33 lines
437 B
ArmAsm
33 lines
437 B
ArmAsm
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.sect .text; .sect .rom; .sect .data; .sect .bss
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.sect .text
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.define .inn
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! #bytes in ecx
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! bit # in eax
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.inn:
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xor edx,edx
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mov ebx,8
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div ebx
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mov ebx,esp
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add ebx,4
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add ebx,eax
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cmp eax,ecx
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jae 1f
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movb al,(ebx)
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mov ebx,edx
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testb al,bits(ebx)
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jz 1f
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mov eax,1
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jmp 2f
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1:
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xor eax,eax
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2:
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pop ebx
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add esp,ecx
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! eax is result
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jmp ebx
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.sect .rom
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bits:
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.data1 1,2,4,8,16,32,64,128
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