Edinburgh IMP77 Compiler - Version 8.4
    1 %begin
				.machinemode zarch
				.machine "zEC12"
		.text
		.Ltext0:
				.align	8
		ACKERMANN.6691:
		.LFB186:
		.LVL10:
				stmg	%r10,%r15,80(%r15)
				lay	%r15,-1448(%r15)
				ear	%r1,%a0
				sllg	%r1,%r1,32
				ear	%r1,%a1
				mvc	1440(8,%r15),40(%r1)
    2   %integer %function ackermann(%integer m,n)
		.LVL0:
				stmg	%r11,%r15,88(%r15)
				lay	%r15,-160(%r15)
				lgr	%r11,%r2
				brasl	%r14,_imp_initialise@PLT
		.LVL11:
    3     %result = n+1 %if m = 0
				cgije	%r2,0,.L8
		.L2:
    4     %result = ackermann(m-1,1) %if n = 0
				cgije	%r3,0,.L9
		.L4:
				ahik	%r2,%r3,1
		.LVL5:
				lgfr	%r2,%r2
				br	%r14
		.LVL6:
		.L9:
    5     %result = ackermann(m-1,ackermann(m,n-1))
				ahi	%r3,-1
		.LVL1:
				lgfr	%r3,%r3
				brasl	%r14,ACKERMANN.6691
		.LVL2:
				ahi	%r11,-1
				lgr	%r3,%r2
				lgfr	%r2,%r11
				brasl	%r14,ACKERMANN.6691
		.LVL3:
		.L3:
				ahi	%r2,-1
		.LVL7:
				lghi	%r3,1
		.LVL8:
				lgfr	%r2,%r2
				brasl	%r14,ACKERMANN.6691
		.LVL9:
				j	.L3
		.LFE186:
				.section	.rodata
				.align	2
		.LC0:
				.byte	15
				.string	"Wrong result!  "
				.zero	239
				.align	2
		.LC1:
				.byte	5
				.string	"Done."
				.zero	249
		.text
				.align	8
		.globl main
		main:
		.LFB185:
    6   %end
				lgfr	%r2,%r2
				lg	%r4,272(%r15)
				lmg	%r11,%r15,248(%r15)
				br	%r4
		.LVL4:
		.L8:
    7
    8   %owninteger i,j,k,k1,t1,t2
    9
   10   k = 16;  k1 = 1
				larl	%r1,K.6697
				mvhi	0(%r1),16
   11   %for i = 1,1,6 %cycle
				larl	%r1,K1.6698
				mvhi	0(%r1),1
   12     t1 = cputime            ;! cputime is in clocks_per_tick which is 1000000
				strl	%r2,T1.6699
   13     j = ackermann(3,i)
				lgfrl	%r3,I.6695
				lghi	%r2,3
				brasl	%r14,ACKERMANN.6691
		.LVL24:
				strl	%r2,J.6696
		.LBB36:
		.LBB37:
				brasl	%r14,_imp_cputime@PLT
		.LVL25:
		.LBE37:
		.LBE36:
   14     t2 = cputime
				lhi	%r1,0
		.LBB24:
				lrl	%r1,I.6695
				cije	%r1,6,.L18
		.L13:
				strl	%r2,T2.6700
   15     %if j # k-3 %then printstring("Wrong result!  ") %and newline
				ahi	%r1,1
				strl	%r1,I.6695
		.LBB34:
		.LBB35:
				brasl	%r14,_imp_cputime@PLT
		.LVL23:
		.LBE35:
		.LBE34:
				lrl	%r1,K.6697
				ahi	%r1,-3
				larl	%r2,J.6696
				c	%r1,0(%r2)
				je	.L12
		.LBB38:
   16     print((t2-t1){/1000},7,3)
				larl	%r11,.LC0
		.LBE24:
		.LBB25:
		.LBB26:
				aghik	%r10,%r15,160
				j	.L13
		.L12:
		.LVL12:
		.LBE26:
		.LBE25:
				lrl	%r1,T2.6700
				larl	%r2,T1.6699
		.LVL13:
				s	%r1,0(%r2)
		.LBB28:
		.LBB29:
				lghi	%r3,3
				lghi	%r2,7
		.LVL14:
				cdfbr	%f0,%r1
		.LVL15:
				brasl	%r14,_imp_print@PLT
		.LVL16:
		.LBE29:
		.LBE28:
				mvc	1184(256,%r15),0(%r11)
				mvc	416(256,%r15),1184(%r15)
				mvc	928(256,%r15),416(%r15)
		.LBE38:
		.LBB39:
		.LBB27:
				mvc	160(256,%r15),928(%r15)
				lgr	%r2,%r10
				brasl	%r14,_imp_printstring@PLT
		.LVL26:
		.LBE27:
		.LBE39:
		.LBB40:
		.LBB41:
				brasl	%r14,_imp_newline@PLT
		.LVL27:
				j	.L12
		.L18:
		.L14:
		.LBE41:
		.LBE40:
		.LBB42:
   17     print(3000*(t2-t1)/(512*k1-15*k+9*i+37),7,3)
				lrl	%r4,T2.6700
				larl	%r1,T1.6699
		.LVL17:
				s	%r4,0(%r1)
				mhi	%r4,3000
				lrl	%r1,K1.6698
		.LVL18:
				sll	%r1,9
		.LVL19:
				lrl	%r2,K.6697
				sllk	%r3,%r2,4
				sr	%r2,%r3
				ar	%r1,%r2
		.LVL20:
				lrl	%r3,I.6695
				sllk	%r2,%r3,3
				ar	%r2,%r3
				ar	%r1,%r2
				ahi	%r1,37
				lgfr	%r4,%r4
				lgr	%r3,%r4
				dsgfr	%r2,%r1
				lgr	%r5,%r3
		.LBB30:
		.LBB31:
				lghi	%r3,3
				lghi	%r2,7
				cdfbr	%f0,%r5
				brasl	%r14,_imp_print@PLT
		.LVL21:
		.LBE31:
		.LBE30:
		.LBB32:
		.LBB33:
				brasl	%r14,_imp_newline@PLT
		.LVL22:
		.LBE33:
		.LBE32:
   18     newline
   19     k1 = 4*k1;  k = 2*k
				lrl	%r1,K1.6698
				sll	%r1,2
				strl	%r1,K1.6698
   20   %repeat
				lrl	%r1,K.6697
				sll	%r1,1
				strl	%r1,K.6697
		.LDL1:
   21   printstring("Done."); newline
				larl	%r1,.LC1
				mvc	1184(256,%r15),0(%r1)
				mvc	672(256,%r15),1184(%r15)
				mvc	1184(256,%r15),672(%r15)
		.LBE42:
		.LBB43:
		.LBB44:
				mvc	160(256,%r15),1184(%r15)
				aghik	%r2,%r15,160
				brasl	%r14,_imp_printstring@PLT
		.LVL28:
		.LBE44:
		.LBE43:
		.LBB45:
		.LBB46:
				brasl	%r14,_imp_newline@PLT
		.LVL29:
		.LBE46:
		.LBE45:
		.LBB47:
		.LBB48:
				lghi	%r2,0
				brasl	%r14,exit@PLT
		.LVL30:
		.LBE48:
		.LBE47:
		.LFE185:
				.comm	T2.6700,4,4
				.comm	J.6696,4,4
				.comm	T1.6699,4,4
				.comm	I.6695,4,4
				.comm	K1.6698,4,4
				.comm	K.6697,4,4
		.Letext0:
   22 %endofprogram
   23 Statements compiled