playground:reversing_bits_in_a_byte
Differences
This shows you the differences between two versions of the page.
| Both sides previous revisionPrevious revision | Next revisionBoth sides next revision | ||
| playground:reversing_bits_in_a_byte [2020-02-14 22:46] – verz | playground:reversing_bits_in_a_byte [2020-02-20 21:15] – asl verz | ||
|---|---|---|---|
| Line 21: | Line 21: | ||
| -- | -- | ||
| - | this would be faster | + | this would be equally fast, at 100cycl +rts (enter with the value in .A, result in .A, .X will be 0) |
| < | < | ||
| ldx #8 | ldx #8 | ||
| Line 30: | Line 30: | ||
| lda $2 | lda $2 | ||
| + | rts | ||
| + | </ | ||
| + | |||
| + | or unrolled (56 cycl +rts): | ||
| + | < | ||
| + | asl | ||
| + | ror $2 | ||
| + | asl | ||
| + | ror $2 | ||
| + | asl | ||
| + | ror $2 | ||
| + | asl | ||
| + | ror $2 | ||
| + | asl | ||
| + | ror $2 | ||
| + | asl | ||
| + | ror $2 | ||
| + | asl | ||
| + | ror $2 | ||
| + | asl | ||
| + | lda $2 | ||
| + | rol | ||
| rts | rts | ||
| </ | </ | ||
playground/reversing_bits_in_a_byte.txt · Last modified: 2020-03-12 13:05 by tlr