25 lines
458 B
ArmAsm
25 lines
458 B
ArmAsm
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#include "powerpc.h"
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.sect .text
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! Set symmetric difference.
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! Stack: ( b a -- a/b )
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! With r3 = size of set
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.define .xor
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.xor:
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mr r4, sp ! r4 = ptr to set a
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add r5, sp, r3 ! r5 = ptr to set b
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rlwinm r6, r3, 30, 2, 31
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mtspr ctr, r6 ! ctr = r3 / 4
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1:
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lwz r7, 0(r4)
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lwz r8, 0(r5)
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xor r8, r7, r8 ! symmetric difference of words
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stw r8, 0(r5)
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addi r4, r4, 4
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addi r5, r5, 4
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bc DNZ, 0, 1b ! loop ctr times
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add sp, sp, r3
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bclr ALWAYS, 0, 0
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