Added pcodeflow.c - much of pcode.c will eventually get moved here.

[fw/sdcc] / src / pic / pcode.c

diff --git a/src/pic/pcode.c b/src/pic/pcode.c
index 7c2bc0a0604aabc87d717e3f3ba7818c91003f1a..41c8f80dc410da1183a16ac61a8472048b9fb7d4 100644 (file)
--- a/src/pic/pcode.c
+++ b/src/pic/pcode.c
@@ -84,6 +84,7 @@ extern void RemoveUnusedRegisters(void);
 extern void RegsUnMapLiveRanges(void);
 extern void BuildFlowTree(pBlock *pb);
 extern void pCodeRegOptimizeRegUsage(int level);
+extern int picIsInitialized(void);
 
 /****************************************************************/
 /*                      Forward declarations                    */
@@ -434,6 +435,27 @@ pCodeInstruction pciCLRW = {
   PCC_W  // outCond
 };
 
+pCodeInstruction pciCLRWDT = {
+  {PC_OPCODE, NULL, NULL, 0, NULL, 
+   //   genericAnalyze,
+   genericDestruct,
+   genericPrint},
+  POC_CLRWDT,
+  "CLRWDT",
+  NULL, // from branch
+  NULL, // to branch
+  NULL, // label
+  NULL, // operand
+  NULL, // flow block
+  NULL, // C source 
+  0,    // num ops
+  0,0,  // dest, bit instruction
+  0,0,  // branch, skip
+  POC_NOP,
+  PCC_NONE, // inCond
+  PCC_NONE  // outCond
+};
+
 pCodeInstruction pciDECF = {
   {PC_OPCODE, NULL, NULL, 0, NULL, 
    //   genericAnalyze,
@@ -3586,8 +3608,15 @@ void LinkFlow_pCode(pCodeInstruction *from, pCodeInstruction *to)
 
 }
 
-/*-----------------------------------------------------------------*/
-/*-----------------------------------------------------------------*/
+/*-----------------------------------------------------------------*
+ * void LinkFlow(pBlock *pb)
+ *
+ * In BuildFlow, the PIC code has been partitioned into contiguous
+ * non-branching segments. In LinkFlow, we determine the execution
+ * order of these segments. For example, if one of the segments ends
+ * with a skip, then we know that there are two possible flow segments
+ * to which control may be passed.
+ *-----------------------------------------------------------------*/
 void LinkFlow(pBlock *pb)
 {
   pCode *pc=NULL;
@@ -3662,6 +3691,8 @@ void LinkFlow(pBlock *pb)
     
   }
 }
+/*-----------------------------------------------------------------*/
+/*-----------------------------------------------------------------*/
 
 /*-----------------------------------------------------------------*/
 /*-----------------------------------------------------------------*/
@@ -4709,6 +4740,15 @@ void AnalyzeBanking(void)
 {
   pBlock  *pb;
 
+  if(!picIsInitialized()) {
+    fprintf(stderr,"Temporary ERROR: at the moment you have to use\n");
+    fprintf(stderr,"an include file create by inc2h.pl. See SDCC source:\n");
+    fprintf(stderr,"support/scripts/inc2h.pl\n");
+    fprintf(stderr,"this is a nuisance bug that will be fixed shortly\n");
+
+    exit(1);
+  }
+
   /* Phase x - Flow Analysis - Used Banks
    *
    * In this phase, the individual flow blocks are examined