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kolibrios-gitea/programs/develop/open watcom/trunk/clib/cgsupp/ldiv386.asm
Sergey Semyonov (Serge) 836c97f0ac Clib string & memory functions
git-svn-id: svn://kolibrios.org@553 a494cfbc-eb01-0410-851d-a64ba20cac60
2007-06-26 00:54:22 +00:00

80 lines
3.0 KiB
NASM

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