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Fixed outdated comments.

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This commit is contained in:
Greg King 2020-12-27 18:22:12 -05:00
parent 9800555bbb
commit d90cd11212
1 changed files with 7 additions and 7 deletions
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14
libsrc/common/memcmp.s
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@ -10,8 +10,8 @@
_memcmp:
; Calculate (-count-1) and store it into ptr3. This is some overhead here but
; saves time in the compare loop
; Calculate a special count, and store it into ptr3. That is some overhead here,
; but saves time in the compare loop
inx
stx ptr3+1
@ -29,12 +29,12 @@ _memcmp:
; Loop initialization
;ldy #$00 ; Initialize pointer (Y=0 guaranteed by popptr1)
ldx ptr3 ; Load low counter byte into X
ldx ptr3 ; Load inner counter byte into .X
; Head of compare loop: Test for the end condition
Loop: dex ; Bump low byte of (-count-1)
beq BumpHiCnt ; Jump on overflow
Loop: dex
beq BumpHiCnt ; Jump on end of inner count
; Do the compare
@ -50,10 +50,10 @@ Comp: lda (ptr1),y
inc ptr2+1
bne Loop ; Branch always (pointer wrap is illegal)
; Entry on low counter byte overflow
; Entry on inner loop end
BumpHiCnt:
dec ptr3+1 ; Bump high byte of (-count-1)
dec ptr3+1
bne Comp ; Jump if not done
jmp return0 ; Count is zero, areas are identical