inasm68.c

CC386 is a general-purpose 32-bit C compiler. It is not an optimizing compiler but given that the co

/* 
Copyright 1994-2003 Free Software Foundation, Inc.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA.  

This program is derived from the cc68k complier by 
Matthew Brandt ([e-mail]) 

You may contact the author of this derivative at:

mailto::[e-mail]

or by snail mail at:

David Lindauer
850 Washburn Ave Apt 99
Louisville, KY 40222
 */
/*
 * inline assembler (68k)  not implemented
 */
#include <stdio.h> 
#include <string.h>
#include "lists.h"
#include "expr.h" 
#include "c.h" 
#include "ccerr.h"
#include "gen68.h"

extern long framedepth, stackdepth, lc_maxauto;
extern int prm_68020, prm_68010, prm_smalldata;

extern int asmline;
extern int lastch;
extern int prm_linkreg;
extern enum e_sym lastst;
extern short *lptr;
extern TABLE lsyms;
extern int nextlabel;
extern char lastid[];
extern int linkreg;

ASMREG *keyimage;
ASMREG *regimage;
static SYM *lastsym;
static enum e_op op;
static int theSize;

ASMREG reglst[] = 
{
    {
        "d0", am_dreg, 0, 1
    } , 
    {
        "d1", am_dreg, 1, 1
    }
    , 
    {
        "d2", am_dreg, 2, 1
    }
    , 
    {
        "d3", am_dreg, 3, 1
    }
    , 
    {
        "d4", am_dreg, 4, 1
    }
    , 
    {
        "d5", am_dreg, 5, 1
    }
    , 
    {
        "d6", am_dreg, 6, 1
    }
    , 
    {
        "d7", am_dreg, 7, 1
    }
    , 
    {
        "a0", am_areg, 0, 2
    }
    , 
    {
        "a1", am_areg, 1, 2
    }
    , 
    {
        "a2", am_areg, 2, 2
    }
    , 
    {
        "a3", am_areg, 3, 2
    }
    , 
    {
        "a4", am_areg, 4, 2
    }
    , 
    {
        "a5", am_areg, 5, 2
    }
    , 
    {
        "a6", am_areg, 6, 2
    }
    , 
    {
        "a7", am_areg, 7, 2
    }
    , 
    {
        "sp", am_areg, 7, 2
    }
    , 
    {
        "fp0", am_freg, 0, 3
    }
    , 
    {
        "fp1", am_freg, 1, 3
    }
    , 
    {
        "fp2", am_freg, 2, 3
    }
    , 
    {
        "fp3", am_freg, 3, 3
    }
    , 
    {
        "fp4", am_freg, 4, 3
    }
    , 
    {
        "fp5", am_freg, 5, 3
    }
    , 
    {
        "fp6", am_freg, 6, 3
    }
    , 
    {
        "fp7", am_freg, 7, 3
    }
    , 
    {
        "fpcr", am_fpcr, 0, 5
    }
    , 
    {
        "fpsr", am_fpsr, 0, 5
    }
    , 
    {
        "sfc", am_sfc, 0, 4
    }
    , 
    {
        "dfc", am_dfc, 0, 4
    }
    , 
    {
        "usp", am_usp, 0, 4
    }
    , 
    {
        "vbr", am_vbr, 0, 4
    }
    , 
    {
        "cacr", am_cacr, 0, 4
    }
    , 
    {
        "caar", am_caar, 0, 4
    }
    , 
    {
        "msp", am_msp, 0, 4
    }
    , 
    {
        "isp", am_isp, 0, 4
    }
    , 
    {
        "sr", am_sr, 0, 6
    }
    , 
    {
        "ccr", am_ccr, 0, 6
    }
    , 
    {
        "pc", am_pc, 0, 7
    }
    , 
    {
        0, 0, 0
    }
    , 
};

static AMODE *asm_amode(void);

static void asm_err(int errnum)
{
    *lptr = 0;
    lastch = ' ';
    generror(errnum, 0, 0);
    getsym();
}

//-------------------------------------------------------------------------

int need_010(void)
{
    if (!prm_68010 && !prm_68020)
    {
        asm_err(ERR_AINVSELPROC);
    }
    return prm_68020 || prm_68010;
}

//-------------------------------------------------------------------------

int need_020(void)
{
    if (!prm_68020)
    {
        asm_err(ERR_AINVSELPROC);
    }
    return prm_68020;
}

//-------------------------------------------------------------------------

static ENODE *asm_ident(void)
{
    ENODE *node = 0;
    char *nm;
    int fn = FALSE;
    if (lastst != id)
        asm_err(ERR_IDEXPECT);
    else
    {
        SYM *sp;
        ENODE *qnode = 0;
        nm = litlate(lastid);
        getsym();
        /* No such identifier */
        /* label, put it in the symbol table */
        if ((sp = gsearch(nm)) == 0)
        {
            sp = makesym(sc_ulabel);
            sp->name = nm;
            sp->tp = xalloc(sizeof(TYP));
            sp->tp->type = bt_unsigned;
            sp->tp->uflags = UF_USED;
            sp->tp->bits = sp->tp->startbit =  - 1;
            sp->value.i = nextlabel++;
            insert(sp, &lsyms);
            node = xalloc(sizeof(ENODE));
            node->nodetype = en_labcon;
            node->v.i = sp->value.i;
        }
        else
        {
            /* If we get here the symbol was already in the table
             */
            foundsp: sp->tp->uflags |= UF_USED;
            switch (sp->storage_class)
            {
                case sc_static:
                case sc_global:
                case sc_external:
                case sc_externalfunc:
                case sc_abs:
                    sp->mainsym->extflag = TRUE;
                        if (sp->value.classdata.gdeclare)
                            sp->value.classdata.gdeclare->mainsym->extflag =
                                TRUE;
                    if (sp->tp->type == bt_func || sp->tp->type == bt_ifunc)
                    {
                        /* make a function node */
                        node = makenode(en_napccon, sp, 0);
                        isfunc: 
                    }
                    else
                    /* otherwise make a node for a regular variable */
                        if (sp->absflag)
                            node = makenode(en_absacon, sp, 0);
                        else
                    if (sp->tp->type == bt_func || sp->tp->type == bt_ifunc)
                    {
                        fn = TRUE;
                        node = makenode(en_napccon, sp, 0);
                    }
                        else
                            if (sp->staticlabel)
                                node = makenode(en_nalabcon, sp, 0);
                            else
                                node = makenode(en_nacon, sp, 0);
                    break;
                case sc_const:
                    /* constants and enums */
                    node = makeintnode(en_icon, sp->value.i);
                    break;
                case sc_label:
                case sc_ulabel:
                    node = xalloc(sizeof(ENODE));
                    node->nodetype = en_labcon;
                    node->v.i = sp->value.i;
                    break;
                default:
                     /* auto and any errors */
                    if (sp->storage_class != sc_auto && sp->storage_class !=
                        sc_autoreg)
                    {
                        gensymerror(ERR_ILLCLASS2, sp->name);
                    }
                    else
                    {
                        /* auto variables */
                        if (sp->storage_class == sc_auto)
                            node = makenode(en_autocon, sp, 0);
                        else if (sp->storage_class == sc_autoreg)
                            node = makenode(en_autoreg, sp, 0);
                        if (fn)
                            goto isfunc;
                    }
                    break;
            }

            (node)->cflags = 0;
        }
        lastsym = sp;
    }
    return node;
}

//-------------------------------------------------------------------------

static ENODE *asm_label(void)
{
    char *nm = litlate(lastid);
    ENODE *node;
    SYM *sp;
    getsym();
    /* No such identifier */
    /* label, put it in the symbol table */
    if ((sp = search(lastid, &lsyms)) == 0)
    {
        sp = makesym(sc_label);
        sp->name = litlate(lastid);
        sp->tp = xalloc(sizeof(TYP));
        sp->tp->type = bt_unsigned;
        sp->tp->uflags = 0;
        sp->tp->bits = sp->tp->startbit =  - 1;
        sp->value.i = nextlabel++;
        insert(sp, &lsyms);
    }
    else
    {
        if (sp->storage_class == sc_label)
        {
            asm_err(ERR_DUPLABEL);
            return 0;
        }
        if (sp->storage_class != sc_ulabel)
        {
            asm_err(ERR_ALABEXPECT);
            return 0;
        }
        sp->storage_class = sc_label;
    }
    if (lastst != colon)
    {
        asm_err(ERR_ALABEXPECT);
        return 0;
    }
    getsym();
    node = xalloc(sizeof(ENODE));
    node->nodetype = en_labcon;
    node->v.i = sp->value.i;
    return node;
}

//-------------------------------------------------------------------------

static int asm_getsize(void)
{
    int theSize = 0;
    if (lastst == dot)
    {
        switch (lastch)
        {
            case 'b':
            case 'B':
                theSize = 1;
                break;
            case 'w':
            case 'W':
                theSize = 2;
                break;
            case 'l':
            case 'L':
                theSize = 4;
                break;
            case 's':
            case 'S':
                theSize = 7;
                break;
            case 'd':
            case 'D':
                theSize = 8;
                break;
            case 'x':
            case 'X':
                theSize = 10;
                break;
            default:
                asm_err(ERR_AINVSIZE);
                return 0;
        }
    }
    else
        return 0;

    getch();
    getsym();
    return theSize;
}

//-------------------------------------------------------------------------

static int needsize(int size)
{
    if (theSize != size && theSize != 0)
    {
        asm_err(ERR_AINVSIZE);
        return 0;
    }
    return 1;
}

//-------------------------------------------------------------------------

static int intsize(void)
{
    if (theSize > 4)
    {
        asm_err(ERR_AINVSIZE);
        return 0;
    }
    return 1;
}

//-------------------------------------------------------------------------

static int wordsize(void)
{
    if (theSize > 4 || theSize == 1)
    {
        asm_err(ERR_AINVSIZE);
        return 0;
    }
    return 1;
}

//-------------------------------------------------------------------------

static int need_freg(AMODE **v)
{

    *v = asm_amode();
    if (! *v || (*v)->mode != am_freg)
    {
        asm_err(ERR_ANEEDFP);
        return 0;
    }
    return 1;
}

//-------------------------------------------------------------------------

static int need_adreg(AMODE **v)
{
    *v = asm_amode();
    if (! *v || (*v)->mode != am_areg && (*v)->mode != am_dreg)
    {
        asm_err(ERR_ANEEDAD);
        return 0;
    }
    return 1;
}

//-------------------------------------------------------------------------

static int need_dreg(AMODE **v)
{
    *v = asm_amode();
    if (! *v || (*v)->mode != am_dreg)
    {
        asm_err(ERR_AILLADDRESS);
        return 0;
    }
    return 1;
}

//-------------------------------------------------------------------------

static int need_areg(AMODE **v)
{
    *v = asm_amode();
    if ((*v)->mode != am_areg)
    {
        asm_err(ERR_AILLADDRESS);
        return 0;