intxq16.c

来自「开放源码的编译器open watcom 1.6.0版的源代码」· C语言 代码 · 共 77 行

/****************************************************************************
*
*                            Open Watcom Project
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*    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
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*  ========================================================================
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*    This file contains Original Code and/or Modifications of Original
*    Code as defined in and that are subject to the Sybase Open Watcom
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* Description:  WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
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****************************************************************************/


#include "variety.h"
#include <i86.h>

#if defined(__386__)
extern  void            _DoINTR( int, union REGPACK * );
#pragma aux             _DoINTR "*_" parm [eax] [edx];
#else
extern  void            _DoINTR( int, union REGPACK _WCFAR * );
#pragma aux             _DoINTR parm [bx] [ax dx] modify [cx si di es];
#endif

_WCRTLINK int (int86x)( int intno,
                union REGS *inregs,
                union REGS *outregs,
                struct SREGS *segregs )
{
    union REGPACK regs;

    regs.w.ax = inregs->w.ax;
    regs.w.bx = inregs->w.bx;
    regs.w.cx = inregs->w.cx;
    regs.w.dx = inregs->w.dx;
/*  regs.w.bp = inregs->w.bp;   no bp in REGS union */
    regs.w.si = inregs->w.si;
    regs.w.di = inregs->w.di;
    regs.w.flags = inregs->w.cflag;
    regs.w.ds = segregs->ds;
    regs.w.es = segregs->es;

    _DoINTR( intno, &regs );

    outregs->w.ax = regs.w.ax;
    outregs->w.bx = regs.w.bx;
    outregs->w.cx = regs.w.cx;
    outregs->w.dx = regs.w.dx;
/*  outregs->w.bp = regs.w.bp;  no bp in REGS union */
    outregs->w.si = regs.w.si;
    outregs->w.di = regs.w.di;
    outregs->w.cflag = regs.w.flags;
    segregs->ds = regs.w.ds;
    segregs->es = regs.w.es;

    return( outregs->w.ax );
}