[sdcc-devel] genCast returning result in wrong register

[wizhippo <wiz...@ho...>]

I'm trying to fix the output.  It seams there is a problem with genCast 
for pic14

here is the code i'm tyring to compile

     task_PCL[task_No]    = (byte) a;        // task address low byte
 
I get the folowing code: I highlighted what is wrong

;  task_PCL[task_No]    = (byte) a;        // task address low byte
        MOVF    r0x40,W ;id=304,key=000,flow seq=02d
;;      popGet AOP_PCODE (PO_IMMEDIATE) 1401 _task_PCL
        ADDLW   _task_PCL       ;id=306,key=001,flow seq=02d
;;      1372 regiser idx = 109
        MOVWF   r0x43   ;id=308,key=002,flow seq=02d
;;      popGet AOP_PCODE (PO_IMMEDIATE) 1401 _task_PCL
        MOVLW   high _task_PCL  ;id=310,key=003,flow seq=02d
;;      1372 regiser idx = 110
        MOVWF   r0x44   ;id=312,key=004,flow seq=02d
        BTFSC   STATUS,0        ;id=313,key=005,flow seq=02d
;<>Start of new flow, seq=0x2e ancestor = 0x2d
;;      1372 regiser idx = 110
        INCF    r0x44,F ;id=315,key=000,flow seq=02e
;<>Start of new flow, seq=0x2f ancestor = 0x2d
;;ic
;; ***  genCast  9484
;;      881 register type nRegs=2
;;      881 register type nRegs=1
;;      line = 9492 result AOP_REG=r0x6F, left -=-, right AOP_REG=r0x6B, 
size = 1
;; ***  genCast  9564
;; ***  genCast  9579
;;      1372 regiser idx = 107
        MOVF    r0x41,W ;id=324,key=000,flow seq=02f
;;      1372 regiser idx = 111
        BCF     STATUS,5        ;id=1352,key=000,flow seq=02f
        BCF     STATUS,6        ;id=1353,key=000,flow seq=02f

; **********************************************
;  where did the INDF come from and why is the register commented out?
;  would be good if there was no indf and the movf r0x45 stayed
;  **********************************************
        MOVWF   INDF    ;id=340,key=001,flow seq=02f
;;1     MOVWF   r0x45
;
;*************************************************


;ic
;; ***  genPointerSet  9003
;; ***  genNearPointerSet  8638
;;      881 register type nRegs=2
;; ***  genNearPointerSet  8655
;;      881 register type nRegs=1
;;      line = 8657 result AOP_REG=r0x6D, left -=-, right AOP_REG=r0x6F, 
size = 2
;; ***  genNearPointerSet  8665
;;      1372 regiser idx = 109
        BANKSEL r0x43   ;id=1354,key=000,flow seq=02f
        MOVF    r0x43,W ;id=336,key=003,flow seq=02f
        MOVWF   FSR     ;id=337,key=004,flow seq=02f
;;      1372 regiser idx = 111
;***************************************
;  again the register is commented out
;  ther is a missing  MOVWF   INDF
;***************************************
;;101   MOVF    r0x45,W
;;ic
;***************************************



when looking at gen.c that produces the above code
the genCast function at 9585 has
                                emitpcode(POC_MOVFW, 
popGet(AOP(right),offset));
                                emitpcode(POC_MOVWF, 
popGet(AOP(result),offset));

why is popGet(AOP(result),offset) swapping the destination register for 
indf?

I believe the two errors are related.  The additional mowf ind and the 
missing one.

Any ideas where I would look to fix this or what may be the cause?

I have been searching but can't figure out why it is doing this.