33 lines
551 B
ArmAsm
33 lines
551 B
ArmAsm
.define .csb
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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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.sect .text
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!r0 contains index
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!r1 contains pointer to csb descriptor
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.csb:
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movd 4(r1), r2 !number of entries
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cmpqd 0, r2
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beq 3f
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movd r1, r3
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1:
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addd 8, r3 !find addres of next index
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cmpd 0(r3), r0 !compare indices
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beq 2f
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acbd -1, r2, 1b
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3: !r1 now contains right pointer
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cmpqd 0, 0(r1) !test destination addres
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beq 4f
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movd 0(r1), tos !jump to destination
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ret 4
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2:
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addr 4(r3), r1 !put destination pointer in r1
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br 3b
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4:
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movd ECASE, tos
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jsr @.trp
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ret 0
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