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Allow initialization of local variables of compound type
git-svn-id: svn://svn.cc65.org/cc65/trunk@1458 b7a2c559-68d2-44c3-8de9-860c34a00d81
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cuz
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dcdaf8fd49
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@ -450,7 +450,7 @@ void g_leave (void)
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{
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/* How many bytes of locals do we have to drop? */
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int k = -oursp;
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/* If we didn't have a variable argument list, don't call leave */
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if (funcargs >= 0) {
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@ -598,25 +598,25 @@ void g_getimmed (unsigned Flags, unsigned long Val, long Offs)
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break;
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case CF_LONG:
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/* Split the value into 4 bytes */
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B1 = (unsigned char) (Val >> 0);
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B2 = (unsigned char) (Val >> 8);
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B3 = (unsigned char) (Val >> 16);
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B4 = (unsigned char) (Val >> 24);
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/* Split the value into 4 bytes */
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B1 = (unsigned char) (Val >> 0);
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B2 = (unsigned char) (Val >> 8);
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B3 = (unsigned char) (Val >> 16);
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B4 = (unsigned char) (Val >> 24);
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/* Remember which bytes are done */
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Done = 0;
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/* Remember which bytes are done */
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Done = 0;
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/* Load the value */
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AddCodeLine ("ldx #$%02X", B2);
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Done |= 0x02;
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if (B2 == B3) {
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AddCodeLine ("stx sreg");
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Done |= 0x04;
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}
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if (B2 == B4) {
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AddCodeLine ("stx sreg+1");
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Done |= 0x08;
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/* Load the value */
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AddCodeLine ("ldx #$%02X", B2);
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Done |= 0x02;
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if (B2 == B3) {
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AddCodeLine ("stx sreg");
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Done |= 0x04;
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}
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if (B2 == B4) {
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AddCodeLine ("stx sreg+1");
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Done |= 0x08;
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}
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if ((Done & 0x04) == 0 && B1 != B3) {
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AddCodeLine ("lda #$%02X", B3);
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@ -3913,6 +3913,65 @@ void g_zerobytes (unsigned n)
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void g_initauto (unsigned Label, unsigned Size)
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/* Initialize a local variable at stack offset zero from static data */
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{
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unsigned CodeLabel = GetLocalLabel ();
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CheckLocalOffs (Size);
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if (Size <= 128) {
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ldyconst (Size-1);
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g_defcodelabel (CodeLabel);
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AddCodeLine ("lda %s,y", GetLabelName (CF_STATIC, Label, 0));
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AddCodeLine ("sta (sp),y");
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AddCodeLine ("dey");
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AddCodeLine ("bpl %s", LocalLabelName (CodeLabel));
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} else if (Size <= 256) {
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ldyconst (0);
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g_defcodelabel (CodeLabel);
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AddCodeLine ("lda %s,y", GetLabelName (CF_STATIC, Label, 0));
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AddCodeLine ("sta (sp),y");
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AddCodeLine ("iny");
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AddCodeLine ("cpy #$%02X", (unsigned char) Size);
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AddCodeLine ("bne %s", LocalLabelName (CodeLabel));
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}
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}
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void g_initstatic (unsigned InitLabel, unsigned VarLabel, unsigned Size)
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/* Initialize a static local variable from static initialization data */
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{
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if (Size <= 128) {
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unsigned CodeLabel = GetLocalLabel ();
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ldyconst (Size-1);
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g_defcodelabel (CodeLabel);
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AddCodeLine ("lda %s,y", GetLabelName (CF_STATIC, InitLabel, 0));
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AddCodeLine ("sta %s,y", GetLabelName (CF_STATIC, VarLabel, 0));
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AddCodeLine ("dey");
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AddCodeLine ("bpl %s", LocalLabelName (CodeLabel));
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} else if (Size <= 256) {
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unsigned CodeLabel = GetLocalLabel ();
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ldyconst (0);
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g_defcodelabel (CodeLabel);
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AddCodeLine ("lda %s,y", GetLabelName (CF_STATIC, InitLabel, 0));
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AddCodeLine ("sta %s,y", GetLabelName (CF_STATIC, VarLabel, 0));
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AddCodeLine ("iny");
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AddCodeLine ("cpy #$%02X", (unsigned char) Size);
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AddCodeLine ("bne %s", LocalLabelName (CodeLabel));
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} else {
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/* Use the easy way here: memcpy */
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g_getimmed (CF_STATIC, VarLabel, 0);
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AddCodeLine ("jsr pushax");
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g_getimmed (CF_STATIC, InitLabel, 0);
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AddCodeLine ("jsr pushax");
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g_getimmed (CF_INT | CF_UNSIGNED | CF_CONST, Size, 0);
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AddCodeLine ("jsr %s", GetLabelName (CF_EXTERNAL, (unsigned long) "memcpy", 0));
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}
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}
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/*****************************************************************************/
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/* Switch statement */
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/*****************************************************************************/
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@ -6,7 +6,7 @@
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/* */
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/* */
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/* */
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/* (C) 1998-2001 Ullrich von Bassewitz */
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/* (C) 1998-2002 Ullrich von Bassewitz */
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/* Wacholderweg 14 */
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/* D-70597 Stuttgart */
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/* EMail: uz@cc65.org */
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@ -429,6 +429,12 @@ void g_defbytes (const void* bytes, unsigned count);
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void g_zerobytes (unsigned n);
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/* Output n bytes of data initialized with zero */
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void g_initauto (unsigned Label, unsigned Size);
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/* Initialize a local variable at stack offset zero from static data */
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void g_initstatic (unsigned InitLabel, unsigned VarLabel, unsigned Size);
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/* Initialize a static local variable from static initialization data */
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/*****************************************************************************/
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@ -141,6 +141,10 @@ static unsigned ParseAutoDecl (Declaration* Decl, unsigned Size, unsigned* SC)
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{
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unsigned Flags;
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unsigned SymData;
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unsigned InitLabel;
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/* Determine if this is a compound variable */
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int IsCompound = IsClassStruct (Decl->Type) || IsTypeArray (Decl->Type);
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/* Check if this is a variable on the stack or in static memory */
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if (StaticLocals == 0) {
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@ -151,27 +155,57 @@ static unsigned ParseAutoDecl (Declaration* Decl, unsigned Size, unsigned* SC)
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ExprDesc lval;
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/* Allocate previously reserved local space */
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F_AllocLocalSpace (CurrentFunc);
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/* Skip the '=' */
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NextToken ();
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/* Setup the type flags for the assignment */
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Flags = (Size == 1)? CF_FORCECHAR : CF_NONE;
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/* Special handling for compound types */
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if (IsCompound) {
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/* First reserve space for the variable */
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SymData = F_ReserveLocalSpace (CurrentFunc, Size);
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/* Next, allocate the space on the stack. This means that the
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* variable is now located at offset 0 from the current sp.
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*/
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F_AllocLocalSpace (CurrentFunc);
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/* Switch to read only data */
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g_userodata ();
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/* Define a label for the initialization data */
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InitLabel = GetLocalLabel ();
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g_defdatalabel (InitLabel);
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/* Parse the initialization generating a memory image of the
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* data in the RODATA segment.
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*/
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ParseInit (Decl->Type);
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/* Generate code to copy this data into the variable space */
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g_initauto (InitLabel, Size);
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/* Get the expression into the primary */
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if (evalexpr (Flags, hie1, &lval) == 0) {
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/* Constant expression. Adjust the types */
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assignadjust (Decl->Type, &lval);
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Flags |= CF_CONST;
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} else {
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/* Expression is not constant and in the primary */
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assignadjust (Decl->Type, &lval);
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}
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/* Push the value */
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g_push (Flags | TypeOf (Decl->Type), lval.ConstVal);
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/* Allocate previously reserved local space */
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F_AllocLocalSpace (CurrentFunc);
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/* Setup the type flags for the assignment */
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Flags = (Size == 1)? CF_FORCECHAR : CF_NONE;
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/* Get the expression into the primary */
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if (evalexpr (Flags, hie1, &lval) == 0) {
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/* Constant expression. Adjust the types */
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assignadjust (Decl->Type, &lval);
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Flags |= CF_CONST;
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} else {
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/* Expression is not constant and in the primary */
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assignadjust (Decl->Type, &lval);
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}
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/* Push the value */
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g_push (Flags | TypeOf (Decl->Type), lval.ConstVal);
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}
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/* Mark the variable as referenced */
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*SC |= SC_REF;
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@ -209,23 +243,44 @@ static unsigned ParseAutoDecl (Declaration* Decl, unsigned Size, unsigned* SC)
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/* Skip the '=' */
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NextToken ();
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/* Setup the type flags for the assignment */
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Flags = (Size == 1)? CF_FORCECHAR : CF_NONE;
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if (IsCompound) {
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/* Switch to read only data */
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g_userodata ();
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/* Define a label for the initialization data */
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InitLabel = GetLocalLabel ();
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g_defdatalabel (InitLabel);
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/* Parse the initialization generating a memory image of the
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* data in the RODATA segment.
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*/
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ParseInit (Decl->Type);
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/* Generate code to copy this data into the variable space */
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g_initstatic (InitLabel, SymData, Size);
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/* Get the expression into the primary */
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if (evalexpr (Flags, hie1, &lval) == 0) {
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/* Constant expression. Adjust the types */
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assignadjust (Decl->Type, &lval);
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Flags |= CF_CONST;
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/* Load it into the primary */
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exprhs (Flags, 0, &lval);
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} else {
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/* Expression is not constant and in the primary */
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assignadjust (Decl->Type, &lval);
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}
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/* Store the value into the variable */
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g_putstatic (Flags | TypeOf (Decl->Type), SymData, 0);
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/* Setup the type flags for the assignment */
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Flags = (Size == 1)? CF_FORCECHAR : CF_NONE;
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/* Get the expression into the primary */
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if (evalexpr (Flags, hie1, &lval) == 0) {
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/* Constant expression. Adjust the types */
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assignadjust (Decl->Type, &lval);
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Flags |= CF_CONST;
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/* Load it into the primary */
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exprhs (Flags, 0, &lval);
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} else {
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/* Expression is not constant and in the primary */
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assignadjust (Decl->Type, &lval);
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}
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/* Store the value into the variable */
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g_putstatic (Flags | TypeOf (Decl->Type), SymData, 0);
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}
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/* Mark the variable as referenced */
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*SC |= SC_REF;
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