the result of the expression) */
ExprLoad (CF_NONE, Expr);
- g_save (flags | CF_FORCECHAR);
+ g_save (Flags | CF_FORCECHAR);
/* If we have a pointer expression, increment by the size of the type */
- if (Expr->Type[0] == T_PTR) {
- inc (flags | CF_CONST | CF_FORCECHAR, CheckedSizeOf (Expr->Type + 1));
+ if (IsTypePtr (Expr->Type)) {
+ inc (Flags | CF_CONST | CF_FORCECHAR, CheckedSizeOf (Expr->Type + 1));
} else {
- inc (flags | CF_CONST | CF_FORCECHAR, 1);
+ inc (Flags | CF_CONST | CF_FORCECHAR, 1);
}
/* Store the result back */
Store (Expr, 0);
/* Restore the original value in the primary register */
- g_restore (flags | CF_FORCECHAR);
+ g_restore (Flags | CF_FORCECHAR);
/* The result is always an expression, no reference */
- Expr->Flags = E_MEXPR | E_RVAL;
+ ED_MakeRValExpr (Expr);
}
static void UnaryOp (ExprDesc* Expr)
/* Handle unary -/+ and ~ */
{
- unsigned flags;
+ unsigned Flags;
/* Remember the operator token and skip it */
token_t Tok = CurTok.Tok;
/* Get the expression */
hie10 (Expr);
+ /* We can only handle integer types */
+ if (!IsClassInt (Expr->Type)) {
+ Error ("Argument must have integer type");
+ ED_MakeConstAbsInt (Expr, 1);
+ }
+
/* Check for a constant expression */
- if (ED_IsRVal (Expr) && (Expr->Flags & E_MCONST) != 0) {
+ if (ED_IsConstAbs (Expr)) {
/* Value is constant */
switch (Tok) {
- case TOK_MINUS: Expr->ConstVal = -Expr->ConstVal; break;
- case TOK_PLUS: break;
- case TOK_COMP: Expr->ConstVal = ~Expr->ConstVal; break;
+ case TOK_MINUS: Expr->Val = -Expr->Val; break;
+ case TOK_PLUS: break;
+ case TOK_COMP: Expr->Val = ~Expr->Val; break;
default: Internal ("Unexpected token: %d", Tok);
}
} else {
ExprLoad (CF_NONE, Expr);
/* Get the type of the expression */
- flags = TypeOf (Expr->Type);
+ Flags = TypeOf (Expr->Type);
/* Handle the operation */
switch (Tok) {
- case TOK_MINUS: g_neg (flags); break;
+ case TOK_MINUS: g_neg (Flags); break;
case TOK_PLUS: break;
- case TOK_COMP: g_com (flags); break;
- default: Internal ("Unexpected token: %d", Tok);
+ case TOK_COMP: g_com (Flags); break;
+ default: Internal ("Unexpected token: %d", Tok);
}
/* The result is a rvalue in the primary */
- Expr->Flags = E_MEXPR | E_RVAL;
+ ED_MakeRValExpr (Expr);
}
}
void hie10 (ExprDesc* Expr)
/* Handle ++, --, !, unary - etc. */
{
+ unsigned long Size;
+
switch (CurTok.Tok) {
case TOK_INC:
- PreIncDec (Expr, g_inc);
+ PreInc (Expr);
break;
case TOK_DEC:
- PostIncDec (Expr, g_dec);
+ PreDec (Expr);
break;
case TOK_PLUS:
NextToken ();
if (evalexpr (CF_NONE, hie10, Expr) == 0) {
/* Constant expression */
- Expr->ConstVal = !Expr->ConstVal;
+ Expr->Val = !Expr->Val;
} else {
g_bneg (TypeOf (Expr->Type));
+ ED_MakeRValExpr (Expr);
Expr->Test |= E_CC; /* bneg will set cc */
- Expr->Flags = E_MEXPR | E_RVAL; /* say it's an expr */
}
break;
NextToken ();
if (evalexpr (CF_NONE, hie10, Expr) != 0) {
/* Expression is not const, indirect value loaded into primary */
- Expr->Flags = E_MEXPR | E_RVAL;
- Expr->ConstVal = 0; /* Offset is zero now */
+ ED_MakeRValExpr (Expr);
}
/* If the expression is already a pointer to function, the
* additional dereferencing operator must be ignored.
if (TypeSpecAhead ()) {
type Type[MAXTYPELEN];
NextToken ();
- Expr->ConstVal = CheckedSizeOf (ParseType (Type));
+ Size = CheckedSizeOf (ParseType (Type));
ConsumeRParen ();
} else {
/* Remember the output queue pointer */
CodeMark Mark = GetCodePos ();
hie10 (Expr);
- Expr->ConstVal = CheckedSizeOf (Expr->Type);
+ Size = CheckedSizeOf (Expr->Type);
/* Remove any generated code */
RemoveCode (Mark);
}
- Expr->Flags = E_MCONST | E_TCONST | E_RVAL;
- Expr->Type = type_size_t;
+ ED_MakeConstAbs (Expr, Size, type_size_t);
Expr->Test &= ~E_CC;
break;
int* UsedGen)
/* Helper function */
{
- ExprDesc lval2;
+ ExprDesc Expr2;
CodeMark Mark1;
CodeMark Mark2;
const GenDesc* Gen;
- token_t Tok; /* The operator token */
+ token_t Tok; /* The operator token */
unsigned ltype, type;
int rconst; /* Operand is a constant */
/* Get the lhs on stack */
Mark1 = GetCodePos ();
ltype = TypeOf (Expr->Type);
- if (ED_IsRVal (Expr) && Expr->Flags == E_MCONST) {
+ if (ED_IsConstAbs (Expr)) {
/* Constant value */
Mark2 = GetCodePos ();
- g_push (ltype | CF_CONST, Expr->ConstVal);
+ g_push (ltype | CF_CONST, Expr->Val);
} else {
/* Value not constant */
ExprLoad (CF_NONE, Expr);
}
/* Get the right hand side */
- rconst = (evalexpr (CF_NONE, hienext, &lval2) == 0);
+ rconst = (evalexpr (CF_NONE, hienext, &Expr2) == 0);
/* Check the type of the rhs */
- if (!IsClassInt (lval2.Type)) {
+ if (!IsClassInt (Expr2.Type)) {
Error ("Integer expression expected");
}
/* Check for const operands */
- if (ED_IsRVal (Expr) && Expr->Flags == E_MCONST && rconst) {
+ if (ED_IsConstAbs (Expr) && rconst) {
/* Both operands are constant, remove the generated code */
RemoveCode (Mark1);
pop (ltype);
/* Evaluate the result */
- Expr->ConstVal = kcalc (Tok, Expr->ConstVal, lval2.ConstVal);
+ Expr->Val = kcalc (Tok, Expr->Val, Expr2.Val);
/* Get the type of the result */
- Expr->Type = promoteint (Expr->Type, lval2.Type);
+ Expr->Type = promoteint (Expr->Type, Expr2.Type);
} else {
* expects the lhs in the primary, remove the push of the primary
* now.
*/
- unsigned rtype = TypeOf (lval2.Type);
+ unsigned rtype = TypeOf (Expr2.Type);
type = 0;
if (rconst) {
/* Second value is constant - check for div */
type |= CF_CONST;
rtype |= CF_CONST;
- if (Tok == TOK_DIV && lval2.ConstVal == 0) {
+ if (Tok == TOK_DIV && Expr2.Val == 0) {
Error ("Division by zero");
- } else if (Tok == TOK_MOD && lval2.ConstVal == 0) {
+ } else if (Tok == TOK_MOD && Expr2.Val == 0) {
Error ("Modulo operation with zero");
}
if ((Gen->Flags & GEN_NOPUSH) != 0) {
/* Determine the type of the operation result. */
type |= g_typeadjust (ltype, rtype);
- Expr->Type = promoteint (Expr->Type, lval2.Type);
+ Expr->Type = promoteint (Expr->Type, Expr2.Type);
/* Generate code */
- Gen->Func (type, lval2.ConstVal);
+ Gen->Func (type, Expr2.Val);
/* We have a rvalue in the primary now */
- Expr->Flags = E_MEXPR | E_RVAL;
+ ED_MakeRValExpr (Expr);
}
}
}
void (*hienext) (ExprDesc*))
/* Helper function for the compare operators */
{
- ExprDesc lval2;
+ ExprDesc Expr2;
CodeMark Mark1;
CodeMark Mark2;
const GenDesc* Gen;
/* Get the lhs on stack */
Mark1 = GetCodePos ();
ltype = TypeOf (Expr->Type);
- if (ED_IsRVal (Expr) && Expr->Flags == E_MCONST) {
+ if (ED_IsConstAbs (Expr)) {
/* Constant value */
Mark2 = GetCodePos ();
- g_push (ltype | CF_CONST, Expr->ConstVal);
+ g_push (ltype | CF_CONST, Expr->Val);
} else {
/* Value not constant */
ExprLoad (CF_NONE, Expr);
}
/* Get the right hand side */
- rconst = (evalexpr (CF_NONE, hienext, &lval2) == 0);
+ rconst = (evalexpr (CF_NONE, hienext, &Expr2) == 0);
/* Make sure, the types are compatible */
if (IsClassInt (Expr->Type)) {
- if (!IsClassInt (lval2.Type) && !(IsClassPtr(lval2.Type) && IsNullPtr(Expr))) {
+ if (!IsClassInt (Expr2.Type) && !(IsClassPtr(Expr2.Type) && ED_IsNullPtr(Expr))) {
Error ("Incompatible types");
}
} else if (IsClassPtr (Expr->Type)) {
- if (IsClassPtr (lval2.Type)) {
+ if (IsClassPtr (Expr2.Type)) {
/* Both pointers are allowed in comparison if they point to
* the same type, or if one of them is a void pointer.
*/
type* left = Indirect (Expr->Type);
- type* right = Indirect (lval2.Type);
+ type* right = Indirect (Expr2.Type);
if (TypeCmp (left, right) < TC_EQUAL && *left != T_VOID && *right != T_VOID) {
/* Incomatible pointers */
Error ("Incompatible types");
}
- } else if (!IsNullPtr (&lval2)) {
+ } else if (!ED_IsNullPtr (&Expr2)) {
Error ("Incompatible types");
}
}
/* Check for const operands */
- if (ED_IsRVal (Expr) && Expr->Flags == E_MCONST && rconst) {
+ if (ED_IsConstAbs (Expr) && rconst) {
/* Both operands are constant, remove the generated code */
RemoveCode (Mark1);
pop (ltype);
/* Evaluate the result */
- Expr->ConstVal = kcalc (tok, Expr->ConstVal, lval2.ConstVal);
+ Expr->Val = kcalc (tok, Expr->Val, Expr2.Val);
} else {
* operation as char operation. Otherwise the default
* promotions are used.
*/
- if (IsTypeChar (Expr->Type) && (IsTypeChar (lval2.Type) || rconst)) {
+ if (IsTypeChar (Expr->Type) && (IsTypeChar (Expr2.Type) || rconst)) {
flags |= CF_CHAR;
- if (IsSignUnsigned (Expr->Type) || IsSignUnsigned (lval2.Type)) {
+ if (IsSignUnsigned (Expr->Type) || IsSignUnsigned (Expr2.Type)) {
flags |= CF_UNSIGNED;
}
if (rconst) {
flags |= CF_FORCECHAR;
}
} else {
- unsigned rtype = TypeOf (lval2.Type) | (flags & CF_CONST);
+ unsigned rtype = TypeOf (Expr2.Type) | (flags & CF_CONST);
flags |= g_typeadjust (ltype, rtype);
}
/* Generate code */
- Gen->Func (flags, lval2.ConstVal);
- Expr->Flags = E_MEXPR | E_RVAL;
+ Gen->Func (flags, Expr2.Val);
+
+ /* The result is an rvalue in the primary */
+ ED_MakeRValExpr (Expr);
}
/* Result type is always int */
* result of the expression on return.
*/
{
- ExprDesc lval2;
+ ExprDesc Expr2;
unsigned flags; /* Operation flags */
CodeMark Mark; /* Remember code position */
type* lhst; /* Type of left hand side */
flags = 0;
/* Check for constness on both sides */
- if (ED_IsRVal (Expr) && (Expr->Flags & E_MCONST) != 0) {
+ if (ED_IsConst (Expr)) {
- /* The left hand side is a constant. Good. Get rhs */
- hie9 (&lval2);
- if (ED_IsRVal (&lval2) && lval2.Flags == E_MCONST) {
+ /* The left hand side is a constant of some sort. Good. Get rhs */
+ hie9 (&Expr2);
+ if (ED_IsConstAbs (&Expr2)) {
- /* Right hand side is also constant. Get the rhs type */
- rhst = lval2.Type;
+ /* Right hand side is a constant numeric value. Get the rhs type */
+ rhst = Expr2.Type;
/* Both expressions are constants. Check for pointer arithmetic */
if (IsClassPtr (lhst) && IsClassInt (rhst)) {
/* Left is pointer, right is int, must scale rhs */
- Expr->ConstVal += lval2.ConstVal * CheckedPSizeOf (lhst);
+ Expr->Val += Expr2.Val * CheckedPSizeOf (lhst);
/* Result type is a pointer */
} else if (IsClassInt (lhst) && IsClassPtr (rhst)) {
/* Left is int, right is pointer, must scale lhs */
- Expr->ConstVal = Expr->ConstVal * CheckedPSizeOf (rhst) + lval2.ConstVal;
+ Expr->Val = Expr->Val * CheckedPSizeOf (rhst) + Expr2.Val;
/* Result type is a pointer */
- Expr->Type = lval2.Type;
+ Expr->Type = Expr2.Type;
} else if (IsClassInt (lhst) && IsClassInt (rhst)) {
/* Integer addition */
- Expr->ConstVal += lval2.ConstVal;
- typeadjust (Expr, &lval2, 1);
+ Expr->Val += Expr2.Val;
+ typeadjust (Expr, &Expr2, 1);
} else {
/* OOPS */
Error ("Invalid operands for binary operator `+'");
/* lhs is a constant and rhs is not constant. Load rhs into
* the primary.
*/
- ExprLoad (CF_NONE, &lval2);
+ ExprLoad (CF_NONE, &Expr2);
/* Beware: The check above (for lhs) lets not only pass numeric
* constants, but also constant addresses (labels), maybe even
*/
/* First, get the rhs type. */
- rhst = lval2.Type;
+ rhst = Expr2.Type;
/* Setup flags */
- if (Expr->Flags == E_MCONST) {
+ if (ED_IsLocAbs (Expr)) {
/* A numerical constant */
flags |= CF_CONST;
} else {
/* Operate on pointers, result type is a pointer */
flags |= CF_PTR;
/* Generate the code for the add */
- if (Expr->Flags == E_MCONST) {
+ if (ED_GetLoc (Expr) == E_LOC_ABS) {
/* Numeric constant */
- g_inc (flags, Expr->ConstVal);
+ g_inc (flags, Expr->Val);
} else {
/* Constant address */
- g_addaddr_static (flags, Expr->Name, Expr->ConstVal);
+ g_addaddr_static (flags, Expr->Name, Expr->Val);
}
} else if (IsClassInt (lhst) && IsClassPtr (rhst)) {
/* Operate on pointers, result type is a pointer */
flags |= CF_PTR;
- Expr->Type = lval2.Type;
+ Expr->Type = Expr2.Type;
/* Since we do already have rhs in the primary, if lhs is
* not a numeric constant, and the scale factor is not one
* (no scaling), we must take the long way over the stack.
*/
- if (Expr->Flags == E_MCONST) {
+ if (ED_IsLocAbs (Expr)) {
/* Numeric constant, scale lhs */
- Expr->ConstVal *= ScaleFactor;
+ Expr->Val *= ScaleFactor;
/* Generate the code for the add */
- g_inc (flags, Expr->ConstVal);
+ g_inc (flags, Expr->Val);
} else if (ScaleFactor == 1) {
/* Constant address but no need to scale */
- g_addaddr_static (flags, Expr->Name, Expr->ConstVal);
+ g_addaddr_static (flags, Expr->Name, Expr->Val);
} else {
/* Constant address that must be scaled */
- g_push (TypeOf (lval2.Type), 0); /* rhs --> stack */
- g_getimmed (flags, Expr->Name, Expr->ConstVal);
+ g_push (TypeOf (Expr2.Type), 0); /* rhs --> stack */
+ g_getimmed (flags, Expr->Name, Expr->Val);
g_scale (CF_PTR, ScaleFactor);
g_add (CF_PTR, 0);
}
} else if (IsClassInt (lhst) && IsClassInt (rhst)) {
/* Integer addition */
- flags |= typeadjust (Expr, &lval2, 1);
+ flags |= typeadjust (Expr, &Expr2, 1);
/* Generate the code for the add */
- if (Expr->Flags == E_MCONST) {
+ if (ED_IsLocAbs (Expr)) {
/* Numeric constant */
- g_inc (flags, Expr->ConstVal);
+ g_inc (flags, Expr->Val);
} else {
/* Constant address */
- g_addaddr_static (flags, Expr->Name, Expr->ConstVal);
+ g_addaddr_static (flags, Expr->Name, Expr->Val);
}
} else {
/* OOPS */
}
/* Result is a rvalue in primary register */
- Expr->Flags = E_MEXPR | E_RVAL;
+ ED_MakeRValExpr (Expr);
}
} else {
g_push (TypeOf (Expr->Type), 0); /* --> stack */
/* Evaluate the rhs */
- if (evalexpr (CF_NONE, hie9, &lval2) == 0) {
+ if (evalexpr (CF_NONE, hie9, &Expr2) == 0) {
/* Right hand side is a constant. Get the rhs type */
- rhst = lval2.Type;
+ rhst = Expr2.Type;
/* Remove pushed value from stack */
RemoveCode (Mark);
/* Check for pointer arithmetic */
if (IsClassPtr (lhst) && IsClassInt (rhst)) {
/* Left is pointer, right is int, must scale rhs */
- lval2.ConstVal *= CheckedPSizeOf (lhst);
+ Expr2.Val *= CheckedPSizeOf (lhst);
/* Operate on pointers, result type is a pointer */
flags = CF_PTR;
} else if (IsClassInt (lhst) && IsClassPtr (rhst)) {
g_scale (CF_INT | CF_CONST, CheckedPSizeOf (rhst));
/* Operate on pointers, result type is a pointer */
flags = CF_PTR;
- Expr->Type = lval2.Type;
+ Expr->Type = Expr2.Type;
} else if (IsClassInt (lhst) && IsClassInt (rhst)) {
/* Integer addition */
- flags = typeadjust (Expr, &lval2, 1);
+ flags = typeadjust (Expr, &Expr2, 1);
} else {
/* OOPS */
Error ("Invalid operands for binary operator `+'");
}
/* Generate code for the add */
- g_inc (flags | CF_CONST, lval2.ConstVal);
+ g_inc (flags | CF_CONST, Expr2.Val);
} else {
/* lhs and rhs are not constant. Get the rhs type. */
- rhst = lval2.Type;
+ rhst = Expr2.Type;
/* Check for pointer arithmetic */
if (IsClassPtr (lhst) && IsClassInt (rhst)) {
g_scale (CF_INT, CheckedPSizeOf (rhst));
/* Operate on pointers, result type is a pointer */
flags = CF_PTR;
- Expr->Type = lval2.Type;
+ Expr->Type = Expr2.Type;
} else if (IsClassInt (lhst) && IsClassInt (rhst)) {
/* Integer addition. Note: Result is never constant.
* Problem here is that typeadjust does not know if the
* whole parser is such a mess that I fear to break anything
* when trying to apply another solution.
*/
- flags = typeadjust (Expr, &lval2, 0) & ~CF_CONST;
+ flags = typeadjust (Expr, &Expr2, 0) & ~CF_CONST;
} else {
/* OOPS */
Error ("Invalid operands for binary operator `+'");
}
/* Result is a rvalue in primary register */
- Expr->Flags = E_MEXPR | E_RVAL;
+ ED_MakeRValExpr (Expr);
}
/* Condition codes not set */
* result of the expression on return.
*/
{
- ExprDesc lval2;
+ ExprDesc Expr2;
unsigned flags; /* Operation flags */
type* lhst; /* Type of left hand side */
type* rhst; /* Type of right hand side */
- CodeMark Mark1; /* Save position of output queue */
+ CodeMark Mark1; /* Save position of output queue */
CodeMark Mark2; /* Another position in the queue */
int rscale; /* Scale factor for the result */
g_push (TypeOf (lhst), 0); /* --> stack */
/* Parse the right hand side */
- if (evalexpr (CF_NONE, hie9, &lval2) == 0) {
+ if (evalexpr (CF_NONE, hie9, &Expr2) == 0) {
/* The right hand side is constant. Get the rhs type. */
- rhst = lval2.Type;
+ rhst = Expr2.Type;
/* Check left hand side */
- if (ED_IsRVal (Expr) && (Expr->Flags & E_MCONST) != 0) {
+ if (ED_IsConstAbs (Expr)) {
/* Both sides are constant, remove generated code */
RemoveCode (Mark1);
/* Check for pointer arithmetic */
if (IsClassPtr (lhst) && IsClassInt (rhst)) {
/* Left is pointer, right is int, must scale rhs */
- Expr->ConstVal -= lval2.ConstVal * CheckedPSizeOf (lhst);
+ Expr->Val -= Expr2.Val * CheckedPSizeOf (lhst);
/* Operate on pointers, result type is a pointer */
} else if (IsClassPtr (lhst) && IsClassPtr (rhst)) {
/* Left is pointer, right is pointer, must scale result */
if (TypeCmp (Indirect (lhst), Indirect (rhst)) < TC_QUAL_DIFF) {
Error ("Incompatible pointer types");
} else {
- Expr->ConstVal = (Expr->ConstVal - lval2.ConstVal) /
+ Expr->Val = (Expr->Val - Expr2.Val) /
CheckedPSizeOf (lhst);
}
/* Operate on pointers, result type is an integer */
Expr->Type = type_int;
} else if (IsClassInt (lhst) && IsClassInt (rhst)) {
/* Integer subtraction */
- typeadjust (Expr, &lval2, 1);
- Expr->ConstVal -= lval2.ConstVal;
+ typeadjust (Expr, &Expr2, 1);
+ Expr->Val -= Expr2.Val;
} else {
/* OOPS */
Error ("Invalid operands for binary operator `-'");
}
/* Result is constant, condition codes not set */
- /* Expr->Flags = E_MCONST; ### */
Expr->Test &= ~E_CC;
} else {
if (IsClassPtr (lhst) && IsClassInt (rhst)) {
/* Left is pointer, right is int, must scale rhs */
- lval2.ConstVal *= CheckedPSizeOf (lhst);
+ Expr2.Val *= CheckedPSizeOf (lhst);
/* Operate on pointers, result type is a pointer */
flags = CF_PTR;
} else if (IsClassPtr (lhst) && IsClassPtr (rhst)) {
Expr->Type = type_int;
} else if (IsClassInt (lhst) && IsClassInt (rhst)) {
/* Integer subtraction */
- flags = typeadjust (Expr, &lval2, 1);
+ flags = typeadjust (Expr, &Expr2, 1);
} else {
/* OOPS */
Error ("Invalid operands for binary operator `-'");
}
/* Do the subtraction */
- g_dec (flags | CF_CONST, lval2.ConstVal);
+ g_dec (flags | CF_CONST, Expr2.Val);
/* If this was a pointer subtraction, we must scale the result */
if (rscale != 1) {
}
/* Result is a rvalue in the primary register */
- Expr->Flags = E_MEXPR | E_RVAL;
+ ED_MakeRValExpr (Expr);
Expr->Test &= ~E_CC;
}
} else {
/* Right hand side is not constant. Get the rhs type. */
- rhst = lval2.Type;
+ rhst = Expr2.Type;
/* Check for pointer arithmetic */
if (IsClassPtr (lhst) && IsClassInt (rhst)) {
* the lhs is const, we have to remove this mark, since this is no
* longer true, lhs is on stack instead.
*/
- if (Expr->Flags == E_MCONST) {
- Expr->Flags = E_MEXPR | E_RVAL;
+ if (ED_IsLocAbs (Expr)) {
+ ED_MakeRValExpr (Expr);
}
/* Adjust operand types */
- flags = typeadjust (Expr, &lval2, 0);
+ flags = typeadjust (Expr, &Expr2, 0);
} else {
/* OOPS */
Error ("Invalid operands for binary operator `-'");
}
/* Result is a rvalue in the primary register */
- Expr->Flags = E_MEXPR | E_RVAL;
+ ED_MakeRValExpr (Expr);
Expr->Test &= ~E_CC;
}
}
-
static void hie7 (ExprDesc* Expr)
/* Parse << and >>. */
{
* called recursively from the preprocessor.
*/
{
- ExprDesc lval2;
+ ExprDesc Expr2;
- ConstSubExpr (hie2, Expr);
+ ConstAbsIntExpr (hie2, Expr);
while (CurTok.Tok == TOK_BOOL_AND) {
- /* Left hand side must be an int */
- if (!IsClassInt (Expr->Type)) {
- Error ("Left hand side must be of integer type");
- ED_MakeConstInt (Expr, 1);
- }
-
/* Skip the && */
NextToken ();
/* Get rhs */
- ConstSubExpr (hie2, &lval2);
-
- /* Since we are in PP mode, all we know about is integers */
- if (!IsClassInt (lval2.Type)) {
- Error ("Right hand side must be of integer type");
- ED_MakeConstInt (&lval2, 1);
- }
+ ConstAbsIntExpr (hie2, &Expr2);
/* Combine the two */
- Expr->ConstVal = (Expr->ConstVal && lval2.ConstVal);
+ Expr->Val = (Expr->Val && Expr2.Val);
}
}
* called recursively from the preprocessor.
*/
{
- ExprDesc lval2;
+ ExprDesc Expr2;
- ConstSubExpr (hieAndPP, Expr);
+ ConstAbsIntExpr (hieAndPP, Expr);
while (CurTok.Tok == TOK_BOOL_OR) {
- /* Left hand side must be an int */
- if (!IsClassInt (Expr->Type)) {
- Error ("Left hand side must be of integer type");
- ED_MakeConstInt (Expr, 1);
- }
-
/* Skip the && */
NextToken ();
/* Get rhs */
- ConstSubExpr (hieAndPP, &lval2);
-
- /* Since we are in PP mode, all we know about is integers */
- if (!IsClassInt (lval2.Type)) {
- Error ("Right hand side must be of integer type");
- ED_MakeConstInt (&lval2, 1);
- }
+ ConstAbsIntExpr (hieAndPP, &Expr2);
/* Combine the two */
- Expr->ConstVal = (Expr->ConstVal || lval2.ConstVal);
+ Expr->Val = (Expr->Val || Expr2.Val);
}
}
/* Process "exp && exp" */
{
int lab;
- ExprDesc lval2;
+ ExprDesc Expr2;
hie2 (Expr);
if (CurTok.Tok == TOK_BOOL_AND) {
NextToken ();
/* Get rhs */
- hie2 (&lval2);
- if ((lval2.Test & E_CC) == 0) {
- lval2.Test |= E_FORCETEST;
+ hie2 (&Expr2);
+ if ((Expr2.Test & E_CC) == 0) {
+ Expr2.Test |= E_FORCETEST;
}
- ExprLoad (CF_FORCECHAR, &lval2);
+ ExprLoad (CF_FORCECHAR, &Expr2);
/* Do short circuit evaluation */
if (CurTok.Tok == TOK_BOOL_AND) {
g_defcodelabel (lab);
/* The result is an rvalue in primary */
- Expr->Flags = E_MEXPR | E_RVAL;
+ ED_MakeRValExpr (Expr);
Expr->Test |= E_CC; /* Condition codes are set */
}
}
static void hieOr (ExprDesc *Expr)
/* Process "exp || exp". */
{
- ExprDesc lval2;
- int BoolOp = 0; /* Did we have a boolean op? */
- int AndOp; /* Did we have a && operation? */
- unsigned TrueLab; /* Jump to this label if true */
+ ExprDesc Expr2;
+ int BoolOp = 0; /* Did we have a boolean op? */
+ int AndOp; /* Did we have a && operation? */
+ unsigned TrueLab; /* Jump to this label if true */
unsigned DoneLab;
/* Get a label */
/* Get a subexpr */
AndOp = 0;
- hieAnd (&lval2, TrueLab, &AndOp);
- if ((lval2.Test & E_CC) == 0) {
- lval2.Test |= E_FORCETEST;
+ hieAnd (&Expr2, TrueLab, &AndOp);
+ if ((Expr2.Test & E_CC) == 0) {
+ Expr2.Test |= E_FORCETEST;
}
- ExprLoad (CF_FORCECHAR, &lval2);
+ ExprLoad (CF_FORCECHAR, &Expr2);
/* If there is more to come, add shortcut boolean eval. */
g_truejump (CF_NONE, TrueLab);
}
/* The result is an rvalue in primary */
- Expr->Flags = E_MEXPR | E_RVAL;
+ ED_MakeRValExpr (Expr);
Expr->Test |= E_CC; /* Condition codes are set */
}
/* Parse second expression. Remember for later if it is a NULL pointer
* expression, then load it into the primary.
*/
- expr (hie1, &Expr2);
- Expr2IsNULL = IsNullPtr (&Expr2);
+ ExprWithCheck (hie1, &Expr2);
+ Expr2IsNULL = ED_IsNullPtr (&Expr2);
if (!IsTypeVoid (Expr2.Type)) {
/* Load it into the primary */
ExprLoad (CF_NONE, &Expr2);
- Expr2.Flags = E_MEXPR | E_RVAL;
+ ED_MakeRValExpr (&Expr2);
}
labt = GetLocalLabel ();
ConsumeColon ();
/* Parse second expression. Remember for later if it is a NULL pointer
* expression, then load it into the primary.
*/
- expr (hie1, &Expr3);
- Expr3IsNULL = IsNullPtr (&Expr3);
+ ExprWithCheck (hie1, &Expr3);
+ Expr3IsNULL = ED_IsNullPtr (&Expr3);
if (!IsTypeVoid (Expr3.Type)) {
/* Load it into the primary */
ExprLoad (CF_NONE, &Expr3);
- Expr3.Flags = E_MEXPR | E_RVAL;
+ ED_MakeRValExpr (&Expr3);
}
/* Check if any conversions are needed, if so, do them.
}
/* Setup the target expression */
- Expr->Flags = E_MEXPR | E_RVAL;
+ ED_MakeRValExpr (Expr);
Expr->Type = ResultType;
}
}
static void opeq (const GenDesc* Gen, ExprDesc* Expr)
/* Process "op=" operators. */
{
- ExprDesc lval2;
+ ExprDesc Expr2;
unsigned flags;
CodeMark Mark;
int MustScale;
- NextToken ();
- if (ED_IsRVal (Expr)) {
+ /* op= can only be used with lvalues */
+ if (!ED_IsLVal (Expr)) {
Error ("Invalid lvalue in assignment");
return;
}
+ /* There must be an integer or pointer on the left side */
+ if (!IsClassInt (Expr->Type) && !IsTypePtr (Expr->Type)) {
+ Error ("Invalid left operand type");
+ /* Continue. Wrong code will be generated, but the compiler won't
+ * break, so this is the best error recovery.
+ */
+ }
+
+ /* Skip the operator token */
+ NextToken ();
+
/* Determine the type of the lhs */
flags = TypeOf (Expr->Type);
- MustScale = (Gen->Func == g_add || Gen->Func == g_sub) &&
- Expr->Type [0] == T_PTR;
+ MustScale = (Gen->Func == g_add || Gen->Func == g_sub) && IsTypePtr (Expr->Type);
/* Get the lhs address on stack (if needed) */
PushAddr (Expr);
g_push (flags, 0);
/* Evaluate the rhs */
- if (evalexpr (CF_NONE, hie1, &lval2) == 0) {
+ if (evalexpr (CF_NONE, hie1, &Expr2) == 0) {
/* The resulting value is a constant. If the generator has the NOPUSH
* flag set, don't push the lhs.
*/
}
if (MustScale) {
/* lhs is a pointer, scale rhs */
- lval2.ConstVal *= CheckedSizeOf (Expr->Type+1);
+ Expr2.Val *= CheckedSizeOf (Expr->Type+1);
}
/* If the lhs is character sized, the operation may be later done
/* Special handling for add and sub - some sort of a hack, but short code */
if (Gen->Func == g_add) {
- g_inc (flags | CF_CONST, lval2.ConstVal);
+ g_inc (flags | CF_CONST, Expr2.Val);
} else if (Gen->Func == g_sub) {
- g_dec (flags | CF_CONST, lval2.ConstVal);
+ g_dec (flags | CF_CONST, Expr2.Val);
} else {
- Gen->Func (flags | CF_CONST, lval2.ConstVal);
+ Gen->Func (flags | CF_CONST, Expr2.Val);
}
} else {
/* rhs is not constant and already in the primary register */
if (MustScale) {
/* lhs is a pointer, scale rhs */
- g_scale (TypeOf (lval2.Type), CheckedSizeOf (Expr->Type+1));
+ g_scale (TypeOf (Expr2.Type), CheckedSizeOf (Expr->Type+1));
}
/* If the lhs is character sized, the operation may be later done
}
/* Adjust the types of the operands if needed */
- Gen->Func (g_typeadjust (flags, TypeOf (lval2.Type)), 0);
+ Gen->Func (g_typeadjust (flags, TypeOf (Expr2.Type)), 0);
}
Store (Expr, 0);
- Expr->Flags = E_MEXPR | E_RVAL;
+ ED_MakeRValExpr (Expr);
}
static void addsubeq (const GenDesc* Gen, ExprDesc *Expr)
/* Process the += and -= operators */
{
- ExprDesc lval2;
+ ExprDesc Expr2;
unsigned lflags;
unsigned rflags;
int MustScale;
+ /* We're currently only able to handle some adressing modes */
+ if (ED_GetLoc (Expr) == E_LOC_EXPR || ED_GetLoc (Expr) == E_LOC_PRIMARY) {
+ /* Use generic routine */
+ opeq (Gen, Expr);
+ return;
+ }
+
/* We must have an lvalue */
if (ED_IsRVal (Expr)) {
Error ("Invalid lvalue in assignment");
return;
}
- /* We're currently only able to handle some adressing modes */
- if ((Expr->Flags & E_MGLOBAL) == 0 && /* Global address? */
- (Expr->Flags & E_MLOCAL) == 0 && /* Local address? */
- (Expr->Flags & E_MCONST) == 0) { /* Constant address? */
- /* Use generic routine */
- opeq (Gen, Expr);
- return;
+ /* There must be an integer or pointer on the left side */
+ if (!IsClassInt (Expr->Type) && !IsTypePtr (Expr->Type)) {
+ Error ("Invalid left operand type");
+ /* Continue. Wrong code will be generated, but the compiler won't
+ * break, so this is the best error recovery.
+ */
}
/* Skip the operator */
NextToken ();
/* Check if we have a pointer expression and must scale rhs */
- MustScale = (Expr->Type [0] == T_PTR);
+ MustScale = IsTypePtr (Expr->Type);
/* Initialize the code generator flags */
lflags = 0;
rflags = 0;
/* Evaluate the rhs */
- hie1 (&lval2);
- if (ED_IsRVal (&lval2) && lval2.Flags == E_MCONST) {
- /* The resulting value is a constant. */
- if (MustScale) {
- /* lhs is a pointer, scale rhs */
- lval2.ConstVal *= CheckedSizeOf (Expr->Type+1);
- }
+ hie1 (&Expr2);
+ if (ED_IsConstAbs (&Expr2)) {
+ /* The resulting value is a constant. Scale it. */
+ if (MustScale) {
+ Expr2.Val *= CheckedSizeOf (Indirect (Expr->Type));
+ }
rflags |= CF_CONST;
lflags |= CF_CONST;
} else {
/* Not constant, load into the primary */
- ExprLoad (CF_NONE, &lval2);
+ ExprLoad (CF_NONE, &Expr2);
if (MustScale) {
/* lhs is a pointer, scale rhs */
- g_scale (TypeOf (lval2.Type), CheckedSizeOf (Expr->Type+1));
+ g_scale (TypeOf (Expr2.Type), CheckedSizeOf (Indirect (Expr->Type)));
}
}
/* Setup the code generator flags */
lflags |= TypeOf (Expr->Type) | CF_FORCECHAR;
- rflags |= TypeOf (lval2.Type);
+ rflags |= TypeOf (Expr2.Type);
/* Convert the type of the lhs to that of the rhs */
g_typecast (lflags, rflags);
- /* Output apropriate code */
- if (Expr->Flags & E_MGLOBAL) {
- /* Static variable */
- lflags |= GlobalModeFlags (Expr->Flags);
- if (Gen->Tok == TOK_PLUS_ASSIGN) {
- g_addeqstatic (lflags, Expr->Name, Expr->ConstVal, lval2.ConstVal);
- } else {
- g_subeqstatic (lflags, Expr->Name, Expr->ConstVal, lval2.ConstVal);
- }
- } else if (Expr->Flags & E_MLOCAL) {
- /* ref to localvar */
- if (Gen->Tok == TOK_PLUS_ASSIGN) {
- g_addeqlocal (lflags, Expr->ConstVal, lval2.ConstVal);
- } else {
- g_subeqlocal (lflags, Expr->ConstVal, lval2.ConstVal);
- }
- } else if (Expr->Flags & E_MCONST) {
- /* ref to absolute address */
- lflags |= CF_ABSOLUTE;
- if (Gen->Tok == TOK_PLUS_ASSIGN) {
- g_addeqstatic (lflags, Expr->ConstVal, 0, lval2.ConstVal);
- } else {
- g_subeqstatic (lflags, Expr->ConstVal, 0, lval2.ConstVal);
- }
- } else if (Expr->Flags & E_MEXPR) {
- /* Address in a/x. */
- if (Gen->Tok == TOK_PLUS_ASSIGN) {
- g_addeqind (lflags, Expr->ConstVal, lval2.ConstVal);
- } else {
- g_subeqind (lflags, Expr->ConstVal, lval2.ConstVal);
- }
- } else {
- Internal ("Invalid addressing mode");
+ /* Output apropriate code depending on the location */
+ switch (ED_GetLoc (Expr)) {
+
+ case E_LOC_ABS:
+ /* Absolute: numeric address or const */
+ lflags |= CF_ABSOLUTE;
+ if (Gen->Tok == TOK_PLUS_ASSIGN) {
+ g_addeqstatic (lflags, Expr->Name, Expr->Val, Expr2.Val);
+ } else {
+ g_subeqstatic (lflags, Expr->Name, Expr->Val, Expr2.Val);
+ }
+ break;
+
+ case E_LOC_GLOBAL:
+ /* Global variable */
+ lflags |= CF_EXTERNAL;
+ if (Gen->Tok == TOK_PLUS_ASSIGN) {
+ g_addeqstatic (lflags, Expr->Name, Expr->Val, Expr2.Val);
+ } else {
+ g_subeqstatic (lflags, Expr->Name, Expr->Val, Expr2.Val);
+ }
+ break;
+
+ case E_LOC_STATIC:
+ /* Static variable */
+ lflags |= CF_STATIC;
+ if (Gen->Tok == TOK_PLUS_ASSIGN) {
+ g_addeqstatic (lflags, Expr->Name, Expr->Val, Expr2.Val);
+ } else {
+ g_subeqstatic (lflags, Expr->Name, Expr->Val, Expr2.Val);
+ }
+ break;
+
+ case E_LOC_REGISTER:
+ /* Register variable */
+ lflags |= CF_REGVAR;
+ if (Gen->Tok == TOK_PLUS_ASSIGN) {
+ g_addeqstatic (lflags, Expr->Name, Expr->Val, Expr2.Val);
+ } else {
+ g_subeqstatic (lflags, Expr->Name, Expr->Val, Expr2.Val);
+ }
+ break;
+
+ case E_LOC_STACK:
+ /* Value on the stack */
+ if (Gen->Tok == TOK_PLUS_ASSIGN) {
+ g_addeqlocal (lflags, Expr->Val, Expr2.Val);
+ } else {
+ g_subeqlocal (lflags, Expr->Val, Expr2.Val);
+ }
+ break;
+
+ case E_LOC_LITERAL:
+ /* Literal in the literal pool */
+ lflags |= CF_STATIC;
+ if (Gen->Tok == TOK_PLUS_ASSIGN) {
+ g_addeqstatic (lflags, LiteralPoolLabel, Expr->Val, Expr2.Val);
+ } else {
+ g_subeqstatic (lflags, LiteralPoolLabel, Expr->Val, Expr2.Val);
+ }
+ break;
+
+ default:
+ Internal ("Invalid location in Store(): 0x%04X", ED_GetLoc (Expr));
}
/* Expression is a rvalue in the primary now */
- Expr->Flags = E_MEXPR | E_RVAL;
+ ED_MakeRValExpr (Expr);
}
*/
{
/* Evaluate */
- Func (Expr);
+ ExprWithCheck (Func, Expr);
/* Check for a constant expression */
- if (ED_IsRVal (Expr) && Expr->Flags == E_MCONST) {
+ if (ED_IsConstAbs (Expr)) {
/* Constant expression */
return 0;
} else {
-void expr (void (*Func) (ExprDesc*), ExprDesc *Expr)
-/* Expression parser; func is either hie0 or hie1. */
-{
- /* Remember the stack pointer */
- int savsp = oursp;
-
- /* Call the expression function */
- (*Func) (Expr);
-
- /* Do some checks if code generation is still constistent */
- if (savsp != oursp) {
- if (Debug) {
- fprintf (stderr, "oursp != savesp (%d != %d)\n", oursp, savsp);
- } else {
- Internal ("oursp != savsp (%d != %d)", oursp, savsp);
- }
- }
-}
-
-
-
-void expression1 (ExprDesc* Expr)
-/* Evaluate an expression on level 1 (no comma operator) and put it into
- * the primary register
- */
+void Expression0 (ExprDesc* Expr)
+/* Evaluate an expression via hie0 and put the result into the primary register */
{
- expr (hie1, InitExprDesc (Expr));
+ ExprWithCheck (hie0, Expr);
ExprLoad (CF_NONE, Expr);
}
-void expression0 (ExprDesc* Expr)
-/* Evaluate an expression via hie0 and put it into the primary register */
-{
- expr (hie0, InitExprDesc (Expr));
- ExprLoad (CF_NONE, Expr);
-}
-
-
-
-void ConstExpr (ExprDesc* Expr)
-/* Get a constant value */
+void ConstExpr (void (*Func) (ExprDesc*), ExprDesc* Expr)
+/* Will evaluate an expression via the given function. If the result is not
+ * a constant of some sort, a diagnostic will be printed, and the value is
+ * replaced by a constant one to make sure there are no internal errors that
+ * result from this input error.
+ */
{
- expr (hie1, InitExprDesc (Expr));
- if (ED_IsLVal (Expr) || (Expr->Flags & E_MCONST) == 0) {
+ ExprWithCheck (Func, Expr);
+ if (!ED_IsConst (Expr)) {
Error ("Constant expression expected");
/* To avoid any compiler errors, make the expression a valid const */
- ED_MakeConstInt (Expr, 1);
+ ED_MakeConstAbsInt (Expr, 1);
}
}
-void ConstIntExpr (ExprDesc* Expr)
-/* Get a constant int value */
+void BoolExpr (void (*Func) (ExprDesc*), ExprDesc* Expr)
+/* Will evaluate an expression via the given function. If the result is not
+ * something that may be evaluated in a boolean context, a diagnostic will be
+ * printed, and the value is replaced by a constant one to make sure there
+ * are no internal errors that result from this input error.
+ */
{
- expr (hie1, InitExprDesc (Expr));
- if (ED_IsLVal (Expr) || (Expr->Flags & E_MCONST) == 0 || !IsClassInt (Expr->Type)) {
- Error ("Constant integer expression expected");
- /* To avoid any compiler errors, make the expression a valid const */
- ED_MakeConstInt (Expr, 1);
+ ExprWithCheck (Func, Expr);
+ if (!ED_IsBool (Expr)) {
+ Error ("Boolean expression expected");
+ /* To avoid any compiler errors, make the expression a valid int */
+ ED_MakeConstAbsInt (Expr, 1);
}
}
-void intexpr (ExprDesc* lval)
-/* Get an integer expression */
+void ConstAbsIntExpr (void (*Func) (ExprDesc*), ExprDesc* Expr)
+/* Will evaluate an expression via the given function. If the result is not
+ * a constant numeric integer value, a diagnostic will be printed, and the
+ * value is replaced by a constant one to make sure there are no internal
+ * errors that result from this input error.
+ */
{
- expression0 (lval);
- if (!IsClassInt (lval->Type)) {
- Error ("Integer expression expected");
- /* To avoid any compiler errors, make the expression a valid int */
- ED_MakeConstInt (lval, 1);
+ ExprWithCheck (Func, Expr);
+ if (!ED_IsConstAbsInt (Expr)) {
+ Error ("Constant integer expression expected");
+ /* To avoid any compiler errors, make the expression a valid const */
+ ED_MakeConstAbsInt (Expr, 1);
}
}
projects / cc65 / commitdiff