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1a433518c982b3ffc220f245704e69cc8191dfe6
[calu.git]
/
progs
/
sum.s
1
#include "dt_inc.s"
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.data
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.org 0x0
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arr:
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.fill 2
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.fill 3
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.fill 5
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.fill 7
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.fill 11
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.fill 13
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.fill 17
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.fill 19
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.fill 23
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.fill 29
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.fill 31
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.fill 37
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.fill 41
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.fill 43
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.fill 47
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.fill 53
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str:
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.ascii "hier das ergebnis: "
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.text
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.org 0x0
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start:
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br+ main
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br+ main
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ret
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main:
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call+ u_init
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call+ u_recv_byte
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call u_send_newline
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; benchprolog
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call t_init
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call t_stop
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ldis r1, 0
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call t_valset
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call t_start
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; /benchprolog
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; sum start
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ldis r1, 16
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ldis r2, arr@lo
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ldih r2, arr@hi
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call+ sum
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; sum ende
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; benchepilog
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push r0
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call+ t_init
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call+ t_stop
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call+ t_valget
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subi r0, r0, 0xc ; offset abziehen
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pop r3
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push r0
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push r3
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; /benchepilog
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call u_init ; weil r10 ueberschrieben wird
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ldis r1, str@lo
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ldih r1, str@hi
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ldis r2, 19
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call u_send_string
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pop r1
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call+ u_send_uint
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call u_send_newline
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pop r1
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call+ u_send_uint
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call u_send_newline
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br+ main
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sum:
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;r1 = len
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;r2 = arr
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;r3 = i
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;r0 = sum
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;r4 arr data
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ldis r0, 0
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addi r3, r1, 0
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retzs- ; check len != 0
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andx r1, 0x3
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cmpi r1, 0
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breq+ go_loop
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cmpi r1, 1
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addideq r3, r3, 3
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subideq r2, r2, 12
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breq- loop1
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cmpi r1, 2
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addideq r3, r3, 2
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subideq r2, r2, 8
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breq- loop2
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cmpi r1, 3
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addideq r3, r3, 1
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subideq r2, r2, 4
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breq- loop3
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go_loop:
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addi r3, r3, 4
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loop:
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subi r3, r3, 4
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retzs-
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ldw r4, 0(r2)
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add r0, r0, r4
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loop3:
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ldw r4, 4(r2)
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add r0, r0, r4
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loop2:
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ldw r4, 8(r2)
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add r0, r0, r4
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loop1:
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ldw r4, 12(r2)
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add r0, r0, r4
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addi r2, r2, 4*4
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br+ loop