diff options
Diffstat (limited to 'Optimizing-assembly-code.md')
| -rw-r--r-- | Optimizing-assembly-code.md | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/Optimizing-assembly-code.md b/Optimizing-assembly-code.md index 93fa03a..8346020 100644 --- a/Optimizing-assembly-code.md +++ b/Optimizing-assembly-code.md @@ -277,7 +277,7 @@ If `CVAL` is $FF (i.e. set `a` to $FF if carry), then do: ```asm ; 3 bytes, 3 cycles sbc a ; if carry, then $ff, else 0 - or NCVAL ; $ff stays $ff, $00 becomes NCVAL + or NCVAL ; $ff stays $ff, $00 becomes NCVAL; omit this if NCVAL is 0 ``` If `NCVAL` is $FF (i.e. set `a` to $FF if not carry), invert carry and do the same: @@ -286,7 +286,7 @@ If `NCVAL` is $FF (i.e. set `a` to $FF if not carry), invert carry and do the sa ; 4 bytes, 4 cycles ccf ; invert carry flag sbc a ; if originally carry, then 0, else $ff - or CVAL ; $00 becomes CVAL, $ff stays $ff + or CVAL ; $00 becomes CVAL, $ff stays $ff; omit this if CVAL is 0 ``` If `CVAL` equals `NCVAL - 1`, then do: |