80 lines
3.0 KiB
NASM
80 lines
3.0 KiB
NASM
;*****************************************************************************
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;*
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;* Open Watcom Project
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;*
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;* Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
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;*
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;* ========================================================================
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;*
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;* This file contains Original Code and/or Modifications of Original
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;* Code as defined in and that are subject to the Sybase Open Watcom
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;* Public License version 1.0 (the 'License'). You may not use this file
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;* except in compliance with the License. BY USING THIS FILE YOU AGREE TO
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;* ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
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;* provided with the Original Code and Modifications, and is also
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;* available at www.sybase.com/developer/opensource.
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;*
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;* The Original Code and all software distributed under the License are
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;* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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;* EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
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;* ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
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;* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
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;* NON-INFRINGEMENT. Please see the License for the specific language
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;* governing rights and limitations under the License.
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;*
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;* ========================================================================
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;*
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;* Description: Signed 4-byte division for 386.
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;*
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;*****************************************************************************
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;========================================================================
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;== Name: LDIV ==
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;== Operation: Signed 4 byte divide ==
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;== Inputs: EAX Dividend ==
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;== EDX/ECX Divisor ==
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;== SS:ESI pointer to result structure ==
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;== Volatile: none ==
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;========================================================================
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include mdef.inc
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include struct.inc
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ifdef _PROFILE
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include p5prof.inc
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endif
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modstart ldiv386
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defpe div
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xdefp "C",div
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defpe ldiv
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xdefp "C",ldiv
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ifdef _PROFILE
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P5Prolog
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endif
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ifdef __STACK__
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mov EAX,4[ESP] ; get numerator
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mov ECX,8[ESP] ; get divisor
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; we don't need to save/restore ECX
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else
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push ECX ; save ECX
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mov ECX,EDX ; get divisor
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endif
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cdq ; sign extend dividend
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idiv ECX ; do the divide
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mov [ESI],EAX ; store quotient
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mov 4[ESI],EDX ; store remainder
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ifndef __STACK__
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pop ECX ; restore ECX
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endif
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ifdef _PROFILE
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P5Epilog
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endif
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ret ; return
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endproc ldiv
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endproc div
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endmod
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end
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