
// Compiler implementation of the D programming language
// Copyright (c) 1999-2009 by Digital Mars
// All Rights Reserved
// written by Walter Bright
// http://www.digitalmars.com
// License for redistribution is by either the Artistic License
// in artistic.txt, or the GNU General Public License in gnu.txt.
// See the included readme.txt for details.

#include	<stdio.h>
#include	<string.h>
#include	<stddef.h>

#include	"mars.h"

#include	"cc.h"
#include	"global.h"
#include	"parser.h"
#include	"oper.h"
#include	"code.h"
#include	"type.h"
#include	"dt.h"
#include	"cgcv.h"

static char __file__[] = __FILE__;	/* for tassert.h		*/
#include	"tassert.h"

extern Global global;

Config config;
Configv configv;

struct Environment;

/**************************************
 * Initialize config variables.
 */

void out_config_init()
{
    Param *params = &global.params;

    if (!config.target_cpu)
    {	config.target_cpu = TARGET_PentiumPro;
	config.target_scheduler = config.target_cpu;
    }
    config.fulltypes = CVNONE;
    config.inline8087 = 1;
    config.memmodel = 0;
    config.flags |= CFGuchar;	// make sure TYchar is unsigned
#if TARGET_WINDOS
    if (params->isX86_64)
	config.exe = EX_WIN64;
    else
	config.exe = EX_NT;

    // Win32 eh
    config.flags2 |= CFG2seh;

    if (params->run)
	config.wflags |= WFexe;		// EXE file only optimizations
    else if (params->link && !global.params.deffile)
	config.wflags |= WFexe;		// EXE file only optimizations
    else if (params->exefile)		// if writing out EXE file
    {	size_t len = strlen(params->exefile);
	if (len >= 4 && stricmp(params->exefile + len - 3, "exe") == 0)
	    config.wflags |= WFexe;
    }
#endif
#if TARGET_LINUX
    if (params->isX86_64)
	config.exe = EX_LINUX64;
    else
	config.exe = EX_LINUX;
    config.flags |= CFGnoebp;
    config.flags |= CFGalwaysframe;
    if (params->pic)
	config.flags3 |= CFG3pic;
#endif
#if TARGET_OSX
    if (params->isX86_64)
	config.exe = EX_OSX64;
    else
	config.exe = EX_OSX;
    config.flags |= CFGnoebp;
    config.flags |= CFGalwaysframe;
    if (params->pic)
	config.flags3 |= CFG3pic;
#endif
    config.flags2 |= CFG2nodeflib;	// no default library
    config.flags3 |= CFG3eseqds;
#if 0
    if (env->getEEcontext()->EEcompile != 2)
	config.flags4 |= CFG4allcomdat;
    if (env->nochecks())
	config.flags4 |= CFG4nochecks;	// no runtime checking
#elif TARGET_OSX
#else
    config.flags4 |= CFG4allcomdat;
#endif
    if (params->trace)
	config.flags |= CFGtrace;	// turn on profiler
    if (params->nofloat)
	config.flags3 |= CFG3wkfloat;

    configv.verbose = params->verbose;

    if (params->optimize)
	go_flag((char *)"-o");

    if (params->symdebug)
    {
#if ELFOBJ || MACHOBJ
	configv.addlinenumbers = 1;
	config.fulltypes = (params->symdebug == 1) ? CVDWARF_D : CVDWARF_C;
#endif
#if OMFOBJ
	configv.addlinenumbers = 1;
	config.fulltypes = CV4;
#endif
	if (!params->optimize)
	    config.flags |= CFGalwaysframe;
    }
    else
    {
	configv.addlinenumbers = 0;
	config.fulltypes = CVNONE;
	//config.flags &= ~CFGalwaysframe;
    }

    if (params->isX86_64)
    {
	util_set64();
	cod3_set64();
    }
    else
    {
	util_set386();
	cod3_set386();
    }

#ifdef DEBUG
    debugb = params->debugb;
    debugc = params->debugc;
    debugf = params->debugf;
    debugr = params->debugr;
    debugw = params->debugw;
    debugx = params->debugx;
    debugy = params->debugy;
#endif
}

/*******************************
 * Redo tables from 8086/286 to 386/486.
 */

void util_set386()
{   int i;

//    if (I32)
    {
	_tyrelax[TYenum] = TYlong;
	_tyrelax[TYint]  = TYlong;
	_tyrelax[TYuint] = TYlong;

	tyequiv[TYint] = TYlong;
	tyequiv[TYuint] = TYulong;

	for (i = 0; i < 0x100; i += 0x40)
	{   tysize[TYenum + i] = LONGSIZE;
	    tysize[TYint  + i] = LONGSIZE;
	    tysize[TYuint + i] = LONGSIZE;
	    tysize[TYjhandle + i] = LONGSIZE;
	    tysize[TYnptr + i] = LONGSIZE;
	    tysize[TYsptr + i] = LONGSIZE;
	    tysize[TYcptr + i] = LONGSIZE;
	    tysize[TYnref + i] = LONGSIZE;
	    tysize[TYfptr + i] = 6;
	    tysize[TYvptr + i] = 6;
	    tysize[TYfref + i] = 6;
	}
    }
}

/*******************************
 * Redo tables from 8086/286 to I64.
 */

void util_set64()
{   int i;

    {
	_tyrelax[TYenum] = TYlong;
	_tyrelax[TYint]  = TYlong;
	_tyrelax[TYuint] = TYlong;

	tyequiv[TYint] = TYlong;
	tyequiv[TYuint] = TYulong;

	for (i = 0; i < 0x100; i += 0x40)
	{   tysize[TYenum + i] = LONGSIZE;
	    tysize[TYint  + i] = LONGSIZE;
	    tysize[TYuint + i] = LONGSIZE;
	    tysize[TYnptr + i] = 8;
	    tysize[TYsptr + i] = 8;
	    tysize[TYcptr + i] = 8;
	    tysize[TYnref + i] = 8;
	    tysize[TYfptr + i] = 10;	// NOTE: There are codgen test that check
	    tysize[TYvptr + i] = 10;	// tysize[x] == tysize[TYfptr] so don't set
	    tysize[TYfref + i] = 10;	// tysize[TYfptr] to tysize[TYnptr]
	}
    }

    TYptrdiff = TYllong;
    TYsize = TYullong;
    TYsize_t = TYullong;
}

/***********************************
 * Return aligned 'offset' if it is of size 'size'.
 */

targ_size_t align(targ_size_t size, targ_size_t offset)
{
    switch (size)
    {
	case 1:
	    break;
	case 2:
	case 4:
	case 8:
	    offset = (offset + size - 1) & ~(size - 1);
	    break;
	default:
	    if (size >= 16)
		offset = (offset + 15) & ~15;
	    else
		offset = (offset + REGSIZE - 1) & ~(REGSIZE - 1);
	    break;
    }
    return offset;
}

/*******************************
 * Get size of ty
 */

targ_size_t size(tym_t ty)
{
    int sz = (tybasic(ty) == TYvoid) ? 1 : tysize(ty);
#ifdef DEBUG
    if (sz == -1)
	WRTYxx(ty);
#endif
    assert(sz!= -1);
    return sz;
}

/*******************************
 * Replace (e) with ((stmp = e),stmp)
 */

elem *exp2_copytotemp(elem *e)
{
    //printf("exp2_copytotemp()\n");
    elem_debug(e);
    Symbol *stmp = symbol_genauto(e);
    elem *eeq = el_bin(OPeq,e->Ety,el_var(stmp),e);
    if (e->Ety == TYstruct)
    {
	eeq->Eoper = OPstreq;
	eeq->Enumbytes = e->Enumbytes;
    }
    return el_bin(OPcomma,e->Ety,eeq,el_var(stmp));
}

/****************************
 * Generate symbol of type ty at DATA:offset
 */

symbol *symboldata(targ_size_t offset,tym_t ty)
{
    symbol *s = symbol_generate(SClocstat, type_fake(ty));
    s->Sfl = FLdata;
    s->Soffset = offset;
    s->Sseg = DATA;
    symbol_keep(s);		// keep around
    return s;
}

/************************************
 * Add symbol to slist.
 */

static list_t slist;

void slist_add(Symbol *s)
{
    list_prepend(&slist,s);
}

/*************************************
 */

void slist_reset()
{
    //printf("slist_reset()\n");
    for (list_t sl = slist; sl; sl = list_next(sl))
    {	Symbol *s = list_symbol(sl);

#if MACHOBJ
	s->Soffset = 0;
#endif
	s->Sxtrnnum = 0;
	s->Stypidx = 0;
	s->Sflags &= ~(STRoutdef | SFLweak);
	if (s->Sclass == SCglobal || s->Sclass == SCcomdat ||
	    s->Sfl == FLudata || s->Sclass == SCstatic)
	{   s->Sclass = SCextern;
	    s->Sfl = FLextern;
	}
    }
}


/**************************************
 */

void backend_init()
{
    ph_init();
    block_init();
    type_init();
    rtlsym_init();
}

void backend_term()
{
}
