X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=src%2Fcc65%2Fcoptc02.c;h=bffb5acc8da8a3578e5c93fb35a4d4943b042af4;hb=112ae0e3db511ddd92e769c11328646ebe2a6240;hp=816f92c52e95f6c44f080ff248eb86efbafe57f3;hpb=f38852df82b804f021c9a311a324fc3b0b74dbe7;p=cc65

diff --git a/src/cc65/coptc02.c b/src/cc65/coptc02.c
index 816f92c52..bffb5acc8 100644
--- a/src/cc65/coptc02.c
+++ b/src/cc65/coptc02.c
@@ -6,10 +6,10 @@
 /*                                                                           */
 /*                                                                           */
 /*                                                                           */
-/* (C) 2001-2002 Ullrich von Bassewitz                                       */
-/*               Wacholderweg 14                                             */
-/*               D-70597 Stuttgart                                           */
-/* EMail:        uz@cc65.org                                                 */
+/* (C) 2001-2005, Ullrich von Bassewitz                                      */
+/*                Römerstrasse 52                                            */
+/*                D-70794 Filderstadt                                        */
+/* EMail:         uz@cc65.org                                                */
 /*                                                                           */
 /*                                                                           */
 /* This software is provided 'as-is', without any expressed or implied       */
@@ -131,7 +131,7 @@ unsigned Opt65C02BitOps (CodeSeg* S)
             !CS_RangeHasLabel (S, I+1, 2)                       &&
             CS_GetEntries (S, L+1, I+1, 2)                      &&
             (L[1]->OPC == OP65_AND || L[1]->OPC == OP65_ORA)    &&
-            CE_KnownImm (L[1])                                  &&
+            CE_IsConstImm (L[1])                                &&
             L[2]->OPC == OP65_STA                               &&
             L[2]->AM == L[0]->AM                                &&
             strcmp (L[2]->Arg, L[0]->Arg) == 0                  &&
@@ -201,11 +201,14 @@ unsigned Opt65C02Stores (CodeSeg* S)
       	/* Get next entry */
        	CodeEntry* E = CS_GetEntry (S, I);
 
-	/* Check for the sequence */
-	if (E->OPC == OP65_STA      	       	        &&
+	/* Check for a store with a register value of zero and an addressing
+	 * mode available with STZ.
+	 */
+       	if (((E->OPC == OP65_STA && E->RI->In.RegA == 0) ||
+	     (E->OPC == OP65_STX && E->RI->In.RegX == 0) ||
+	     (E->OPC == OP65_STY && E->RI->In.RegY == 0))     	&&
             (E->AM == AM65_ZP  || E->AM == AM65_ABS ||
-             E->AM == AM65_ZPX || E->AM == AM65_ABSX )  &&
-            E->RI->In.RegA == 0) {
+             E->AM == AM65_ZPX || E->AM == AM65_ABSX)) {
 
             /* Replace by STZ */
             CodeEntry* X = NewCodeEntry (OP65_STZ, E->AM, E->Arg, 0, E->LI);