48 lines
516 B
ArmAsm
48 lines
516 B
ArmAsm
|
.define .rol4
|
||
|
|
|
||
|
|
! Rotate 4 bytes left
|
||
|
|
! Expects in de-reg: number of rotates
|
||
|
|
! Expects on stack: operand
|
||
|
|
! Yields on stack: result
|
||
|
|
|
||
|
|
.rol4 pop h
|
||
|
|
shld .retadr
|
||
|
|
mov h,b
|
||
|
|
mov l,c
|
||
|
|
shld .bcreg
|
||
|
|
|
||
|
|
.rol4: pop h ! low-order bytes of operand
|
||
|
|
pop b ! high order bytes of operand
|
||
|
|
|
||
|
|
mov a,e
|
||
|
|
ani 31
|
||
|
|
jz 2f
|
||
|
|
mov e,a
|
||
|
|
|
||
|
|
mov a,b
|
||
|
|
ral
|
||
|
|
1: mov a,l
|
||
|
|
ral
|
||
|
|
mov l,a
|
||
|
|
mov a,h
|
||
|
|
ral
|
||
|
|
mov h,a
|
||
|
|
mov a,c
|
||
|
|
ral
|
||
|
|
mov c,a
|
||
|
|
mov a,b
|
||
|
|
ral
|
||
|
|
mov b,a
|
||
|
|
|
||
|
|
dcr e
|
||
|
|
jnz 1b ! keep looping
|
||
|
|
|
||
|
|
2: push b
|
||
|
|
push h
|
||
|
|
|
||
|
|
lhld .bcreg
|
||
|
|
mov b,h
|
||
|
|
mov c,l
|
||
|
|
lhld .retadr
|
||
|
|
pchl
|