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21rang.s
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1980-02-17
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718b
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79 lines
/
/ range checking
/
_RANG42:
bne 1f
mov (lc)+,r3
1:
mov 2(sp),r0
sxt r1
cmp r1,(sp)
bne 9f
br 2f
_RANG2:
bne 1f
mov (lc)+,r3
1:
mov (sp),r0
2:
cmp r0,r3
blt 9f
cmp r0,(lc)+
bgt 9f
return
_RSNG42:
bne 1f
mov (lc)+,r3
1:
mov 2(sp),r0
sxt r1
cmp r1,(sp)
bne 9f
cmp r0,r3
bhi 9f
return
_RSNG2:
bne 1f
mov (lc)+,r3
1:
cmp (sp),r3
bhi 9f
return
_RSNG4:
mov (sp),r0
bmi 9f
mov 2(sp),r1
br 2f
_RSNG24:
mov (sp),r1
bmi 9f
sxt r0
br 2f
_RANG24:
mov (sp),r1
sxt r0
br 1f
_RANG4:
mov (sp),r0
mov 2(sp),r1
1:
cmp r0,(lc)+
blt 9f
bgt 1f
cmp r1,(lc)
blo 9f
1:
tst (lc)+
2:
cmp r0,(lc)+
bgt 9f
blt 1f
cmp r1,(lc)
bhi 9f
1:
tst (lc)+
return
9:
mov $ERANGE,_perrno
error ERANGE