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Added new address size override commands z:, a: and f:.

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git-svn-id: svn://svn.cc65.org/cc65/trunk@2222 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
cuz
2003-06-17 20:22:14 +00:00
parent 7016496564
commit 3cbd6ca29b
3 changed files with 62 additions and 8 deletions
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33
src/ca65/ea.c
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@@ -40,7 +40,7 @@
#include "nexttok.h"
#include "ea.h"
/*****************************************************************************/
/* Code */
@@ -51,12 +51,36 @@
void GetEA (EffAddr* A)
/* Parse an effective address, return the result in A */
{
unsigned long Restrictions;
/* Clear the output struct */
A->AddrModeSet = 0;
A->Bank = 0;
A->Expr = 0;
/* Handle an addressing size override */
switch (Tok) {
case TOK_OVERRIDE_ZP:
Restrictions = AM_DIR | AM_DIR_X | AM_DIR_Y;
NextTok ();
break;
case TOK_OVERRIDE_ABS:
Restrictions = AM_ABS | AM_ABS_X | AM_ABS_Y;
NextTok ();
break;
case TOK_OVERRIDE_FAR:
Restrictions = AM_ABS_LONG | AM_ABS_LONG_X;
NextTok ();
break;
default:
Restrictions = ~0UL; /* None */
break;
}
/* Parse the effective address */
if (TokIsSep (Tok)) {
A->AddrModeSet = AM_IMPLICIT;
@@ -167,7 +191,7 @@ void GetEA (EffAddr* A)
switch (Tok) {
case TOK_X:
A->AddrModeSet = AM_ABS_X | AM_DIR_X;
A->AddrModeSet = AM_ABS_LONG_X | AM_ABS_X | AM_DIR_X;
NextTok ();
break;
@@ -188,11 +212,14 @@ void GetEA (EffAddr* A)
} else {
A->AddrModeSet = AM_ABS | AM_DIR;
A->AddrModeSet = AM_ABS_LONG | AM_ABS | AM_DIR;
}
}
}
/* Apply addressing mode overrides */
A->AddrModeSet &= Restrictions;
}