return s;
}
-/*------------------------------------------------------------------*/
-/* copyStruct - copies a structdef including the fields-list */
-/*------------------------------------------------------------------*/
-static structdef *
-copyStruct (structdef *src)
-{
- structdef *dest;
-
- dest = newStruct ("");
- memcpy (dest, src, sizeof (structdef));
- dest->fields = copySymbolChain (src->fields);
- return dest;
-}
-
/*------------------------------------------------------------------*/
/* sclsFromPtr - Return the storage class a pointer points into. */
/* S_FIXED is returned for generic pointers or other */
}
/*------------------------------------------------------------------*/
-/* getSize - returns size of a type chain in bits */
+/* getSize - returns size of a type chain in bytes */
/*------------------------------------------------------------------*/
unsigned int
getSize (sym_link * p)
}
}
-/*---------------------------------------------------------------------*/
-/* getAllocSize - returns size of a type chain in bytes for allocation */
-/*---------------------------------------------------------------------*/
-unsigned int
-getAllocSize (sym_link *p)
+/*------------------------------------------------------------------*/
+/* checkStructFlexArray - check tree behind a struct */
+/*------------------------------------------------------------------*/
+static bool
+checkStructFlexArray (symbol *sym, sym_link *p)
{
- if (IS_STRUCT (p) && SPEC_STRUCT (p)->type == STRUCT)
- {
- /* if this is a struct specifier then */
- /* calculate the size as it could end */
- /* with an array of unspecified length */
- symbol *sflds = SPEC_STRUCT (p)->fields;
+ /* if nothing return FALSE */
+ if (!p)
+ return FALSE;
- while (sflds && sflds->next)
- sflds = sflds->next;
+ if (IS_SPEC (p))
+ {
+ /* (nested) struct with flexible array member? */
+ if (IS_STRUCT (p) && SPEC_STRUCT (p)->b_flexArrayMember)
+ {
+ werror (W_INVALID_FLEXARRAY);
+ return FALSE;
+ }
+ return FALSE;
+ }
- if (sflds && !IS_BITFIELD (sflds->type))
- return sflds->offset + getAllocSize (sflds->type);
- else
- return SPEC_STRUCT (p)->size;
+ /* this is a declarator */
+ if (IS_ARRAY (p))
+ {
+ /* flexible array member? */
+ if (!DCL_ELEM(p))
+ {
+ if (!options.std_c99)
+ werror (W_C89_NO_FLEXARRAY);
+ return TRUE;
+ }
+ /* walk tree */
+ return checkStructFlexArray (sym, p->next);
}
- else
- return getSize (p);
+ return FALSE;
}
/*------------------------------------------------------------------*/
bitOffset += loop->bitVar;
}
else {
- /* does not fit; need to realign first */
- sum++;
- loop->offset = (su == UNION ? sum = 0 : sum);
- bitOffset = 0;
- SPEC_BSTR (loop->etype) = bitOffset;
- bitOffset += loop->bitVar;
+ if( TARGET_IS_PIC16 && getenv("PIC16_PACKED_BITFIELDS") ) {
+ /* if PIC16 && enviroment variable is set, then
+ * tightly pack bitfields, this means that when a
+ * bitfield goes beyond byte alignment, do not
+ * automatically start allocatint from next byte,
+ * but also use the available bits first */
+ fprintf(stderr, ": packing bitfields in structures\n");
+ SPEC_BSTR (loop->etype) = bitOffset;
+ bitOffset += loop->bitVar;
+ loop->offset = (su == UNION ? sum = 0 : sum);
+ } else {
+ /* does not fit; need to realign first */
+ sum++;
+ loop->offset = (su == UNION ? sum = 0 : sum);
+ bitOffset = 0;
+ SPEC_BSTR (loop->etype) = bitOffset;
+ bitOffset += loop->bitVar;
+ }
}
while (bitOffset>8) {
bitOffset -= 8;
loop->offset = sum;
checkDecl (loop, 1);
sum += getSize (loop->type);
+
+ /* search for "flexibel array members" */
+ /* and do some syntax checks */
+ if ( su == STRUCT
+ && checkStructFlexArray (loop, loop->type))
+ {
+ /* found a "flexible array member" */
+ sdef->b_flexArrayMember = TRUE;
+ /* is another struct-member following? */
+ if (loop->next)
+ werror (E_FLEXARRAY_NOTATEND);
+ /* is it the first struct-member? */
+ else if (loop == sdef->fields)
+ werror (E_FLEXARRAY_INEMPTYSTRCT);
+ }
}
loop = loop->next;
fprintf (stderr, "checkSClass: %s \n", sym->name);
}
- /* type is literal can happen for enums change
- to auto */
+ /* type is literal can happen for enums change to auto */
if (SPEC_SCLS (sym->etype) == S_LITERAL && !SPEC_ENUM (sym->etype))
SPEC_SCLS (sym->etype) = S_AUTO;
{
sym_link *head, *curr, *loop;
+ /* note: v_struct and v_struct->fields are not copied! */
curr = p;
head = loop = (curr ? newLink (p->class) : (void *) NULL);
while (curr)
{
memcpy (loop, curr, sizeof (sym_link)); /* copy it */
- if (IS_STRUCT (loop))
- SPEC_STRUCT (loop) = copyStruct (SPEC_STRUCT (loop));
loop->next = (curr->next ? newLink (curr->next->class) : (void *) NULL);
loop = loop->next;
curr = curr->next;
}
else if (IS_CHAR (reType))
{
- if (op == '|' || op == '^')
- return computeTypeOr (etype1, etype2, reType);
- else if ( op == '&'
- && SPEC_USIGN (etype1) != SPEC_USIGN (etype2))
- {
- SPEC_USIGN (reType) = 1;
- return rType;
- }
- else if (op == '*')
- {
- SPEC_NOUN (reType) = V_INT;
- SPEC_USIGN (reType) = 0;
- return rType;
- }
- /* TODO: should be in SDCCast.c */
- else if ( op == '/'
- && ( !SPEC_USIGN (etype1)
- || !SPEC_USIGN (etype2)))
+ /* promotion of some special cases */
+ switch (op)
{
- SPEC_NOUN (reType) = V_INT;
- SPEC_USIGN (reType) = 0;
- return rType;
+ case '|':
+ case '^':
+ return computeTypeOr (etype1, etype2, reType);
+ case '&':
+ if (SPEC_USIGN (etype1) != SPEC_USIGN (etype2))
+ {
+ SPEC_USIGN (reType) = 1;
+ return rType;
+ }
+ break;
+ case '*':
+ SPEC_NOUN (reType) = V_INT;
+ SPEC_USIGN (reType) = 0;
+ return rType;
+ case '/':
+ /* if both are unsigned char then no promotion required */
+ if (!(SPEC_USIGN (etype1) && SPEC_USIGN (etype2)))
+ {
+ SPEC_NOUN (reType) = V_INT;
+ SPEC_USIGN (reType) = 0;
+ return rType;
+ }
+ break;
+ default:
+ break;
}
}
break;
&& ( (SPEC_USIGN (etype1)
/* if this operand is promoted to a larger type,
then it will be promoted to a signed type */
- && !(getSize (etype1) < getSize (reType))
+ && !(bitsForType (etype1) < bitsForType (reType))
/* char require special handling */
&& !IS_CHAR (etype1))
|| /* same for 2nd operand */
(SPEC_USIGN (etype2)
- && !(getSize (etype2) < getSize (reType))
+ && !(bitsForType (etype2) < bitsForType (reType))
&& !IS_CHAR (etype2))
|| /* if both are 'unsigned char' and not promoted
let the result be unsigned too */
}
}
+/*-----------------------------------------------------------------*/
+/* processFuncPtrArgs - does some processing with args of func ptrs*/
+/*-----------------------------------------------------------------*/
+void
+processFuncPtrArgs (sym_link * funcType)
+{
+ value *val = FUNC_ARGS(funcType);
+
+ /* if it is void then remove parameters */
+ if (val && IS_VOID (val->type))
+ {
+ FUNC_ARGS(funcType) = NULL;
+ return;
+ }
+}
+
/*-----------------------------------------------------------------*/
/* processFuncArgs - does some processing with function args */
/*-----------------------------------------------------------------*/
/* powof2 - returns power of two for the number if number is pow 2 */
/*-----------------------------------------------------------------*/
int
-powof2 (TYPE_UDWORD num)
+powof2 (TYPE_TARGET_ULONG num)
{
int nshifts = 0;
int n1s = 0;
{
for (muldivmod = 1; muldivmod < 3; muldivmod++)
{
- /* div and mod */
- SNPRINTF (buffer, sizeof(buffer),
- "_%s%s%s",
- smuldivmod[muldivmod],
- ssu[su],
- sbwd[bwd]);
- __muldiv[muldivmod][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
- FUNC_NONBANKED (__muldiv[muldivmod][bwd][su]->type) = 1;
+ /* div and mod : s8_t x s8_t -> s8_t should be s8_t x s8_t -> s16_t, see below */
+ if (!TARGET_IS_PIC16 || muldivmod != 1 || bwd != 0 || su != 0)
+ {
+ SNPRINTF (buffer, sizeof(buffer),
+ "_%s%s%s",
+ smuldivmod[muldivmod],
+ ssu[su],
+ sbwd[bwd]);
+ __muldiv[muldivmod][bwd][su] = funcOfType (
+ _mangleFunctionName(buffer),
+ __multypes[bwd][su],
+ __multypes[bwd][su],
+ 2,
+ options.intlong_rent);
+ FUNC_NONBANKED (__muldiv[muldivmod][bwd][su]->type) = 1;
+ }
}
}
}
+
+ if (TARGET_IS_PIC16)
+ {
+ /* PIC16 port wants __divschar/__modschar to return an int, so that both
+ * 100 / -4 = -25 and -128 / -1 = 128 can be handled correctly
+ * (first one would have to be sign extended, second one must not be).
+ * Similarly, modschar should be handled, but the iCode introduces cast
+ * here and forces '% : s8 x s8 -> s8' ... */
+ su = 0; bwd = 0;
+ for (muldivmod = 1; muldivmod < 2; muldivmod++) {
+ SNPRINTF (buffer, sizeof(buffer),
+ "_%s%s%s",
+ smuldivmod[muldivmod],
+ ssu[su],
+ sbwd[bwd]);
+ __muldiv[muldivmod][bwd][su] = funcOfType (
+ _mangleFunctionName(buffer),
+ __multypes[1][su],
+ __multypes[bwd][su],
+ 2,
+ options.intlong_rent);
+ FUNC_NONBANKED (__muldiv[muldivmod][bwd][su]->type) = 1;
+ }
+ }
+
/* mul only */
muldivmod = 0;
/* byte */
" expected %s, got %s\n",
macro, args, file, line,
DECLSPEC2TXT(select), l ? DECLSPEC2TXT(l->class) : "null-link");
- exit(-1);
+ exit(EXIT_FAILURE);
return l; // never reached, makes compiler happy.
}
projects / fw / sdcc / blobdiff