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INASM386.C
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1997-06-13
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/*
* 68K/386 32-bit C compiler.
*
* copyright (c) 1997, David Lindauer
*
* This compiler is intended for educational use. It may not be used
* for profit without the express written consent of the author.
*
* It may be freely redistributed, as long as this notice remains intact
* and either the original sources or derived sources
* are distributed along with any executables derived from the originals.
*
* The author is not responsible for any damages that may arise from use
* of this software, either idirect or consequential.
*
* v1.35 March 1997
* David Lindauer, gclind01@starbase.spd.louisville.edu
*
* Credits to Mathew Brandt for original K&R C compiler
*
*/
/*
* inline assembler (386)
*/
#include <stdio.h>
#include "expr.h"
#include "c.h"
#include "errors.h"
#include "gen386.h"
extern long framedepth, stackdepth, lc_maxauto;
extern int asmline;
extern int lastch;
extern int prm_linkreg;
extern enum e_sym lastst;
extern long ival;
extern short *lptr ;
extern TABLE lsyms;
extern int nextlabel;
extern char lastid[];
ASMNAME *keyimage;
ASMREG *regimage;
static SYM *lastsym;
static enum e_op op;
ASMREG reglst[] = {
{ "cs",am_seg,1,2 },
{ "ds",am_seg,2,2 },
{ "es",am_seg,3,2 },
{ "fs",am_seg,4,2 },
{ "gs",am_seg,5,2 },
{ "ss",am_seg,6,2 },
{ "al",am_dreg,0,1 },
{ "cl",am_dreg,1,1 },
{ "dl",am_dreg,2,1 },
{ "bl",am_dreg,3,1 },
{ "ah",am_dreg,4,1 },
{ "ch",am_dreg,5,1 },
{ "dh",am_dreg,6,1 },
{ "bh",am_dreg,7,1 },
{ "ax",am_dreg,0,2 },
{ "cx",am_dreg,1,2 },
{ "dx",am_dreg,2,2 },
{ "bx",am_dreg,3,2 },
{ "sp",am_dreg,4,2 },
{ "bp",am_dreg,5,2 },
{ "si",am_dreg,6,2 },
{ "di",am_dreg,7,2 },
{ "eax",am_dreg,0,4 },
{ "ecx",am_dreg,1,4 },
{ "edx",am_dreg,2,4 },
{ "ebx",am_dreg,3,4 },
{ "esp",am_dreg,4,4 },
{ "ebp",am_dreg,5,4 },
{ "esi",am_dreg,6,4 },
{ "edi",am_dreg,7,4 },
{ "st",am_freg,0,10 },
{ "cr0",am_screg,0,4 },
{ "cr1",am_screg,2,4 },
{ "cr2",am_screg,3,4 },
{ "cr3",am_screg,4,4 },
{ "cr4",am_screg,5,4 },
{ "cr5",am_screg,6,4 },
{ "cr6",am_screg,7,4 },
{ "cr7",am_screg,8,4 },
{ "dr0",am_sdreg,0,4 },
{ "dr1",am_sdreg,2,4 },
{ "dr2",am_sdreg,3,4 },
{ "dr3",am_sdreg,4,4 },
{ "dr4",am_sdreg,5,4 },
{ "dr5",am_sdreg,6,4 },
{ "dr6",am_sdreg,7,4 },
{ "dr7",am_sdreg,8,4 },
{ "tr0",am_streg,0,4 },
{ "tr1",am_streg,2,4 },
{ "tr2",am_streg,3,4 },
{ "tr3",am_streg,4,4 },
{ "tr4",am_streg,5,4 },
{ "tr5",am_streg,6,4 },
{ "tr6",am_streg,7,4 },
{ "tr7",am_streg,8,4 },
{ "st",am_freg,0,4 },
{ "byte", am_ext,akw_byte,0 },
{ "word", am_ext,akw_word,0 },
{ "dword", am_ext,akw_dword,0 },
{ "fword", am_ext,akw_fword,0 },
{ "qword", am_ext,akw_qword,0 },
{ "tbyte", am_ext,akw_tbyte,0 },
{ "ptr", am_ext, akw_ptr,0 },
{ "offset", am_ext,akw_offset,0 },
{ 0 , 0 , 0 },
};
static int floating;
void inasmini(void)
{
}
static void asm_err(int errnum)
{
*lptr = 0;
lastch = ' ';
generror(errnum,0,0);
getsym();
}
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 = xalloc(sizeof(SYM));
sp->name = nm;
sp->storage_class = sc_ulabel;
sp->tp = xalloc(sizeof(TYP));
sp->tp->type = bt_unsigned;
sp->tp->uflags = UF_USED;
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->extflag = TRUE;
if (sp->tp->type == bt_ptrfunc || sp->tp->type == bt_func || sp->tp->type == bt_ifunc) {
/* make a function node */
if (sp->tp->type == bt_ptrfunc)
node = makenode(en_nacon,sp,0);
else
node = makenode(en_napccon,sp,0);
isfunc:
if (sp->tp->type != bt_ptrfunc && sp->tp->type != bt_func && sp->tp->type != bt_ifunc)
generror(ERR_MISMATCH,0,0);
}
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,(char *)sp->value.i,0);
else
node = makenode(en_nacon,sp,0);
break;
case sc_const:
/* constants and enums */
node = makenode(en_icon,(char *)sp->value.i,0);
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 = xalloc(sizeof(SYM));
sp->name = litlate(lastid);
sp->storage_class = sc_label;
sp->tp = xalloc(sizeof(TYP));
sp->tp->type = bt_unsigned;
sp->tp->uflags = 0;
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 sz=0;
switch (regimage->regnum) {
case akw_byte: sz = 1; break;
case akw_word: sz = 2; break;
case akw_dword: sz = floating ? 6 : 4; break;
case akw_fword: sz = 6; break;
case akw_qword: sz = 8; break;
case akw_tbyte: sz = 10; break;
case akw_offset: sz = 4; break;
};
getsym();
if (lastst == kw_asmreg) {
regimage = keyimage;
if (regimage->regtype == am_ext) {
if (regimage->regnum != akw_ptr) {
asm_err(ERR_AILLADDRESS);
return 0;
}
getsym();
}
}
if (lastst != kw_asmreg && lastst != openbr && lastst != id) {
asm_err(ERR_AMODEEXPECT);
return 0;
}
regimage=keyimage;
return sz;
}
static int getscale (int *scale)
{
if (lastst == star) {
getsym();
if (lastst == iconst && !*scale)
if (ival== 1 || ival==2 || ival==4 || ival==8) {
if (ival < 3)
ival--;
else
ival = ival/4+1;
*scale =ival;
getsym();
return 1;
}
asm_err(ERR_ASCALE);
*scale = -1;
return 1;
}
return 0;
}
int asm_enterauto(ENODE *node, int *reg1, int *reg2)
{
if (node && (node->nodetype == en_autocon || node->nodetype == en_autoreg)) {
int *vreg;
if (*reg1 >=0 && *reg2 >=0) {
asm_err(ERR_AINVINDXMODE);
return 0;
}
if (reg1 < 0)
vreg = reg1;
else
vreg = reg2 ;
*vreg = ESP;
if (prm_linkreg) {
*vreg = EBP;
}
return 1;
}
return 2;
}
static AMODE *asm_mem(void)
{
int reg1=-1, reg2=-1, scale=0, temp,sz=0;
ENODE *node=0;
AMODE *rv;
int gotident = FALSE,autonode = FALSE;
while (TRUE) {
int rg;
getsym();
regimage = keyimage;
rg = regimage->regnum;
switch(lastst) {
case kw_asmreg:
regimage = keyimage;
if (regimage->regtype != am_dreg || regimage->size != 4) {
asm_err(ERR_AINVINDXMODE);
return 0;
}
if (reg1 >= 0) {
if (reg2 >=0) {
asm_err(ERR_AINVINDXMODE);
return 0;
}
reg2 = rg;
getsym();
getscale(&scale);
if (scale == -1)
return 0;
}
else {
getsym();
if (getscale(&scale)) {
if (scale == -1)
return 0;
if (reg2 >= 0) {
reg1 = reg2;
}
reg2 = rg;
}
else {
reg1 = rg;
}
}
break;
case iconst:
if (node)
node = makenode(en_add,node,makenode(en_icon,(char *)intexpr(0),0));
else
node = makenode(en_icon,(char *)intexpr(0),0);
break;
case id:
if (gotident) {
asm_err(ERR_AINVINDXMODE);
return 0;
}
node = asm_ident();
gotident = TRUE;
sz = lastsym->tp->size;
switch(asm_enterauto(node,®1,®2)) {
case 0:
return 0;
case 1:
autonode = TRUE;
break;
case 2:
autonode = FALSE;
break;
}
break;
default:
asm_err(ERR_AILLADDRESS);
return 0;
}
if (lastst == closebr) {
getsym();
break;
}
if (lastst != plus) {
asm_err(ERR_AINVINDXMODE);
return 0;
}
}
if ((reg2 == 4 || reg2 == 5) && scale > 1) {
asm_err(ERR_AINVINDXMODE);
return 0;
}
rv = xalloc(sizeof(AMODE));
if (node) {
rv->offset = node;
}
if (reg1 >=0) {
rv->preg = reg1;
if (reg2 >=0) {
rv->sreg = reg2;
rv->scale = scale;
rv->mode = am_indispscale;
}
else {
rv->mode = am_indisp;
}
}
else
if (reg2 >=0) {
rv->preg = -1;
rv->sreg = reg2;
rv->scale = scale;
rv->mode = am_indispscale;
}
else
rv->mode = am_direct;
return rv;
}
static AMODE *asm_amode(int nosegreg)
{
AMODE *rv=xalloc(sizeof(AMODE));
int sz = 0,seg=0;
lastsym = 0;
switch (lastst) {
case iconst:
case iuconst:
case lconst:
case luconst:
case cconst:
case kw_asmreg:
case openbr:
case id:
break;
default:
asm_err(ERR_AMODEEXPECT);
return 0;
}
if (lastst== kw_asmreg) {
regimage = keyimage;
if (regimage->regtype == am_ext) {
sz = asm_getsize();
regimage = keyimage;
}
}
loop:
switch (lastst) {
case kw_asmreg:
if (regimage->regtype == am_ext) {
asm_err(ERR_ATOOMANYSPECS);
return 0;
}
if (regimage->regtype == am_freg) {
getsym();
if (lastst == openpa) {
getsym();
if (lastst != iconst || ival < 0 || ival > 7) {
asm_err(ERR_ANEEDFP);
return 0;
}
getsym();
needpunc(closepa,0);
}
else ival = 0;
rv->preg = ival;
rv->mode = am_freg;
sz = 10;
}
else if (regimage->regtype == am_seg) {
if (rv->seg) {
asm_err(ERR_ATOOMANYSEGS);
return 0;
}
rv->seg = seg = regimage->regnum;
getsym();
if (lastst == colon) {
getsym();
goto loop;
}
rv->mode = am_seg;
sz = regimage->size;
}
else {
rv->preg = regimage->regnum;
rv->mode = regimage->regtype;
sz = regimage->size;
getsym();
}
break;
case openbr:
rv = asm_mem();
break;
case id:
rv->mode = am_immed;
rv->offset = asm_ident();
rv->length = 4;
if (rv->offset->nodetype == en_autocon || rv->offset->nodetype == en_autoreg) {
asm_err(ERR_AUSELEA);
return 0;
}
break;
case iconst:
case iuconst:
case lconst:
case luconst:
case cconst:
rv = make_immed(ival);
getsym();
break;
default:
asm_err(ERR_AILLADDRESS);
return 0;
}
if (rv) {
if (rv->seg)
if (nosegreg || rv->mode != am_dreg)
if (rv->mode != am_direct && rv->mode != am_indisp && rv->mode != am_indispscale && rv->mode != am_seg) {
asm_err(ERR_ATOOMANYSEGS);
return 0;
}
if (!rv->length)
if (sz)
rv->length = sz;
else if (lastsym)
rv->length = lastsym->tp->size;
if (rv->length < 0)
rv->length = - rv->length;
rv->seg = seg;
}
return rv;
}
static AMODE *asm_immed(void)
{
AMODE *rv;
switch(lastst) {
case iconst:
case iuconst:
case lconst:
case luconst:
case cconst:
rv = make_immed(ival);
rv->length = 4;
getsym();
return rv;
}
return 0;
}
int isrm(AMODE* ap, int dreg_allowed)
{
switch (ap->mode) {
case am_dreg:
return dreg_allowed;
case am_indisp:
case am_direct:
case am_indispscale:
return 1;
default:
return 0;
}
}
AMODE *getimmed(void)
{
AMODE *rv;
switch(lastst) {
case iconst:
case iuconst:
case lconst:
case luconst:
case cconst:
rv = make_immed(ival);
getsym();
return rv;
default:
return 0;
}
}
enum e_op asm_op(void)
{
int op;
if (lastst != kw_asminst) {
asm_err(ERR_AINVOP);
return -1;
}
op = keyimage->atype;
getsym();
floating = op >= op_f2xm1;
return op;
}
static OCODE *make_ocode(AMODE *ap1, AMODE *ap2, AMODE *ap3)
{
OCODE *o = xalloc(sizeof(OCODE));
o->oper1 = ap1;
o->oper2 = ap2;
o->oper3 = ap3;
return o;
}
static OCODE *ope_math (void)
{
AMODE *ap1,*ap2;
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
if (!isrm(ap1,TRUE))
return (OCODE *)-1;
needpunc(comma,0);
ap2 = asm_amode(TRUE);
if (!ap2)
return 0;
if (ap1->mode != am_dreg) {
if (ap2->mode != am_immed && ap2->mode != am_dreg)
return (OCODE *)-1;
}
else
if (!isrm(ap2,TRUE) && ap2->mode != am_immed)
return (OCODE *)-1;
if (ap2->mode != am_immed)
if (ap1->length && ap2->length && ap1->length != ap2->length)
return (OCODE *) -2;
return make_ocode(ap1,ap2,0);
}
static OCODE *ope_arpl (void)
{
AMODE *ap1,*ap2;
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
if (!isrm(ap1,TRUE))
return (OCODE *)-1;
needpunc(comma,0);
ap2 = asm_amode(TRUE);
if (!ap2)
return 0;
if (ap2->mode != am_dreg)
return (OCODE *)-1;
if (!ap1->length || !ap2->length || ap1->length != ap2->length || ap1->length != 2)
return (OCODE *) -2;
return make_ocode(ap1,ap2,0);
}
static OCODE *ope_bound (void)
{
AMODE *ap1,*ap2;
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
if (ap1->mode != am_dreg)
return (OCODE *)-1;
needpunc(comma,0);
ap2 = asm_amode(TRUE);
if (!ap2)
return 0;
if (!isrm(ap2,FALSE))
return (OCODE *)-1;
switch(ap1->length) {
case 1:
return (OCODE *)-1;
case 2:
if (ap2->length != 4) {
return (OCODE *) -2;
}
break;
case 4:
if (ap2->length != 8) {
return (OCODE *) -2;
}
break;
}
return make_ocode(ap1,ap2,0);
}
static OCODE *ope_bitscan (void)
{
AMODE *ap1,*ap2;
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
if (ap1->mode != am_dreg)
return (OCODE *)-1;
needpunc(comma,0);
ap2 = asm_amode(TRUE);
if (!ap2)
return 0;
if (!isrm(ap2,TRUE))
return (OCODE *)-1;
if (ap1->length == 1 || ap2->length != ap1->length)
return (OCODE *) -2;
return make_ocode(ap1,ap2,0);
}
static OCODE *ope_bit (void)
{
AMODE *ap1,*ap2;
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
if (!isrm(ap1,TRUE))
return (OCODE *)-1;
needpunc(comma,0);
ap2 = asm_amode(TRUE);
if (!ap2)
return 0;
if (ap2->mode != am_immed && ap2->mode != am_dreg)
return (OCODE *)-1;
if (ap1->length == 1 || ap2->mode == am_dreg && ap2->length == 1)
return (OCODE *) -2;
return make_ocode(ap1,ap2,0);
}
static OCODE *ope_call (void)
{
AMODE *ap1=asm_amode(TRUE);
if (!ap1)
return 0;
if (ap1->mode == am_immed) {
if (ap1->offset->nodetype != en_nalabcon && ap1->offset->nodetype != en_labcon
&& ap1->offset->nodetype != en_napccon || ap1->seg)
return (OCODE *)-1;
}
else {
if (!isrm(ap1,TRUE))
return (OCODE *)-1;
if ((ap1->length != 4) && (ap1->length != 6))
return (OCODE *) -2;
}
return make_ocode(ap1,0,0);
}
static OCODE *ope_incdec (void)
{
AMODE *ap1=asm_amode(TRUE);
if (!ap1)
return 0;
if (!isrm(ap1,TRUE))
return (OCODE *)-1;
if (ap1->length >4) {
return (OCODE *) -2;
}
return make_ocode(ap1,0,0);
}
static OCODE *ope_rm (void)
{
return(ope_incdec());
}
static OCODE *ope_enter (void)
{
AMODE *ap1, *ap2;
ap1 = asm_immed();
if (!ap1)
return 0;
needpunc(comma,0);
ap2 = asm_immed();
if (!ap2)
return 0;
return make_ocode(ap1,ap2,0);
}
static OCODE *ope_imul (void)
{
AMODE *ap1 = asm_amode(TRUE),*ap2=0,*ap3=0;
if (!ap1)
return 0;
if (!isrm(ap1,TRUE))
return (OCODE *)-1;
if (lastst == comma) {
getsym();
ap2 = asm_amode(TRUE);
if (lastst == comma) {
getsym();
ap3 = asm_amode(TRUE);
}
}
if (ap2) {
if (ap1->mode != am_dreg || ap1->length == 1)
return (OCODE *)-1;
if (!isrm(ap2,TRUE) && ap2->mode != am_immed)
return (OCODE *)-1;
if (ap3)
if (ap2->mode == am_immed || ap3->mode != am_immed)
return (OCODE *)-1;
}
return make_ocode(ap1,ap2,ap3);
}
static OCODE *ope_in (void)
{
AMODE *ap1 = asm_amode(TRUE),*ap2;
if (!ap1)
return 0;
if (ap1-> mode != am_dreg || ap1->preg != 0)
return (OCODE *)-1;
needpunc(comma,0);
ap2 = asm_amode(TRUE);
if (!ap2)
return 0;
if (ap2->mode != am_immed &&( ap2->mode != am_dreg || ap2->preg != 2 || ap2->length !=2))
return (OCODE *)-1;
return make_ocode(ap1,ap2,0);
}
static OCODE *ope_imm8 (void)
{
AMODE *ap1 = asm_immed();
if (!ap1)
return 0;
return make_ocode(ap1,0,0);
}
static OCODE *ope_relbra (void)
{
AMODE *ap1=asm_amode(TRUE);
if (!ap1)
return 0;
if (ap1->mode != am_immed)
return (OCODE *)-1;
if (ap1->offset->nodetype != en_nalabcon && ap1->offset->nodetype != en_labcon)
return (OCODE *)-1;
return make_ocode(ap1,0,0);
}
static OCODE *ope_relbr8 (void)
{
return ope_relbra();
}
static OCODE *ope_jmp (void)
{
return ope_call();
}
static OCODE *ope_regrm (void)
{
AMODE *ap1,*ap2;
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
if (ap1->mode != am_dreg)
return (OCODE *)-1;
needpunc(comma,0);
ap2 = asm_amode(TRUE);
if (!ap2)
return 0;
if (!isrm(ap2,TRUE))
return (OCODE *)-1;
if (op == op_lea && ap2->mode == am_dreg)
return (OCODE *)-1;
if (ap2->length && ap1->length != ap2->length || ap1->length == 1)
return (OCODE *)-2;
return make_ocode(ap1,ap2,0);
}
static OCODE *ope_loadseg (void)
{
AMODE *ap1,*ap2;
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
if (ap1->mode != am_dreg)
return (OCODE *)-1;
needpunc(comma,0);
ap2 = asm_amode(TRUE);
if (!ap2)
return 0;
if (!isrm(ap2,TRUE))
return (OCODE *)-1;
if (ap1->length != 4 || ap2->length != 6)
return (OCODE *)-1;
return make_ocode(ap1,ap2,0);
}
static OCODE *ope_lgdt (void)
{
AMODE *ap1,*ap2;
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
if (!isrm(ap1,FALSE) || ap1->length != 6)
return (OCODE *)-1;
return make_ocode(ap1,0,0);
}
static OCODE *ope_lidt (void)
{
return ope_lgdt();
}
static OCODE *ope_rm16 (void)
{
AMODE *ap1,*ap2;
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
if (!isrm(ap1,TRUE) || ap1->length != 2)
return (OCODE *)-1;
return make_ocode(ap1,0,0);
}
static OCODE *ope_mov (void)
{
AMODE *ap1 = asm_amode(TRUE),*ap2;
if (!ap1)
return 0;
if (!isrm(ap1,TRUE) && ap1->mode != am_seg && ap1->mode != am_screg && ap1->mode != am_sdreg && ap1->mode != am_streg)
return (OCODE *)-1;
needpunc(comma,0);
ap2 = asm_amode(TRUE);
if (!ap2)
return 0;
if (ap1->mode == am_dreg) {
if (!isrm(ap2,TRUE) && ap2->mode != am_immed && (ap2->length != 4 || (ap2->mode != am_screg && ap2->mode != am_sdreg && ap2->mode != am_streg)))
return (OCODE *)-1;
}
else if (isrm(ap1,TRUE)) {
if (ap2->mode != am_dreg && ap2->mode != am_immed && ap2->mode != am_seg)
return (OCODE *)-1;
}
else if (ap1->mode == am_seg) {
if (!isrm(ap2,TRUE))
return (OCODE *)-1;
}
else if (ap2->length != 4 || ap2->mode != am_dreg)
return (OCODE *)-1;
if (ap1->length && ap2->length && ap1->length != ap2->length)
return (OCODE *) -2;
return make_ocode(ap1,ap2,0);
}
static OCODE *ope_movsx (void)
{
AMODE *ap1,*ap2;
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
if (ap1->mode != am_dreg)
return (OCODE *)-1;
needpunc(comma,0);
ap2 = asm_amode(TRUE);
if (!ap2)
return 0;
if (!isrm(ap2,TRUE))
return (OCODE *)-1;
if (!ap2->length || ap1->length <= ap2->length) {
asm_err(ERR_AINVSIZE);
}
return make_ocode(ap1,ap2,0);
}
static OCODE *ope_out (void)
{
AMODE *ap1 = asm_amode(TRUE),*ap2;
if (!ap1)
return 0;
if (ap1->mode != am_immed &&( ap1->mode != am_dreg || ap1->preg != 2 || ap1->length !=2))
return (OCODE *)-1;
needpunc(comma,0);
ap2 = asm_amode(TRUE);
if (!ap2)
return 0;
if (ap2-> mode != am_dreg || ap2->preg != 0)
return (OCODE *)-1;
return make_ocode(ap1,ap2,0);
}
static OCODE *ope_pushpop (void)
{
AMODE *ap1;
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
if (!isrm(ap1,TRUE) && ap1->mode != am_seg && ap1->mode != am_immed || (ap1->mode == am_immed && op == op_pop))
return (OCODE *)-1;
if (ap1->mode != am_immed && ap1->length !=2 && ap1->length != 4 ) {
return (OCODE *) -2;
}
if (op == op_pop && ap1->mode == am_seg && ap1->seg == 1)
return (OCODE *) -1;
return make_ocode (ap1,0,0);
}
static OCODE *ope_shift (void)
{
AMODE *ap1,*ap2;
ap1 = asm_amode(2);
if (!ap1)
return 0;
if (!isrm(ap1,TRUE))
return (OCODE *)-1;
needpunc(comma,0);
ap2 = asm_amode(TRUE);
if (!ap2)
return 0;
if (ap2->mode != am_immed && ap2->mode != am_dreg)
return (OCODE *)-1;
if (ap2->mode == am_dreg)
if (ap2->preg != 1 || ap2->length != 1)
return (OCODE *)-1;
return make_ocode(ap1,ap2,0);
}
static OCODE *ope_ret (void)
{
AMODE *ap1 ;
if (lastst != iconst)
return make_ocode(0,0,0);
ap1 = asm_amode(TRUE);
return make_ocode(ap1,0,0);
}
static OCODE *ope_set (void)
{
AMODE *ap1;
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
if (!isrm(ap1,TRUE) || ap1 ->length != 1)
return (OCODE *)-1;
return make_ocode(ap1,0,0);
}
static OCODE *ope_shld (void)
{
AMODE *ap1,*ap2,*ap3;
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
if (!isrm(ap1,TRUE))
return (OCODE *)-1;
needpunc(comma,0);
ap2 = asm_amode(TRUE);
if (!ap2)
return 0;
if (ap2->mode != am_dreg || ap2->length == 1)
return (OCODE *)-1;
if (ap1->length != ap2->length) {
asm_err(ERR_AINVSIZE);
}
needpunc(comma,0);
ap3 = asm_amode(TRUE);
if (!ap3)
return 0;
if (ap3->mode != am_immed && ap3->mode != am_dreg)
return (OCODE *)-1;
if (ap3->mode == am_dreg)
if (ap3->preg != 1 || ap3->length != 1)
return (OCODE *)-1;
return make_ocode(ap1,ap2,ap3);
}
static OCODE *ope_test (void)
{
AMODE *ap1,*ap2;
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
if (!isrm(ap1,TRUE))
return (OCODE *)-1;
needpunc(comma,0);
ap2 = asm_amode(TRUE);
if (!ap2)
return 0;
if (ap2->mode != am_dreg && ap2->mode != am_immed)
return (OCODE *)-1;
if (ap2->mode == am_dreg && ap1->length != ap2->length) {
return (OCODE *) -2;
}
return make_ocode(ap1,ap2,0);
}
static OCODE *ope_xchg (void)
{
AMODE *ap1, *ap2;
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
if (!isrm(ap1,TRUE))
return (OCODE *)-1;
needpunc(comma,0);
ap2 = asm_amode(TRUE);
if (!ap2)
return 0;
if (ap1->mode == am_dreg) {
if (!isrm(ap2,TRUE))
return (OCODE *)-1;
}
else
if (ap2->mode != am_dreg)
return (OCODE *)-1;
if (ap1->length != ap2->length)
return (OCODE *)-2;
return make_ocode(ap1,ap2,0);
}
static OCODE *ope_fmath (void)
{
AMODE *ap1, *ap2=0;
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
if (isrm(ap1,FALSE)) {
if (ap1->length != 6 && ap1->length != 8)
return (OCODE *) -2;
}
else {
if (ap1->mode != am_freg)
return (OCODE *)-1;
needpunc(comma,0);
ap2 = asm_amode(TRUE);
if (ap2->mode != am_freg)
return (OCODE *)-1;
if (ap1->preg && ap2->preg)
return (OCODE *)-1;
}
return make_ocode(ap1,ap2,0);
}
static OCODE *ope_fmathp (void)
{
AMODE *ap1, *ap2;
if (lastst != kw_asmreg)
return make_ocode(0,0,0);
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
if (ap1->mode != am_freg)
return (OCODE *)-1;
needpunc(comma,0);
ap2 = asm_amode(TRUE);
if (!ap2)
return 0;
if (ap2->mode != am_freg)
return (OCODE *)-1;
if (ap1->preg && ap2->preg)
return (OCODE *)-1;
return make_ocode(ap1,ap2,0);
}
static OCODE *ope_fmathi (void)
{
AMODE *ap1;
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
if (isrm(ap1,FALSE)) {
if (ap1->length != 6 && ap1->length != 2)
return (OCODE *) -2;
}
else {
return (OCODE *)-1;
}
return make_ocode(ap1,0,0);
}
static OCODE *ope_fcom (void)
{
AMODE *ap1;
if (lastst != kw_asmreg && lastst != openbr)
return make_ocode(0,0,0);
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
if (isrm(ap1,FALSE)) {
if (ap1->length != 6 && ap1->length != 8)
return (OCODE *) -2;
}
else {
if (ap1->mode != am_freg)
return (OCODE *)-1;
}
return make_ocode(ap1,0,0);
}
static OCODE *ope_freg (void)
{
AMODE *ap1;
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
if (ap1->mode != am_freg)
return (OCODE *)-1;
return make_ocode(ap1,0,0);
}
static OCODE *ope_ficom (void)
{
AMODE *ap1,*ap2;
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
if (!isrm(ap1,FALSE))
return (OCODE *)-1;
if (ap1->length != 2 && ap1->length != 6)
return (OCODE *)-2;
return make_ocode(ap1,0,0);
}
static OCODE *ope_fild (void)
{
AMODE *ap1;
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
if (! isrm(ap1,FALSE))
return (OCODE *)-1;
if (ap1->length != 2 && ap1->length != 6 && ap1->length != 8)
return (OCODE *) -2;
return make_ocode(ap1,0,0);
}
static OCODE *ope_fist (void)
{
AMODE *ap1;
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
if (! isrm(ap1,FALSE))
return (OCODE *)-1;
if (ap1->length != 2 && ap1->length != 6)
return (OCODE *) -2;
return make_ocode(ap1,0,0);
}
static OCODE *ope_fld (void)
{
AMODE *ap1;
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
if (isrm(ap1,FALSE)) {
if (ap1->length != 6 && ap1->length != 8 && ap1->length != 10)
return (OCODE *) -2;
}
else if (ap1->mode != am_freg)
return (OCODE *)-1;
return make_ocode(ap1,0,0);
}
static OCODE *ope_fst (void)
{
AMODE *ap1;
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
if (isrm(ap1,FALSE)) {
if (ap1->length != 6 && ap1->length != 8)
return (OCODE *) -2;
}
else if (ap1->mode != am_freg || ap1->preg == 0)
return (OCODE *)-1;
return make_ocode(ap1,0,0);
}
static OCODE *ope_fstp (void)
{
AMODE *ap1;
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
if (isrm(ap1,FALSE)) {
if (ap1->length != 6 && ap1->length != 8 && ap1->length != 10)
return (OCODE *) -2;
}
else if (ap1->mode != am_freg || ap1->preg == 0)
return (OCODE *)-1;
return make_ocode(ap1,0,0);
}
static OCODE *ope_fucom (void)
{
AMODE *ap1;
if (lastst != kw_asmreg)
return make_ocode(0,0,0);
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
if (ap1->mode != am_freg || ap1->preg == 0)
return (OCODE *)-1;
return make_ocode(ap1,0,0);
}
static OCODE *ope_fxch (void)
{
return ope_fucom();
}
static OCODE *ope_mn (void)
{
AMODE *ap1;
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
if (!isrm(ap1,FALSE))
return (OCODE *)-1;
ap1->length = 10;
return make_ocode(ap1,0,0);
}
static OCODE *ope_m16 (void)
{
AMODE *ap1;
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
if (!isrm(ap1,TRUE))
return (OCODE *)-1;
if (ap1->mode == am_dreg)
if (op != op_fstsw && op != op_fnstsw && op != op_fldsw && ap1->preg != 0)
return (OCODE *)-1;
if (ap1->length != 2)
return (OCODE *) -2;
return make_ocode(ap1,0,0);
}
static OCODE *ope_cmps(void)
{
AMODE *ap1,*ap2;
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
needpunc(comma,0);
ap2 = asm_amode(TRUE);
if (!ap2)
return 0;
if (ap1->mode != am_indisp || ap2->mode != am_indisp)
return (OCODE *)-1;
if (ap1->preg != 6 || ap2->preg != 7)
return (OCODE *)-1;
if (ap1->offset || ap2->offset)
return (OCODE *)-1;
if (!ap1->seg || ap2->seg != 3)
return (OCODE *)-1;
if (!ap1->length && !ap2->length)
return (OCODE *)-2;
return make_ocode(ap1,ap2,0);
}
static OCODE *ope_ins(void)
{
AMODE *ap1,*ap2;
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
needpunc(comma,0);
ap2 = asm_amode(TRUE);
if (!ap2)
return 0;
if (ap1->mode != am_indisp || ap2->mode != am_dreg)
return (OCODE *)-1;
if (ap1->offset)
return (OCODE *)-1;
if (ap1->preg != 7 || ap2->preg != 2)
return (OCODE *)-1;
if (ap2->seg || ap1->seg != 3)
return (OCODE *)-1;
if (ap2->length != 2 || !ap1->length)
return (OCODE *)-2;
return make_ocode(ap1,ap2,0);
}
static OCODE *ope_lods(void)
{
AMODE *ap1,*ap2;
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
if (ap1->mode != am_indisp || ap1->offset)
return (OCODE *)-1;
if (ap1->preg != 6)
return (OCODE *)-1;
if (!ap1->length)
return (OCODE *)-2;
return make_ocode(ap1,0,0);
}
static OCODE *ope_movs(void)
{
AMODE *ap1,*ap2;
ap2 = asm_amode(TRUE);
if (!ap2)
return 0;
needpunc(comma,0);
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
if (ap1->mode != am_indisp || ap2->mode != am_indisp)
return (OCODE *)-1;
if (ap1->preg != 6 || ap2->preg != 7)
return (OCODE *)-1;
if (ap1->offset || ap2->offset)
return (OCODE *)-1;
if (!ap1->seg || ap2->seg != 3)
return (OCODE *)-1;
if (!ap1->length && !ap2->length)
return (OCODE *)-2;
return make_ocode(ap2,ap1,0);
}
static OCODE *ope_outs(void)
{
AMODE *ap1,*ap2;
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
needpunc(comma,0);
ap2 = asm_amode(TRUE);
if (!ap2)
return 0;
if (ap2->mode != am_indisp || ap1->mode != am_dreg || ap2->offset)
return (OCODE *)-1;
if (ap2->preg != 6 || ap1->preg != 2)
return (OCODE *)-1;
if (ap1->seg || ap2->seg != 2)
return (OCODE *)-1;
if (ap1->length != 2 || !ap2->length)
return (OCODE *)-2;
return make_ocode(ap1,ap2,0);
}
static OCODE *ope_scas(void)
{
AMODE *ap1,*ap2;
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
if (ap1->mode != am_indisp || ap1->offset)
return (OCODE *)-1;
if (ap1->preg != 7)
return (OCODE *)-1;
if (ap1->seg != 3)
return (OCODE *)-1;
if (!ap1->length)
return (OCODE *)-2;
return make_ocode(ap1,0,0);
}
static OCODE *ope_xlat(void)
{
AMODE *ap1,*ap2;
ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
if (ap1->mode != am_indisp || ap1->offset)
return (OCODE *)-1;
if (ap1->preg != 3)
return (OCODE *)-1;
if (ap1->length && ap1->length != 1)
return (OCODE *)-2;
ap1->length = 1;
return make_ocode(ap1,0,0);
}
static OCODE *ope_reg32(void)
{
AMODE *ap1 = asm_amode(TRUE);
if (!ap1)
return 0;
if (ap1->mode != am_dreg)
return (OCODE *)-1;
if (ap1->length != 4)
return (OCODE *)-2;
return make_ocode(ap1,0,0);
}
static OCODE *ope_stos(void)
{
return ope_scas();
}
OCODE *(*funcs[])(void) = {
0, ope_math,ope_arpl,ope_bound ,ope_bitscan ,ope_bit ,ope_call ,ope_incdec,
ope_rm ,ope_enter ,ope_imul ,ope_in ,ope_imm8 ,ope_relbra ,ope_relbr8,
ope_jmp ,ope_regrm ,ope_loadseg ,ope_lgdt ,ope_lidt ,ope_rm16 ,ope_mov ,
ope_movsx ,ope_out ,ope_pushpop ,ope_shift ,ope_ret ,ope_set ,ope_shld ,
ope_test ,ope_xchg ,ope_fmath ,ope_fmathp ,ope_fmathi ,ope_fcom ,ope_freg ,
ope_ficom ,ope_fild ,ope_fist ,ope_fld ,ope_fst ,ope_fstp ,ope_fucom ,
ope_fxch ,ope_mn, ope_m16, ope_cmps, ope_ins, ope_lods, ope_movs,
ope_outs, ope_scas, ope_stos, ope_xlat, ope_reg32 };
SNODE *asm_statement (int shortfin)
{
SNODE *snp=0, **snpp = &snp;
OCODE *rv;
ENODE *node;
ASMNAME *ki;
int iserr = 0;
lastsym = 0;
do {
(*snpp) = xalloc(sizeof(SNODE));
(*snpp)->stype = st_asm;
(*snpp)->label = 0;
(*snpp)->exp = 0;
(*snpp)->next = 0;
if (lastst != kw_asminst) {
if (lastst == kw_int) {
getsym();
op = op_int;
rv = ope_imm8();
goto join;
}
node = asm_label();
if (!node)
return (*snpp);
asmline = shortfin;
if (lastst==semicolon)
getsym();
(*snpp)->stype = st_label;
(*snpp)->label = (SNODE *)node->v.i;
return (*snpp);
}
ki = keyimage;
op = asm_op();
if (op == -1)
return (*snpp);
if (keyimage->amode == 0) {
rv = xalloc(sizeof(OCODE));
rv->oper1=rv->oper2=rv->oper3 = 0;
}
else {
rv = (*funcs[ki->amode])();
join:
if (!rv || rv == (OCODE *)-1 || rv == (OCODE *)-2) {
if (rv == (OCODE *)-1 )
asm_err(ERR_AILLADDRESS);
if (rv == (OCODE *)-2 )
asm_err(ERR_AINVSIZE);
iserr=1;
return (snp);
}
}
if (rv->oper1 && rv->oper2) {
if (!rv->oper1->length)
if (!rv->oper2->length) {
asm_err(ERR_AINVSIZE);
iserr=1;
}
else
rv->oper1->length = rv->oper2->length;
else
if (!rv->oper2->length)
rv->oper2->length = rv->oper1->length;
}
rv->noopt = TRUE;
rv->opcode = op;
rv->fwd = rv->back = 0;
(*snpp)->exp = rv;
snpp = &(*snpp)->next;
} while (op == op_rep || op == op_repnz || op == op_repz || op == op_repe || op == op_repne || op == op_lock);
asmline = shortfin;
if (!iserr)
needpunc(semicolon,0);
else if (lastst == semicolon)
getsym();
return (snp);
}