X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=src%2Fcc65%2Fcodeent.c;h=aed401d88a0214e86c7424d309d39818ba88f7b9;hb=08d6d96264434cce1e437b92093820e46914edf7;hp=08728cabbe428369dd5b43d332177759923dac22;hpb=3c04d5777f95a6df47f9ea617e03aab6153fa9cc;p=cc65

diff --git a/src/cc65/codeent.c b/src/cc65/codeent.c
index 08728cabb..aed401d88 100644
--- a/src/cc65/codeent.c
+++ b/src/cc65/codeent.c
@@ -6,10 +6,10 @@
 /*                                                                           */
 /*                                                                           */
 /*                                                                           */
-/* (C) 2001     Ullrich von Bassewitz                                        */
-/*              Wacholderweg 14                                              */
-/*              D-70597 Stuttgart                                            */
-/* EMail:       uz@musoftware.de                                             */
+/* (C) 2001-2009, Ullrich von Bassewitz                                      */
+/*                Roemerstrasse 52                                           */
+/*                D-70794 Filderstadt                                        */
+/* EMail:         uz@cc65.org                                                */
 /*                                                                           */
 /*                                                                           */
 /* This software is provided 'as-is', without any expressed or implied       */
@@ -34,20 +34,22 @@
 
 
 #include <stdlib.h>
-#include <string.h>
 
 /* common */
 #include "chartype.h"
 #include "check.h"
+#include "debugflag.h"
 #include "xmalloc.h"
+#include "xsprintf.h"
 
 /* cc65 */
+#include "codeent.h"
 #include "codeinfo.h"
 #include "error.h"
 #include "global.h"
 #include "codelab.h"
 #include "opcodes.h"
-#include "codeent.h"
+#include "output.h"
 
 
 
@@ -136,19 +138,73 @@ static int NumArg (const char* Arg, unsigned long* Num)
 static void SetUseChgInfo (CodeEntry* E, const OPCDesc* D)
 /* Set the Use and Chg in E */
 {
+    const ZPInfo* Info;
+
     /* If this is a subroutine call, or a jump to an external function,
      * lookup the information about this function and use it. The jump itself
      * does not change any registers, so we don't need to use the data from D.
      */
-    if (E->OPC == OPC_JSR || ((E->Info & OF_BRA) != 0 && E->JumpTo == 0)) {
+    if ((E->Info & (OF_UBRA | OF_CALL)) != 0 && E->JumpTo == 0) {
      	/* A subroutine call or jump to external symbol (function exit) */
      	GetFuncInfo (E->Arg, &E->Use, &E->Chg);
     } else {
      	/* Some other instruction. Use the values from the opcode description
-	 * plus addressing mode info
+	 * plus addressing mode info.
 	 */
      	E->Use = D->Use | GetAMUseInfo (E->AM);
 	E->Chg = D->Chg;
+
+	/* Check for special zero page registers used */
+	switch (E->AM) {
+
+	    case AM65_ACC:
+		if (E->OPC == OP65_ASL || E->OPC == OP65_DEC ||
+		    E->OPC == OP65_INC || E->OPC == OP65_LSR ||
+		    E->OPC == OP65_ROL || E->OPC == OP65_ROR) {
+		    /* A is changed by these insns */
+		    E->Chg |= REG_A;
+		}
+                break;
+
+	    case AM65_ZP:
+	    case AM65_ABS:
+	    /* Be conservative: */
+	    case AM65_ZPX:
+	    case AM65_ABSX:
+	    case AM65_ABSY:
+	        Info = GetZPInfo (E->Arg);
+	        if (Info && Info->ByteUse != REG_NONE) {
+		    if (E->OPC == OP65_ASL || E->OPC == OP65_DEC ||
+		       	E->OPC == OP65_INC || E->OPC == OP65_LSR ||
+		       	E->OPC == OP65_ROL || E->OPC == OP65_ROR ||
+		       	E->OPC == OP65_TRB || E->OPC == OP65_TSB) {
+		       	/* The zp loc is both, input and output */
+		       	E->Chg |= Info->ByteUse;
+		       	E->Use |= Info->ByteUse;
+		    } else if ((E->Info & OF_STORE) != 0) {
+		       	/* Just output */
+		       	E->Chg |= Info->ByteUse;
+		    } else {
+		       	/* Input only */
+		       	E->Use |= Info->ByteUse;
+		    }
+		}
+	        break;
+
+	    case AM65_ZPX_IND:
+	    case AM65_ZP_INDY:
+	    case AM65_ZP_IND:
+	        Info = GetZPInfo (E->Arg);
+	        if (Info && Info->ByteUse != REG_NONE) {
+		    /* These addressing modes will never change the zp loc */
+		    E->Use |= Info->WordUse;
+		}
+	        break;
+
+	    default:
+	        /* Keep gcc silent */
+	        break;
+	}
     }
 }
 
@@ -160,7 +216,23 @@ static void SetUseChgInfo (CodeEntry* E, const OPCDesc* D)
 
 
 
-CodeEntry* NewCodeEntry (opc_t OPC, am_t AM, const char* Arg, CodeLabel* JumpTo)
+const char* MakeHexArg (unsigned Num)
+/* Convert Num into a string in the form $XY, suitable for passing it as an
+ * argument to NewCodeEntry, and return a pointer to the string.
+ * BEWARE: The function returns a pointer to a static buffer, so the value is
+ * gone if you call it twice (and apart from that it's not thread and signal
+ * safe).
+ */
+{
+    static char Buf[16];
+    xsprintf (Buf, sizeof (Buf), "$%02X", (unsigned char) Num);
+    return Buf;
+}
+
+
+
+CodeEntry* NewCodeEntry (opc_t OPC, am_t AM, const char* Arg,
+	   		 CodeLabel* JumpTo, LineInfo* LI)
 /* Create a new code entry, initialize and return it */
 {
     /* Get the opcode description */
@@ -170,18 +242,15 @@ CodeEntry* NewCodeEntry (opc_t OPC, am_t AM, const char* Arg, CodeLabel* JumpTo)
     CodeEntry* E = xmalloc (sizeof (CodeEntry));
 
     /* Initialize the fields */
-    E->OPC  	= D->OPC;
-    E->AM   	= AM;
-    E->Size 	= GetInsnSize (E->OPC, E->AM);
-    E->Hints	= 0;
-    E->Arg     	= GetArgCopy (Arg);
-    if (NumArg (E->Arg, &E->Num)) {
-    	E-> Flags = CEF_NUMARG;
-    } else {
-       	E->Flags  = 0;
-    }
+    E->OPC    = D->OPC;
+    E->AM     = AM;
+    E->Size   = GetInsnSize (E->OPC, E->AM);
+    E->Arg    = GetArgCopy (Arg);
+    E->Flags  = NumArg (E->Arg, &E->Num)? CEF_NUMARG : 0;   /* Needs E->Arg */
     E->Info   = D->Info;
     E->JumpTo = JumpTo;
+    E->LI     = UseLineInfo (LI);
+    E->RI     = 0;
     SetUseChgInfo (E, D);
     InitCollection (&E->Labels);
 
@@ -205,13 +274,19 @@ void FreeCodeEntry (CodeEntry* E)
     /* Cleanup the collection */
     DoneCollection (&E->Labels);
 
+    /* Release the line info */
+    ReleaseLineInfo (E->LI);
+
+    /* Delete the register info */
+    CE_FreeRegInfo (E);
+
     /* Free the entry */
     xfree (E);
 }
 
 
 
-void ReplaceOPC (CodeEntry* E, opc_t OPC)
+void CE_ReplaceOPC (CodeEntry* E, opc_t OPC)
 /* Replace the opcode of the instruction. This will also replace related info,
  * Size, Use and Chg, but it will NOT update any arguments or labels.
  */
@@ -221,8 +296,8 @@ void ReplaceOPC (CodeEntry* E, opc_t OPC)
 
     /* Replace the opcode */
     E->OPC  = OPC;
-    E->Size = GetInsnSize (E->OPC, E->AM);
     E->Info = D->Info;
+    E->Size = GetInsnSize (E->OPC, E->AM);
     SetUseChgInfo (E, D);
 }
 
@@ -231,17 +306,14 @@ void ReplaceOPC (CodeEntry* E, opc_t OPC)
 int CodeEntriesAreEqual (const CodeEntry* E1, const CodeEntry* E2)
 /* Check if both code entries are equal */
 {
-    return E1->OPC == E2->OPC && E1->AM == E2->AM && strcmp (E1->Arg, E2->Arg) == 0;
+    return (E1->OPC == E2->OPC && E1->AM == E2->AM && strcmp (E1->Arg, E2->Arg) == 0);
 }
 
 
 
-void AttachCodeLabel (CodeEntry* E, CodeLabel* L)
+void CE_AttachLabel (CodeEntry* E, CodeLabel* L)
 /* Attach the label to the entry */
 {
-    /* Mark the label as defined */
-    L->Flags |= LF_DEF;
-
     /* Add it to the entries label list */
     CollAppend (&E->Labels, L);
 
@@ -251,7 +323,23 @@ void AttachCodeLabel (CodeEntry* E, CodeLabel* L)
 
 
 
-void MoveCodeLabel (CodeLabel* L, CodeEntry* E)
+void CE_ClearJumpTo (CodeEntry* E)
+/* Clear the JumpTo entry and the argument (which contained the name of the
+ * label). Note: The function will not clear the backpointer from the label,
+ * so use it with care.
+ */
+{
+    /* Clear the JumpTo entry */
+    E->JumpTo = 0;
+
+    /* Clear the argument and assign the empty one */
+    FreeArg (E->Arg);
+    E->Arg = EmptyArg;
+}
+
+
+
+void CE_MoveLabel (CodeLabel* L, CodeEntry* E)
 /* Move the code label L from it's former owner to the code entry E. */
 {
     /* Delete the label from the owner */
@@ -264,8 +352,8 @@ void MoveCodeLabel (CodeLabel* L, CodeEntry* E)
 
 
 
-void CodeEntrySetArg (CodeEntry* E, const char* Arg)
-/* Set a new argument for the given code entry. An old string is deleted. */
+void CE_SetArg (CodeEntry* E, const char* Arg)
+/* Replace the argument by the new one. */
 {
     /* Free the old argument */
     FreeArg (E->Arg);
@@ -276,8 +364,1006 @@ void CodeEntrySetArg (CodeEntry* E, const char* Arg)
 
 
 
-void OutputCodeEntry (const CodeEntry* E, FILE* F)
-/* Output the code entry to a file */
+void CE_SetNumArg (CodeEntry* E, long Num)
+/* Set a new numeric argument for the given code entry that must already
+ * have a numeric argument.
+ */
+{
+    char Buf[16];
+
+    /* Check that the entry has a numerical argument */
+    CHECK (E->Flags & CEF_NUMARG);
+
+    /* Make the new argument string */
+    if (E->Size == 2) {
+	Num &= 0xFF;
+    	xsprintf (Buf, sizeof (Buf), "$%02X", (unsigned) Num);
+    } else if (E->Size == 3) {
+	Num &= 0xFFFF;
+    	xsprintf (Buf, sizeof (Buf), "$%04X", (unsigned) Num);
+    } else {
+    	Internal ("Invalid instruction size in CE_SetNumArg");
+    }
+
+    /* Replace the argument by the new one */
+    CE_SetArg (E, Buf);
+
+    /* Use the new numerical value */
+    E->Num = Num;
+}
+
+
+
+int CE_IsConstImm (const CodeEntry* E)
+/* Return true if the argument of E is a constant immediate value */
+{
+    return (E->AM == AM65_IMM && (E->Flags & CEF_NUMARG) != 0);
+}
+
+
+
+int CE_IsKnownImm (const CodeEntry* E, unsigned long Num)
+/* Return true if the argument of E is a constant immediate value that is
+ * equal to Num.
+ */
+{
+    return E->AM == AM65_IMM            &&
+           (E->Flags & CEF_NUMARG) != 0 &&
+           E->Num == Num;
+}
+
+
+
+int CE_UseLoadFlags (const CodeEntry* E)
+/* Return true if the instruction uses any flags that are set by a load of
+ * a register (N and Z).
+ */
+{
+    /* Follow unconditional branches, but beware of endless loops. After this,
+     * E will point to the first entry that is not a branch.
+     */
+    if (E->Info & OF_UBRA) {
+        Collection C = AUTO_COLLECTION_INITIALIZER;
+
+        /* Follow the chain */
+        while (E->Info & OF_UBRA) {
+
+            /* Remember the entry so we can detect loops */
+            CollAppend (&C, (void*) E);
+
+            /* Check the target */
+            if (E->JumpTo == 0 || CollIndex (&C, E->JumpTo->Owner) >= 0) {
+                /* Unconditional jump to external symbol, or endless loop. */
+                DoneCollection (&C);
+                return 0;       /* Flags not used */
+            }
+
+            /* Follow the chain */
+            E = E->JumpTo->Owner;
+        }
+
+        /* Delete the collection */
+        DoneCollection (&C);
+    }
+
+    /* A branch will use the flags */
+    if (E->Info & OF_FBRA) {
+        return 1;
+    }
+
+    /* Call of a boolean transformer routine will also use the flags */
+    if (E->OPC == OP65_JSR) {
+        /* Get the condition that is evaluated and check it */
+        switch (FindBoolCmpCond (E->Arg)) {
+            case CMP_EQ:
+            case CMP_NE:
+            case CMP_GT:
+            case CMP_GE:
+            case CMP_LT:
+            case CMP_LE:
+            case CMP_UGT:
+            case CMP_ULE:
+                /* Will use the N or Z flags */
+                return 1;
+
+
+            case CMP_UGE:       /* Uses only carry */
+            case CMP_ULT:       /* Dito */
+            default:            /* No bool transformer subroutine */
+                return 0;
+        }
+    }
+
+    /* Anything else */
+    return 0;
+}
+
+
+
+void CE_FreeRegInfo (CodeEntry* E)
+/* Free an existing register info struct */
+{
+    if (E->RI) {
+       	FreeRegInfo (E->RI);
+	E->RI = 0;
+    }
+}
+
+
+
+void CE_GenRegInfo (CodeEntry* E, RegContents* InputRegs)
+/* Generate register info for this instruction. If an old info exists, it is
+ * overwritten.
+ */
+{
+    /* Pointers to the register contents */
+    RegContents* In;
+    RegContents* Out;
+
+    /* Function register usage */
+    unsigned short Use, Chg;
+
+    /* If we don't have a register info struct, allocate one. */
+    if (E->RI == 0) {
+	E->RI = NewRegInfo (InputRegs);
+    } else {
+	if (InputRegs) {
+	    E->RI->In  = *InputRegs;
+	} else {
+	    RC_Invalidate (&E->RI->In);
+	}
+       	E->RI->Out2 = E->RI->Out = E->RI->In;
+    }
+
+    /* Get pointers to the register contents */
+    In  = &E->RI->In;
+    Out	= &E->RI->Out;
+
+    /* Handle the different instructions */
+    switch (E->OPC) {
+
+	case OP65_ADC:
+	    /* We don't know the value of the carry, so the result is
+	     * always unknown.
+	     */
+	    Out->RegA = UNKNOWN_REGVAL;
+	    break;
+
+	case OP65_AND:
+       	    if (RegValIsKnown (In->RegA)) {
+		if (CE_IsConstImm (E)) {
+		    Out->RegA = In->RegA & (short) E->Num;
+		} else if (E->AM == AM65_ZP) {
+		    switch (GetKnownReg (E->Use & REG_ZP, In)) {
+		    	case REG_TMP1:
+		    	    Out->RegA = In->RegA & In->Tmp1;
+		    	    break;
+			case REG_PTR1_LO:
+			    Out->RegA = In->RegA & In->Ptr1Lo;
+			    break;
+			case REG_PTR1_HI:
+			    Out->RegA = In->RegA & In->Ptr1Hi;
+			    break;
+			case REG_SREG_LO:
+			    Out->RegA = In->RegA & In->SRegLo;
+			    break;
+			case REG_SREG_HI:
+			    Out->RegA = In->RegA & In->SRegHi;
+			    break;
+		    	default:
+		    	    Out->RegA = UNKNOWN_REGVAL;
+		     	    break;
+		    }
+		} else {
+		    Out->RegA = UNKNOWN_REGVAL;
+		}
+	    }
+	    break;
+
+	case OP65_ASL:
+	    if (E->AM == AM65_ACC && RegValIsKnown (In->RegA)) {
+		Out->RegA = (In->RegA << 1) & 0xFF;
+	    } else if (E->AM == AM65_ZP) {
+		switch (GetKnownReg (E->Chg & REG_ZP, In)) {
+		    case REG_TMP1:
+			Out->Tmp1 = (In->Tmp1 << 1) & 0xFF;
+			break;
+		    case REG_PTR1_LO:
+			Out->Ptr1Lo = (In->Ptr1Lo << 1) & 0xFF;
+			break;
+		    case REG_PTR1_HI:
+			Out->Ptr1Hi = (In->Ptr1Hi << 1) & 0xFF;
+			break;
+		    case REG_SREG_LO:
+			Out->SRegLo = (In->SRegLo << 1) & 0xFF;
+			break;
+		    case REG_SREG_HI:
+			Out->SRegHi = (In->SRegHi << 1) & 0xFF;
+			break;
+		}
+	    } else if (E->AM == AM65_ZPX) {
+                /* Invalidates all ZP registers */
+                RC_InvalidateZP (Out);
+	    }
+	    break;
+
+	case OP65_BCC:
+	    break;
+
+	case OP65_BCS:
+	    break;
+
+	case OP65_BEQ:
+	    break;
+
+	case OP65_BIT:
+	    break;
+
+	case OP65_BMI:
+	    break;
+
+	case OP65_BNE:
+	    break;
+
+	case OP65_BPL:
+	    break;
+
+	case OP65_BRA:
+	    break;
+
+	case OP65_BRK:
+	    break;
+
+	case OP65_BVC:
+	    break;
+
+	case OP65_BVS:
+	    break;
+
+	case OP65_CLC:
+	    break;
+
+	case OP65_CLD:
+	    break;
+
+	case OP65_CLI:
+	    break;
+
+	case OP65_CLV:
+	    break;
+
+	case OP65_CMP:
+	    break;
+
+	case OP65_CPX:
+	    break;
+
+	case OP65_CPY:
+	    break;
+
+	case OP65_DEA:
+       	    if (RegValIsKnown (In->RegA)) {
+	    	Out->RegA = (In->RegA - 1) & 0xFF;
+	    }
+	    break;
+
+	case OP65_DEC:
+	    if (E->AM == AM65_ACC && RegValIsKnown (In->RegA)) {
+	    	Out->RegA = (In->RegA - 1) & 0xFF;
+	    } else if (E->AM == AM65_ZP) {
+		switch (GetKnownReg (E->Chg & REG_ZP, In)) {
+		    case REG_TMP1:
+			Out->Tmp1 = (In->Tmp1 - 1) & 0xFF;
+			break;
+		    case REG_PTR1_LO:
+			Out->Ptr1Lo = (In->Ptr1Lo - 1) & 0xFF;
+			break;
+		    case REG_PTR1_HI:
+			Out->Ptr1Hi = (In->Ptr1Hi - 1) & 0xFF;
+			break;
+		    case REG_SREG_LO:
+			Out->SRegLo = (In->SRegLo - 1) & 0xFF;
+			break;
+		    case REG_SREG_HI:
+			Out->SRegHi = (In->SRegHi - 1) & 0xFF;
+			break;
+		}
+	    } else if (E->AM == AM65_ZPX) {
+                /* Invalidates all ZP registers */
+                RC_InvalidateZP (Out);
+	    }
+	    break;
+
+	case OP65_DEX:
+       	    if (RegValIsKnown (In->RegX)) {
+	    	Out->RegX = (In->RegX - 1) & 0xFF;
+	    }
+	    break;
+
+	case OP65_DEY:
+       	    if (RegValIsKnown (In->RegY)) {
+	    	Out->RegY = (In->RegY - 1) & 0xFF;
+	    }
+	    break;
+
+	case OP65_EOR:
+       	    if (RegValIsKnown (In->RegA)) {
+		if (CE_IsConstImm (E)) {
+		    Out->RegA = In->RegA ^ (short) E->Num;
+		} else if (E->AM == AM65_ZP) {
+		    switch (GetKnownReg (E->Use & REG_ZP, In)) {
+		    	case REG_TMP1:
+		    	    Out->RegA = In->RegA ^ In->Tmp1;
+		    	    break;
+			case REG_PTR1_LO:
+			    Out->RegA = In->RegA ^ In->Ptr1Lo;
+			    break;
+			case REG_PTR1_HI:
+			    Out->RegA = In->RegA ^ In->Ptr1Hi;
+			    break;
+			case REG_SREG_LO:
+			    Out->RegA = In->RegA ^ In->SRegLo;
+			    break;
+			case REG_SREG_HI:
+			    Out->RegA = In->RegA ^ In->SRegHi;
+			    break;
+		    	default:
+		    	    Out->RegA = UNKNOWN_REGVAL;
+		    	    break;
+		    }
+		} else {
+		    Out->RegA = UNKNOWN_REGVAL;
+		}
+	    }
+	    break;
+
+	case OP65_INA:
+	    if (RegValIsKnown (In->RegA)) {
+		Out->RegA = (In->RegA + 1) & 0xFF;
+	    }
+	    break;
+
+	case OP65_INC:
+	    if (E->AM == AM65_ACC && RegValIsKnown (In->RegA)) {
+	     	Out->RegA = (In->RegA + 1) & 0xFF;
+	    } else if (E->AM == AM65_ZP) {
+	     	switch (GetKnownReg (E->Chg & REG_ZP, In)) {
+		    case REG_TMP1:
+			Out->Tmp1 = (In->Tmp1 + 1) & 0xFF;
+			break;
+		    case REG_PTR1_LO:
+			Out->Ptr1Lo = (In->Ptr1Lo + 1) & 0xFF;
+			break;
+		    case REG_PTR1_HI:
+		    	Out->Ptr1Hi = (In->Ptr1Hi + 1) & 0xFF;
+			break;
+		    case REG_SREG_LO:
+			Out->SRegLo = (In->SRegLo + 1) & 0xFF;
+			break;
+		    case REG_SREG_HI:
+			Out->SRegHi = (In->SRegHi + 1) & 0xFF;
+			break;
+		}
+	    } else if (E->AM == AM65_ZPX) {
+                /* Invalidates all ZP registers */
+                RC_InvalidateZP (Out);
+	    }
+	    break;
+
+	case OP65_INX:
+	    if (RegValIsKnown (In->RegX)) {
+		Out->RegX = (In->RegX + 1) & 0xFF;
+	    }
+	    break;
+
+	case OP65_INY:
+	    if (RegValIsKnown (In->RegY)) {
+		Out->RegY = (In->RegY + 1) & 0xFF;
+	    }
+	    break;
+
+	case OP65_JCC:
+	    break;
+
+	case OP65_JCS:
+	    break;
+
+	case OP65_JEQ:
+	    break;
+
+	case OP65_JMI:
+	    break;
+
+	case OP65_JMP:
+	    break;
+
+	case OP65_JNE:
+	    break;
+
+	case OP65_JPL:
+	    break;
+
+	case OP65_JSR:
+	    /* Get the code info for the function */
+	    GetFuncInfo (E->Arg, &Use, &Chg);
+	    if (Chg & REG_A) {
+		Out->RegA = UNKNOWN_REGVAL;
+	    }
+	    if (Chg & REG_X) {
+		Out->RegX = UNKNOWN_REGVAL;
+	    }
+	    if (Chg & REG_Y) {
+		Out->RegY = UNKNOWN_REGVAL;
+	    }
+	    if (Chg & REG_TMP1) {
+		Out->Tmp1 = UNKNOWN_REGVAL;
+	    }
+            if (Chg & REG_PTR1_LO) {
+	     	Out->Ptr1Lo = UNKNOWN_REGVAL;
+	    }
+	    if (Chg & REG_PTR1_HI) {
+	     	Out->Ptr1Hi = UNKNOWN_REGVAL;
+	    }
+            if (Chg & REG_SREG_LO) {
+	     	Out->SRegLo = UNKNOWN_REGVAL;
+	    }
+	    if (Chg & REG_SREG_HI) {
+	     	Out->SRegHi = UNKNOWN_REGVAL;
+	    }
+       	    /* ## FIXME: Quick hack for some known functions: */
+	    if (strcmp (E->Arg, "tosandax") == 0) {
+		if (In->RegA == 0) {
+		    Out->RegA = 0;
+		}
+		if (In->RegX == 0) {
+		    Out->RegX = 0;
+		}
+	    } else if (strcmp (E->Arg, "tosorax") == 0) {
+		if (In->RegA == 0xFF) {
+		    Out->RegA = 0xFF;
+		}
+		if (In->RegX == 0xFF) {
+                    Out->RegX = 0xFF;
+                }
+            } else if (FindBoolCmpCond (E->Arg) != CMP_INV) {
+                Out->RegX = 0;
+            }
+	    break;
+
+	case OP65_JVC:
+	    break;
+
+	case OP65_JVS:
+	    break;
+
+	case OP65_LDA:
+	    if (CE_IsConstImm (E)) {
+	     	Out->RegA = (unsigned char) E->Num;
+	    } else if (E->AM == AM65_ZP) {
+		switch (GetKnownReg (E->Use & REG_ZP, In)) {
+		    case REG_TMP1:
+			Out->RegA = In->Tmp1;
+			break;
+		    case REG_PTR1_LO:
+			Out->RegA = In->Ptr1Lo;
+			break;
+		    case REG_PTR1_HI:
+			Out->RegA = In->Ptr1Hi;
+			break;
+		    case REG_SREG_LO:
+			Out->RegA = In->SRegLo;
+			break;
+		    case REG_SREG_HI:
+			Out->RegA = In->SRegHi;
+			break;
+		    default:
+			Out->RegA = UNKNOWN_REGVAL;
+			break;
+		}
+	    } else {
+	     	/* A is now unknown */
+	     	Out->RegA = UNKNOWN_REGVAL;
+	    }
+	    break;
+
+	case OP65_LDX:
+	    if (CE_IsConstImm (E)) {
+	     	Out->RegX = (unsigned char) E->Num;
+	    } else if (E->AM == AM65_ZP) {
+		switch (GetKnownReg (E->Use & REG_ZP, In)) {
+		    case REG_TMP1:
+			Out->RegX = In->Tmp1;
+			break;
+		    case REG_PTR1_LO:
+			Out->RegX = In->Ptr1Lo;
+			break;
+		    case REG_PTR1_HI:
+			Out->RegX = In->Ptr1Hi;
+			break;
+		    case REG_SREG_LO:
+			Out->RegX = In->SRegLo;
+			break;
+		    case REG_SREG_HI:
+			Out->RegX = In->SRegHi;
+			break;
+		    default:
+			Out->RegX = UNKNOWN_REGVAL;
+			break;
+		}
+	    } else {
+	     	/* X is now unknown */
+	     	Out->RegX = UNKNOWN_REGVAL;
+	    }
+	    break;
+
+	case OP65_LDY:
+	    if (CE_IsConstImm (E)) {
+	     	Out->RegY = (unsigned char) E->Num;
+	    } else if (E->AM == AM65_ZP) {
+		switch (GetKnownReg (E->Use & REG_ZP, In)) {
+		    case REG_TMP1:
+			Out->RegY = In->Tmp1;
+			break;
+		    case REG_PTR1_LO:
+			Out->RegY = In->Ptr1Lo;
+			break;
+		    case REG_PTR1_HI:
+			Out->RegY = In->Ptr1Hi;
+			break;
+		    case REG_SREG_LO:
+			Out->RegY = In->SRegLo;
+			break;
+		    case REG_SREG_HI:
+			Out->RegY = In->SRegHi;
+			break;
+		    default:
+			Out->RegY = UNKNOWN_REGVAL;
+			break;
+		}
+	    } else {
+		/* Y is now unknown */
+		Out->RegY = UNKNOWN_REGVAL;
+	    }
+	    break;
+
+	case OP65_LSR:
+	    if (E->AM == AM65_ACC && RegValIsKnown (In->RegA)) {
+		Out->RegA = (In->RegA >> 1) & 0xFF;
+	    } else if (E->AM == AM65_ZP) {
+		switch (GetKnownReg (E->Chg & REG_ZP, In)) {
+		    case REG_TMP1:
+			Out->Tmp1 = (In->Tmp1 >> 1) & 0xFF;
+			break;
+		    case REG_PTR1_LO:
+			Out->Ptr1Lo = (In->Ptr1Lo >> 1) & 0xFF;
+			break;
+		    case REG_PTR1_HI:
+		     	Out->Ptr1Hi = (In->Ptr1Hi >> 1) & 0xFF;
+			break;
+		    case REG_SREG_LO:
+			Out->SRegLo = (In->SRegLo >> 1) & 0xFF;
+			break;
+		    case REG_SREG_HI:
+			Out->SRegHi = (In->SRegHi >> 1) & 0xFF;
+			break;
+		}
+	    } else if (E->AM == AM65_ZPX) {
+                /* Invalidates all ZP registers */
+                RC_InvalidateZP (Out);
+	    }
+	    break;
+
+	case OP65_NOP:
+	    break;
+
+	case OP65_ORA:
+	    if (RegValIsKnown (In->RegA)) {
+	 	if (CE_IsConstImm (E)) {
+	 	    Out->RegA = In->RegA | (short) E->Num;
+	       	} else if (E->AM == AM65_ZP) {
+	 	    switch (GetKnownReg (E->Use & REG_ZP, In)) {
+	 	    	case REG_TMP1:
+	 	    	    Out->RegA = In->RegA | In->Tmp1;
+	 	    	    break;
+	 		case REG_PTR1_LO:
+	 		    Out->RegA = In->RegA | In->Ptr1Lo;
+	 		    break;
+	 		case REG_PTR1_HI:
+	 		    Out->RegA = In->RegA | In->Ptr1Hi;
+	 		    break;
+	 		case REG_SREG_LO:
+	 		    Out->RegA = In->RegA | In->SRegLo;
+	 		    break;
+	 		case REG_SREG_HI:
+	 		    Out->RegA = In->RegA | In->SRegHi;
+	 		    break;
+	 	    	default:
+	 	    	    Out->RegA = UNKNOWN_REGVAL;
+	 	    	    break;
+	 	    }
+	 	} else {
+	 	    /* A is now unknown */
+	 	    Out->RegA = UNKNOWN_REGVAL;
+	 	}
+	    }
+	    break;
+
+	case OP65_PHA:
+	    break;
+
+	case OP65_PHP:
+	    break;
+
+	case OP65_PHX:
+	    break;
+
+	case OP65_PHY:
+	    break;
+
+	case OP65_PLA:
+	    Out->RegA = UNKNOWN_REGVAL;
+	    break;
+
+	case OP65_PLP:
+	    break;
+
+    	case OP65_PLX:
+    	    Out->RegX = UNKNOWN_REGVAL;
+    	    break;
+
+    	case OP65_PLY:
+    	    Out->RegY = UNKNOWN_REGVAL;
+    	    break;
+
+    	case OP65_ROL:
+	    /* We don't know the value of the carry bit */
+    	    if (E->AM == AM65_ACC) {
+    		Out->RegA = UNKNOWN_REGVAL;
+    	    } else if (E->AM == AM65_ZP) {
+	     	switch (GetKnownReg (E->Chg & REG_ZP, In)) {
+		    case REG_TMP1:
+		     	Out->Tmp1 = UNKNOWN_REGVAL;
+			break;
+		    case REG_PTR1_LO:
+			Out->Ptr1Lo = UNKNOWN_REGVAL;
+			break;
+		    case REG_PTR1_HI:
+			Out->Ptr1Hi = UNKNOWN_REGVAL;
+			break;
+		    case REG_SREG_LO:
+			Out->SRegLo = UNKNOWN_REGVAL;
+			break;
+		    case REG_SREG_HI:
+			Out->SRegHi = UNKNOWN_REGVAL;
+			break;
+		}
+	    } else if (E->AM == AM65_ZPX) {
+                /* Invalidates all ZP registers */
+                RC_InvalidateZP (Out);
+    	    }
+    	    break;
+
+    	case OP65_ROR:
+	    /* We don't know the value of the carry bit */
+    	    if (E->AM == AM65_ACC) {
+    		Out->RegA = UNKNOWN_REGVAL;
+    	    } else if (E->AM == AM65_ZP) {
+	     	switch (GetKnownReg (E->Chg & REG_ZP, In)) {
+		    case REG_TMP1:
+			Out->Tmp1 = UNKNOWN_REGVAL;
+			break;
+		    case REG_PTR1_LO:
+			Out->Ptr1Lo = UNKNOWN_REGVAL;
+			break;
+		    case REG_PTR1_HI:
+			Out->Ptr1Hi = UNKNOWN_REGVAL;
+			break;
+		    case REG_SREG_LO:
+			Out->SRegLo = UNKNOWN_REGVAL;
+			break;
+		    case REG_SREG_HI:
+			Out->SRegHi = UNKNOWN_REGVAL;
+			break;
+		}
+	    } else if (E->AM == AM65_ZPX) {
+                /* Invalidates all ZP registers */
+                RC_InvalidateZP (Out);
+    	    }
+    	    break;
+
+    	case OP65_RTI:
+    	    break;
+
+    	case OP65_RTS:
+    	    break;
+
+    	case OP65_SBC:
+    	    /* We don't know the value of the carry bit */
+    	    Out->RegA = UNKNOWN_REGVAL;
+    	    break;
+
+    	case OP65_SEC:
+    	    break;
+
+    	case OP65_SED:
+    	    break;
+
+    	case OP65_SEI:
+    	    break;
+
+    	case OP65_STA:
+	    if (E->AM == AM65_ZP) {
+		switch (GetKnownReg (E->Chg & REG_ZP, 0)) {
+		    case REG_TMP1:
+			Out->Tmp1 = In->RegA;
+			break;
+		    case REG_PTR1_LO:
+			Out->Ptr1Lo = In->RegA;
+			break;
+		    case REG_PTR1_HI:
+			Out->Ptr1Hi = In->RegA;
+			break;
+		    case REG_SREG_LO:
+			Out->SRegLo = In->RegA;
+			break;
+		    case REG_SREG_HI:
+			Out->SRegHi = In->RegA;
+		     	break;
+		}
+	    } else if (E->AM == AM65_ZPX) {
+                /* Invalidates all ZP registers */
+                RC_InvalidateZP (Out);
+	    }
+	    break;
+
+	case OP65_STX:
+	    if (E->AM == AM65_ZP) {
+		switch (GetKnownReg (E->Chg & REG_ZP, 0)) {
+		    case REG_TMP1:
+			Out->Tmp1 = In->RegX;
+			break;
+		    case REG_PTR1_LO:
+			Out->Ptr1Lo = In->RegX;
+			break;
+		    case REG_PTR1_HI:
+			Out->Ptr1Hi = In->RegX;
+	 		break;
+		    case REG_SREG_LO:
+			Out->SRegLo = In->RegX;
+			break;
+		    case REG_SREG_HI:
+			Out->SRegHi = In->RegX;
+			break;
+		}
+	    } else if (E->AM == AM65_ZPX) {
+                /* Invalidates all ZP registers */
+                RC_InvalidateZP (Out);
+	    }
+	    break;
+
+	case OP65_STY:
+	    if (E->AM == AM65_ZP) {
+		switch (GetKnownReg (E->Chg & REG_ZP, 0)) {
+		    case REG_TMP1:
+			Out->Tmp1 = In->RegY;
+			break;
+		    case REG_PTR1_LO:
+			Out->Ptr1Lo = In->RegY;
+			break;
+		    case REG_PTR1_HI:
+			Out->Ptr1Hi = In->RegY;
+			break;
+		    case REG_SREG_LO:
+			Out->SRegLo = In->RegY;
+			break;
+		    case REG_SREG_HI:
+			Out->SRegHi = In->RegY;
+			break;
+		}
+	    } else if (E->AM == AM65_ZPX) {
+                /* Invalidates all ZP registers */
+                RC_InvalidateZP (Out);
+            }
+	    break;
+
+	case OP65_STZ:
+	    if (E->AM == AM65_ZP) {
+		switch (GetKnownReg (E->Chg & REG_ZP, 0)) {
+		    case REG_TMP1:
+	 		Out->Tmp1 = 0;
+			break;
+		    case REG_PTR1_LO:
+			Out->Ptr1Lo = 0;
+			break;
+		    case REG_PTR1_HI:
+			Out->Ptr1Hi = 0;
+			break;
+		    case REG_SREG_LO:
+			Out->SRegLo = 0;
+			break;
+		    case REG_SREG_HI:
+		    	Out->SRegHi = 0;
+			break;
+		}
+	    } else if (E->AM == AM65_ZPX) {
+                /* Invalidates all ZP registers */
+                RC_InvalidateZP (Out);
+            }
+	    break;
+
+	case OP65_TAX:
+	    Out->RegX = In->RegA;
+	    break;
+
+	case OP65_TAY:
+	    Out->RegY = In->RegA;
+	    break;
+
+	case OP65_TRB:
+	    if (E->AM == AM65_ZPX) {
+	     	/* Invalidates all ZP registers */
+	    	RC_InvalidateZP (Out);
+	    } else if (E->AM == AM65_ZP) {
+	    	if (RegValIsKnown (In->RegA)) {
+		    switch (GetKnownReg (E->Chg & REG_ZP, In)) {
+			case REG_TMP1:
+			    Out->Tmp1 &= ~In->RegA;
+			    break;
+			case REG_PTR1_LO:
+			    Out->Ptr1Lo &= ~In->RegA;
+			    break;
+			case REG_PTR1_HI:
+	 		    Out->Ptr1Hi &= ~In->RegA;
+			    break;
+			case REG_SREG_LO:
+			    Out->SRegLo &= ~In->RegA;
+			    break;
+			case REG_SREG_HI:
+			    Out->SRegHi &= ~In->RegA;
+			    break;
+		    }
+	    	} else {
+		    switch (GetKnownReg (E->Chg & REG_ZP, In)) {
+			case REG_TMP1:
+			    Out->Tmp1 = UNKNOWN_REGVAL;
+			    break;
+			case REG_PTR1_LO:
+			    Out->Ptr1Lo = UNKNOWN_REGVAL;
+			    break;
+			case REG_PTR1_HI:
+			    Out->Ptr1Hi = UNKNOWN_REGVAL;
+			    break;
+			case REG_SREG_LO:
+			    Out->SRegLo = UNKNOWN_REGVAL;
+			    break;
+		     	case REG_SREG_HI:
+			    Out->SRegHi = UNKNOWN_REGVAL;
+			    break;
+		    }
+	    	}
+	    }
+	    break;
+
+	case OP65_TSB:
+	    if (E->AM == AM65_ZPX) {
+	     	/* Invalidates all ZP registers */
+	    	RC_InvalidateZP (Out);
+	    } else if (E->AM == AM65_ZP) {
+	    	if (RegValIsKnown (In->RegA)) {
+		    switch (GetKnownReg (E->Chg & REG_ZP, In)) {
+			case REG_TMP1:
+			    Out->Tmp1 |= In->RegA;
+			    break;
+			case REG_PTR1_LO:
+			    Out->Ptr1Lo |= In->RegA;
+	 		    break;
+			case REG_PTR1_HI:
+			    Out->Ptr1Hi |= In->RegA;
+			    break;
+			case REG_SREG_LO:
+			    Out->SRegLo |= In->RegA;
+			    break;
+			case REG_SREG_HI:
+			    Out->SRegHi |= In->RegA;
+			    break;
+		    }
+	    	} else {
+		    switch (GetKnownReg (E->Chg & REG_ZP, In)) {
+			case REG_TMP1:
+			    Out->Tmp1 = UNKNOWN_REGVAL;
+			    break;
+			case REG_PTR1_LO:
+			    Out->Ptr1Lo = UNKNOWN_REGVAL;
+			    break;
+			case REG_PTR1_HI:
+			    Out->Ptr1Hi = UNKNOWN_REGVAL;
+			    break;
+			case REG_SREG_LO:
+		     	    Out->SRegLo = UNKNOWN_REGVAL;
+			    break;
+			case REG_SREG_HI:
+			    Out->SRegHi = UNKNOWN_REGVAL;
+			    break;
+		    }
+	    	}
+	    }
+	    break;
+
+	case OP65_TSX:
+	    Out->RegX = UNKNOWN_REGVAL;
+	    break;
+
+	case OP65_TXA:
+	    Out->RegA = In->RegX;
+	    break;
+
+	case OP65_TXS:
+	    break;
+
+	case OP65_TYA:
+	    Out->RegA = In->RegY;
+	    break;
+
+	default:
+	    break;
+
+    }
+}
+
+
+
+static char* RegInfoDesc (unsigned U, char* Buf)
+/* Return a string containing register info */
+{
+    Buf[0] = '\0';
+
+    strcat (Buf, U & REG_SREG_HI? "H" : "_");
+    strcat (Buf, U & REG_SREG_LO? "L" : "_");
+    strcat (Buf, U & REG_A?       "A" : "_");
+    strcat (Buf, U & REG_X?       "X" : "_");
+    strcat (Buf, U & REG_Y?       "Y" : "_");
+    strcat (Buf, U & REG_TMP1?    "T1" : "__");
+    strcat (Buf, U & REG_PTR1?    "1" : "_");
+    strcat (Buf, U & REG_PTR2?    "2" : "_");
+    strcat (Buf, U & REG_SAVE?    "V"  : "_");
+    strcat (Buf, U & REG_SP?      "S" : "_");
+
+    return Buf;
+}
+
+
+
+static char* RegContentDesc (const RegContents* RC, char* Buf)
+/* Return a string containing register contents */
+{
+    char* B = Buf;
+
+    if (RegValIsUnknown (RC->RegA)) {
+        strcpy (B, "A:XX ");
+    } else {
+        sprintf (B, "A:%02X ", RC->RegA);
+    }
+    B += 5;
+    if (RegValIsUnknown (RC->RegX)) {
+        strcpy (B, "X:XX ");
+    } else {
+        sprintf (B, "X:%02X ", RC->RegX);
+    }
+    B += 5;
+    if (RegValIsUnknown (RC->RegY)) {
+        strcpy (B, "Y:XX");
+    } else {
+        sprintf (B, "Y:%02X", RC->RegY);
+    }
+    B += 4;
+
+    return Buf;
+}
+
+
+
+void CE_Output (const CodeEntry* E)
+/* Output the code entry to the output file */
 {
     const OPCDesc* D;
     unsigned Chars;
@@ -287,68 +1373,68 @@ void OutputCodeEntry (const CodeEntry* E, FILE* F)
     unsigned LabelCount = CollCount (&E->Labels);
     unsigned I;
     for (I = 0; I < LabelCount; ++I) {
-    	OutputCodeLabel (CollConstAt (&E->Labels, I), F);
+    	CL_Output (CollConstAt (&E->Labels, I));
     }
 
     /* Get the opcode description */
     D = GetOPCDesc (E->OPC);
 
     /* Print the mnemonic */
-    Chars = fprintf (F, "\t%s", D->Mnemo);
+    Chars = WriteOutput ("\t%s", D->Mnemo);
 
     /* Print the operand */
     switch (E->AM) {
 
-    	case AM_IMP:
+    	case AM65_IMP:
     	    /* implicit */
     	    break;
 
-    	case AM_ACC:
+    	case AM65_ACC:
     	    /* accumulator */
-    	    Chars += fprintf (F, "%*sa", 9-Chars, "");
+    	    Chars += WriteOutput ("%*sa", 9-Chars, "");
     	    break;
 
-    	case AM_IMM:
+	case AM65_IMM:
     	    /* immidiate */
-    	    Chars += fprintf (F, "%*s#%s", 9-Chars, "", E->Arg);
+    	    Chars += WriteOutput ("%*s#%s", 9-Chars, "", E->Arg);
     	    break;
 
-    	case AM_ZP:
-    	case AM_ABS:
+    	case AM65_ZP:
+    	case AM65_ABS:
 	    /* zeropage and absolute */
-	    Chars += fprintf (F, "%*s%s", 9-Chars, "", E->Arg);
-	    break;
+	    Chars += WriteOutput ("%*s%s", 9-Chars, "", E->Arg);
+       	    break;
 
-	case AM_ZPX:
-	case AM_ABSX:
+	case AM65_ZPX:
+	case AM65_ABSX:
 	    /* zeropage,X and absolute,X */
-	    Chars += fprintf (F, "%*s%s,x", 9-Chars, "", E->Arg);
+	    Chars += WriteOutput ("%*s%s,x", 9-Chars, "", E->Arg);
 	    break;
 
-	case AM_ABSY:
+	case AM65_ABSY:
 	    /* absolute,Y */
-	    Chars += fprintf (F, "%*s%s,y", 9-Chars, "", E->Arg);
+	    Chars += WriteOutput ("%*s%s,y", 9-Chars, "", E->Arg);
 	    break;
 
-	case AM_ZPX_IND:
+	case AM65_ZPX_IND:
 	    /* (zeropage,x) */
-       	    Chars += fprintf (F, "%*s(%s,x)", 9-Chars, "", E->Arg);
+       	    Chars += WriteOutput ("%*s(%s,x)", 9-Chars, "", E->Arg);
 	    break;
 
-	case AM_ZP_INDY:
+	case AM65_ZP_INDY:
 	    /* (zeropage),y */
-       	    Chars += fprintf (F, "%*s(%s),y", 9-Chars, "", E->Arg);
+       	    Chars += WriteOutput ("%*s(%s),y", 9-Chars, "", E->Arg);
 	    break;
 
-	case AM_ZP_IND:
+	case AM65_ZP_IND:
 	    /* (zeropage) */
-       	    Chars += fprintf (F, "%*s(%s)", 9-Chars, "", E->Arg);
+       	    Chars += WriteOutput ("%*s(%s)", 9-Chars, "", E->Arg);
 	    break;
 
-	case AM_BRA:
+	case AM65_BRA:
 	    /* branch */
 	    Target = E->JumpTo? E->JumpTo->Name : E->Arg;
-	    Chars += fprintf (F, "%*s%s", 9-Chars, "", Target);
+	    Chars += WriteOutput ("%*s%s", 9-Chars, "", Target);
 	    break;
 
 	default:
@@ -357,20 +1443,30 @@ void OutputCodeEntry (const CodeEntry* E, FILE* F)
     }
 
     /* Print usage info if requested by the debugging flag */
-//    if (Debug) {
-  	Chars += fprintf (F,
-  			  "%*s; USE: %c%c%c CHG: %c%c%c",
-  			  30-Chars, "",
-       	       	       	  (E->Use & REG_A)? 'A' : '_',
-       	       	       	  (E->Use & REG_X)? 'X' : '_',
-       	       	       	  (E->Use & REG_Y)? 'Y' : '_',
-       	       	       	  (E->Chg & REG_A)? 'A' : '_',
-       	       	       	  (E->Chg & REG_X)? 'X' : '_',
-       	       	       	  (E->Chg & REG_Y)? 'Y' : '_');
-//    }
+    if (Debug) {
+	char Use [128];
+	char Chg [128];
+       	WriteOutput ("%*s; USE: %-12s CHG: %-12s SIZE: %u",
+       	       	     30-Chars, "",
+	    	     RegInfoDesc (E->Use, Use),
+	    	     RegInfoDesc (E->Chg, Chg),
+	       	     E->Size);
+
+        if (E->RI) {
+            char RegIn[32];
+            char RegOut[32];
+            WriteOutput ("    In %s  Out %s",
+                         RegContentDesc (&E->RI->In, RegIn),
+                         RegContentDesc (&E->RI->Out, RegOut));
+        }
+    }
 
+    /* Terminate the line */
+    WriteOutput ("\n");
 }
 
 
 
 
+
+