29 lines
525 B
ArmAsm
29 lines
525 B
ArmAsm
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#
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.sect .text; .sect .rom; .sect .data; .sect .bss
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/* Duplicates some words on top of stack.
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* Stack: ( a size -- a a )
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*/
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.sect .text
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.define .dus4
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.dus4:
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lw r4, 0(sp) ! r4 = size
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addiu sp, sp, 4 ! sp = pointer to a
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mov r5, sp ! r5 = pointer to a
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subu sp, sp, r4 ! sp = pointer to newa
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mov r6, sp ! r6 = pointer to b
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srl r4, r4, 2 ! r4 = number of words
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1:
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lw at, 0(r5)
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sw at, 0(r6)
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addiu r5, r5, 4
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addiu r6, r6, 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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