Misc/abrash-black-book
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James Gregory 2013-12-30 18:34:31 +11:00
commit 18011c595a
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16-05.md
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@ -104,7 +104,7 @@ Table 16.2 The top four word-counting entries.
in-a-word/not-in-a-word status. The count register is masked to
remove the high bit and the count of words remains in the count
register.
Sound complicated? You’re right! But it’s fast!
Sound complicated? You're right! But it's fast!
The beauty of this method is that no jumps are required, the
operations are fast, it requires only one table and the process can
@ -153,7 +153,7 @@ Table 16.2 The top four word-counting entries.
mov di,[bp+CharFlag]
mov bh,[di] ;bh = old CharFlag
mov bl,[si] ;bl = character
add bh,‘A’-1 ;make bh into character
add bh,‘A'-1 ;make bh into character
add bx,bx ;prepare to index
mov al,es:[bx]
cbw ;get hi bit in ah (then bh)