| 1 | ; $Id: U8D-x86-32.asm 93115 2022-01-01 11:31:46Z vboxsync $
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| 2 | ;; @file
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| 3 | ; BS3Kit - 32-bit Watcom C/C++, 64-bit unsigned integer division.
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| 4 | ;
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| 5 |
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| 6 | ;
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| 7 | ; Copyright (C) 2007-2022 Oracle Corporation
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| 8 | ;
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| 9 | ; This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | ; available from http://www.virtualbox.org. This file is free software;
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| 11 | ; you can redistribute it and/or modify it under the terms of the GNU
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| 12 | ; General Public License (GPL) as published by the Free Software
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| 13 | ; Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | ; VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | ; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | ;
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| 17 | ; The contents of this file may alternatively be used under the terms
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| 18 | ; of the Common Development and Distribution License Version 1.0
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| 19 | ; (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | ; VirtualBox OSE distribution, in which case the provisions of the
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| 21 | ; CDDL are applicable instead of those of the GPL.
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| 22 | ;
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| 23 | ; You may elect to license modified versions of this file under the
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| 24 | ; terms and conditions of either the GPL or the CDDL or both.
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| 25 | ;
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| 26 |
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| 27 | %include "iprt/asmdefs.mac"
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| 28 |
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| 29 |
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| 30 | BEGINCODE
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| 31 |
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| 32 | extern NAME(RTWatcomUInt64Div)
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| 33 |
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| 34 |
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| 35 | ;;
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| 36 | ; 64-bit unsigned integer division.
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| 37 | ;
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| 38 | ; @returns EDX:EAX Quotient, ECX:EBX Remainder.
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| 39 | ; @param EDX:EAX Dividend.
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| 40 | ; @param ECX:EBX Divisor
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| 41 | ;
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| 42 | global __U8D
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| 43 | __U8D:
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| 44 | ;
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| 45 | ; Convert to a C __cdecl call - not doing this in assembly.
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| 46 | ;
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| 47 |
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| 48 | ; Set up a frame, allocating 16 bytes for the result buffer.
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| 49 | push ebp
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| 50 | mov ebp, esp
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| 51 | sub esp, 10h
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| 52 |
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| 53 | ; Pointer to the return buffer.
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| 54 | push esp
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| 55 |
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| 56 | ; The divisor.
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| 57 | push ecx
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| 58 | push ebx
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| 59 |
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| 60 | ; The dividend.
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| 61 | push edx
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| 62 | push eax
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| 63 |
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| 64 | call NAME(RTWatcomUInt64Div)
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| 65 |
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| 66 | ; Load the result.
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| 67 | mov ecx, [ebp - 10h + 12]
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| 68 | mov ebx, [ebp - 10h + 8]
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| 69 | mov edx, [ebp - 10h + 4]
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| 70 | mov eax, [ebp - 10h]
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| 71 |
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| 72 | leave
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| 73 | ret
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| 74 |
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