58 lines
686 B
ArmAsm
58 lines
686 B
ArmAsm
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.define .ret
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.define .lfr
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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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! 'ret' and 'lfr' for sizes > 4 (and <= 8)
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retarea: .space 8
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.sect .text
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.ret:
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! parameters:
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! de: size in bytes
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! stack: return value
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pop ix ! save return address
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ld hl,retarea
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srl d
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rr e ! divide size by 2
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1:
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pop bc
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ld (hl), c
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inc hl
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ld (hl), b
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inc hl
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dec de
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ld a,d
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or e
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jr nz,1b ! done?
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jp (ix) ! yes, return
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.lfr:
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! parameters:
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! de: size in bytes
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! result on stack: return value
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pop ix ! save return address
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ld hl,retarea
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add hl,de
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srl d
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rr e ! divide size by 2
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1:
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dec hl
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ld b,(hl)
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dec hl
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ld c,(hl)
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push bc
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dec de
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ld a,d
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or e
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jr nz,1b ! done?
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jp (ix) ! yes, return
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