unpack 5->8

gistfile1.txt

bbba_aaaa <-                4 lda input    | 4 lda input
dccc_ccbb                   2 and #$1f     | 2 and #$1f
eeee_dddd                   4 sta output   | 4 sta output
ggff_fffe
hhhh_hggg

bbxx_xxxx    6 asl input    4 lda input+2  | 4 lda input+1  4 sta ouput+3
cccc_cbbb    6 rol input+1  2 and #$1f     | 4 sta r0
eeed_dddd <- 6 rol input+2  4 sta output+3 | 4 lda input+2
gfff_ffee    6 rol input+3                 | 6 asl r0
hhhh_gggg    6 rol input+4                 | 2 rol A
xxxx_xxxh    6 rol input+5                 | 2 and #$1f

bxxx_xxxx    6 asl input    4 lda input+4  | 4 lda input+3  2 rol A
cccc_bbbb    6 rol input+1  2 and #$1f     | 4 sta r0       2 and #$1f
eexx_xxxc    6 rol input+2  4 sta output+6 | 4 lda input+4  4 sta output+6
ffff_feee    6 rol input+3                 | 6 asl r0
hhhg_gggg <- 6 rol input+4                 | 2 rol A
xxxx_xxhh    6 rol input+5                 | 6 asl r0

xxxx_xxxx                   4 lda input+1  | 4 lda input   2 rol A
cccb_bbbb <- 6 asl input+1  2 and #$1f     | 4 sta r0      2 asl A
exxx_xxcc    6 rol input+2  4 sta output+1 | lda input+1   2 rol A
ffff_eeee    6 rol input+3                 | 6 asl r0      2 and #$1f
hhxx_xxxf    6 rol input+4                 | 2 rol A       4 sta output+1
xxxx_xhhh    6 rol input+5                 | 6 asl r0

xxxx_xxxx                   4 lda input+3  | 4 lda input+2 2 and #$1f
ccxx_xxxx    6 asl input+1  2 and #$1f     | 6 lsr input+3 4 sta output+4
xxxx_xccc    6 rol input+2  4 sta output+4 | 2 ror A
fffe_eeee <- 6 rol input+3                 | 2 lsr A
hxxx_xxff    6 rol input+4                 | 2 lsr A
xxxx_hhhh    6 rol input+5                 | 2 lsr A

xxxx_xxxx                   4 lda input+5  | 4 lda input+4
cxxx_xxxx    6 asl input+1  2 and #$1f     | 2 lsr A
xxxx_cccc    6 rol input+2  4 sta output+7 | 2 lsr A
ffxx_xxxx    6 rol input+3                 | 2 lsr A
xxxx_xfff    6 rol input+4                 | 2 and #$1f
xxxh_hhhh <- 6 rol input+5                 | 4 sta output+7

xxxx_xxxx                   4 lda input+3  | 4 lda input+1
xxxx_xxxx                   2 and #$1f     | 2 lsr A
xxxc_cccc <- 6 asl input+2  4 sta output+2 | 2 lsr A
fxxx_xxxx    6 rol input+3                 | 2 and #$1f
xxxx_ffff    6 rol input+4                 | 4 sta output+2
xxxx_xxxx                                  |

xxxx_xxxx                   4 lda input+4  | 4 lda input+3
xxxx_xxxx                   2 and #$1f     | 2 and #$1f
xxxx_xxxx                   4 sta output+5 | 4 sta output+5
xxxx_xxxx    6 asl input+3                 | 
xxxf_ffff <- 6 rol input+4                 |
xxxx_xxxx                                  |