40 lines
584 B
ArmAsm
40 lines
584 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 .sar4
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.sar4:
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! ebx, descriptor address
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! eax, index
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pop ecx
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pop edx ! base address
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push ecx
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sub eax,(ebx)
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mov ecx,8(ebx)
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push edx
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imul ecx
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pop edx
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add edx,eax
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sar ecx,1
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jnb 1f
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pop ebx
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pop eax
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movb (edx),al
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jmp ebx
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1:
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sar ecx,1
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jnb 1f
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pop ebx
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pop eax
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o16 mov (edx),ax
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jmp ebx
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1:
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pop ebx
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xchg edi,edx ! edi = base address, edx is saved edi
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mov eax,esi
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mov esi,esp
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rep movs
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mov esp,esi
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mov esi,eax
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mov edi,edx
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jmp ebx
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