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Allow initialization of local variables of compound type

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git-svn-id: svn://svn.cc65.org/cc65/trunk@1458 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
cuz
2002-10-10 21:15:24 +00:00
parent dcdaf8fd49
commit 83fb2c8ab4
3 changed files with 168 additions and 48 deletions
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95
src/cc65/codegen.c
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@@ -450,7 +450,7 @@ void g_leave (void)
{
/* How many bytes of locals do we have to drop? */
int k = -oursp;
/* If we didn't have a variable argument list, don't call leave */
if (funcargs >= 0) {
@@ -598,25 +598,25 @@ void g_getimmed (unsigned Flags, unsigned long Val, long Offs)
break;
case CF_LONG:
/* Split the value into 4 bytes */
B1 = (unsigned char) (Val >> 0);
B2 = (unsigned char) (Val >> 8);
B3 = (unsigned char) (Val >> 16);
B4 = (unsigned char) (Val >> 24);
/* Split the value into 4 bytes */
B1 = (unsigned char) (Val >> 0);
B2 = (unsigned char) (Val >> 8);
B3 = (unsigned char) (Val >> 16);
B4 = (unsigned char) (Val >> 24);
/* Remember which bytes are done */
Done = 0;
/* Remember which bytes are done */
Done = 0;
/* Load the value */
AddCodeLine ("ldx #$%02X", B2);
Done |= 0x02;
if (B2 == B3) {
AddCodeLine ("stx sreg");
Done |= 0x04;
}
if (B2 == B4) {
AddCodeLine ("stx sreg+1");
Done |= 0x08;
/* Load the value */
AddCodeLine ("ldx #$%02X", B2);
Done |= 0x02;
if (B2 == B3) {
AddCodeLine ("stx sreg");
Done |= 0x04;
}
if (B2 == B4) {
AddCodeLine ("stx sreg+1");
Done |= 0x08;
}
if ((Done & 0x04) == 0 && B1 != B3) {
AddCodeLine ("lda #$%02X", B3);
@@ -3913,6 +3913,65 @@ void g_zerobytes (unsigned n)
void g_initauto (unsigned Label, unsigned Size)
/* Initialize a local variable at stack offset zero from static data */
{
unsigned CodeLabel = GetLocalLabel ();
CheckLocalOffs (Size);
if (Size <= 128) {
ldyconst (Size-1);
g_defcodelabel (CodeLabel);
AddCodeLine ("lda %s,y", GetLabelName (CF_STATIC, Label, 0));
AddCodeLine ("sta (sp),y");
AddCodeLine ("dey");
AddCodeLine ("bpl %s", LocalLabelName (CodeLabel));
} else if (Size <= 256) {
ldyconst (0);
g_defcodelabel (CodeLabel);
AddCodeLine ("lda %s,y", GetLabelName (CF_STATIC, Label, 0));
AddCodeLine ("sta (sp),y");
AddCodeLine ("iny");
AddCodeLine ("cpy #$%02X", (unsigned char) Size);
AddCodeLine ("bne %s", LocalLabelName (CodeLabel));
}
}
void g_initstatic (unsigned InitLabel, unsigned VarLabel, unsigned Size)
/* Initialize a static local variable from static initialization data */
{
if (Size <= 128) {
unsigned CodeLabel = GetLocalLabel ();
ldyconst (Size-1);
g_defcodelabel (CodeLabel);
AddCodeLine ("lda %s,y", GetLabelName (CF_STATIC, InitLabel, 0));
AddCodeLine ("sta %s,y", GetLabelName (CF_STATIC, VarLabel, 0));
AddCodeLine ("dey");
AddCodeLine ("bpl %s", LocalLabelName (CodeLabel));
} else if (Size <= 256) {
unsigned CodeLabel = GetLocalLabel ();
ldyconst (0);
g_defcodelabel (CodeLabel);
AddCodeLine ("lda %s,y", GetLabelName (CF_STATIC, InitLabel, 0));
AddCodeLine ("sta %s,y", GetLabelName (CF_STATIC, VarLabel, 0));
AddCodeLine ("iny");
AddCodeLine ("cpy #$%02X", (unsigned char) Size);
AddCodeLine ("bne %s", LocalLabelName (CodeLabel));
} else {
/* Use the easy way here: memcpy */
g_getimmed (CF_STATIC, VarLabel, 0);
AddCodeLine ("jsr pushax");
g_getimmed (CF_STATIC, InitLabel, 0);
AddCodeLine ("jsr pushax");
g_getimmed (CF_INT | CF_UNSIGNED | CF_CONST, Size, 0);
AddCodeLine ("jsr %s", GetLabelName (CF_EXTERNAL, (unsigned long) "memcpy", 0));
}
}
/*****************************************************************************/
/* Switch statement */
/*****************************************************************************/