ack/mach/z8000/libem/inn.s

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1985-01-08 11:48:43 +00:00
.define inn
1987-01-19 10:51:50 +00:00
.sect .text
.sect .rom
.sect .data
.sect .bss
.sect .text
1985-01-08 11:48:43 +00:00
!bitnr in R1
!size (bytes) in R2
inn:
ld R3, R2
sra R2
ldk R0, $0
div RR0, $020 !R0: bitnr, R1: wordnr
cp R1, R2
jr UGE, 1f !R1 must be < R2
inc R1, $2 !R1 contains nr of words from top stack
sla R1
ld R1, RR14(R1)
bit R1, R0
jr EQ, 1f
ldk R0, $1
jr 2f
1: ldk R0, $0
2: ld R1, R3
popl RR2, *RR14
add R15, R1
jp *RR2