From: ceriel <none@none>
Date: Tue, 14 Feb 1989 15:52:25 +0000 (+0000)
Subject: Initial revision
X-Git-Tag: release-5-5~2581
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=01626b2c3229053adb8df6f3e52753723a29ceb9;p=ack.git

Initial revision
---

diff --git a/mach/i386/ncg/.distr b/mach/i386/ncg/.distr
new file mode 100644
index 000000000..10c4617eb
--- /dev/null
+++ b/mach/i386/ncg/.distr
@@ -0,0 +1,4 @@
+Makefile
+mach.c
+mach.h
+table
diff --git a/mach/i386/ncg/mach.c b/mach/i386/ncg/mach.c
new file mode 100644
index 000000000..7779ea682
--- /dev/null
+++ b/mach/i386/ncg/mach.c
@@ -0,0 +1,295 @@
+/*
+ * (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 80386
+ */
+
+con_part(sz,w) register sz; word w; {
+
+	while (part_size % sz)
+		part_size++;
+	if (part_size == TEM_WSIZE)
+		part_flush();
+	if (sz == 1 || sz == 2) {
+		w &= (sz == 1 ? 0xFF : 0xFFFF);
+		w <<= 8 * part_size;
+		part_word |= w;
+	} else {
+		assert(sz == 4);
+		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.data4 %ld\n", l);
+}
+
+#ifdef NOFLOAT
+con_float() {
+
+static int been_here;
+	if (argval != 4 && argval != 8)
+		fatal("bad fcon size");
+	fputs(".data4\t", codefile);
+	if (argval == 8)
+		fputs("0,", codefile);
+	fputs("0 !dummy float\n", codefile);
+	if ( !been_here++)
+	{
+	fputs("Warning : dummy float-constant(s)\n", stderr);
+	}
+}
+#else
+#define IEEEFLOAT
+
+con_float() {
+	double f;
+	double atof();
+	int i;
+	int j;
+	double frexp();
+#ifndef OWNFLOAT
+	int sign = 0;
+	int fraction[4] ;
+#else OWNFLOAT
+	float fl;
+	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);
+	if (f == 0) {
+		if (argval == 8) fprintf(codefile, ".data4 0\n");
+		fprintf(codefile, ".data4 0\n");
+		return;
+	}
+#ifdef OWNFLOAT
+	if (argval == 4) {
+		/* careful: avoid overflow */
+		double ldexp();
+		f = frexp(f, &i);
+		fl = f;
+		fl = frexp(fl,&j);
+		if (i+j > 127) {
+			/* overflow situation */
+			fprintf(codefile, ".data1 0%o, 0377, 0377, 0377 ! overflow\n",
+				f < 0 ? 0377 : 0177);
+			return;
+		}
+		if (i+j < -127) {
+			/* underflow situation */
+			fprintf(codefile, ".data1 0%o, 0200, 0, 0 ! underflow\n",
+				f < 0 ? 0200 : 0);
+			return;
+		}
+		fl = ldexp(fl, i+j);
+		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;
+	}
+	while (f < 0.5) {
+		f += f;
+		i --;
+	}
+	f = 2*f - 1.0;		/* hidden bit */
+#ifdef IEEEFLOAT
+	if (argval == 4) {
+#endif IEEEFLOAT
+		i = (i + 128) & 0377;
+		fraction[0] = (sign << 15) | (i << 7);
+		for (j = 6; j>= 0; j--) {
+			f *= 2;
+			if (f >= 1.0) {
+				f -= 1.0;
+				fraction[0] |= (1 << j);
+			}
+		}
+#ifdef IEEEFLOAT
+	}
+	else {
+		i = (i + 1024) & 03777;
+		fraction[0] = (sign << 15) | (i << 4);
+		for (j = 3; j>= 0; j--) {
+			f *= 2;
+			if (f >= 1.0) {
+				fraction[0] |= (1 << j);
+				f -= 1.0;
+			}
+		}
+	}
+#endif IEEEFLOAT
+	for (i = 1; i < argval / 2; i++) {
+		fraction[i] = 0;
+		for (j = 15; j>= 0; j--) {
+			f *= 2;
+			if (f >= 1.0) {
+				fraction[i] |= (1 << j);
+				f -= 1.0;
+			}
+		}
+	}
+	if (f >= 0.5) {
+		for (i = argval/2 - 1; i >= 0; i--) {
+			for (j = 0; j < 16; j++) {
+				if (fraction[i] & (1 << j)) {
+					fraction[i] &= ~(1 << j);
+				}
+				else {
+					fraction[i] |= (1 << j);
+					break;
+				}
+			}
+			if (j != 16) break;
+		}
+	}
+	for (i = 0; i < argval/2; i++) {
+		fprintf(codefile,
+			i != 0 ? ", 0%o, 0%o" : ".data1 0%o, 0%o", 
+			(fraction[i]>>8)&0377,
+			fraction[i]&0377);
+	}
+#endif OWNFLOAT
+	putc('\n', codefile);
+}
+#endif
+
+/*
+
+string holstr(n) word n; {
+
+	sprintf(str,hol_off,n,holno);
+	return(mystrcpy(str));
+}
+*/
+
+prolog(nlocals) full nlocals; {
+
+	if (nlocals < 32767) {
+		fprintf(codefile, "\tenter %ld,0\n", nlocals);
+	}
+	else {
+		fputs("\tenter 0,0\n", codefile);
+		fprintf(codefile, "\tsub\tesp,%ld\n",nlocals);
+	}
+}
+
+#ifdef REGVARS
+long si_off;
+long di_off;
+int firstreg;
+
+regscore(off, size, typ, score, totyp)
+	long off;
+{
+	if (size != 4) 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, "esi") == 0) {
+		if (! firstreg) firstreg = -1;
+		si_off = off;
+		fputs("push esi\n", codefile);
+		if (off >= 0)
+			fprintf(codefile, "mov esi,%ld(ebp)\n", off);
+	}
+	else {
+		if (! firstreg) firstreg = 1;
+		di_off = off;
+		fputs("push edi\n", codefile);
+		if (off >= 0)
+			fprintf(codefile, "mov edi,%ld(ebp)\n", off);
+	}
+}
+
+regreturn()
+{
+	if (firstreg == 1) {
+		if (si_off != -1) fputs("pop esi\n", codefile);
+		fputs("pop edi\n", codefile);
+	}
+	else if (firstreg == -1) {
+		if (di_off != -1) fputs("pop edi\n", codefile);
+		fputs("pop esi\n", codefile);
+	}
+	fputs("leave\nret\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 */
+};
diff --git a/mach/i386/ncg/mach.h b/mach/i386/ncg/mach.h
new file mode 100644
index 000000000..c750c59fd
--- /dev/null
+++ b/mach/i386/ncg/mach.h
@@ -0,0 +1,33 @@
+/*
+ * (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%ld\n",l,x);
+
+#define cst_fmt         "%ld"
+#define off_fmt         "%ld"
+#define ilb_fmt         "I%x_%x"
+#define dlb_fmt         "I_%d"
+#define hol_fmt         "hol%d"
+
+#define hol_off         "%ld+hol%d"
+
+#define con_cst(x)      fprintf(codefile,".data4\t%ld\n",x)
+#define con_ilb(x)      fprintf(codefile,".data4\t%s\n",x)
+#define con_dlb(x)      fprintf(codefile,".data4\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