Initial revision

mach/i86/ncg/.distr

@@ -0,0 +1,4 @@
+Makefile
+mach.c
+mach.h
+table

mach/i86/ncg/mach.c

@@ -0,0 +1,238 @@
+/*
+ * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
+ * See the copyright notice in the ACK home directory, in the file "Copyright".
+ *
+ */
+
+#ifndef NORCSID
+static char rcs_m[]= "$Header$" ;
+static char rcs_mh[]= ID_MH ;
+#endif
+
+/*
+ * machine dependent back end routines for the Intel 8086
+ */
+
+con_part(sz,w) register sz; word w; {
+
+	while (part_size % sz)
+		part_size++;
+	if (part_size == TEM_WSIZE)
+		part_flush();
+	if (sz == 1) {
+		w &= 0xFF;
+		if (part_size)
+			w <<= 8;
+		part_word |= w;
+	} else {
+		assert(sz == 2);
+		part_word = w;
+	}
+	part_size += sz;
+}
+
+con_mult(sz) word sz; {
+	long l;
+
+	if (sz != 4)
+		fatal("bad icon/ucon size");
+	l = atol(str);
+	fprintf(codefile,"\t.data2 %d,%d\n",
+			(int)l&0xFFFF,(int)(l>>16)&0xFFFF);
+}
+
+#define IEEEFLOAT
+
+con_float() {
+	double f;
+	double atof();
+	float fl;
+	int i;
+#ifndef OWNFLOAT
+	double f1;
+	double frexp(), modf();
+	int j;
+	int sign = 0;
+	int fraction ;
+#else OWNFLOAT
+	char *p;
+#endif OWNFLOAT
+
+	if (argval!= 4 && argval!= 8)	{
+		fprintf(stderr,"float constant size = %d\n",argval);
+		fatal("bad fcon size");
+	}
+	fprintf(codefile,"!float %s sz %d\n", str, argval);
+	f = atof(str);
+#ifdef OWNFLOAT
+	if (argval == 4) {
+		fl = f;
+		p = (char *) &fl;
+	}
+	else {
+		p = (char *) &f;
+	}
+	fprintf(codefile, ".data1 0%o", *p++ & 0377);
+	for (i = argval-1; i; i--) {
+		fprintf(codefile,",0%o", *p++ & 0377);
+	}
+#else OWNFLOAT
+	f = frexp(f, &i);
+	if (f < 0) {
+		f = -f;
+		sign = 1;
+	}
+	if (f == 0) {
+		if (argval == 8) fprintf(codefile, ".data2 0, 0\n");
+		fprintf(codefile, ".data2 0, 0\n");
+		return;
+	}
+	while (f < 0.5) {
+		f += f;
+		i --;
+	}
+	f = modf(2 * f, &f1); /* hidden bit */
+#ifdef IEEEFLOAT
+	if (argval == 4) {
+#endif IEEEFLOAT
+		i = (i + 128) & 0377;
+		fraction = (sign << 15) | (i << 7);
+		for (j = 6; j>= 0; j--) {
+			if (f >= 0.5) fraction |= (1 << j);
+			f = modf(2*f, &f1);
+		}
+#ifdef IEEEFLOAT
+	}
+	else {
+		i = (i + 1024) & 03777;
+		fraction = (sign << 15) | (i << 4);
+		for (j = 3; j>= 0; j--) {
+			if (f >= 0.5) fraction |= (1 << j);
+			f = modf(2*f, &f1);
+		}
+	}
+#endif IEEEFLOAT
+	fprintf(codefile, ".data1 0%o, 0%o", (fraction>>8)&0377, fraction&0377);
+	for (i = argval / 2 - 1; i; i--) {
+		fraction = 0;
+		for (j = 15; j>= 0; j--) {
+			if (f >= 0.5) fraction |= (1 << j);
+			f = modf(2*f, &f1);
+		}
+		fprintf(codefile, ", 0%o, 0%o", (fraction>>8)&0377, fraction&0377);
+	}
+#endif OWNFLOAT
+	putc('\n', codefile);
+}
+
+/*
+
+string holstr(n) word n; {
+
+	sprintf(str,hol_off,n,holno);
+	return(mystrcpy(str));
+}
+*/
+
+prolog(nlocals) full nlocals; {
+
+	fputs("\tpush\tbp\n\tmov\tbp,sp\n", codefile);
+	switch (nlocals) {
+	case 4: fputs("\tpush\tax\n", codefile);
+	case 2: fputs("\tpush\tax\n", codefile);
+	case 0: break;
+	default:
+		fprintf(codefile, "\tsub\tsp,%d\n",nlocals); break;
+	}
+}
+
+#ifdef REGVARS
+long si_off;
+long di_off;
+int firstreg;
+
+regscore(off, size, typ, score, totyp)
+	long off;
+{
+	if (size != 2) return -1;
+	score -= 1;
+	score += score;
+	if (typ == reg_pointer || typ == reg_loop) score += (score >> 2);
+	score -= 2;	/* cost of saving */
+	if (off >= 0) score -= 3;
+	return score;
+}
+
+i_regsave()
+{
+	si_off = -1;
+	di_off = -1;
+	firstreg = 0;
+}
+
+f_regsave()
+{
+}
+
+regsave(regstr, off, size)
+	char *regstr;
+	long off;
+{
+	if (strcmp(regstr, "si") == 0) {
+		if (! firstreg) firstreg = -1;
+		si_off = off;
+		fputs("push si\n", codefile);
+		if (off >= 0)
+			fprintf(codefile, "mov si,%ld(bp)\n", off);
+	}
+	else {
+		if (! firstreg) firstreg = 1;
+		di_off = off;
+		fputs("push di\n", codefile);
+		if (off >= 0)
+			fprintf(codefile, "mov di,%ld(bp)\n", off);
+	}
+}
+
+regreturn()
+{
+	if (firstreg == 1) {
+		if (si_off != -1) fputs("jmp .sdret\n", codefile);
+		else fputs("jmp .dret\n", codefile);
+	}
+	else if (firstreg == -1) {
+		if (di_off != -1) fputs("jmp .dsret\n", codefile);
+		else fputs("jmp .sret\n", codefile);
+	}
+	else fputs("jmp .cret\n", codefile);
+}
+#endif REGVARS
+
+mes(type) word type ; {
+	int argt ;
+
+	switch ( (int)type ) {
+	case ms_ext :
+		for (;;) {
+			switch ( argt=getarg(
+			    ptyp(sp_cend)|ptyp(sp_pnam)|sym_ptyp) ) {
+			case sp_cend :
+				return ;
+			default:
+				strarg(argt) ;
+				fprintf(codefile, ".define %s\n",argstr) ;
+				break ;
+			}
+		}
+	default :
+		while ( getarg(any_ptyp) != sp_cend ) ;
+		break ;
+	}
+}
+
+char    *segname[] = {
+	".sect .text",        /* SEGTXT */
+	".sect .data",        /* SEGCON */
+	".sect .rom",        /* SEGROM */
+	".sect .bss"          /* SEGBSS */
+};

mach/i86/ncg/mach.h

@@ -0,0 +1,35 @@
+/*
+ * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
+ * See the copyright notice in the ACK home directory, in the file "Copyright".
+ */
+#ifndef NORCSID
+#define ID_MH		"$Header$"
+#endif
+
+#define ex_ap(y)        fprintf(codefile,".extern %s\n",y)
+#define in_ap(y)        /* nothing */
+
+#define newilb(x)       fprintf(codefile,"%s:\n",x)
+#define newdlb(x)       fprintf(codefile,"%s:\n",x)
+#define dlbdlb(x,y)     fprintf(codefile,"%s = %s\n",x,y)
+#define newlbss(l,x)    fprintf(codefile,"%s: .space\t%d\n",l,x);
+
+#define cst_fmt         "%d"
+#define off_fmt         "%d"
+#define ilb_fmt         "I%x_%x"
+#define dlb_fmt         "_%d"
+#define hol_fmt         "hol%d"
+
+#define loc_off         "%d(bp)"
+#define arg_off         "4+%d(bp)"
+#define hol_off         "%ld+hol%d"
+
+#define con_cst(x)      fprintf(codefile,".data2\t%ld\n",x)
+#define con_ilb(x)      fprintf(codefile,".data2\t%s\n",x)
+#define con_dlb(x)      fprintf(codefile,".data2\t%s\n",x)
+
+#define modhead         ".sect .text; .sect .rom; .sect .data; .sect .bss\n"
+
+#define fmt_id(fr,to)	sprintf(to, "_%s", fr)
+
+#define BSS_INIT        0