parm.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 96 行

/****************************************************************************
*
*                            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
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*    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.
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*  ========================================================================
*
* Description:  WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
*               DESCRIBE IT HERE!
*
****************************************************************************/


#include "standard.h"
#include "coderep.h"
#include "opcodes.h"
#include "sysmacro.h"
#include "procdef.h"
#include "cgdefs.h"
#include "typedef.h"
#include "regset.h"
#include "zoiks.h"
#include "feprotos.h"


extern  hw_reg_set      InLineParm(hw_reg_set,hw_reg_set);
extern  reg_list        *ParmChoices(type_class_def);
extern  type_def        *TypeAddress(cg_type);
extern  hw_reg_set      ParmRegConflicts(hw_reg_set);

extern    type_length   MaxStack;


extern  hw_reg_set      ParmInLineReg( parm_state *state ) {
/**********************************************************/

    hw_reg_set  regs;

    regs = *state->curr_entry;
    if( !HW_CEqual( regs, HW_EMPTY ) ) {
        state->curr_entry++;
    }
    regs = InLineParm( regs, state->used );
    HW_TurnOn( state->used, regs );
    return( regs );
}

extern type_length      ParmMem( type_length length, type_length alignment, call_state *state ) {
/***********************************************************************************************/

    type_length     offset;
    type_length     word_size;

    word_size = REG_SIZE;
    #if _TARGET & _TARG_80386
        if( _RoutineIsFar16( state->attr ) ) {
            // use 16-bit word size for rounding
            word_size >>= 1;
        }
    #endif
    offset = state->parm.offset;
    if( offset & ( alignment - 1 ) ) {
        offset = ( offset + alignment - 1 ) & ~ ( alignment - 1 );
    }
    state->parm.offset = offset + _RoundUp( length, word_size );
    if( state->parm.offset > MaxStack ) {
        MaxStack = state->parm.offset;
    }
    return( offset );
}

extern  type_def        *QParmType( sym_handle func, sym_handle parm, type_def *tipe ) {
/**************************************************************************************/

    return( TypeAddress( FEParmType( func, parm, tipe->refno ) ) );
}