41 lines
469 B
ArmAsm
41 lines
469 B
ArmAsm
.define .set2
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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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! Create 16 bits set with one bit on
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! Expects in de-reg: bit number
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! Yields in de-reg: resulting set
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.set2: mov a,d !trap if bit number >= 16
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ora a
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cnz eset
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mov a,e
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cpi 16
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cnc eset
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pop h
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shld .retadr
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mov a,e
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ani 7
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mov d,a
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mvi a,1
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1: dcr d
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jm 2f
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rlc
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jmp 1b
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2: mov d,a
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mov a,e
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ani 8
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jnz 3f ! jump if bit 3 is set
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mov e,d
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mvi d,0
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jmp 4f
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3: mvi e,0
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4: lhld .retadr
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pchl
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