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YAPC::EU 2018 Glasgow Update!

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Ingy döt Net 2018-08-17 15:15:24 +01:00
parent 22f33d4004
commit 4e2d22a71d
1170 changed files with 15042 additions and 3047 deletions
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Task/Fibonacci-sequence/360-Assembly/fibonacci-sequence-2.360 Normal file
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* Fibonacci sequence 31/07/2018
* packed dec (PL8) = 15 decimals => max fibo(73)
FIBOWTOP CSECT
USING FIBOWTOP,R13 base register
B 72(R15) skip savearea
DC 17F'0' savearea
SAVE (14,12) save previous context
ST R13,4(R15) link backward
ST R15,8(R13) link forward
LR R13,R15 set addressability
* ----
ZAP FNM2,=P'0' f(0)=0
ZAP FNM1,=P'1' f(1)=1
LA R4,2 n=2
LA R6,1 step
LH R7,NN limit
LOOP EQU * for n=2 to nn
ZAP FN,FNM1 f(n)=f(n-2)
AP FN,FNM2 f(n)=f(n-1)+f(n-2)
CVD R4,PW n
MVC ZN,EM load mask
ED ZN,PW packed dec (PL8) to char (CL16)
MVC WTOBUF+5(2),ZN+L'ZN-2 output
MVC ZN,EM load mask
ED ZN,FN packed dec (PL8) to char (CL16)
MVC WTOBUF+9(L'ZN),ZN output
WTO MF=(E,WTOMSG) write buffer
ZAP FNM2,FNM1 f(n-2)=f(n-1)
ZAP FNM1,FN f(n-1)=f(n)
BXLE R4,R6,LOOP endfor n
* ----
L R13,4(0,R13) restore previous savearea pointer
RETURN (14,12),RC=0 restore registers from calling sav
* ---- DATA
NN DC H'73' nn
FNM2 DS PL8 f(n-2)
FNM1 DS PL8 f(n-1)
FN DS PL8 f(n)
PW DS PL8 15num
ZN DS CL20
* ' b 0 0 0 , 0 0 0 , 0 0 0 , 0 0 0 , 0 0 0' 15num
EM DC XL20'402020206B2020206B2020206B2020206B202120' mask
WTOMSG DS 0F
DC H'80',XL2'0000'
* fibo(73)=806515533049393
WTOBUF DC CL80'fibo(12)=123456789012345 '
REGEQU
END FIBOWTOP