33 lines
734 B
ArmAsm
33 lines
734 B
ArmAsm
.define .aar
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.sect .text
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.sect .rom
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.sect .data
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.sect .bss
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.sect .text
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EILLINS = 18
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.aar: ! (on entry d0 contains the integer size in the descriptor)
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cmp.l #4, d0
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beq 9f
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move.l #EILLINS, -(sp)
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jmp (.fatal)
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9:
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! register usage:
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! a0: descriptor address
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! a1: return address
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! d0: index
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! The address is calculated by taking the relative index
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! (index - lower bound), multiplying that with the element
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! size and adding the result to the array base address.
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move.l (sp)+, a1 ! return address
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move.l (sp)+, a0 ! descriptor address
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move.l (sp)+, d0 ! index
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sub.l (a0), d0 ! relative index
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muls.l (8,a0), d0
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move.l (sp)+, a0 ! array base address
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add.l d0, a0 ! address of array element
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jmp (a1) ! return
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.align 2
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