31 lines
509 B
ArmAsm
31 lines
509 B
ArmAsm
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#
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.sect .text; .sect .rom; .sect .data; .sect .bss
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/*
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* Set xor..
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* Stack: ( a b size -- a^b )
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*/
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.sect .text
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.define .xor
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.xor:
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lw r4, 0(sp) ! r4 = size
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addiu sp, sp, 4 ! sp points at b
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addu r5, sp, r4 ! r5 points at a
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srl r4, r4, 2 ! r4 = count of words
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1:
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lw at, 0(r5) ! load a
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lw r6, 0(sp) ! load b
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xor at, at, r6 ! combine
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sw at, 0(r5) ! write back to a
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addiu r5, r5, 4
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addiu sp, sp, 4
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addiu r4, r4, -1
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bne r4, zero, 1b
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nop
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jr ra
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nop
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