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10.asm
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10.asm
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/*
* Exercise 10
* Description: Sort a[0], a[1] and a[2] in ascending order.
* Author: Dat Tran (HE140517)
*/
.include "beta.uasm"
BR(Begin)
arr:
a0: LONG(8) // a[0]
a1: LONG(6) // a[1]
a2: LONG(9) // a[2]
Begin:
LD(r31, a0, r0) // r0 <-- Mem[a0]
LD(r31, a1, r1) // r1 <-- Mem[a1]
LD(r31, a2, r2) // r2 <-- Mem[a2]
Cmp01:
CMPLT(r0, r1, r3) // if r0 < r1 then r3 = 1 else r3 = 0
BNE(r3, Swap10, r31) // if r3 != 0 then go to Swap10
BR(Cmp02)
Swap10:
ADDC(r0, 0, r4) // r4 <-- r0
ADDC(r1, 0, r0) // r0 <-- r1
ADDC(r4, 0, r1) // r1 <-- r4
Cmp02:
CMPLT(r0, r2, r3) // if r0 < r2 then r3 = 1 else r3 = 0
BNE(r3, Swap20, r31) // if r3 != 0 then go to Swap20
BR(Cmp12)
Swap20:
ADDC(r0, 0, r4) // r4 <-- r0
ADDC(r2, 0, r0) // r0 <-- r2
ADDC(r4, 0, r2) // r2 <-- r4
Cmp12:
CMPLT(r1, r2, r3) // if r1 < r2 then r3 = 1 else r3 = 0
BNE(r3, Swap21, r31) // if r3 != 0 then go to Swap21
BR(SaveMem)
Swap21:
ADDC(r1, 0, r4) // r4 <-- r1
ADDC(r2, 0, r1) // r1 <-- r2
ADDC(r4, 0, r2) // r2 <-- r4
SaveMem:
ST(r0, a0, r31) // r0 --> Mem[a0]
ST(r1, a1, r31) // r1 --> Mem[a1]
ST(r2, a2, r31) // r2 --> Mem[a2]
HALT()