Remove signed pointer comparison

Linked lists end with NULL, not <= 0.

Remove signed pointer comparison
Linked lists end with NULL, not <= 0.
a119c768 · Robert Sprowson · ROOL · 110fd564 · a119c768 · a119c768
Commit a119c768 authored Dec 22, 2019 by Robert Sprowson Committed by ROOL Jan 18, 2020
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Showing with 3 additions and 3 deletions

s/FilterMgr s/FilterMgr +2 -2

s/Tail s/Tail +1 -1

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--- a/s/FilterMgr
+++ b/s/FilterMgr
@@ -80,8 +80,8 @@ $lab    ADD$cc  $to,$from,#1
 ; ----------------------------------------------------------------------------------------------------------------------
 ;      Filter block structure
                ^       0
-next_ptr        #       4       ;       Pointer to next in chain                (-1 if none)
-prev_ptr        #       4       ;       Pointer to previous entry in chain      (-1 if none)
+next_ptr        #       4       ;       Pointer to next in chain                     (0 if none)
+prev_ptr        #       4       ;       Pointer to previous entry in chain           (0 if none)
 f_task          #       4       ;       Task ID for which the filter is to be called.
 f_mask          #       4       ;       Event mask.
 f_address       #       4       ;       Address to call.

--- a/s/Tail
+++ b/s/Tail
@@ -28,7 +28,7 @@ free_list
 01
        MOV     r0, #ModHandReason_Free
        SUBS    r2, r1, #0
-        MOVLE   PC, R3
+        MOVEQ   PC, R3
 ; Free the workspace
        LDR     r1, [r2,#next_ptr]
        SWI     XOS_Module