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2018-01-27 22:35:41 +09:00

22 lines
245 B
ArmAsm

.globl zero
.globl putchar
.globl w, r, a, l
/
/
/ routine to zero a string
/
/ mov ...,r1
/ jsr pc,zero
/
zero:
mov r0,-(sp)
mov a(r1),w(r1)
clrb r0
1: cmp w(r1),l(r1)
bhis 1f
jsr pc,putchar
br 1b
1: mov a(r1),w(r1)
mov (sp)+,r0
rts pc