#include "defs"

extern ftnint intcon[14];
extern double realcon[6];

union
	{
	int ijunk;
	struct Intrpacked bits;
	} packed;

struct Intrbits
	{
	int intrgroup /* :3 */;
	int intrstuff /* result type or number of generics */;
	int intrno /* :7 */;
	};

LOCAL struct Intrblock
	{
	char intrfname[VL];
	struct Intrbits intrval;
	} intrtab[ ] =
{
"int", 		{ INTRCONV, TYLONG },
"real", 	{ INTRCONV, TYREAL },
"dble", 	{ INTRCONV, TYDREAL },
"cmplx", 	{ INTRCONV, TYCOMPLEX },
"dcmplx", 	{ INTRCONV, TYDCOMPLEX },
"ifix", 	{ INTRCONV, TYLONG },
"idint", 	{ INTRCONV, TYLONG },
"float", 	{ INTRCONV, TYREAL },
"dfloat",	{ INTRCONV, TYDREAL },
"sngl", 	{ INTRCONV, TYREAL },
"ichar", 	{ INTRCONV, TYLONG },
"char", 	{ INTRCONV, TYCHAR },

"max", 		{ INTRMAX, TYUNKNOWN },
"max0", 	{ INTRMAX, TYLONG },
"amax0", 	{ INTRMAX, TYREAL },
"max1", 	{ INTRMAX, TYLONG },
"amax1", 	{ INTRMAX, TYREAL },
"dmax1", 	{ INTRMAX, TYDREAL },

"and",		{ INTRBOOL, TYUNKNOWN, OPBITAND },
"or",		{ INTRBOOL, TYUNKNOWN, OPBITOR },
"xor",		{ INTRBOOL, TYUNKNOWN, OPBITXOR },
"not",		{ INTRBOOL, TYUNKNOWN, OPBITNOT },
"lshift",	{ INTRBOOL, TYUNKNOWN, OPLSHIFT },
"rshift",	{ INTRBOOL, TYUNKNOWN, OPRSHIFT },

"min", 		{ INTRMIN, TYUNKNOWN },
"min0", 	{ INTRMIN, TYLONG },
"amin0", 	{ INTRMIN, TYREAL },
"min1", 	{ INTRMIN, TYLONG },
"amin1", 	{ INTRMIN, TYREAL },
"dmin1", 	{ INTRMIN, TYDREAL },

"aint", 	{ INTRGEN, 2, 0 },
"dint", 	{ INTRSPEC, TYDREAL, 1 },

"anint", 	{ INTRGEN, 2, 2 },
"dnint", 	{ INTRSPEC, TYDREAL, 3 },

"nint", 	{ INTRGEN, 4, 4 },
"idnint", 	{ INTRGEN, 2, 6 },

"abs", 		{ INTRGEN, 6, 8 },
"iabs", 	{ INTRGEN, 2, 9 },
"dabs", 	{ INTRSPEC, TYDREAL, 11 },
"cabs", 	{ INTRSPEC, TYREAL, 12 },
"zabs", 	{ INTRSPEC, TYDREAL, 13 },

"mod", 		{ INTRGEN, 4, 14 },
"amod", 	{ INTRSPEC, TYREAL, 16 },
"dmod", 	{ INTRSPEC, TYDREAL, 17 },

"sign", 	{ INTRGEN, 4, 18 },
"isign", 	{ INTRGEN, 2, 19 },
"dsign", 	{ INTRSPEC, TYDREAL, 21 },

"dim", 		{ INTRGEN, 4, 22 },
"idim", 	{ INTRGEN, 2, 23 },
"ddim", 	{ INTRSPEC, TYDREAL, 25 },

"dprod", 	{ INTRSPEC, TYDREAL, 26 },

"len", 		{ INTRSPEC, TYLONG, 27 },
"index", 	{ INTRSPEC, TYLONG, 29 },

"imag", 	{ INTRGEN, 2, 31 },
"aimag", 	{ INTRSPEC, TYREAL, 31 },
"dimag", 	{ INTRSPEC, TYDREAL, 32 },

"conjg", 	{ INTRGEN, 2, 33 },
"dconjg", 	{ INTRSPEC, TYDCOMPLEX, 34 },

"sqrt", 	{ INTRGEN, 4, 35 },
"dsqrt", 	{ INTRSPEC, TYDREAL, 36 },
"csqrt", 	{ INTRSPEC, TYCOMPLEX, 37 },
"zsqrt", 	{ INTRSPEC, TYDCOMPLEX, 38 },

"exp", 		{ INTRGEN, 4, 39 },
"dexp", 	{ INTRSPEC, TYDREAL, 40 },
"cexp", 	{ INTRSPEC, TYCOMPLEX, 41 },
"zexp", 	{ INTRSPEC, TYDCOMPLEX, 42 },

"log", 		{ INTRGEN, 4, 43 },
"alog", 	{ INTRSPEC, TYREAL, 43 },
"dlog", 	{ INTRSPEC, TYDREAL, 44 },
"clog", 	{ INTRSPEC, TYCOMPLEX, 45 },
"zlog", 	{ INTRSPEC, TYDCOMPLEX, 46 },

"log10", 	{ INTRGEN, 2, 47 },
"alog10", 	{ INTRSPEC, TYREAL, 47 },
"dlog10", 	{ INTRSPEC, TYDREAL, 48 },

"sin", 		{ INTRGEN, 4, 49 },
"dsin", 	{ INTRSPEC, TYDREAL, 50 },
"csin", 	{ INTRSPEC, TYCOMPLEX, 51 },
"zsin", 	{ INTRSPEC, TYDCOMPLEX, 52 },

"cos", 		{ INTRGEN, 4, 53 },
"dcos", 	{ INTRSPEC, TYDREAL, 54 },
"ccos", 	{ INTRSPEC, TYCOMPLEX, 55 },
"zcos", 	{ INTRSPEC, TYDCOMPLEX, 56 },

"tan", 		{ INTRGEN, 2, 57 },
"dtan", 	{ INTRSPEC, TYDREAL, 58 },

"asin", 	{ INTRGEN, 2, 59 },
"dasin", 	{ INTRSPEC, TYDREAL, 60 },

"acos", 	{ INTRGEN, 2, 61 },
"dacos", 	{ INTRSPEC, TYDREAL, 62 },

"atan", 	{ INTRGEN, 2, 63 },
"datan", 	{ INTRSPEC, TYDREAL, 64 },

"atan2", 	{ INTRGEN, 2, 65 },
"datan2", 	{ INTRSPEC, TYDREAL, 66 },

"sinh", 	{ INTRGEN, 2, 67 },
"dsinh", 	{ INTRSPEC, TYDREAL, 68 },

"cosh", 	{ INTRGEN, 2, 69 },
"dcosh", 	{ INTRSPEC, TYDREAL, 70 },

"tanh", 	{ INTRGEN, 2, 71 },
"dtanh", 	{ INTRSPEC, TYDREAL, 72 },

"lge",		{ INTRSPEC, TYLOGICAL, 73},
"lgt",		{ INTRSPEC, TYLOGICAL, 75},
"lle",		{ INTRSPEC, TYLOGICAL, 77},
"llt",		{ INTRSPEC, TYLOGICAL, 79},

"epbase",	{ INTRCNST, 4, 0 },
"epprec",	{ INTRCNST, 4, 4 },
"epemin",	{ INTRCNST, 2, 8 },
"epemax",	{ INTRCNST, 2, 10 },
"eptiny",	{ INTRCNST, 2, 12 },
"ephuge",	{ INTRCNST, 4, 14 },
"epmrsp",	{ INTRCNST, 2, 18 },

"fpexpn",	{ INTRGEN, 4, 81 },
"fpabsp",	{ INTRGEN, 2, 85 },
"fprrsp",	{ INTRGEN, 2, 87 },
"fpfrac",	{ INTRGEN, 2, 89 },
"fpmake",	{ INTRGEN, 2, 91 },
"fpscal",	{ INTRGEN, 2, 93 },

"" };


LOCAL struct Specblock
	{
	char atype;
	char rtype;
	char nargs;
	char spxname[XL];
	char othername;	/* index into callbyvalue table */
	} spectab[ ] =
{
	{ TYREAL,TYREAL,1,"r_int" },
	{ TYDREAL,TYDREAL,1,"d_int" },

	{ TYREAL,TYREAL,1,"r_nint" },
	{ TYDREAL,TYDREAL,1,"d_nint" },

	{ TYREAL,TYSHORT,1,"h_nint" },
	{ TYREAL,TYLONG,1,"i_nint" },

	{ TYDREAL,TYSHORT,1,"h_dnnt" },
	{ TYDREAL,TYLONG,1,"i_dnnt" },

	{ TYREAL,TYREAL,1,"r_abs" },
	{ TYSHORT,TYSHORT,1,"h_abs" },
	{ TYLONG,TYLONG,1,"i_abs" },
	{ TYDREAL,TYDREAL,1,"d_abs" },
	{ TYCOMPLEX,TYREAL,1,"c_abs" },
	{ TYDCOMPLEX,TYDREAL,1,"z_abs" },

	{ TYSHORT,TYSHORT,2,"h_mod" },
	{ TYLONG,TYLONG,2,"i_mod" },
	{ TYREAL,TYREAL,2,"r_mod" },
	{ TYDREAL,TYDREAL,2,"d_mod" },

	{ TYREAL,TYREAL,2,"r_sign" },
	{ TYSHORT,TYSHORT,2,"h_sign" },
	{ TYLONG,TYLONG,2,"i_sign" },
	{ TYDREAL,TYDREAL,2,"d_sign" },

	{ TYREAL,TYREAL,2,"r_dim" },
	{ TYSHORT,TYSHORT,2,"h_dim" },
	{ TYLONG,TYLONG,2,"i_dim" },
	{ TYDREAL,TYDREAL,2,"d_dim" },

	{ TYREAL,TYDREAL,2,"d_prod" },

	{ TYCHAR,TYSHORT,1,"h_len" },
	{ TYCHAR,TYLONG,1,"i_len" },

	{ TYCHAR,TYSHORT,2,"h_indx" },
	{ TYCHAR,TYLONG,2,"i_indx" },

	{ TYCOMPLEX,TYREAL,1,"r_imag" },
	{ TYDCOMPLEX,TYDREAL,1,"d_imag" },
	{ TYCOMPLEX,TYCOMPLEX,1,"r_cnjg" },
	{ TYDCOMPLEX,TYDCOMPLEX,1,"d_cnjg" },

	{ TYREAL,TYREAL,1,"r_sqrt", 1 },
	{ TYDREAL,TYDREAL,1,"d_sqrt", 1 },
	{ TYCOMPLEX,TYCOMPLEX,1,"c_sqrt" },
	{ TYDCOMPLEX,TYDCOMPLEX,1,"z_sqrt" },

	{ TYREAL,TYREAL,1,"r_exp", 2 },
	{ TYDREAL,TYDREAL,1,"d_exp", 2 },
	{ TYCOMPLEX,TYCOMPLEX,1,"c_exp" },
	{ TYDCOMPLEX,TYDCOMPLEX,1,"z_exp" },

	{ TYREAL,TYREAL,1,"r_log", 3 },
	{ TYDREAL,TYDREAL,1,"d_log", 3 },
	{ TYCOMPLEX,TYCOMPLEX,1,"c_log" },
	{ TYDCOMPLEX,TYDCOMPLEX,1,"z_log" },

	{ TYREAL,TYREAL,1,"r_lg10" },
	{ TYDREAL,TYDREAL,1,"d_lg10" },

	{ TYREAL,TYREAL,1,"r_sin", 4 },
	{ TYDREAL,TYDREAL,1,"d_sin", 4 },
	{ TYCOMPLEX,TYCOMPLEX,1,"c_sin" },
	{ TYDCOMPLEX,TYDCOMPLEX,1,"z_sin" },

	{ TYREAL,TYREAL,1,"r_cos", 5 },
	{ TYDREAL,TYDREAL,1,"d_cos", 5 },
	{ TYCOMPLEX,TYCOMPLEX,1,"c_cos" },
	{ TYDCOMPLEX,TYDCOMPLEX,1,"z_cos" },

	{ TYREAL,TYREAL,1,"r_tan", 6 },
	{ TYDREAL,TYDREAL,1,"d_tan", 6 },

	{ TYREAL,TYREAL,1,"r_asin", 7 },
	{ TYDREAL,TYDREAL,1,"d_asin", 7 },

	{ TYREAL,TYREAL,1,"r_acos", 8 },
	{ TYDREAL,TYDREAL,1,"d_acos", 8 },

	{ TYREAL,TYREAL,1,"r_atan", 9 },
	{ TYDREAL,TYDREAL,1,"d_atan", 9 },

	{ TYREAL,TYREAL,2,"r_atn2", 10 },
	{ TYDREAL,TYDREAL,2,"d_atn2", 10 },

	{ TYREAL,TYREAL,1,"r_sinh", 11 },
	{ TYDREAL,TYDREAL,1,"d_sinh", 11 },

	{ TYREAL,TYREAL,1,"r_cosh", 12 },
	{ TYDREAL,TYDREAL,1,"d_cosh", 12 },

	{ TYREAL,TYREAL,1,"r_tanh", 13 },
	{ TYDREAL,TYDREAL,1,"d_tanh", 13 },

	{ TYCHAR,TYLOGICAL,2,"hl_ge" },
	{ TYCHAR,TYLOGICAL,2,"l_ge" },

	{ TYCHAR,TYLOGICAL,2,"hl_gt" },
	{ TYCHAR,TYLOGICAL,2,"l_gt" },

	{ TYCHAR,TYLOGICAL,2,"hl_le" },
	{ TYCHAR,TYLOGICAL,2,"l_le" },

	{ TYCHAR,TYLOGICAL,2,"hl_lt" },
	{ TYCHAR,TYLOGICAL,2,"l_lt" },

	{ TYREAL,TYSHORT,1,"hr_expn" },
	{ TYREAL,TYLONG,1,"ir_expn" },
	{ TYDREAL,TYSHORT,1,"hd_expn" },
	{ TYDREAL,TYLONG,1,"id_expn" },

	{ TYREAL,TYREAL,1,"r_absp" },
	{ TYDREAL,TYDREAL,1,"d_absp" },

	{ TYREAL,TYDREAL,1,"r_rrsp" },
	{ TYDREAL,TYDREAL,1,"d_rrsp" },

	{ TYREAL,TYREAL,1,"r_frac" },
	{ TYDREAL,TYDREAL,1,"d_frac" },

	{ TYREAL,TYREAL,2,"r_make" },
	{ TYDREAL,TYDREAL,2,"d_make" },

	{ TYREAL,TYREAL,2,"r_scal" },
	{ TYDREAL,TYDREAL,2,"d_scal" }
} ;

LOCAL struct Incstblock
	{
	char atype;
	char rtype;
	char constno;
	} consttab[ ] =
{
	{ TYSHORT, TYLONG, 0 },
	{ TYLONG, TYLONG, 1 },
	{ TYREAL, TYLONG, 2 },
	{ TYDREAL, TYLONG, 3 },

	{ TYSHORT, TYLONG, 4 },
	{ TYLONG, TYLONG, 5 },
	{ TYREAL, TYLONG, 6 },
	{ TYDREAL, TYLONG, 7 },

	{ TYREAL, TYLONG, 8 },
	{ TYDREAL, TYLONG, 9 },

	{ TYREAL, TYLONG, 10 },
	{ TYDREAL, TYLONG, 11 },

	{ TYREAL, TYREAL, 0 },
	{ TYDREAL, TYDREAL, 1 },

	{ TYSHORT, TYLONG, 12 },
	{ TYLONG, TYLONG, 13 },
	{ TYREAL, TYREAL, 2 },
	{ TYDREAL, TYDREAL, 3 },

	{ TYREAL, TYREAL, 4 },
	{ TYDREAL, TYDREAL, 5 }
};

/* For each machine, two arrays must be initialized.
intcon contains
	radix for short int
	radix for long int
	radix for single precision
	radix for double precision
	precision for short int
	precision for long int
	precision for single precision
	precision for double precision
	emin for single precision
	emin for double precision
	emax for single precision
	emax for double prcision
	largest short int
	largest long int

realcon contains
	tiny for single precision
	tiny for double precision
	huge for single precision
	huge for double precision
	mrsp (epsilon) for single precision
	mrsp (epsilon) for double precision

the realcons should probably be filled in in binary if TARGET==HERE
*/

char callbyvalue[ ][XL] =
	{
	"sqrt",
	"exp",
	"log",
	"sin",
	"cos",
	"tan",
	"asin",
	"acos",
	"atan",
	"atan2",
	"sinh",
	"cosh",
	"tanh"
	};

struct Exprblock *intrcall(np, argsp, nargs)
struct Nameblock *np;
struct Listblock *argsp;
int nargs;
{
int i, rettype;
struct Addrblock *ap;
register struct Specblock *sp;
struct Exprblock *q, *inline();
register struct Chain *cp;
struct Constblock *mkcxcon(), *mkrealcon();
register struct Incstblock *cstp;
expptr ep;
int mtype;
int op;
int f1field, f2field, f3field;

packed.ijunk = np->vardesc.varno;
f1field = packed.bits.f1;
f2field = packed.bits.f2;
f3field = packed.bits.f3;
if(nargs == 0)
	goto badnargs;

mtype = 0;
for(cp = argsp->listp ; cp ; cp = cp->nextp)
	{
/* TEMPORARY */ ep = cp->datap;
/* TEMPORARY */	if( ISCONST(ep) && ep->headblock.vtype==TYSHORT )
/* TEMPORARY */		cp->datap = mkconv(tyint, ep);
	mtype = maxtype(mtype, ep->headblock.vtype);
	}

switch(f1field)
	{
	case INTRBOOL:
		op = f3field;
		if( ! ONEOF(mtype, MSKINT|MSKLOGICAL) )
			goto badtype;
		if(op == OPBITNOT)
			{
			if(nargs != 1)
				goto badnargs;
			q = mkexpr(OPBITNOT, argsp->listp->datap, NULL);
			}
		else
			{
			if(nargs != 2)
				goto badnargs;
			q = mkexpr(op, argsp->listp->datap,
				argsp->listp->nextp->datap);
			}
		frchain( &(argsp->listp) );
		free(argsp);
		return(q);

	case INTRCONV:
		rettype = f2field;
		if(rettype == TYLONG)
			rettype = tyint;
		if( ISCOMPLEX(rettype) && nargs==2)
			{
			expptr qr, qi;
			qr = argsp->listp->datap;
			qi = argsp->listp->nextp->datap;
			if(ISCONST(qr) && ISCONST(qi))
				q = mkcxcon(qr,qi);
			else	q = mkexpr(OPCONV,mkconv(rettype-2,qr),
					mkconv(rettype-2,qi));
			}
		else if(nargs == 1)
			q = mkconv(rettype, argsp->listp->datap);
		else goto badnargs;

		q->vtype = rettype;
		frchain(&(argsp->listp));
		free(argsp);
		return(q);


	case INTRCNST:
		cstp = consttab + f3field;
		for(i=0 ; i<f2field ; ++i)
			if(cstp->atype == mtype)
				goto foundconst;
			else
				++cstp;
		goto badtype;

	foundconst:
		switch(cstp->rtype)
			{
			case TYLONG:
				return( mkintcon(intcon[cstp->constno]) );

			case TYREAL:
			case TYDREAL:
				return( mkrealcon(cstp->rtype,
					realcon[cstp->constno]) );

			default:
				fatal("impossible intrinsic constant");
			}

	case INTRGEN:
		sp = spectab + f3field;
		if(no66flag)
			if(sp->atype == mtype)
				goto specfunct;
			else err66("generic function");

		for(i=0; i<f2field ; ++i)
			if(sp->atype == mtype)
				goto specfunct;
			else
				++sp;
		goto badtype;

	case INTRSPEC:
		sp = spectab + f3field;
	specfunct:
		if(tyint==TYLONG && sp->rtype==TYSHORT
			&& (sp+1)->atype==sp->atype)
				++sp;

		if(nargs != sp->nargs)
			goto badnargs;
		if(mtype != sp->atype)
			goto badtype;
		fixargs(YES, argsp);
		if(q = inline(sp-spectab, mtype, argsp->listp))
			{
			frchain( &(argsp->listp) );
			free(argsp);
			}
		else if(sp->othername)
			{
			ap = builtin(sp->rtype,
				varstr(XL, callbyvalue[sp->othername-1]) );
			q = fixexpr( mkexpr(OPCCALL, ap, argsp) );
			}
		else
			{
			ap = builtin(sp->rtype, varstr(XL, sp->spxname) );
			q = fixexpr( mkexpr(OPCALL, ap, argsp) );
			}
		return(q);

	case INTRMIN:
	case INTRMAX:
		if(nargs < 2)
			goto badnargs;
		if( ! ONEOF(mtype, MSKINT|MSKREAL) )
			goto badtype;
		argsp->vtype = mtype;
		q = mkexpr( (f1field==INTRMIN ? OPMIN : OPMAX), argsp, NULL);

		q->vtype = mtype;
		rettype = f2field;
		if(rettype == TYLONG)
			rettype = tyint;
		else if(rettype == TYUNKNOWN)
			rettype = mtype;
		return( mkconv(rettype, q) );

	default:
		fatali("intrcall: bad intrgroup %d", f1field);
	}
badnargs:
	errstr("bad number of arguments to intrinsic %s",
		varstr(VL,np->varname) );
	goto bad;

badtype:
	errstr("bad argument type to intrinsic %s", varstr(VL, np->varname) );

bad:
	return( errnode() );
}




intrfunct(s)
char s[VL];
{
register struct Intrblock *p;
char nm[VL];
register int i;

for(i = 0 ; i<VL ; ++s)
	nm[i++] = (*s==' ' ? '\0' : *s);

for(p = intrtab; p->intrval.intrgroup!=INTREND ; ++p)
	{
	if( eqn(VL, nm, p->intrfname) )
		{
		packed.bits.f1 = p->intrval.intrgroup;
		packed.bits.f2 = p->intrval.intrstuff;
		packed.bits.f3 = p->intrval.intrno;
		return(packed.ijunk);
		}
	}

return(0);
}





struct Addrblock *intraddr(np)
struct Nameblock *np;
{
struct Addrblock *q;
register struct Specblock *sp;
int f3field;

if(np->vclass!=CLPROC || np->vprocclass!=PINTRINSIC)
	fatalstr("intraddr: %s is not intrinsic", varstr(VL,np->varname));
packed.ijunk = np->vardesc.varno;
f3field = packed.bits.f3;

switch(packed.bits.f1)
	{
	case INTRGEN:
		/* imag, log, and log10 arent specific functions */
		if(f3field==31 || f3field==43 || f3field==47)
			goto bad;

	case INTRSPEC:
		sp = spectab + f3field;
		if(tyint==TYLONG && sp->rtype==TYSHORT)
			++sp;
		q = builtin(sp->rtype, varstr(XL,sp->spxname) );
		return(q);

	case INTRCONV:
	case INTRMIN:
	case INTRMAX:
	case INTRBOOL:
	case INTRCNST:
	bad:
		errstr("cannot pass %s as actual",
			varstr(VL,np->varname));
		return( errnode() );
	}
fatali("intraddr: impossible f1=%d\n", packed.bits.f1);
/* NOTREACHED */
}





struct Exprblock *inline(fno, type, args)
int fno;
int type;
struct Chain *args;
{
register struct Exprblock *q, *t, *t1;

switch(fno)
	{
	case 8:	/* real abs */
	case 9:	/* short int abs */
	case 10:	/* long int abs */
	case 11:	/* double precision abs */
		if( addressable(q = args->datap) )
			{
			t = q;
			q = NULL;
			}
		else
			t = mktemp(type);
		t1 = mkexpr(OPQUEST,  mkexpr(OPLE, mkconv(type,ICON(0)), cpexpr(t)),
			mkexpr(OPCOLON, cpexpr(t),
				mkexpr(OPNEG, cpexpr(t), NULL) ));
		if(q)
			t1 = mkexpr(OPCOMMA, mkexpr(OPASSIGN, cpexpr(t),q), t1);
		frexpr(t);
		return(t1);

	case 26:	/* dprod */
		q = mkexpr(OPSTAR, mkconv(TYDREAL,args->datap), args->nextp->datap);
		return(q);

	case 27:	/* len of character string */
		q = cpexpr(args->datap->vleng);
		frexpr(args->datap);
		return(q);

	case 14:	/* half-integer mod */
	case 15:	/* mod */
		return( mkexpr(OPMOD, args->datap, args->nextp->datap) );
	}
return(NULL);
}
