Merged in millerresearch/inferno-riscv/utils-riscv (pull request #8)

Add toolchain and libmach support for riscv and riscv64

Approved-by: Charles Forsyth <charles.forsyth@gmail.com>

10 files changed, 5052 insertions, 0 deletions

diff --git a/utils/il/asm.c b/utils/il/asm.c
new file mode 100644
index 00000000..b0b1ce8f
--- /dev/null
+++ b/utils/il/asm.c
@@ -0,0 +1,966 @@
+#include	"l.h"
+
+long	OFFSET;
+
+xlong
+entryvalue(void)
+{
+	char *a;
+	Sym *s;
+
+	a = INITENTRY;
+	if(*a >= '0' && *a <= '9')
+		return atolwhex(a);
+	s = lookup(a, 0);
+	if(s->type == 0)
+		return INITTEXT;
+	if(s->type != STEXT && s->type != SLEAF)
+		diag("entry not text: %s", s->name);
+	return s->value + INITTEXT;
+}
+
+void
+asmb(void)
+{
+	Prog *p;
+	long t, etext;
+	Optab *o;
+
+	if(debug['v'])
+		Bprint(&bso, "%5.2f asm\n", cputime());
+	Bflush(&bso);
+	OFFSET = HEADR;
+	seek(cout, OFFSET, 0);
+	pc = 0;
+	for(p = firstp; p != P; p = p->link) {
+		if(p->as == ATEXT) {
+			/* align on word boundary */
+			if(!debug['c'] && (pc & 2) != 0){
+				nopalign.pc = pc;
+				pc += asmout(&nopalign, oplook(&nopalign), 0);
+			}
+			curtext = p;
+			autosize = p->to.offset + ptrsize;
+		}
+		if(p->pc != pc) {
+			diag("phase error %lux sb %lux",
+				p->pc, pc);
+			if(!debug['a'])
+				prasm(curp);
+			pc = p->pc;
+		}
+		curp = p;
+		o = oplook(p);	/* could probably avoid this call */
+		pc += asmout(p, o, 0);
+	}
+	if(debug['a'])
+		Bprint(&bso, "\n");
+	Bflush(&bso);
+	cflush();
+
+	etext = textsize;
+	for(t = pc; t < etext; t += sizeof(buf)-100) {
+		if(etext-t > sizeof(buf)-100)
+			datblk(t, sizeof(buf)-100, 1);
+		else
+			datblk(t, etext-t, 1);
+	}
+
+	Bflush(&bso);
+	cflush();
+
+	curtext = P;
+	switch(HEADTYPE) {
+	case 0:
+	case 4:
+		OFFSET = rnd(HEADR+textsize, 4096);
+		seek(cout, OFFSET, 0);
+		break;
+	case 1:
+	case 2:
+	case 3:
+	case 5:
+	case 6:
+		OFFSET = HEADR+textsize;
+		seek(cout, OFFSET, 0);
+		break;
+	}
+	for(t = 0; t < datsize; t += sizeof(buf)-100) {
+		if(datsize-t > sizeof(buf)-100)
+			datblk(t, sizeof(buf)-100, 0);
+		else
+			datblk(t, datsize-t, 0);
+	}
+
+	symsize = 0;
+	lcsize = 0;
+	if(!debug['s']) {
+		if(debug['v'])
+			Bprint(&bso, "%5.2f sym\n", cputime());
+		Bflush(&bso);
+		switch(HEADTYPE) {
+		case 0:
+		case 4:
+			OFFSET = rnd(HEADR+textsize, 4096)+datsize;
+			seek(cout, OFFSET, 0);
+			break;
+		case 3:
+		case 2:
+		case 1:
+		case 5:
+		case 6:
+			OFFSET = HEADR+textsize+datsize;
+			seek(cout, OFFSET, 0);
+			break;
+		}
+		if(!debug['s'])
+			asmsym();
+		if(debug['v'])
+			Bprint(&bso, "%5.2f pc\n", cputime());
+		Bflush(&bso);
+		if(!debug['s'])
+			asmlc();
+		cflush();
+	}
+
+	if(debug['v'])
+		Bprint(&bso, "%5.2f header\n", cputime());
+	Bflush(&bso);
+	OFFSET = 0;
+	seek(cout, OFFSET, 0);
+	switch(HEADTYPE) {
+	case 1:
+		break;
+	case 2:
+		/* XXX expanded header needed? */
+		t = thechar == 'j' ? 30 : 29;
+		lput(((((4*t)+0)*t)+7));	/* magic */
+		lput(textsize);			/* sizes */
+		lput(datsize);
+		lput(bsssize);
+		lput(symsize);			/* nsyms */
+		lput(entryvalue());		/* va of entry */
+		lput(0L);
+		lput(lcsize);
+		break;
+	case 5:
+		if(thechar == 'j')
+			elf64(243, ELFDATA2LSB, 0, nil);		/* 243 is RISCV */
+		else
+			elf32(243, ELFDATA2LSB, 0, nil);
+	}
+	cflush();
+}
+
+void
+strnput(char *s, int n)
+{
+	for(; *s; s++){
+		cput(*s);
+		n--;
+	}
+	for(; n > 0; n--)
+		cput(0);
+}
+
+void
+cput(int c)
+{
+	cbp[0] = c;
+	cbp++;
+	cbc--;
+	if(cbc <= 0)
+		cflush();
+}
+
+void
+wput(long l)
+{
+
+	cbp[0] = l>>8;
+	cbp[1] = l;
+	cbp += 2;
+	cbc -= 2;
+	if(cbc <= 0)
+		cflush();
+}
+
+void
+wputl(long l)
+{
+
+	cbp[0] = l;
+	cbp[1] = l>>8;
+	cbp += 2;
+	cbc -= 2;
+	if(cbc <= 0)
+		cflush();
+}
+
+void
+lput(long l)
+{
+
+	cbp[0] = l>>24;
+	cbp[1] = l>>16;
+	cbp[2] = l>>8;
+	cbp[3] = l;
+	cbp += 4;
+	cbc -= 4;
+	if(cbc <= 0)
+		cflush();
+}
+
+void
+lputl(long l)
+{
+
+	cbp[3] = l>>24;
+	cbp[2] = l>>16;
+	cbp[1] = l>>8;
+	cbp[0] = l;
+	cbp += 4;
+	cbc -= 4;
+	if(cbc <= 0)
+		cflush();
+}
+
+void
+llput(vlong v)
+{
+	lput(v>>32);
+	lput(v);
+}
+
+void
+llputl(vlong v)
+{
+	lputl(v);
+	lputl(v>>32);
+}
+
+void
+cflush(void)
+{
+	int n;
+
+	n = sizeof(buf.cbuf) - cbc;
+	if(n)
+		write(cout, buf.cbuf, n);
+	cbp = buf.cbuf;
+	cbc = sizeof(buf.cbuf);
+}
+
+void
+nopstat(char *f, Count *c)
+{
+	if(c->outof)
+	Bprint(&bso, "%s delay %ld/%ld (%.2f)\n", f,
+		c->outof - c->count, c->outof,
+		(double)(c->outof - c->count)/c->outof);
+}
+
+void
+asmsym(void)
+{
+	Prog *p;
+	Auto *a;
+	Sym *s;
+	int h;
+
+	s = lookup("etext", 0);
+	if(s->type == STEXT)
+		putsymb(s->name, 'T', s->value+INITTEXT, s->version);
+
+	for(h=0; h<NHASH; h++)
+		for(s=hash[h]; s!=S; s=s->link)
+			switch(s->type) {
+			case SCONST:
+				putsymb(s->name, 'D', s->value, s->version);
+				continue;
+
+			case SSTRING:
+				putsymb(s->name, 'T', s->value, s->version);
+				continue;
+
+			case SDATA:
+				putsymb(s->name, 'D', s->value+INITDAT, s->version);
+				continue;
+
+			case SBSS:
+				putsymb(s->name, 'B', s->value+INITDAT, s->version);
+				continue;
+
+			case SFILE:
+				putsymb(s->name, 'f', s->value, s->version);
+				continue;
+			}
+
+	for(p=textp; p!=P; p=p->cond) {
+		s = p->from.sym;
+		if(s->type != STEXT && s->type != SLEAF)
+			continue;
+
+		/* filenames first */
+		for(a=p->to.autom; a; a=a->link)
+			if(a->type == D_FILE)
+				putsymb(a->asym->name, 'z', a->aoffset, 0);
+			else
+			if(a->type == D_FILE1)
+				putsymb(a->asym->name, 'Z', a->aoffset, 0);
+
+		if(s->type == STEXT)
+			putsymb(s->name, 'T', s->value+INITTEXT, s->version);
+		else
+			putsymb(s->name, 'L', s->value+INITTEXT, s->version);
+
+		/* frame, auto and param after */
+		putsymb(".frame", 'm', p->to.offset+ptrsize, 0);
+		for(a=p->to.autom; a; a=a->link)
+			if(a->type == D_AUTO)
+				putsymb(a->asym->name, 'a', -a->aoffset, 0);
+			else
+			if(a->type == D_PARAM)
+				putsymb(a->asym->name, 'p', a->aoffset, 0);
+	}
+	if(debug['v'] || debug['n'])
+		Bprint(&bso, "symsize = %lud\n", symsize);
+	Bflush(&bso);
+}
+
+void
+putsymb(char *s, int t, vlong v, int ver)
+{
+	int i, f, l;
+
+	if(t == 'f')
+		s++;
+	if(thechar == 'j'){
+		l = 8;
+		llput(v);
+	}else{
+		l = 4;
+		lput(v);
+	}
+	if(ver)
+		t += 'a' - 'A';
+	cput(t+0x80);			/* 0x80 is variable length */
+
+	if(t == 'Z' || t == 'z') {
+		cput(s[0]);
+		for(i=1; s[i] != 0 || s[i+1] != 0; i += 2) {
+			cput(s[i]);
+			cput(s[i+1]);
+		}
+		cput(0);
+		cput(0);
+		i++;
+	}
+	else {
+		for(i=0; s[i]; i++)
+			cput(s[i]);
+		cput(0);
+	}
+	symsize += l + 1 + i + 1;
+
+	if(debug['n']) {
+		if(t == 'z' || t == 'Z') {
+			Bprint(&bso, "%c %.8llux ", t, v);
+			for(i=1; s[i] != 0 || s[i+1] != 0; i+=2) {
+				f = ((s[i]&0xff) << 8) | (s[i+1]&0xff);
+				Bprint(&bso, "/%x", f);
+			}
+			Bprint(&bso, "\n");
+			return;
+		}
+		if(ver)
+			Bprint(&bso, "%c %.8llux %s<%d>\n", t, v, s, ver);
+		else
+			Bprint(&bso, "%c %.8llux %s\n", t, v, s);
+	}
+}
+
+#define	MINLC	4
+void
+asmlc(void)
+{
+	long oldpc, oldlc;
+	Prog *p;
+	long v, s;
+
+	oldpc = 0;
+	oldlc = 0;
+	for(p = firstp; p != P; p = p->link) {
+		if(p->line == oldlc || p->as == ATEXT || p->as == ANOP) {
+			if(p->as == ATEXT)
+				curtext = p;
+			if(debug['L'])
+				Bprint(&bso, "%6lux %P\n",
+					p->pc, p);
+			continue;
+		}
+		if(debug['L'])
+			Bprint(&bso, "\t\t%6ld", lcsize);
+		v = (p->pc - oldpc) / MINLC;
+		while(v) {
+			s = 127;
+			if(v < 127)
+				s = v;
+			cput(s+128);	/* 129-255 +pc */
+			if(debug['L'])
+				Bprint(&bso, " pc+%ld*%d(%ld)", s, MINLC, s+128);
+			v -= s;
+			lcsize++;
+		}
+		s = p->line - oldlc;
+		oldlc = p->line;
+		oldpc = p->pc + MINLC;
+		if(s > 64 || s < -64) {
+			cput(0);	/* 0 vv +lc */
+			cput(s>>24);
+			cput(s>>16);
+			cput(s>>8);
+			cput(s);
+			if(debug['L']) {
+				if(s > 0)
+					Bprint(&bso, " lc+%ld(%d,%ld)\n",
+						s, 0, s);
+				else
+					Bprint(&bso, " lc%ld(%d,%ld)\n",
+						s, 0, s);
+				Bprint(&bso, "%6lux %P\n",
+					p->pc, p);
+			}
+			lcsize += 5;
+			continue;
+		}
+		if(s > 0) {
+			cput(0+s);	/* 1-64 +lc */
+			if(debug['L']) {
+				Bprint(&bso, " lc+%ld(%ld)\n", s, 0+s);
+				Bprint(&bso, "%6lux %P\n",
+					p->pc, p);
+			}
+		} else {
+			cput(64-s);	/* 65-128 -lc */
+			if(debug['L']) {
+				Bprint(&bso, " lc%ld(%ld)\n", s, 64-s);
+				Bprint(&bso, "%6lux %P\n",
+					p->pc, p);
+			}
+		}
+		lcsize++;
+	}
+	while(lcsize & 1) {
+		s = 129;
+		cput(s);
+		lcsize++;
+	}
+	if(debug['v'] || debug['L'])
+		Bprint(&bso, "lcsize = %ld\n", lcsize);
+	Bflush(&bso);
+}
+
+void
+datblk(long s, long n, int str)
+{
+	Prog *p;
+	char *cast;
+	vlong d;
+	long l, fl, j;
+	int i, c;
+
+	memset(buf.dbuf, 0, n+100);
+	for(p = datap; p != P; p = p->link) {
+		curp = p;
+		if(str != (p->from.sym->type == SSTRING))
+			continue;
+		l = p->from.sym->value + p->from.offset - s;
+		c = p->reg;
+		i = 0;
+		if(l < 0) {
+			if(l+c <= 0)
+				continue;
+			while(l < 0) {
+				l++;
+				i++;
+			}
+		}
+		if(l >= n)
+			continue;
+		if(p->as != AINIT && p->as != ADYNT) {
+			for(j=l+(c-i)-1; j>=l; j--)
+				if(buf.dbuf[j]) {
+					print("%P\n", p);
+					diag("multiple initialization");
+					break;
+				}
+		}
+		switch(p->to.type) {
+		default:
+			diag("unknown mode in initialization\n%P", p);
+			break;
+
+		case D_FCONST:
+			switch(c) {
+			default:
+			case 4:
+				fl = ieeedtof(p->to.ieee);
+				cast = (char*)&fl;
+				for(; i<c; i++) {
+					buf.dbuf[l] = cast[fnuxi8[i+4]];
+					l++;
+				}
+				break;
+			case 8:
+				cast = (char*)p->to.ieee;
+				for(; i<c; i++) {
+					buf.dbuf[l] = cast[fnuxi8[i]];
+					l++;
+				}
+				break;
+			}
+			break;
+
+		case D_SCONST:
+			for(; i<c; i++) {
+				buf.dbuf[l] = p->to.sval[i];
+				l++;
+			}
+			break;
+
+		case D_VCONST:
+			d = *p->to.vval;
+			goto dconst;
+
+		case D_CONST:
+			d = p->to.offset;
+		dconst:
+			if(p->to.sym) {
+				switch(p->to.sym->type) {
+				case STEXT:
+				case SLEAF:
+				case SSTRING:
+					d += (p->to.sym->value + INITTEXT);
+					break;
+				case SDATA:
+				case SBSS:
+					d += (p->to.sym->value + INITDAT);
+					break;
+				}
+			}
+			cast = (char*)&d;
+			switch(c) {
+			default:
+				diag("bad nuxi %d %d\n%P", c, i, curp);
+				break;
+			case 1:
+				for(; i<c; i++) {
+					buf.dbuf[l] = cast[inuxi1[i]];
+					l++;
+				}
+				break;
+			case 2:
+				for(; i<c; i++) {
+					buf.dbuf[l] = cast[inuxi2[i]];
+					l++;
+				}
+				break;
+			case 4:
+				for(; i<c; i++) {
+					buf.dbuf[l] = cast[inuxi4[i]];
+					l++;
+				}
+				break;
+			case 8:
+				for(; i<c; i++) {
+					buf.dbuf[l] = cast[inuxi8[i]];
+					l++;
+				}
+				break;
+			}
+			break;
+		}
+		if(debug['d'] && i == c) {
+			Bprint(&bso, "%.8llux", l+s+INITDAT-c);
+			for(j = -c; j<0; j++)
+				Bprint(&bso, " %.2ux", ((uchar*)buf.dbuf)[l + j]);
+			Bprint(&bso, "\t%P\n", curp);
+		}
+	}
+	write(cout, buf.dbuf, n);
+}
+
+#define R(r) ((r)&0x1F)
+#define OPX	(0x3 | o->op<<2)
+#define OPF (OPX | o->func3<<12)
+#define OP_R(rs1,rs2,rd)\
+	(OPF | rd<<7 | R(rs1)<<15 | R(rs2)<<20 | o->param<<25)
+#define OP_RF(rs1,rs2,rd,rm)\
+	(OPX | rm<<12 | rd<<7 | R(rs1)<<15 | R(rs2)<<20 | o->param<<25)
+#define OP_RO(rs1,rs2,rd)\
+	(0x3 | OOP<<2 | o->func3<<12 | rd<<7 | R(rs1)<<15 | R(rs2)<<20)
+#define OP_ADD(rs1,rs2,rd)\
+	(0x3 | OOP<<2 | rd<<7 | R(rs1)<<15 | R(rs2)<<20)
+#define OP_I(rs1,rd,imm)\
+	(OPF | rd<<7 | R(rs1)<<15 | (imm)<<20)
+#define OP_FI(func3,rs1,rd,imm)\
+	(OPX | func3<<12 | rd<<7 | R(rs1)<<15 | (imm)<<20)
+#define OP_S(rs1,rs2,imm)\
+	(OPF | (imm&0x1F)<<7 | R(rs1)<<15 | R(rs2)<<20 | (imm>>5)<<25)
+#define OP_B(rs1,rs2,imm)\
+	(OPF | R(rs1)<<15 | R(rs2)<<20 | (imm&0x800)>>4 | (imm&0x1E)<<7 | \
+	 (imm&0x7E0)<<20 | (imm&0x1000)<<19)
+#define OP_U(rd,imm)\
+	(0x3 | OLUI<<2 | rd<<7 | (imm&0xFFFFF000))
+#define OP_UP(rd,imm)\
+	(0x3 | OAUIPC<<2 | rd<<7 | (imm&0xFFFFF000))
+#define OP_J(rd,imm)\
+	(OPX | rd<<7 | (imm&0xff000) | (imm&0x800)<<9 | (imm&0x7FE)<<20 | (imm&0x100000)<<11)
+
+/*
+ * aflag: 0 - assemble to object file
+ *        1 - return assembled instruction
+ *        2 - first pass, return length of assembled instruction
+ *        3 - later pass, return length of assembled instruction
+ */
+int
+asmout(Prog *p, Optab *o, int aflag)
+{
+	vlong vv;
+	long o1, o2, o3, v;
+	int r;
+
+	o1 = 0;
+	o2 = 0;
+	o3 = 0;
+	r = p->reg;
+	if(r == NREG) switch(p->as){
+		case AMOVF:
+		case AMOVD:
+			if(p->from.type == D_FREG && p->to.type == D_FREG)
+				r = p->from.reg;
+			break;
+		case AMOV:
+		case AJMP:
+			r = REGZERO;
+			break;
+		case AJAL:
+			r = REGLINK;
+			break;
+		default:
+			r = p->to.reg;
+			break;
+	}
+	if(!debug['c'] && o->ctype){
+		o1 = asmcompressed(p, o, r, aflag == 2);
+		if(o1 != 0){
+			switch(aflag){
+			case 1:
+				return o1;
+			case 2:
+			case 3:
+				return 2;
+			}
+			if(debug['a']){
+				v = p->pc + INITTEXT;
+				Bprint(&bso, " %.8lux: %.4lux    \t%P\n", v, o1, p);
+			}
+			wputl(o1);
+			return 2;
+		}
+	}
+	if(aflag >= 2)
+		return o->size;
+	switch(o->type) {
+	default:
+		diag("unknown type %d", o->type);
+		if(!debug['a'])
+			prasm(p);
+		break;
+
+	case 0:		/* add S,[R,]D */
+		o1 = OP_R(r, p->from.reg, p->to.reg);
+		break;
+
+	case 1:		/* slli $I,[R,]D */
+		v = p->from.offset & 0x3F;
+		v |= (o->param<<5);
+		o1 = OP_I(r, p->to.reg, v);
+		break;
+
+	case 2:		/* addi $I,[R,]D */
+		v = p->from.offset;
+		if(v < -BIG || v >= BIG)
+			diag("imm out of range\n%P", p);
+		o1 = OP_I(r, p->to.reg, v);
+		break;
+	
+	case 3:		/* beq S,[R,]L */
+		if(r == NREG)
+			r = REGZERO;
+		if(p->cond == P)
+			v = 0;
+		else
+			v = (p->cond->pc - pc);
+		if(v < -0x1000 || v >= 0x1000)
+			diag("branch out of range\n%P", p);
+		o1 = OP_B(r, p->from.reg, v);
+		break;
+
+	case 4:		/* jal	[D,]L */
+		if(p->cond == P)
+			v = 0;
+		else
+			v = (p->cond->pc - pc);
+		if(v < -0x100000 || v >= 0x100000)
+			diag("jump out of range\n%P", p);
+		o1 = OP_J(r, v);
+		break;
+
+	case 5:		/* jalr [D,]I(S) */
+		v = regoff(&p->to);
+		if(v < -BIG || v >= BIG)
+			diag("imm out of range\n%P", p);
+		o1 = OP_I(classreg(&p->to), r, v);
+		break;
+
+	case 6:		/* sb	R,I(S) */
+		v = regoff(&p->to);
+		r = classreg(&p->to);
+		if(v < -BIG || v >= BIG)
+			diag("imm out of range\n%P", p);
+		o1 = OP_S(r, p->from.reg, v);
+		break;
+
+	case 7:		/* lb	I(S),D */
+		v = regoff(&p->from);
+		r = classreg(&p->from);
+		if(v < -BIG || v >= BIG)
+			diag("imm out of range\n%P", p);
+		o1 = OP_I(r, p->to.reg, v);
+		break;
+
+	case 8:		/* lui	I,D */
+		v = p->from.offset;
+		o1 = OP_U(p->to.reg, v);
+		break;
+
+	case 9:		/* lui	I1,D; addi I0,D */
+		v = regoff(&p->from);
+		if(thechar == 'j' && v >= 0x7ffff800){
+			/* awkward edge case */
+			o1 = OP_U(p->to.reg, -v);
+			v &= 0xFFF;
+			o2 = OP_FI(4, p->to.reg, p->to.reg, v);	/* xori */
+			break;
+		}
+		if(v & 0x800)
+			v += 0x1000;
+		o1 = OP_U(p->to.reg, v);
+		v &= 0xFFF;
+		o2 = OP_I(p->to.reg, p->to.reg, v);
+		break;
+
+	case 10:	/* sign extend */
+		if(p->as == AMOVBU) {
+			o1 = OP_I(p->from.reg, p->to.reg, o->param);
+			break;
+		}
+		v = o->param;
+		if(thechar == 'j')
+			v += 32;
+		o1 = OP_FI(1, p->from.reg, p->to.reg, v & 0x3F);	/* slli */
+		o2 = OP_I(p->to.reg, p->to.reg, v);	/* srli or srai */
+		break;
+
+	case 11:		/* addi $I,R,D */
+		v = regoff(&p->from);
+		if(v < -BIG || v >= BIG)
+			diag("imm out of range\n%P", p);
+		o1 = OP_I(classreg(&p->from), p->to.reg, v);
+		break;
+
+	case 12:		/* mov r,lext => lui/auipc I1,T; sb r,I0(T) */
+		v = regoff(&p->to);
+		if(thechar == 'j'){
+			vv = v + INITDAT + BIG - INITTEXT - pc;
+			v = (long)vv;
+			if(v != vv || (v&~0x7FF) == 0x7FFFF800)
+				diag("address out of range\n%P", p);
+		}else
+			v += INITDAT + BIG;
+		if(v & 0x800)
+			v += 0x1000;
+		o1 = thechar == 'j' ? OP_UP(REGTMP, v) : OP_U(REGTMP, v);
+		v &= 0xFFF;
+		o2 = OP_S(REGTMP, p->from.reg, v);
+		break;
+
+	case 13:		/* mov lext, r => lui/auipc I1,T; lb r,I0(T) */
+		v = regoff(&p->from);
+		if(thechar == 'j'){
+			vv = v + INITDAT + BIG - INITTEXT - pc;
+			v = (long)vv;
+			if(v != vv || (v&~0x7FF) == 0x7FFFF800)
+				diag("address out of range\n%P", p);
+		}else
+				v += INITDAT + BIG;
+		if(v & 0x800)
+			v += 0x1000;
+		o1 = thechar == 'j' ? OP_UP(REGTMP, v) : OP_U(REGTMP, v);
+		v &= 0xFFF;
+		o2 = OP_I(REGTMP, p->to.reg, v);
+		break;
+
+	case 14:		/* op $lcon,[r,]d => lui L1,T; addi $L0,T,T; op T,r,d */
+		v = regoff(&p->from);
+		if(p->as == AMOVW || p->as == AMOV)
+			r = classreg(&p->from);
+		if(thechar == 'j' && v >= 0x7ffff800){
+			/* awkward edge case */
+			o1 = OP_U(p->to.reg, -v);
+			v &= 0xFFF;
+			o2 = OP_FI(4, p->to.reg, p->to.reg, v);	/* xori */
+		}else{
+			if(v & 0x800)
+				v += 0x1000;
+			o1 = OP_U(REGTMP, v);
+			v &= 0xFFF;
+			o2 = OP_FI(0, REGTMP, REGTMP, v);	/* addi */
+		}
+		o3 = OP_RO(r, REGTMP, p->to.reg);
+		break;
+
+	case 15:		/* mov r,L(s) => lui L1,T; add s,T,T; sb r,L0(T) */
+		v = regoff(&p->to);
+		r = classreg(&p->to);
+		if(v & 0x800)
+			v += 0x1000;
+		o1 = OP_U(REGTMP, v);
+		v &= 0xFFF;
+		o2 = OP_ADD(r, REGTMP, REGTMP);
+		o3 = OP_S(REGTMP, p->from.reg, v);
+		break;
+
+	case 16:		/* mov L(s),r => lui L1,T; add s,T,T; lb r,L0(T) */
+		v = regoff(&p->from);
+		r = classreg(&p->from);
+		if(v & 0x800)
+			v += 0x1000;
+		o1 = OP_U(REGTMP, v);
+		v &= 0xFFF;
+		o2 = OP_ADD(r, REGTMP, REGTMP);
+		o3 = OP_I(REGTMP, p->to.reg, v);
+		break;
+
+	case 17:	/* fcvt S,D */
+		v = 7;	/* dynamic rounding mode */
+		if(o->a3 == C_REG)	/* convert to int? */
+			v = 1;	/* round towards zero */
+		o1 = OP_RF(p->from.reg, o->func3, p->to.reg, v);
+		break;
+
+	case 18:	/* lui L1, T; jal [r,]L0(T) */
+		if(p->cond == P)
+			v = 0;
+		else
+			v = p->cond->pc;
+		if(thechar == 'j'){
+			vv = v + INITTEXT;
+			v = (long)vv;
+			if(v != vv || (v&~0x7FF) == 0x7FFFF800)
+				diag("branch out of range\n%P", p);
+		}else
+			v += INITTEXT;
+		if(v & 0x800)
+			v += 0x1000;
+		o1 = thechar == 'j' ? OP_UP(REGTMP, v) : OP_U(REGTMP, v);
+		v &= 0xFFF;
+		o2 = OP_I(REGTMP, r, v);
+		break;
+
+	case 19:	/* addiw $0, rs, rd */
+		v = 0;
+		o1 = OP_I(p->from.reg, p->to.reg, v);
+		break;
+
+	case 20:	/* lui/auipc I1,D; addi I0; D */
+		if(thechar == 'j'){
+			vv = regoff(&p->from) + instoffx - (pc + INITTEXT);
+			v = (long)vv;
+			if(v != vv || (v&~0x7FF) == 0x7FFFF800)
+				diag("address %llux out of range\n%P", regoff(&p->from) + instoffx, p);
+		}else{
+			v = regoff(&p->from) + instoffx;
+		}
+		if(v & 0x800)
+			v += 0x1000;
+		o1 = thechar == 'j' ? OP_UP(p->to.reg, v) : OP_U(p->to.reg, v);
+		v &= 0xFFF;
+		o2 = OP_I(p->to.reg, p->to.reg, v);
+		break;
+
+	case 21:	/* lui I,D; s[lr]ai N,D */
+		vv = *p->from.vval;
+		v = vconshift(vv);
+		if(v < 0)
+			diag("64 bit constant error:\n%P", p);
+		if(v < 12)
+			vv <<= 12 - v;
+		else
+			vv >>= v - 12;
+		o1 = OP_U(p->to.reg, (long)vv);
+		if (v > 12)
+			o2 = OP_FI(1, p->to.reg, p->to.reg, v - 12);	/* slli */
+		else
+			o2 = OP_I(p->to.reg, p->to.reg, 12 - v);	/* srai */
+		break; 
+
+	case 22:	/* CSRRx C, rs, rd */
+		v = p->from.offset & 0xFFF;
+		o1 = OP_I(p->reg, p->to.reg, v);
+		break;
+
+	case 24:		/* SYS */
+		v = p->to.offset & 0xFFF;
+		o1 = OP_I(0, 0, v);
+		break;
+
+	case 25:		/* word $x */
+		o1 = regoff(&p->to);
+		break;
+
+	case 26:		/* pseudo ops */
+		break;
+	}
+	if(aflag)
+		return o1;
+	v = p->pc + INITTEXT;
+	switch(o->size) {
+	default:
+		if(debug['a'])
+			Bprint(&bso, " %.8lux:\t\t%P\n", v, p);
+		break;
+	case 4:
+		if(debug['a'])
+			Bprint(&bso, " %.8lux: %.8lux\t%P\n", v, o1, p);
+		lputl(o1);
+		break;
+	case 8:
+		if(debug['a'])
+			Bprint(&bso, " %.8lux: %.8lux %.8lux%P\n", v, o1, o2, p);
+		lputl(o1);
+		lputl(o2);
+		break;
+	case 12:
+		if(debug['a'])
+			Bprint(&bso, " %.8lux: %.8lux %.8lux %.8lux%P\n", v, o1, o2, o3, p);
+		lputl(o1);
+		lputl(o2);
+		lputl(o3);
+		break;
+	}
+	return o->size;
+}
+
diff --git a/utils/il/compress.c b/utils/il/compress.c
new file mode 100644
index 00000000..e0063615
--- /dev/null
+++ b/utils/il/compress.c
@@ -0,0 +1,270 @@
+#include	"l.h"
+
+#define COMPREG(r) ((r & ~0x7) == 0x8)
+#define COP_CR(op,rs,rd)\
+	(op | (rs)<<2 | (rd)<<7)
+#define COP_CI(op,rd,i)\
+	(op | (rd)<<7 | ((i)&0x20)<<7 | ((i)&0x1F)<<2)
+#define COP_CIW(op,rd,i)\
+	(op | (rd)<<2 | (i)<<5)
+#define COP_CJ(op,i)\
+	(op | (i)<<2)
+#define COP_CB(op,rs,i)\
+	(op | (rs)<<7 | ((i)&0x1f)<<2 | ((i)&0xE0)<<5)
+#define COP_CL(op,rs,rd,i)\
+	(op | (rs)<<7 | (rd)<<2 | ((i)&0x7)<<4 | ((i)&0x38)<<7)
+#define COP_CSS(op,rs,i)\
+	(op | (rs)<<2 | ((i)&0x3F)<<7)
+#define COP_CS(op,rs2,rs1,i)\
+	(op | (rs2)<<2 | (rs1)<<7 | ((i)&0x7)<<4 | ((i)&0x38)<<7)
+
+static int
+immbits(int v, char *permute)
+{
+	int r, i, c;
+
+	r = 0;
+	for(i = 0; (c = *permute++) != 0; i++)
+		r |= ((v>>c) & 0x01) << i;
+	return r;
+}
+
+long
+asmcjmp(int a, Prog *p, int first)
+{
+	long v;
+
+	if(p->cond == P)
+		v = 0;
+	else
+		v = (p->cond->pc - p->pc);
+	if(first || ((v&0x01) == 0 && v >= -0x800 && v < 0x800))
+		return COP_CJ(a, immbits(v, "\5\1\2\3\7\6\12\10\11\4\13"));
+	return 0;
+}
+
+int
+asmcbz(int a, Prog *p, int first)
+{
+	long v;
+	int r;
+
+	r = p->reg;
+	if(r == REGZERO || r == NREG)
+		r = p->from.reg;
+	else if(p->from.reg != REGZERO)
+		return 0;
+	if(!COMPREG(r))
+		return 0;
+	if(p->cond == P)
+		v = 0;
+	else
+		v = (p->cond->pc - p->pc);
+	if(first || ((v&0x01) == 0 && v >= -0x100 && v < 0x100))
+		return COP_CB(a, r&0x7, immbits(v, "\5\1\2\6\7\3\4\10"));
+	return 0;
+}
+
+int
+asmcload(Prog *p, int a, uint len, uint maxoff)
+{
+	int v;
+	int r;
+
+	v = regoff(&p->from);
+	if((v & (len-1)) != 0 || v < 0)
+		return 0;
+	r = classreg(&p->from);
+	if(COMPREG(r) && COMPREG(p->to.reg)){
+		if(v < maxoff){
+			v |= (v>>5) & ~0x1;
+			return COP_CL(a, r&0x7, p->to.reg&0x7, v);
+		}
+	}else if(r == REGSP){
+		if(v < 2*maxoff){
+			v |= (v>>6);
+			return COP_CI(a | 0x2, p->to.reg, v);
+		}
+	}
+	return 0;
+}
+
+int
+asmcstore(Prog *p, int a, uint len, uint maxoff)
+{
+	int v;
+	int r;
+
+	v = regoff(&p->to);
+	if((v & (len-1)) != 0 || v < 0)
+		return 0;
+	r = classreg(&p->to);
+	if(COMPREG(r) && COMPREG(p->from.reg)){
+		if(v < maxoff){
+			v |= (v>>5) & ~0x1;
+			return COP_CS(a, p->from.reg&0x7, r&0x7, v);
+		}
+	}else if(r == REGSP){
+		if(v < 2*maxoff){
+			v |= (v>>6);
+			return COP_CSS(a | 0x2, (p->from.reg&0x1F), v);
+		}
+	}
+	return 0;
+}
+
+int
+asmcompressed(Prog *p, Optab *o, int r, int first)
+{
+	long v;
+	int a;
+
+	switch(o->ctype){
+	case 1: /* C.ADD */
+		if(p->from.reg != REGZERO && p->to.reg != REGZERO && r == p->to.reg)
+			return COP_CR(0x9002, p->from.reg, r);
+		break;
+	case 2:	/* C.MV */
+		if(p->from.type != D_REG)
+			diag("compress MOVW R,R doesn't apply\n%P", p);
+		if(p->to.reg != REGZERO){
+			if(p->from.type == D_REG && p->from.reg != REGZERO)
+				return COP_CR(0x8002, p->from.reg, p->to.reg);
+			else
+				return COP_CI(0x4001, p->to.reg, 0);
+		}
+		break;
+	case 3:	/* C.JALR */
+		if(r == REGLINK && p->to.reg != REGZERO && p->to.offset == 0)
+			return COP_CR(0x9002, 0, p->to.reg);
+		break;
+	case 4:	/* C.JR */
+		if(p->to.reg != REGZERO &&p->to.offset == 0)
+			return COP_CR(0x8002, 0, p->to.reg);
+		break;
+	case 5:	/* C.AND C.OR C.SUB C.XOR */
+		if(r == p->to.reg && COMPREG(p->from.reg) && COMPREG(p->to.reg)){
+			v = 0x8C01;
+			switch(o->as){
+			case AXOR:
+				v |= 1<<5;
+				break;
+			case AOR:
+				v |= 2<<5;
+				break;
+			case AAND:
+				v |= 3<<5;
+				break;
+			}
+			return COP_CR(v, p->from.reg&0x7, p->to.reg&0x7);
+		}
+		break;
+	case 6:	/* C.LI */
+		v = p->from.offset;
+		if(p->to.reg != REGZERO && v >= -0x20 && v < 0x20){
+			return COP_CI(0x4001, p->to.reg, v);
+		}
+		break;
+	case 7: /* C.LUI */
+		v = p->from.offset;
+		if((v&0xFFF) != 0)
+			return 0;
+		v >>= 12;
+		if(p->to.reg != REGZERO && p->to.reg != REGSP && v >= -0x20 && v < 0x20)
+			return COP_CI(0x6001, p->to.reg, v);
+		break;
+	case 8: /* C.SLLI */
+		v = p->from.offset;
+		if((v & 0x20) != 0 && thechar == 'i')
+			break;
+		if(r == p->to.reg && r != REGZERO && v != 0 && (v & ~0x3F) == 0)
+			return COP_CI(0x0002, p->to.reg, v);
+		break;
+	case 9:	/* C.SRAI C.SRLI */
+		v = p->from.offset;
+		if((v & 0x20) != 0 && thechar == 'i')
+			break;
+		a = (o->as == ASRA) << 10;
+		if(r == p->to.reg && COMPREG(r) && v != 0 && (v & ~0x3F) == 0)
+			return COP_CI(0x8001 | a, r&0x7, v);
+		break;
+	case 10: /* C.ADDI C.ADDI16SP C.ADDI4SPN C.NOP */
+		v = p->from.offset;
+		if(r == p->to.reg && r != REGZERO && v != 0 && v >= -0x20 && v < 0x20)
+			return COP_CI(0x0001, p->to.reg, v);
+		if(r == p->to.reg && r == REGSP && v != 0 && (v&0xF) == 0 && v >= -0x200 && v < 0x200)
+			return COP_CI(0x6001, REGSP, immbits(v, "\5\7\10\6\4\11"));
+		if(r == REGSP && COMPREG(p->to.reg) && (v&0x3) == 0 && v > 0 && v < 0x400)
+			return COP_CIW(0x0000, p->to.reg&0x7, immbits(v, "\3\2\6\7\10\11\4\5"));
+		if(r == p->to.reg && r == REGZERO && v == 0)
+			return COP_CI(0x0001, 0, 0);
+		break;
+	case 11: /* C.JAL (rv32) */
+		if(thechar != 'i')
+			break;
+		if(r == REGLINK)
+			return asmcjmp(0x2001, p, first);
+		break;
+	case 12: /* C.J */
+		return asmcjmp(0xA001, p, first);
+		break;
+	case 13: /* C.ANDI */
+		v = p->from.offset;
+		if(r == p->to.reg && COMPREG(r) && v >= -0x20 && v < 0x20)
+			return COP_CI(0x8801, r&0x7, v);
+		break;
+	case 14: /* C.BEQZ */
+		return asmcbz(0xC001, p, first);
+	case 15: /* C.BNEZ */
+		return asmcbz(0xE001, p, first);
+	case 16: /* C.LW C.LWSP */
+		return asmcload(p, 0x4000, 4, 0x80);
+	case 17: /* C.FLW, C.FLWSP (rv32) */
+		if(thechar != 'i')
+			break;
+		return asmcload(p, 0x6000, 4, 0x80);
+	case 18: /* C.FLD, C.FLDSP */
+		return asmcload(p, 0x2000, 8, 0x100);
+	case 19: /* C.SW C.SWSP */
+		return asmcstore(p, 0xC000, 4, 0x80);
+	case 20: /* C.FSW, C.FSWSP (rv32) */
+		if(thechar != 'i')
+			break;
+		return asmcstore(p, 0xE000, 4, 0x80);
+	case 21: /* C.FSD, C.FSDSP */
+		return asmcstore(p, 0xA000, 8, 0x100);
+	case 22: /* C.ADDW C.SUBW (rv64) */
+		if(thechar != 'j')
+			break;
+		if(r == p->to.reg && COMPREG(p->from.reg) && COMPREG(p->to.reg)){
+			v = 0x9C01;
+			switch(o->as){
+			case AADDW:
+				v |= 1<<5;
+				break;
+			}
+			return COP_CR(v, p->from.reg&0x7, p->to.reg&0x7);
+		}
+		break;
+	case 23: /* C.ADDIW (rv64) */
+		if(thechar != 'j')
+			break;
+		v = p->from.offset;
+		if(p->as == AMOVW){
+			v = 0;
+			r = p->from.reg;
+		}
+		if(r == p->to.reg && r != REGZERO && v >= -0x20 && v < 0x20)
+			return COP_CI(0x2001, p->to.reg, v);
+		break;
+	case 24: /* C.LD (rv64) */
+		if(thechar != 'j')
+			break;
+		return asmcload(p, 0x6000, 8, 0x100);
+	case 25: /* C.SD (rv64) */
+		if(thechar != 'j')
+			break;
+		return asmcstore(p, 0xE000, 8, 0x100);
+	}
+	return 0;
+}
diff --git a/utils/il/l.h b/utils/il/l.h
new file mode 100644
index 00000000..3cb106af
--- /dev/null
+++ b/utils/il/l.h
@@ -0,0 +1,359 @@
+#include	<lib9.h>
+#include	<bio.h>
+#include	"../ic/i.out.h"
+#include	"../ld/elf.h"
+
+#ifndef	EXTERN
+#define	EXTERN	extern
+#endif
+
+typedef vlong xlong;
+
+typedef	struct	Adr	Adr;
+typedef	struct	Sym	Sym;
+typedef	struct	Autom	Auto;
+typedef	struct	Prog	Prog;
+typedef	struct	Optab	Optab;
+typedef	struct	Oprang	Oprang;
+typedef	uchar	Opcross[32][32];
+typedef	struct	Count	Count;
+
+#define	P		((Prog*)0)
+#define	S		((Sym*)0)
+#define	TNAME		(curtext&&curtext->from.sym?curtext->from.sym->name:noname)
+
+struct	Adr
+{
+	union
+	{
+		long	u0offset;
+		char*	u0sval;
+		Ieee*	u0ieee;
+		vlong*	u0vval;
+	} u0;
+	union
+	{
+		Auto*	u1autom;
+		Sym*	u1sym;
+	} u1;
+	char	type;
+	char	reg;
+	char	name;
+	char	class;
+};
+
+#define	offset	u0.u0offset
+#define	sval	u0.u0sval
+#define	ieee	u0.u0ieee
+#define	vval	u0.u0vval
+
+#define	autom	u1.u1autom
+#define	sym	u1.u1sym
+
+struct	Prog
+{
+	Adr	from;
+	Adr	to;
+	union
+	{
+		long	u0regused;
+		Prog*	u0forwd;
+	} u0;
+	Prog*	cond;
+	Prog*	link;
+	long	pc;
+	long	line;
+	uchar	mark;
+	uchar	optab;
+	char	as;
+	char	reg;
+};
+#define	regused	u0.u0regused
+#define	forwd	u0.u0forwd
+
+struct	Sym
+{
+	char	*name;
+	short	type;
+	short	version;
+	short	become;
+	short	frame;
+	ushort	file;
+	long	value;
+	long	sig;
+	Sym*	link;
+};
+struct	Autom
+{
+	Sym*	asym;
+	Auto*	link;
+	long	aoffset;
+	short	type;
+};
+struct	Optab
+{
+	char	as;
+	char	a1;
+	char	a3;
+	char	type;
+	char	ctype;
+	char	size;
+	char	op;
+	char	func3;
+	short	param;
+};
+struct	Oprang
+{
+	Optab*	start;
+	Optab*	stop;
+};
+struct	Count
+{
+	long	count;
+	long	outof;
+};
+
+enum
+{
+	STEXT		= 1,
+	SDATA,
+	SBSS,
+	SDATA1,
+	SXREF,
+	SLEAF,
+	SFILE,
+	SCONST,
+	SSTRING,
+
+	C_NONE		= 0,
+	C_REG,
+	C_CTLREG,
+	C_FREG,
+	C_ZREG,
+	C_ZCON,
+	C_SCON,
+	C_UCON,
+	C_LCON,
+	C_VCON,
+	C_FCON,
+	C_SACON,
+	C_SECON,
+	C_LACON,
+	C_LECON,
+	C_SRCON,
+	C_LRCON,
+	C_SBRA,
+	C_LBRA,
+	C_SAUTO,
+	C_ZOREG,
+	C_SOREG,
+	C_LOREG,
+	C_LAUTO,
+	C_SEXT,
+	C_LEXT,
+	C_GOK,
+
+	NSCHED		= 20,
+
+/* mark flags */
+	FOLL		= 1<<0,
+	LABEL		= 1<<1,
+	LEAF		= 1<<2,
+	SYNC		= 1<<3,
+	BRANCH		= 1<<4,
+	COMPR		= 1<<5,
+	SPASS		= 1<<6,
+
+	BIG		= 2048,
+	STRINGSZ	= 200,
+	NHASH		= 10007,
+	NHUNK		= 100000,
+	MINSIZ		= 64,
+	NENT		= 100,
+	MAXIO		= 8192,
+	MAXHIST		= 20,				/* limit of path elements for history symbols */
+};
+
+/* Major opcodes */
+enum {
+	OLOAD,	 OLOAD_FP,  Ocustom_0,	OMISC_MEM, OOP_IMM, OAUIPC, OOP_IMM_32,	O48b,
+	OSTORE,	 OSTORE_FP, Ocustom_1,	OAMO,	   OOP,	    OLUI,   OOP_32,	O64b,
+	OMADD,	 OMSUB,	    ONMSUB,	ONMADD,	   OOP_FP,  Ores_0, Ocustom_2,	O48b_2,
+	OBRANCH, OJALR,	    Ores_1,	OJAL,	   OSYSTEM, Ores_2, Ocustom_3,	O80b
+};
+
+EXTERN union
+{
+	struct
+	{
+		uchar	obuf[MAXIO];			/* output buffer */
+		uchar	ibuf[MAXIO];			/* input buffer */
+	} u;
+	char	dbuf[1];
+} buf;
+
+#define	cbuf	u.obuf
+#define	xbuf	u.ibuf
+
+EXTERN	long	HEADR;			/* length of header */
+EXTERN	int	HEADTYPE;		/* type of header */
+EXTERN	xlong	INITDAT;		/* data location */
+EXTERN	xlong	INITRND;		/* data round above text location */
+EXTERN	xlong	INITTEXT;		/* text location */
+EXTERN	xlong	INITTEXTP;		/* text location (physical) */
+EXTERN	char*	INITENTRY;		/* entry point */
+EXTERN	long	autosize;
+EXTERN	Biobuf	bso;
+EXTERN	long	bsssize;
+EXTERN	int	cbc;
+EXTERN	uchar*	cbp;
+EXTERN	int	cout;
+EXTERN	Auto*	curauto;
+EXTERN	Auto*	curhist;
+EXTERN	Prog*	curp;
+EXTERN	Prog*	curtext;
+EXTERN	Prog*	datap;
+EXTERN	long	datsize;
+EXTERN	char	debug[128];
+EXTERN	Prog*	etextp;
+EXTERN	Prog*	firstp;
+EXTERN	char	fnuxi4[4];	/* for 3l [sic] */
+EXTERN	char	fnuxi8[8];
+EXTERN	char*	noname;
+EXTERN	Sym*	hash[NHASH];
+EXTERN	Sym*	histfrog[MAXHIST];
+EXTERN	int	histfrogp;
+EXTERN	int	histgen;
+EXTERN	char*	library[50];
+EXTERN	char*	libraryobj[50];
+EXTERN	int	libraryp;
+EXTERN	int	xrefresolv;
+EXTERN	char*	hunk;
+EXTERN	char	inuxi1[1];
+EXTERN	char	inuxi2[2];
+EXTERN	char	inuxi4[4];
+EXTERN	char	inuxi8[8];
+EXTERN	Prog*	lastp;
+EXTERN	long	lcsize;
+EXTERN	char	literal[32];
+EXTERN	int	nerrors;
+EXTERN	long	nhunk;
+EXTERN	Prog	nopalign;
+EXTERN	long	instoffset;
+EXTERN	vlong	instoffx;
+EXTERN	Opcross	opcross[10];
+EXTERN	Oprang	oprange[ALAST];
+EXTERN	char*	outfile;
+EXTERN	long	pc;
+EXTERN	int	ptrsize;
+EXTERN	uchar	repop[ALAST];
+EXTERN	long	symsize;
+EXTERN	Prog*	textp;
+EXTERN	long	textsize;
+EXTERN	long	thunk;
+EXTERN	int	version;
+EXTERN	char	xcmp[32][32];
+EXTERN	Prog	zprg;
+EXTERN	int	dtype;
+EXTERN	int	little;
+
+EXTERN	struct
+{
+	Count	branch;
+	Count	fcmp;
+	Count	load;
+	Count	mfrom;
+	Count	page;
+	Count	jump;
+} nop;
+
+extern	char*	anames[];
+extern	Optab	optab[];
+extern	char	thechar;
+
+#pragma	varargck	type	"A"	int
+#pragma	varargck	type	"D"	Adr*
+#pragma	varargck	type	"N"	Adr*
+#pragma	varargck	type	"P"	Prog*
+#pragma	varargck	type	"S"	char*
+
+#pragma	varargck	argpos	diag 1
+
+int	Aconv(Fmt*);
+int	Dconv(Fmt*);
+int	Nconv(Fmt*);
+int	Pconv(Fmt*);
+int	Sconv(Fmt*);
+int	aclass(Adr*);
+void	addhist(long, int);
+void	append(Prog*, Prog*);
+void	asmb(void);
+int	asmcompressed(Prog*, Optab*, int, int);
+void	asmlc(void);
+int	asmout(Prog*, Optab*, int);
+void	asmsym(void);
+vlong	atolwhex(char*);
+Prog*	brloop(Prog*);
+void	buildop(void);
+void	buildrep(int, int);
+void	cflush(void);
+int	cmp(int, int);
+int	compound(Prog*);
+double	cputime(void);
+void	datblk(long, long, int);
+void	diag(char*, ...);
+void	dodata(void);
+void	doprof1(void);
+void	doprof2(void);
+vlong	entryvalue(void);
+void	errorexit(void);
+void	exchange(Prog*);
+int	find1(long, int);
+void	follow(void);
+void	gethunk(void);
+void	histtoauto(void);
+double	ieeedtod(Ieee*);
+long	ieeedtof(Ieee*);
+int	isnop(Prog*);
+void	ldobj(int, long, char*);
+void	loadlib(void);
+void	listinit(void);
+Sym*	lookup(char*, int);
+void	cput(int);
+void	llput(vlong);
+void	llputl(vlong);
+void	lput(long);
+void	lputl(long);
+void	bput(long);
+void	mkfwd(void);
+void*	mysbrk(ulong);
+void	names(void);
+void	nocache(Prog*);
+void	noops(void);
+void	nuxiinit(void);
+void	objfile(char*);
+int	ocmp(void*, void*);
+long	opirr(int);
+Optab*	oplook(Prog*);
+long	oprrr(int);
+void	patch(void);
+void	prasm(Prog*);
+void	prepend(Prog*, Prog*);
+Prog*	prg(void);
+int	pseudo(Prog*);
+void	putsymb(char*, int, vlong, int);
+long	regoff(Adr*);
+int		classreg(Adr*);
+int	relinv(int);
+int relrev(int);
+vlong	rnd(vlong, vlong);
+void	span(void);
+void	strnput(char*, int);
+void	undef(void);
+int	vconshift(vlong);
+void	wput(long);
+void	wputl(long);
+void	xdefine(char*, int, long);
+void	xfol(Prog*);
+void	xfol(Prog*);
+void	nopstat(char*, Count*);
diff --git a/utils/il/list.c b/utils/il/list.c
new file mode 100644
index 00000000..93989a97
--- /dev/null
+++ b/utils/il/list.c
@@ -0,0 +1,252 @@
+#include "l.h"
+
+void
+listinit(void)
+{
+
+	fmtinstall('A', Aconv);
+	fmtinstall('D', Dconv);
+	fmtinstall('P', Pconv);
+	fmtinstall('S', Sconv);
+	fmtinstall('N', Nconv);
+}
+
+void
+prasm(Prog *p)
+{
+	print("%P\n", p);
+}
+
+int
+Pconv(Fmt *fp)
+{
+	char str[STRINGSZ], *s;
+	Prog *p;
+	int a;
+
+	p = va_arg(fp->args, Prog*);
+	curp = p;
+	a = p->as;
+	if(a == ADATA || a == ADYNT || a == AINIT)
+		sprint(str, "(%ld)	%A	%D/%d,%D",
+			p->line, a, &p->from, p->reg, &p->to);
+	else{
+		s = str;
+		s += sprint(s, "(%ld)", p->line);
+		if(p->reg == NREG)
+			sprint(s, "	%A	%D,%D",
+				a, &p->from, &p->to);
+		else
+		if(p->from.type != D_FREG)
+			sprint(s, "	%A	%D,R%d,%D",
+				a, &p->from, p->reg, &p->to);
+		else
+			sprint(s, "	%A	%D,F%d,%D",
+				a, &p->from, p->reg, &p->to);
+	}
+	return fmtstrcpy(fp, str);
+}
+
+int
+Aconv(Fmt *fp)
+{
+	char *s;
+	int a;
+
+	a = va_arg(fp->args, int);
+	s = "???";
+	if(a >= AXXX && a < ALAST)
+		s = anames[a];
+	return fmtstrcpy(fp, s);
+}
+
+int
+Dconv(Fmt *fp)
+{
+	char str[STRINGSZ];
+	Adr *a;
+	long v;
+
+	a = va_arg(fp->args, Adr*);
+	switch(a->type) {
+
+	default:
+		sprint(str, "GOK-type(%d)", a->type);
+		break;
+
+	case D_NONE:
+		str[0] = 0;
+		if(a->name != D_NONE || a->reg != NREG || a->sym != S)
+			sprint(str, "%N(R%d)(NONE)", a, a->reg);
+		break;
+
+	case D_CONST:
+		if(a->reg == NREG)
+			sprint(str, "$%N", a);
+		else
+			sprint(str, "$%N(R%d)", a, a->reg);
+		break;
+
+	case D_VCONST:
+		sprint(str, "$%lld", *a->vval);
+		break;
+
+	case D_OREG:
+		if(a->reg != NREG)
+			sprint(str, "%N(R%d)", a, a->reg);
+		else
+			sprint(str, "%N", a);
+		break;
+
+	case D_REG:
+		sprint(str, "R%d", a->reg);
+		if(a->name != D_NONE || a->sym != S)
+			sprint(str, "%N(R%d)(REG)", a, a->reg);
+		break;
+
+	case D_FREG:
+		sprint(str, "F%d", a->reg);
+		if(a->name != D_NONE || a->sym != S)
+			sprint(str, "%N(R%d)(REG)", a, a->reg);
+		break;
+
+	case D_CTLREG:
+		sprint(str, "CSR(0x%lx)", a->offset);
+		break;
+
+	case D_BRANCH:	/* botch */
+		if(curp->cond != P) {
+			v = curp->cond->pc + INITTEXT;
+			if(a->sym != S)
+				sprint(str, "%s+%.5lux(BRANCH)", a->sym->name, v);
+			else
+				sprint(str, "%.5lux(BRANCH)", v);
+		} else
+			if(a->sym != S)
+				sprint(str, "%s+%ld(APC)", a->sym->name, a->offset);
+			else
+				sprint(str, "%ld(APC)", a->offset);
+		break;
+
+	case D_FCONST:
+		sprint(str, "$%e", ieeedtod(a->ieee));
+		break;
+
+	case D_SCONST:
+		sprint(str, "$\"%S\"", a->sval);
+		break;
+	}
+	return fmtstrcpy(fp, str);
+}
+
+int
+Nconv(Fmt *fp)
+{
+	char str[STRINGSZ];
+	Adr *a;
+	Sym *s;
+
+	a = va_arg(fp->args, Adr*);
+	s = a->sym;
+	switch(a->name) {
+	default:
+		sprint(str, "GOK-name(%d)", a->name);
+		break;
+
+	case D_NONE:
+		sprint(str, "%ld", a->offset);
+		break;
+
+	case D_EXTERN:
+		if(s == S)
+			sprint(str, "%ld(SB)", a->offset);
+		else
+			sprint(str, "%s+%ld(SB)", s->name, a->offset);
+		break;
+
+	case D_STATIC:
+		if(s == S)
+			sprint(str, "<>+%ld(SB)", a->offset);
+		else
+			sprint(str, "%s<>+%ld(SB)", s->name, a->offset);
+		break;
+
+	case D_AUTO:
+		if(s == S)
+			sprint(str, "%ld(SP)", a->offset);
+		else
+			sprint(str, "%s-%ld(SP)", s->name, -a->offset);
+		break;
+
+	case D_PARAM:
+		if(s == S)
+			sprint(str, "%ld(FP)", a->offset);
+		else
+			sprint(str, "%s+%ld(FP)", s->name, a->offset);
+		break;
+	}
+
+	return fmtstrcpy(fp, str);
+}
+
+int
+Sconv(Fmt *fp)
+{
+	int i, c;
+	char str[STRINGSZ], *p, *a;
+
+	a = va_arg(fp->args, char*);
+	p = str;
+	for(i=0; i<sizeof(long); i++) {
+		c = a[i] & 0xff;
+		if(c >= 'a' && c <= 'z' ||
+		   c >= 'A' && c <= 'Z' ||
+		   c >= '0' && c <= '9' ||
+		   c == ' ' || c == '%') {
+			*p++ = c;
+			continue;
+		}
+		*p++ = '\\';
+		switch(c) {
+		case 0:
+			*p++ = 'z';
+			continue;
+		case '\\':
+		case '"':
+			*p++ = c;
+			continue;
+		case '\n':
+			*p++ = 'n';
+			continue;
+		case '\t':
+			*p++ = 't';
+			continue;
+		}
+		*p++ = (c>>6) + '0';
+		*p++ = ((c>>3) & 7) + '0';
+		*p++ = (c & 7) + '0';
+	}
+	*p = 0;
+	return fmtstrcpy(fp, str);
+}
+
+void
+diag(char *fmt, ...)
+{
+	char buf[STRINGSZ], *tn;
+	va_list arg;
+
+	tn = "??none??";
+	if(curtext != P && curtext->from.sym != S)
+		tn = curtext->from.sym->name;
+	va_start(arg, fmt);
+	vseprint(buf, buf+sizeof(buf), fmt, arg);
+	va_end(arg);
+	print("%s: %s\n", tn, buf);
+
+	nerrors++;
+	if(nerrors > 10) {
+		print("too many errors\n");
+		errorexit();
+	}
+}
diff --git a/utils/il/mkfile b/utils/il/mkfile
new file mode 100644
index 00000000..4a655086
--- /dev/null
+++ b/utils/il/mkfile
@@ -0,0 +1,39 @@
+<../../mkconfig
+
+TARG=il		# also makes jl (for riscv64)
+
+OFILES=\
+	asm.$O\
+	compress.$O\
+	list.$O\
+	noop.$O\
+	obj.$O\
+	optab.$O\
+	pass.$O\
+	span.$O\
+	enam.$O\
+	$TARGMODEL.$O\
+	elf.$O\
+
+HFILES=\
+	l.h\
+	../ic/i.out.h\
+	../ld/elf.h\
+
+LIBS=bio 9			# order is important
+
+BIN=$ROOT/$OBJDIR/bin
+
+<$ROOT/mkfiles/mkone-$SHELLTYPE
+
+CFLAGS=	$CFLAGS -I../include -I.
+
+enam.$O:	../ic/enam.c
+	$CC $CFLAGS ../ic/enam.c
+elf.$O:	../ld/elf.c
+	$CC $CFLAGS ../ld/elf.c
+
+$TARGMODEL.$O:	../ld/$TARGMODEL.c
+	$CC $CFLAGS ../ld/$TARGMODEL.c
+
+install:V:	$BIN/jl
diff --git a/utils/il/noop.c b/utils/il/noop.c
new file mode 100644
index 00000000..05426130
--- /dev/null
+++ b/utils/il/noop.c
@@ -0,0 +1,341 @@
+#include	"l.h"
+
+void
+noops(void)
+{
+	Prog *p, *q, *q1;
+	int o, curframe, curbecome, maxbecome;
+
+	/*
+	 * find leaf subroutines
+	 * become sizes
+	 * frame sizes
+	 * strip NOPs
+	 * expand RET
+	 * expand BECOME pseudo
+	 */
+
+	if(debug['v'])
+		Bprint(&bso, "%5.2f noops\n", cputime());
+	Bflush(&bso);
+
+	curframe = 0;
+	curbecome = 0;
+	maxbecome = 0;
+	curtext = 0;
+
+	q = P;
+	for(p = firstp; p != P; p = p->link) {
+
+		/* find out how much arg space is used in this TEXT */
+		if(p->to.type == D_OREG && p->to.reg == REGSP)
+			if(p->to.offset > curframe)
+				curframe = p->to.offset;
+
+		switch(p->as) {
+		case ATEXT:
+			if(curtext && curtext->from.sym) {
+				curtext->from.sym->frame = curframe;
+				curtext->from.sym->become = curbecome;
+				if(curbecome > maxbecome)
+					maxbecome = curbecome;
+			}
+			curframe = 0;
+			curbecome = 0;
+
+			p->mark |= LABEL|LEAF|SYNC;
+			if(p->link)
+				p->link->mark |= LABEL;
+			curtext = p;
+			break;
+
+		/* too hard, just leave alone */
+		case AMOVW:
+		case AMOV:
+			if(p->to.type == D_CTLREG) {
+				p->mark |= LABEL|SYNC;
+				break;
+			}
+			if(p->from.type == D_CTLREG) {
+				p->mark |= LABEL|SYNC;
+				break;
+			}
+			break;
+
+		/* too hard, just leave alone */
+		case ASYS:
+		case AWORD:
+			p->mark |= LABEL|SYNC;
+			break;
+
+		case ARET:
+			/* special form of RET is BECOME */
+			if(p->from.type == D_CONST)
+				if(p->from.offset > curbecome)
+					curbecome = p->from.offset;
+
+			if(p->link != P)
+				p->link->mark |= LABEL;
+			break;
+
+		case ANOP:
+			q1 = p->link;
+			q->link = q1;		/* q is non-nop */
+			q1->mark |= p->mark;
+			continue;
+
+		case AJAL:
+			if(curtext != P)
+				curtext->mark &= ~LEAF;
+
+		case AJMP:
+		case ABEQ:
+		case ABGE:
+		case ABGEU:
+		case ABLT:
+		case ABLTU:
+		case ABNE:
+			p->mark |= BRANCH;
+
+			q1 = p->cond;
+			if(q1 != P) {
+				while(q1->as == ANOP) {
+					q1 = q1->link;
+					p->cond = q1;
+				}
+				if(!(q1->mark & LEAF))
+					q1->mark |= LABEL;
+			} else
+				p->mark |= LABEL;
+			q1 = p->link;
+			if(q1 != P)
+				q1->mark |= LABEL;
+			break;
+		}
+		q = p;
+	}
+
+	if(curtext && curtext->from.sym) {
+		curtext->from.sym->frame = curframe;
+		curtext->from.sym->become = curbecome;
+		if(curbecome > maxbecome)
+			maxbecome = curbecome;
+	}
+
+	if(debug['b'])
+		print("max become = %d\n", maxbecome);
+	xdefine("ALEFbecome", STEXT, maxbecome);
+
+	curtext = 0;
+	for(p = firstp; p != P; p = p->link) {
+		switch(p->as) {
+		case ATEXT:
+			curtext = p;
+			break;
+		case AJAL:
+			if(curtext != P && curtext->from.sym != S && curtext->to.offset >= 0) {
+				o = maxbecome - curtext->from.sym->frame;
+				if(o <= 0)
+					break;
+				/* calling a become or calling a variable */
+				if(p->to.sym == S || p->to.sym->become) {
+					curtext->to.offset += o;
+					if(debug['b']) {
+						curp = p;
+						print("%D calling %D increase %d\n",
+							&curtext->from, &p->to, o);
+					}
+				}
+			}
+			break;
+		}
+	}
+
+	for(p = firstp; p != P; p = p->link) {
+		o = p->as;
+		switch(o) {
+		case ATEXT:
+			curtext = p;
+			autosize = p->to.offset + ptrsize;
+			if(autosize <= ptrsize) {
+				if(curtext->mark & LEAF || autosize <= 0) {
+					p->to.offset = -ptrsize;
+					autosize = 0;
+				} else if(ptrsize == 4) {
+					p->to.offset = 4;
+					autosize = 8;
+				}
+			}
+
+			q = p;
+			if(autosize) {
+				q = prg();
+				q->as = AADD;
+				q->line = p->line;
+				q->from.type = D_CONST;
+				q->from.offset = -autosize;
+				q->to.type = D_REG;
+				q->to.reg = REGSP;
+
+				q->link = p->link;
+				p->link = q;
+			} else
+			if(!(curtext->mark & LEAF)) {
+				if(debug['v'])
+					Bprint(&bso, "save suppressed in: %s\n",
+						curtext->from.sym->name);
+				Bflush(&bso);
+				curtext->mark |= LEAF;
+			}
+
+			if(curtext->mark & LEAF) {
+				if(curtext->from.sym)
+					curtext->from.sym->type = SLEAF;
+				break;
+			}
+
+			q1 = prg();
+			q1->as = thechar == 'j' ? AMOV : AMOVW;
+			q1->line = p->line;
+			q1->from.type = D_REG;
+			q1->from.reg = REGLINK;
+			q1->to.type = D_OREG;
+			q1->from.offset = 0;
+			q1->to.reg = REGSP;
+
+			q1->link = q->link;
+			q->link = q1;
+			break;
+
+		case ARET:
+			nocache(p);
+			if(p->from.type == D_CONST)
+				goto become;
+			if(curtext->mark & LEAF) {
+				if(!autosize) {
+					p->as = AJMP;
+					p->from = zprg.from;
+					p->to.type = D_OREG;
+					p->to.offset = 0;
+					p->to.reg = REGLINK;
+					p->mark |= BRANCH;
+					break;
+				}
+
+				p->as = AADD;
+				p->from.type = D_CONST;
+				p->from.offset = autosize;
+				p->to.type = D_REG;
+				p->to.reg = REGSP;
+
+				q = prg();
+				q->as = AJMP;
+				q->line = p->line;
+				q->to.type = D_OREG;
+				q->to.offset = 0;
+				q->to.reg = REGLINK;
+				q->mark |= BRANCH;
+
+				q->link = p->link;
+				p->link = q;
+				break;
+			}
+			p->as = thechar == 'j' ? AMOV : AMOVW;
+			p->from.type = D_OREG;
+			p->from.offset = 0;
+			p->from.reg = REGSP;
+			p->to.type = D_REG;
+			p->to.reg = REGLINK;
+
+			q = p;
+			if(autosize) {
+				q = prg();
+				q->as = AADD;
+				q->line = p->line;
+				q->from.type = D_CONST;
+				q->from.offset = autosize;
+				q->to.type = D_REG;
+				q->to.reg = REGSP;
+
+				q->link = p->link;
+				p->link = q;
+			}
+
+			q1 = prg();
+			q1->as = AJMP;
+			q1->line = p->line;
+			q1->to.type = D_OREG;
+			q1->to.offset = 0;
+			q1->to.reg = REGLINK;
+			q1->mark |= BRANCH;
+
+			q1->link = q->link;
+			q->link = q1;
+			break;
+
+		become:
+			if(curtext->mark & LEAF) {
+
+				q = prg();
+				q->line = p->line;
+				q->as = AJMP;
+				q->from = zprg.from;
+				q->to = p->to;
+				q->cond = p->cond;
+				q->link = p->link;
+				q->mark |= BRANCH;
+				p->link = q;
+
+				p->as = AADD;
+				p->from = zprg.from;
+				p->from.type = D_CONST;
+				p->from.offset = autosize;
+				p->to = zprg.to;
+				p->to.type = D_REG;
+				p->to.reg = REGSP;
+
+				break;
+			}
+			q = prg();
+			q->line = p->line;
+			q->as = AJMP;
+			q->from = zprg.from;
+			q->to = p->to;
+			q->cond = p->cond;
+			q->link = p->link;
+			q->mark |= BRANCH;
+			p->link = q;
+
+			q = prg();
+			q->line = p->line;
+			q->as = AADD;
+			q->from.type = D_CONST;
+			q->from.offset = autosize;
+			q->to.type = D_REG;
+			q->to.reg = REGSP;
+			q->link = p->link;
+			p->link = q;
+
+			p->as = thechar == 'j' ? AMOV : AMOVW;
+			p->from = zprg.from;
+			p->from.type = D_OREG;
+			p->from.offset = 0;
+			p->from.reg = REGSP;
+			p->to = zprg.to;
+			p->to.type = D_REG;
+			p->to.reg = REGLINK;
+
+			break;
+		}
+	}
+
+	curtext = P;
+}
+
+void
+nocache(Prog *p)
+{
+	p->optab = 0;
+	p->from.class = 0;
+	p->to.class = 0;
+}
diff --git a/utils/il/obj.c b/utils/il/obj.c
new file mode 100644
index 00000000..42cca8ac
--- /dev/null
+++ b/utils/il/obj.c
@@ -0,0 +1,1517 @@
+#define	EXTERN
+#include	"l.h"
+#include	<ar.h>
+
+#ifndef	DEFAULT
+#define	DEFAULT	'9'
+#endif
+
+char	*noname		= "<none>";
+char	symname[]	= SYMDEF;
+char	thechar		= 'i';
+char	*thestring 	= "riscv";
+
+/*
+ *	-H1						is headerless
+ *	-H2 -T4128 -R4096		is plan9 format
+ *	-H5 -T0x4000A0 -R4		is elf executable
+ */
+
+int little;
+
+void
+main(int argc, char *argv[])
+{
+	int c;
+	char *a;
+
+	Binit(&bso, 1, OWRITE);
+	cout = -1;
+	listinit();
+	outfile = 0;
+	nerrors = 0;
+	curtext = P;
+	HEADTYPE = -1;
+	INITTEXT = -1;
+	INITTEXTP = -1;
+	INITDAT = -1;
+	INITRND = -1;
+	INITENTRY = 0;
+	ptrsize = 4;
+
+	a = strrchr(argv[0], '/');
+	if(a == nil)
+		a = argv[0];
+	else
+		a++;
+	if(*a == 'j')
+		thechar = 'j';
+	ARGBEGIN {
+	default:
+		c = ARGC();
+		if(c >= 0 && c < sizeof(debug))
+			debug[c]++;
+		break;
+	case 'o':
+		outfile = ARGF();
+		break;
+	case 'E':
+		a = ARGF();
+		if(a)
+			INITENTRY = a;
+		break;
+	case 'T':
+		a = ARGF();
+		if(a)
+			INITTEXT = atolwhex(a);
+		break;
+	case 'P':
+		a = ARGF();
+		if(a)
+			INITTEXTP = atolwhex(a);
+		break;
+	case 'D':
+		a = ARGF();
+		if(a)
+			INITDAT = atolwhex(a);
+		break;
+	case 'R':
+		a = ARGF();
+		if(a)
+			INITRND = atolwhex(a);
+		break;
+	case 'H':
+		a = ARGF();
+		if(a)
+			HEADTYPE = atolwhex(a);
+		break;
+	} ARGEND
+
+	USED(argc);
+
+	if(*argv == 0) {
+		diag("usage: %cl [-options] objects", thechar);
+		errorexit();
+	}
+	if(debug['j'])
+		thechar = 'j';
+	if(thechar == 'j'){
+		thestring = "riscv64";
+		ptrsize = 8;
+	}
+	if(!debug['9'] && !debug['U'] && !debug['B'])
+		debug[DEFAULT] = 1;
+	if(HEADTYPE == -1) {
+		if(debug['U'])
+			HEADTYPE = 5;
+		if(debug['B'])
+			HEADTYPE = 1;
+		if(debug['9'])
+			HEADTYPE = 2;
+	}
+	switch(HEADTYPE) {
+	default:
+		diag("unknown -H option");
+		errorexit();
+
+	case 1:	/* headerless */
+		HEADR = 0;
+		if(INITTEXT == -1)
+			INITTEXT = 0;
+		if(INITDAT == -1)
+			INITDAT = 0;
+		if(INITRND == -1)
+			INITRND = 8;
+		break;
+	case 2:	/* plan 9 */
+		HEADR = 32L;
+		if(INITTEXT == -1)
+			INITTEXT = 4128;
+		if(INITDAT == -1)
+			INITDAT = 0;
+		if(INITRND == -1)
+			INITRND = 4096;
+		break;
+ 	case 5:	/* elf executable */
+		HEADR = rnd(52L+3*32L, 16);
+		if(INITTEXT == -1)
+			INITTEXT = 0;
+		if(INITDAT == -1)
+			INITDAT = 0;
+		if(INITRND == -1)
+			INITRND = 8;
+		break;
+	}
+	if (INITTEXTP == -1)
+		INITTEXTP = INITTEXT;
+	if(INITDAT != 0 && INITRND != 0)
+		print("warning: -D0x%llux is ignored because of -R0x%llux\n",
+			INITDAT, INITRND);
+	if(debug['v'])
+		Bprint(&bso, "HEADER = -H0x%d -T0x%llux -D0x%llux -R0x%llux\n",
+			HEADTYPE, INITTEXT, INITDAT, INITRND);
+	Bflush(&bso);
+	zprg.as = AGOK;
+	zprg.reg = NREG;
+	zprg.from.name = D_NONE;
+	zprg.from.type = D_NONE;
+	zprg.from.reg = NREG;
+	zprg.to = zprg.from;
+	nopalign = zprg;
+	nopalign.as = AADD;
+	nopalign.from.type = D_CONST;
+	nopalign.to.type = D_REG;
+	nopalign.to.reg = REGZERO;
+	nopalign.reg = REGZERO;
+	buildop();
+	histgen = 0;
+	textp = P;
+	datap = P;
+	pc = 0;
+	dtype = 4;
+	if(outfile == 0) {
+		static char name[20];
+
+		snprint(name, sizeof name, "%c.out", thechar);
+		outfile = name;
+	}
+	cout = create(outfile, 1, 0775);
+	if(cout < 0) {
+		diag("%s: cannot create", outfile);
+		errorexit();
+	}
+	nuxiinit();
+
+	version = 0;
+	cbp = buf.cbuf;
+	cbc = sizeof(buf.cbuf);
+	firstp = prg();
+	lastp = firstp;
+
+	if(INITENTRY == 0) {
+		INITENTRY = "_main";
+		if(debug['p'])
+			INITENTRY = "_mainp";
+		if(!debug['l'])
+			lookup(INITENTRY, 0)->type = SXREF;
+	} else
+		lookup(INITENTRY, 0)->type = SXREF;
+
+	while(*argv)
+		objfile(*argv++);
+	if(!debug['l'])
+		loadlib();
+	firstp = firstp->link;
+	if(firstp == P)
+		goto out;
+	patch();
+	if(debug['p'])
+		if(debug['1'])
+			doprof1();
+		else
+			doprof2();
+	dodata();
+	follow();
+	if(firstp == P)
+		goto out;
+	noops();
+	span();
+	asmb();
+	undef();
+
+out:
+	if(debug['v']) {
+		Bprint(&bso, "%5.2f cpu time\n", cputime());
+		Bprint(&bso, "%ld memory used\n", thunk);
+		Bprint(&bso, "%d sizeof adr\n", sizeof(Adr));
+		Bprint(&bso, "%d sizeof prog\n", sizeof(Prog));
+	}
+	Bflush(&bso);
+	errorexit();
+}
+
+void
+loadlib(void)
+{
+	int i;
+	long h;
+	Sym *s;
+
+loop:
+	xrefresolv = 0;
+	for(i=0; i<libraryp; i++) {
+		if(debug['v'])
+			Bprint(&bso, "%5.2f autolib: %s (from %s)\n", cputime(), library[i], libraryobj[i]);
+		objfile(library[i]);
+	}
+	if(xrefresolv)
+	for(h=0; h<nelem(hash); h++)
+	for(s = hash[h]; s != S; s = s->link)
+		if(s->type == SXREF)
+			goto loop;
+}
+
+void
+errorexit(void)
+{
+
+	if(nerrors) {
+		if(cout >= 0)
+			remove(outfile);
+		exits("error");
+	}
+	exits(0);
+}
+
+void
+objfile(char *file)
+{
+	long off, esym, cnt, l;
+	int f, work;
+	Sym *s;
+	char magbuf[SARMAG];
+	char name[100], pname[150];
+	struct ar_hdr arhdr;
+	char *e, *start, *stop;
+
+	if(file[0] == '-' && file[1] == 'l') {
+		if(debug['9'])
+			sprint(name, "/%s/lib/lib", thestring);
+		else
+			sprint(name, "/usr/%clib/lib", thechar);
+		strcat(name, file+2);
+		strcat(name, ".a");
+		file = name;
+	}
+	if(debug['v'])
+		Bprint(&bso, "%5.2f ldobj: %s\n", cputime(), file);
+	Bflush(&bso);
+	f = open(file, 0);
+	if(f < 0) {
+		diag("cannot open file: %s", file);
+		errorexit();
+	}
+	l = read(f, magbuf, SARMAG);
+	if(l != SARMAG || strncmp(magbuf, ARMAG, SARMAG)){
+		/* load it as a regular file */
+		l = seek(f, 0L, 2);
+		seek(f, 0L, 0);
+		ldobj(f, l, file);
+		close(f);
+		return;
+	}
+
+	if(debug['v'])
+		Bprint(&bso, "%5.2f ldlib: %s\n", cputime(), file);
+	l = read(f, &arhdr, SAR_HDR);
+	if(l != SAR_HDR) {
+		diag("%s: short read on archive file symbol header", file);
+		goto out;
+	}
+	if(strncmp(arhdr.name, symname, strlen(symname))) {
+		diag("%s: first entry not symbol header", file);
+		goto out;
+	}
+
+	esym = SARMAG + SAR_HDR + atolwhex(arhdr.size);
+	off = SARMAG + SAR_HDR;
+
+	/*
+	 * just bang the whole symbol file into memory
+	 */
+	seek(f, off, 0);
+	cnt = esym - off;
+	start = malloc(cnt + 10);
+	cnt = read(f, start, cnt);
+	if(cnt <= 0){
+		close(f);
+		return;
+	}
+	stop = &start[cnt];
+	memset(stop, 0, 10);
+
+	work = 1;
+	while(work){
+		if(debug['v'])
+			Bprint(&bso, "%5.2f library pass: %s\n", cputime(), file);
+		Bflush(&bso);
+		work = 0;
+		for(e = start; e < stop; e = strchr(e+5, 0) + 1) {
+			s = lookup(e+5, 0);
+			if(s->type != SXREF)
+				continue;
+			sprint(pname, "%s(%s)", file, s->name);
+			if(debug['v'])
+				Bprint(&bso, "%5.2f library: %s\n", cputime(), pname);
+			Bflush(&bso);
+			l = e[1] & 0xff;
+			l |= (e[2] & 0xff) << 8;
+			l |= (e[3] & 0xff) << 16;
+			l |= (e[4] & 0xff) << 24;
+			seek(f, l, 0);
+			l = read(f, &arhdr, SAR_HDR);
+			if(l != SAR_HDR)
+				goto bad;
+			if(strncmp(arhdr.fmag, ARFMAG, sizeof(arhdr.fmag)))
+				goto bad;
+			l = atolwhex(arhdr.size);
+			ldobj(f, l, pname);
+			if(s->type == SXREF) {
+				diag("%s: failed to load: %s", file, s->name);
+				errorexit();
+			}
+			work = 1;
+			xrefresolv = 1;
+		}
+	}
+	return;
+
+bad:
+	diag("%s: bad or out of date archive", file);
+out:
+	close(f);
+}
+
+int
+zaddr(uchar *p, Adr *a, Sym *h[])
+{
+	int i, c;
+	long l;
+	Sym *s;
+	Auto *u;
+
+	c = p[2];
+	if(c < 0 || c > NSYM){
+		print("sym out of range: %d\n", c);
+		p[0] = ALAST+1;
+		return 0;
+	}
+	a->type = p[0];
+	a->reg = p[1];
+	a->sym = h[c];
+	a->name = p[3];
+	c = 4;
+
+	if(a->reg < 0 || a->reg > NREG) {
+		print("register out of range %d\n", a->reg);
+		p[0] = ALAST+1;
+		return 0;	/*  force real diagnostic */
+	}
+
+	switch(a->type) {
+	default:
+		print("unknown type %d\n", a->type);
+		p[0] = ALAST+1;
+		return 0;	/*  force real diagnostic */
+
+	case D_NONE:
+	case D_REG:
+	case D_FREG:
+		break;
+
+	case D_CTLREG:
+	case D_BRANCH:
+	case D_OREG:
+	case D_CONST:
+		a->offset = p[4] | (p[5]<<8) |
+			(p[6]<<16) | (p[7]<<24);
+		c += 4;
+		break;
+
+	case D_SCONST:
+		while(nhunk < NSNAME)
+			gethunk();
+		a->sval = (char*)hunk;
+		nhunk -= NSNAME;
+		hunk += NSNAME;
+
+		memmove(a->sval, p+4, NSNAME);
+		c += NSNAME;
+		break;
+
+	case D_VCONST:
+		while(nhunk < 12)
+			gethunk();
+		if((uintptr)hunk & 2){
+			nhunk -= 4;
+			hunk += 4;
+		}
+		a->vval = (vlong*)hunk;
+		nhunk -= 8;
+		hunk += 8;
+		*(long*)a->vval = p[4] | (p[5]<<8) |
+			(p[6]<<16) | (p[7]<<24);
+		*((long*)a->vval + 1) = p[8] | (p[9]<<8) |
+			(p[10]<<16) | (p[11]<<24);
+		c += 8;
+		break;
+
+	case D_FCONST:
+		while(nhunk < sizeof(Ieee))
+			gethunk();
+		a->ieee = (Ieee*)hunk;
+		nhunk -= NSNAME;
+		hunk += NSNAME;
+
+		a->ieee->l = p[4] | (p[5]<<8) |
+			(p[6]<<16) | (p[7]<<24);
+		a->ieee->h = p[8] | (p[9]<<8) |
+			(p[10]<<16) | (p[11]<<24);
+		c += 8;
+		break;
+	}
+	s = a->sym;
+	if(s == S)
+		return c;
+	i = a->name;
+	if(i != D_AUTO && i != D_PARAM)
+		return c;
+
+	l = a->offset;
+	for(u=curauto; u; u=u->link)
+		if(u->asym == s)
+		if(u->type == i) {
+			if(u->aoffset > l)
+				u->aoffset = l;
+			return c;
+		}
+
+	while(nhunk < sizeof(Auto))
+		gethunk();
+	u = (Auto*)hunk;
+	nhunk -= sizeof(Auto);
+	hunk += sizeof(Auto);
+
+	u->link = curauto;
+	curauto = u;
+	u->asym = s;
+	u->aoffset = l;
+	u->type = i;
+	return c;
+}
+
+void
+addlib(char *obj)
+{
+	char name[1024], comp[256], *p;
+	int i;
+
+	if(histfrogp <= 0)
+		return;
+
+	if(histfrog[0]->name[1] == '/') {
+		sprint(name, "");
+		i = 1;
+	} else
+	if(histfrog[0]->name[1] == '.') {
+		sprint(name, ".");
+		i = 0;
+	} else {
+		if(debug['9'])
+			sprint(name, "/%s/lib", thestring);
+		else
+			sprint(name, "/usr/%clib", thechar);
+		i = 0;
+	}
+
+	for(; i<histfrogp; i++) {
+		snprint(comp, sizeof comp, histfrog[i]->name+1);
+		for(;;) {
+			p = strstr(comp, "$O");
+			if(p == 0)
+				break;
+			memmove(p+1, p+2, strlen(p+2)+1);
+			p[0] = thechar;
+		}
+		for(;;) {
+			p = strstr(comp, "$M");
+			if(p == 0)
+				break;
+			if(strlen(comp)+strlen(thestring)-2+1 >= sizeof comp) {
+				diag("library component too long");
+				return;
+			}
+			memmove(p+strlen(thestring), p+2, strlen(p+2)+1);
+			memmove(p, thestring, strlen(thestring));
+		}
+		if(strlen(name) + strlen(comp) + 3 >= sizeof(name)) {
+			diag("library component too long");
+			return;
+		}
+		strcat(name, "/");
+		strcat(name, comp);
+	}
+	for(i=0; i<libraryp; i++)
+		if(strcmp(name, library[i]) == 0)
+			return;
+	if(libraryp == nelem(library)){
+		diag("too many autolibs; skipping %s", name);
+		return;
+	}
+
+	p = malloc(strlen(name) + 1);
+	strcpy(p, name);
+	library[libraryp] = p;
+	p = malloc(strlen(obj) + 1);
+	strcpy(p, obj);
+	libraryobj[libraryp] = p;
+	libraryp++;
+}
+
+void
+addhist(long line, int type)
+{
+	Auto *u;
+	Sym *s;
+	int i, j, k;
+
+	u = malloc(sizeof(Auto));
+	s = malloc(sizeof(Sym));
+	s->name = malloc(2*(histfrogp+1) + 1);
+
+	u->asym = s;
+	u->type = type;
+	u->aoffset = line;
+	u->link = curhist;
+	curhist = u;
+
+	j = 1;
+	for(i=0; i<histfrogp; i++) {
+		k = histfrog[i]->value;
+		s->name[j+0] = k>>8;
+		s->name[j+1] = k;
+		j += 2;
+	}
+}
+
+void
+histtoauto(void)
+{
+	Auto *l;
+
+	while(l = curhist) {
+		curhist = l->link;
+		l->link = curauto;
+		curauto = l;
+	}
+}
+
+void
+collapsefrog(Sym *s)
+{
+	int i;
+
+	/*
+	 * bad encoding of path components only allows
+	 * MAXHIST components. if there is an overflow,
+	 * first try to collapse xxx/..
+	 */
+	for(i=1; i<histfrogp; i++)
+		if(strcmp(histfrog[i]->name+1, "..") == 0) {
+			memmove(histfrog+i-1, histfrog+i+1,
+				(histfrogp-i-1)*sizeof(histfrog[0]));
+			histfrogp--;
+			goto out;
+		}
+
+	/*
+	 * next try to collapse .
+	 */
+	for(i=0; i<histfrogp; i++)
+		if(strcmp(histfrog[i]->name+1, ".") == 0) {
+			memmove(histfrog+i, histfrog+i+1,
+				(histfrogp-i-1)*sizeof(histfrog[0]));
+			goto out;
+		}
+
+	/*
+	 * last chance, just truncate from front
+	 */
+	memmove(histfrog+0, histfrog+1,
+		(histfrogp-1)*sizeof(histfrog[0]));
+
+out:
+	histfrog[histfrogp-1] = s;
+}
+
+void
+nopout(Prog *p)
+{
+	p->as = ANOP;
+	p->from.type = D_NONE;
+	p->to.type = D_NONE;
+}
+
+uchar*
+readsome(int f, uchar *buf, uchar *good, uchar *stop, int max)
+{
+	int n;
+
+	n = stop - good;
+	memmove(buf, good, stop - good);
+	stop = buf + n;
+	n = MAXIO - n;
+	if(n > max)
+		n = max;
+	n = read(f, stop, n);
+	if(n <= 0)
+		return 0;
+	return stop + n;
+}
+
+void
+ldobj(int f, long c, char *pn)
+{
+	long ipc;
+	Prog *p, *t;
+	uchar *bloc, *bsize, *stop;
+	Sym *h[NSYM], *s, *di;
+	int v, o, r, skip;
+	ulong sig;
+	static int files;
+	static char **filen;
+	char **nfilen;
+
+	if((files&15) == 0){
+		nfilen = malloc((files+16)*sizeof(char*));
+		memmove(nfilen, filen, files*sizeof(char*));
+		free(filen);
+		filen = nfilen;
+	}
+	filen[files++] = strdup(pn);
+
+	bsize = buf.xbuf;
+	bloc = buf.xbuf;
+	di = S;
+
+newloop:
+	memset(h, 0, sizeof(h));
+	version++;
+	histfrogp = 0;
+	ipc = pc;
+	skip = 0;
+
+loop:
+	if(c <= 0)
+		goto eof;
+	r = bsize - bloc;
+	if(r < 100 && r < c) {		/* enough for largest prog */
+		bsize = readsome(f, buf.xbuf, bloc, bsize, c);
+		if(bsize == 0)
+			goto eof;
+		bloc = buf.xbuf;
+		goto loop;
+	}
+	o = bloc[0];		/* as */
+	if(o <= AXXX || o >= ALAST) {
+		diag("%s: line %ld: opcode out of range %d", pn, pc-ipc, o);
+		print("	probably not a .%c file\n", thechar);
+		errorexit();
+	}
+	if(o == ANAME || o == ASIGNAME) {
+		sig = 0;
+		if(o == ASIGNAME){
+			sig = bloc[1] | (bloc[2]<<8) | (bloc[3]<<16) | (bloc[4]<<24);
+			bloc += 4;
+			c -= 4;
+		}
+		stop = memchr(&bloc[3], 0, bsize-&bloc[3]);
+		if(stop == 0){
+			bsize = readsome(f, buf.xbuf, bloc, bsize, c);
+			if(bsize == 0)
+				goto eof;
+			bloc = buf.xbuf;
+			stop = memchr(&bloc[3], 0, bsize-&bloc[3]);
+			if(stop == 0){
+				fprint(2, "%s: name too long\n", pn);
+				errorexit();
+			}
+		}
+		v = bloc[1];	/* type */
+		o = bloc[2];	/* sym */
+		bloc += 3;
+		c -= 3;
+
+		r = 0;
+		if(v == D_STATIC)
+			r = version;
+		s = lookup((char*)bloc, r);
+		c -= &stop[1] - bloc;
+		bloc = stop + 1;
+
+		if(debug['S'] && r == 0)
+			sig = 1729;
+		if(sig != 0){
+			if(s->sig != 0 && s->sig != sig)
+				diag("incompatible type signatures %lux(%s) and %lux(%s) for %s", s->sig, filen[s->file], sig, pn, s->name);
+			s->sig = sig;
+			s->file = files-1;
+		}
+
+		if(debug['W'])
+			print("	ANAME	%s\n", s->name);
+		h[o] = s;
+		if((v == D_EXTERN || v == D_STATIC) && s->type == 0)
+			s->type = SXREF;
+		if(v == D_FILE) {
+			if(s->type != SFILE) {
+				histgen++;
+				s->type = SFILE;
+				s->value = histgen;
+			}
+			if(histfrogp < MAXHIST) {
+				histfrog[histfrogp] = s;
+				histfrogp++;
+			} else
+				collapsefrog(s);
+		}
+		goto loop;
+	}
+
+	if(nhunk < sizeof(Prog))
+		gethunk();
+	p = (Prog*)hunk;
+	nhunk -= sizeof(Prog);
+	hunk += sizeof(Prog);
+
+	p->as = o;
+	p->reg = bloc[1];
+	p->line = bloc[2] | (bloc[3]<<8) | (bloc[4]<<16) | (bloc[5]<<24);
+
+	r = zaddr(bloc+6, &p->from, h) + 6;
+	r += zaddr(bloc+r, &p->to, h);
+	bloc += r;
+	c -= r;
+
+	if(p->reg < 0 || p->reg > NREG)
+		diag("register out of range %d", p->reg);
+
+	p->link = P;
+	p->cond = P;
+
+	if(debug['W'])
+		print("%P\n", p);
+
+	if(thechar == 'i') {
+		switch(o) {
+		case AMOV:
+			if(p->from.type == D_OREG || p->to.type == D_OREG)
+				o = AMOVW;
+			break;
+
+		case AMOVW:
+		case AMOVWU:
+			if(p->from.type == D_OREG || p->to.type == D_OREG)
+				o = AMOVW;
+			else
+				o = AMOV;
+			break;
+
+		case ADIVW:
+		case ADIVUW:
+			o = ADIV;
+			break;
+
+		case AREMW:
+		case AREMUW:
+			o = AREM;
+			break;
+
+		case AADDW:	o = AADD; break;
+		case ASUBW:	o = ASUB; break;
+		case ASLLW:	o = ASLL; break;
+		case ASRLW:	o = ASRL; break;
+		case ASRAW:	o = ASRA; break;
+		case AMULW:	o = AMUL; break;
+		}
+		p->as = o;
+	}
+
+	switch(o) {
+	case AHISTORY:
+		if(p->to.offset == -1) {
+			addlib(pn);
+			histfrogp = 0;
+			goto loop;
+		}
+		addhist(p->line, D_FILE);		/* 'z' */
+		if(p->to.offset)
+			addhist(p->to.offset, D_FILE1);	/* 'Z' */
+		histfrogp = 0;
+		goto loop;
+
+	case AEND:
+		histtoauto();
+		if(curtext != P)
+			curtext->to.autom = curauto;
+		curauto = 0;
+		curtext = P;
+		if(c)
+			goto newloop;
+		return;
+
+	case AGLOBL:
+		s = p->from.sym;
+		if(s == S) {
+			diag("GLOBL must have a name\n%P", p);
+			errorexit();
+		}
+		if(s->type == 0 || s->type == SXREF) {
+			s->type = SBSS;
+			s->value = 0;
+		}
+		if(s->type != SBSS) {
+			diag("redefinition: %s\n%P", s->name, p);
+			s->type = SBSS;
+			s->value = 0;
+		}
+		if(p->to.offset > s->value)
+			s->value = p->to.offset;
+		break;
+
+	case ADYNT:
+		if(p->to.sym == S) {
+			diag("DYNT without a sym\n%P", p);
+			break;
+		}
+		di = p->to.sym;
+		p->reg = 4;
+		if(di->type == SXREF) {
+			if(debug['z'])
+				Bprint(&bso, "%P set to %d\n", p, dtype);
+			di->type = SCONST;
+			di->value = dtype;
+			dtype += 4;
+		}
+		if(p->from.sym == S)
+			break;
+
+		p->from.offset = di->value;
+		p->from.sym->type = SDATA;
+		if(curtext == P) {
+			diag("DYNT not in text: %P", p);
+			break;
+		}
+		p->to.sym = curtext->from.sym;
+		p->to.type = D_CONST;
+		p->link = datap;
+		datap = p;
+		break;
+
+	case AINIT:
+		if(p->from.sym == S) {
+			diag("INIT without a sym\n%P", p);
+			break;
+		}
+		if(di == S) {
+			diag("INIT without previous DYNT\n%P", p);
+			break;
+		}
+		p->from.offset = di->value;
+		p->from.sym->type = SDATA;
+		p->link = datap;
+		datap = p;
+		break;
+	
+	case ADATA:
+		if(p->from.sym == S) {
+			diag("DATA without a sym\n%P", p);
+			break;
+		}
+		p->link = datap;
+		datap = p;
+		break;
+
+	case AGOK:
+		diag("unknown opcode\n%P", p);
+		p->pc = pc;
+		pc++;
+		break;
+
+	case ATEXT:
+		if(curtext != P) {
+			histtoauto();
+			curtext->to.autom = curauto;
+			curauto = 0;
+		}
+		skip = 0;
+		curtext = p;
+		autosize = p->to.offset;
+		if(autosize < 0)
+			autosize = -ptrsize;
+		else if(autosize != 0){
+			autosize = (autosize + 3) & ~3;
+			if(thechar == 'j'){
+				if((autosize & 4) != 0)
+					autosize += 4;
+			}else{
+				if((autosize & 4) == 0)
+					autosize += 4;
+			}
+		}
+		p->to.offset = autosize;
+		s = p->from.sym;
+		if(s == S) {
+			diag("TEXT must have a name\n%P", p);
+			errorexit();
+		}
+		if(s->type != 0 && s->type != SXREF) {
+			if(p->reg & DUPOK) {
+				skip = 1;
+				goto casedef;
+			}
+			diag("redefinition: %s\n%P", s->name, p);
+		}
+		s->type = STEXT;
+		s->value = pc;
+		lastp->link = p;
+		lastp = p;
+		p->pc = pc;
+		pc++;
+		if(textp == P) {
+			textp = p;
+			etextp = p;
+			goto loop;
+		}
+		etextp->cond = p;
+		etextp = p;
+		break;
+
+	case ASUB:
+	case ASUBW:
+		if(p->from.type == D_CONST)
+		if(p->from.name == D_NONE) {
+			p->from.offset = -p->from.offset;
+			p->as = o == ASUB ? AADD : AADDW;
+		}
+		goto casedef;
+
+	case AMOVF:
+		if(skip)
+			goto casedef;
+
+		if(p->from.type == D_FCONST) {
+			/* size sb 9 max */
+			sprint(literal, "$%lux", ieeedtof(p->from.ieee));
+			s = lookup(literal, 0);
+			if(s->type == 0) {
+				s->type = SBSS;
+				s->value = 4;
+				t = prg();
+				t->as = ADATA;
+				t->line = p->line;
+				t->from.type = D_OREG;
+				t->from.sym = s;
+				t->from.name = D_EXTERN;
+				t->reg = 4;
+				t->to = p->from;
+				t->link = datap;
+				datap = t;
+			}
+			p->from.type = D_OREG;
+			p->from.sym = s;
+			p->from.name = D_EXTERN;
+			p->from.offset = 0;
+		}
+		goto casedef;
+
+	case AMOVD:
+		if(skip)
+			goto casedef;
+
+		if(p->from.type == D_FCONST) {
+			/* size sb 18 max */
+			sprint(literal, "$%lux.%lux",
+				p->from.ieee->l, p->from.ieee->h);
+			s = lookup(literal, 0);
+			if(s->type == 0) {
+				s->type = SBSS;
+				s->value = 8;
+				t = prg();
+				t->as = ADATA;
+				t->line = p->line;
+				t->from.type = D_OREG;
+				t->from.sym = s;
+				t->from.name = D_EXTERN;
+				t->reg = 8;
+				t->to = p->from;
+				t->link = datap;
+				datap = t;
+			}
+			p->from.type = D_OREG;
+			p->from.sym = s;
+			p->from.name = D_EXTERN;
+			p->from.offset = 0;
+		}
+		goto casedef;
+
+	case ABGT:
+	case ABGTU:
+	case ABLE:
+	case ABLEU:
+		if(p->from.type == D_REG){
+			p->as = relrev(p->as);
+			if(p->reg == NREG)
+				p->reg = REGZERO;
+			else{
+				r = p->from.reg;
+				p->from.reg = p->reg;
+				p->reg = r;
+			}
+		}
+		goto casedef;
+
+	case ASGT:
+	case ASGTU:
+		r = p->from.reg;
+		p->from.reg = p->reg;
+		p->reg = r;
+		p->as = p->as == ASGT ? ASLT : ASLTU;
+		goto casedef;
+
+	case AMOV:
+		if(p->from.type == D_CONST &&
+		   p->from.name == D_NONE &&
+		   p->from.reg != NREG &&
+		   p->from.reg != REGZERO){
+			p->as = AADD;
+			p->reg = p->from.reg;
+			p->from.reg = NREG;
+		}
+		goto casedef;
+
+/*
+	case AMUL:
+	case AMULXSS:
+	case AMULXSU:
+	case AMULXUU:
+		if(!debug['m'])
+			goto casedef;
+		if(o != AMUL || p->from.type != D_REG){
+			diag("unsupported multiply operation");
+			if(!debug['v'])
+				prasm(p);
+			break;
+		}
+		print("transforming multiply");
+		prasm(p);
+		if(p->reg == NREG)
+			p->reg = p->to.reg;
+		p->as = ACUSTOM;
+		p->from.type = D_CONST;
+		p->from.name = D_NONE;
+		p->from.offset = 0;
+		p->to.type = D_CONST;
+		p->to.name = D_NONE;
+		p->to.offset = p->from.reg<<16 | p->reg<<8 | p->to.reg;
+		p->from.reg = NREG;
+		p->to.reg = NREG;
+		prasm(p);
+		goto casedef;
+*/
+
+	default:
+	casedef:
+		if(skip)
+			nopout(p);
+
+		if(p->to.type == D_BRANCH)
+			p->to.offset += ipc;
+		lastp->link = p;
+		lastp = p;
+		p->pc = pc;
+		pc++;
+		break;
+	}
+	goto loop;
+
+eof:
+	diag("truncated object file: %s", pn);
+}
+
+Sym*
+lookup(char *symb, int v)
+{
+	Sym *s;
+	char *p;
+	long h;
+	int c, l;
+
+	h = v;
+	for(p=symb; c = *p; p++)
+		h = h+h+h + c;
+	l = (p - symb) + 1;
+	if(h < 0)
+		h = ~h;
+	h %= NHASH;
+	for(s = hash[h]; s != S; s = s->link)
+		if(s->version == v)
+		if(memcmp(s->name, symb, l) == 0)
+			return s;
+
+	while(nhunk < sizeof(Sym))
+		gethunk();
+	s = (Sym*)hunk;
+	nhunk -= sizeof(Sym);
+	hunk += sizeof(Sym);
+
+	s->name = malloc(l);
+	memmove(s->name, symb, l);
+
+	s->link = hash[h];
+	s->type = 0;
+	s->version = v;
+	s->value = 0;
+	s->sig = 0;
+	hash[h] = s;
+	return s;
+}
+
+Prog*
+prg(void)
+{
+	Prog *p;
+
+	while(nhunk < sizeof(Prog))
+		gethunk();
+	p = (Prog*)hunk;
+	nhunk -= sizeof(Prog);
+	hunk += sizeof(Prog);
+
+	*p = zprg;
+	return p;
+}
+
+void
+gethunk(void)
+{
+	char *h;
+	long nh;
+
+	nh = NHUNK;
+	if(thunk >= 5L*NHUNK) {
+		nh = 5L*NHUNK;
+		if(thunk >= 25L*NHUNK)
+			nh = 25L*NHUNK;
+	}
+	h = mysbrk(nh);
+	if(h == (char*)-1) {
+		diag("out of memory");
+		errorexit();
+	}
+	hunk = h;
+	nhunk = nh;
+	thunk += nh;
+}
+
+void
+doprof1(void)
+{
+	Sym *s;
+	long n;
+	Prog *p, *q;
+
+	if(debug['v'])
+		Bprint(&bso, "%5.2f profile 1\n", cputime());
+	Bflush(&bso);
+	s = lookup("__mcount", 0);
+	n = 1;
+	for(p = firstp->link; p != P; p = p->link) {
+		if(p->as == ATEXT) {
+			q = prg();
+			q->line = p->line;
+			q->link = datap;
+			datap = q;
+			q->as = ADATA;
+			q->from.type = D_OREG;
+			q->from.name = D_EXTERN;
+			q->from.offset = n*4;
+			q->from.sym = s;
+			q->reg = 4;
+			q->to = p->from;
+			q->to.type = D_CONST;
+
+			q = prg();
+			q->line = p->line;
+			q->pc = p->pc;
+			q->link = p->link;
+			p->link = q;
+			p = q;
+			p->as = AMOVW;
+			p->from.type = D_OREG;
+			p->from.name = D_EXTERN;
+			p->from.sym = s;
+			p->from.offset = n*4 + 4;
+			p->to.type = D_REG;
+			p->to.reg = REGTMP;
+
+			q = prg();
+			q->line = p->line;
+			q->pc = p->pc;
+			q->link = p->link;
+			p->link = q;
+			p = q;
+			p->as = AADD;
+			p->from.type = D_CONST;
+			p->from.offset = 1;
+			p->to.type = D_REG;
+			p->to.reg = REGTMP;
+
+			q = prg();
+			q->line = p->line;
+			q->pc = p->pc;
+			q->link = p->link;
+			p->link = q;
+			p = q;
+			p->as = AMOVW;
+			p->from.type = D_REG;
+			p->from.reg = REGTMP;
+			p->to.type = D_OREG;
+			p->to.name = D_EXTERN;
+			p->to.sym = s;
+			p->to.offset = n*4 + 4;
+
+			n += 2;
+			continue;
+		}
+	}
+	q = prg();
+	q->line = 0;
+	q->link = datap;
+	datap = q;
+
+	q->as = ADATA;
+	q->from.type = D_OREG;
+	q->from.name = D_EXTERN;
+	q->from.sym = s;
+	q->reg = 4;
+	q->to.type = D_CONST;
+	q->to.offset = n;
+
+	s->type = SBSS;
+	s->value = n*4;
+}
+
+void
+doprof2(void)
+{
+	Sym *s2, *s4;
+	Prog *p, *q, *q2, *ps2, *ps4;
+
+	if(debug['v'])
+		Bprint(&bso, "%5.2f profile 2\n", cputime());
+	Bflush(&bso);
+
+	if(debug['e']){
+		s2 = lookup("_tracein", 0);
+		s4 = lookup("_traceout", 0);
+	}else{
+		s2 = lookup("_profin", 0);
+		s4 = lookup("_profout", 0);
+	}
+	if(s2->type != STEXT || s4->type != STEXT) {
+		if(debug['e'])
+			diag("_tracein/_traceout not defined %d %d", s2->type, s4->type);
+		else
+			diag("_profin/_profout not defined");
+		return;
+	}
+
+	ps2 = P;
+	ps4 = P;
+	for(p = firstp; p != P; p = p->link) {
+		if(p->as == ATEXT) {
+			if(p->from.sym == s2) {
+				ps2 = p;
+				p->reg = 1;
+			}
+			if(p->from.sym == s4) {
+				ps4 = p;
+				p->reg = 1;
+			}
+		}
+	}
+	for(p = firstp; p != P; p = p->link) {
+		if(p->as == ATEXT) {
+			if(p->reg & NOPROF) {
+				for(;;) {
+					q = p->link;
+					if(q == P)
+						break;
+					if(q->as == ATEXT)
+						break;
+					p = q;
+				}
+				continue;
+			}
+
+			/*
+			 * CALL	profin, R2
+			 */
+			q = prg();
+			q->line = p->line;
+			q->pc = p->pc;
+			q->link = p->link;
+			if(debug['e']){		/* embedded tracing */
+				q2 = prg();
+				p->link = q2;
+				q2->link = q;
+
+				q2->line = p->line;
+				q2->pc = p->pc;
+
+				q2->as = AJMP;
+				q2->to.type = D_BRANCH;
+				q2->to.sym = p->to.sym;
+				q2->cond = q->link;
+			}else
+				p->link = q;
+			p = q;
+			p->as = AJAL;
+			p->to.type = D_BRANCH;
+			p->cond = ps2;
+			p->to.sym = s2;
+
+			continue;
+		}
+		if(p->as == ARET) {
+			/*
+			 * RET (default)
+			 */
+			if(debug['e']){		/* embedded tracing */
+				q = prg();
+				q->line = p->line;
+				q->pc = p->pc;
+				q->link = p->link;
+				p->link = q;
+				p = q;
+			}
+			/*
+			 * RET
+			 */
+			q = prg();
+			q->as = ARET;
+			q->from = p->from;
+			q->to = p->to;
+			q->link = p->link;
+			p->link = q;
+
+			/*
+			 * CALL	profout
+			 */
+			p->as = AJAL;
+			p->from = zprg.from;
+			p->to = zprg.to;
+			p->to.type = D_BRANCH;
+			p->cond = ps4;
+			p->to.sym = s4;
+
+			p = q;
+
+			continue;
+		}
+	}
+}
+
+void
+nuxiinit(void)
+{
+	int i, c;
+
+	for(i=0; i<4; i++){
+		c = find1(0x04030201L, i+1);
+		if(i < 2)
+			inuxi2[i] = c;
+		if(i < 1)
+			inuxi1[i] = c;
+		inuxi4[i] = c;
+		inuxi8[i] = c;
+		inuxi8[i+4] = c+4;
+		fnuxi4[i] = c;
+		fnuxi8[i] = c;
+		fnuxi8[i+4] = c+4;
+	}
+	if(debug['v']) {
+		Bprint(&bso, "inuxi = ");
+		for(i=0; i<1; i++)
+			Bprint(&bso, "%d", inuxi1[i]);
+		Bprint(&bso, " ");
+		for(i=0; i<2; i++)
+			Bprint(&bso, "%d", inuxi2[i]);
+		Bprint(&bso, " ");
+		for(i=0; i<4; i++)
+			Bprint(&bso, "%d", inuxi4[i]);
+		Bprint(&bso, " ");
+		for(i=0; i<8; i++)
+			Bprint(&bso, "%d", inuxi8[i]);
+		Bprint(&bso, "\nfnuxi = ");
+		for(i=0; i<8; i++)
+			Bprint(&bso, "%d", fnuxi8[i]);
+		Bprint(&bso, "\n");
+	}
+	Bflush(&bso);
+}
+
+int
+find1(long l, int c)
+{
+	char *p;
+	int i;
+
+	p = (char*)&l;
+	for(i=0; i<4; i++)
+		if(*p++ == c)
+			return i;
+	return 0;
+}
+
+long
+ieeedtof(Ieee *ieeep)
+{
+	int exp;
+	long v;
+
+	if(ieeep->h == 0)
+		return 0;
+	exp = (ieeep->h>>20) & ((1L<<11)-1L);
+	exp -= (1L<<10) - 2L;
+	v = (ieeep->h & 0xfffffL) << 3;
+	v |= (ieeep->l >> 29) & 0x7L;
+	if((ieeep->l >> 28) & 1) {
+		v++;
+		if(v & 0x800000L) {
+			v = (v & 0x7fffffL) >> 1;
+			exp++;
+		}
+	}
+	if(exp <= -126 || exp >= 130)
+		diag("double fp to single fp overflow");
+	v |= ((exp + 126) & 0xffL) << 23;
+	v |= ieeep->h & 0x80000000L;
+	return v;
+}
+
+double
+ieeedtod(Ieee *ieeep)
+{
+	Ieee e;
+	double fr;
+	int exp;
+
+	if(ieeep->h & (1L<<31)) {
+		e.h = ieeep->h & ~(1L<<31);
+		e.l = ieeep->l;
+		return -ieeedtod(&e);
+	}
+	if(ieeep->l == 0 && ieeep->h == 0)
+		return 0;
+	fr = ieeep->l & ((1L<<16)-1L);
+	fr /= 1L<<16;
+	fr += (ieeep->l>>16) & ((1L<<16)-1L);
+	fr /= 1L<<16;
+	fr += (ieeep->h & (1L<<20)-1L) | (1L<<20);
+	fr /= 1L<<21;
+	exp = (ieeep->h>>20) & ((1L<<11)-1L);
+	exp -= (1L<<10) - 2L;
+	return ldexp(fr, exp);
+}
diff --git a/utils/il/optab.c b/utils/il/optab.c
new file mode 100644
index 00000000..1bf79169
--- /dev/null
+++ b/utils/il/optab.c
@@ -0,0 +1,194 @@
+#include	"l.h"
+
+Optab	optab[] =
+{
+ /* add		*/	AADD,		C_REG,		C_REG,		0,1,	4,	OOP,		0,	0,
+ /* sub		*/	ASUB,		C_REG,		C_REG,		0,5,	4,	OOP,		0,	0x20,
+ /* sll		*/	ASLL,		C_REG,		C_REG,		0,0,	4,	OOP,		1,	0,
+ /* slt		*/	ASLT,		C_REG,		C_REG,		0,0,	4,	OOP,		2,	0,
+ /* sltu	*/	ASLTU,		C_REG,		C_REG,		0,0,	4,	OOP,		3,	0,
+ /* xor		*/	AXOR,		C_REG,		C_REG,		0,5,	4,	OOP,		4,	0,
+ /* srl		*/	ASRL,		C_REG,		C_REG,		0,0,	4,	OOP,		5,	0,
+ /* sra		*/	ASRA,		C_REG,		C_REG,		0,0,	4,	OOP,		5,	0x20,
+ /* or		*/	AOR,		C_REG,		C_REG,		0,5,	4,	OOP,		6,	0,
+ /* and		*/	AAND,		C_REG,		C_REG,		0,5,	4,	OOP,		7,	0,
+ /* mul		*/	AMUL,		C_REG,		C_REG,		0,0,	4,	OOP,		0,	0x01,
+ /* mulh	*/	AMULH,		C_REG,		C_REG,		0,0,	4,	OOP,		1,	0x01,
+ /* mulhsu	*/	AMULHSU,	C_REG,		C_REG,		0,0,	4,	OOP,		2,	0x01,
+ /* mulhu	*/	AMULHU,		C_REG,		C_REG,		0,0,	4,	OOP,		3,	0x01,
+ /* div		*/	ADIV,		C_REG,		C_REG,		0,0,	4,	OOP,		4,	0x01,
+ /* divu	*/	ADIVU,		C_REG,		C_REG,		0,0,	4,	OOP,		5,	0x01,
+ /* rem		*/	AREM,		C_REG,		C_REG,		0,0,	4,	OOP,		6,	0x01,
+ /* remu	*/	AREMU,		C_REG,		C_REG,		0,0,	4,	OOP,		7,	0x01,
+
+ /* addw	*/	AADDW,		C_REG,		C_REG,		0,22,	4,	OOP_32,		0,	0,
+ /* subw	*/	ASUBW,		C_REG,		C_REG,		0,22,	4,	OOP_32,		0,	0x20,
+ /* sllw	*/	ASLLW,		C_REG,		C_REG,		0,0,	4,	OOP_32,		1,	0,
+ /* srlw	*/	ASRLW,		C_REG,		C_REG,		0,0,	4,	OOP_32,		5,	0,
+ /* sraw	*/	ASRAW,		C_REG,		C_REG,		0,0,	4,	OOP_32,		5,	0x20,
+
+ /* mulw	*/	AMULW,		C_REG,		C_REG,		0,0,	4,	OOP_32,		0,	0x01,
+ /* divw	*/	ADIVW,		C_REG,		C_REG,		0,0,	4,	OOP_32,		4,	0x01,
+ /* divuw	*/	ADIVUW,		C_REG,		C_REG,		0,0,	4,	OOP_32,		5,	0x01,
+ /* remw	*/	AREMW,		C_REG,		C_REG,		0,0,	4,	OOP_32,		6,	0x01,
+ /* remuw	*/	AREMUW,		C_REG,		C_REG,		0,0,	4,	OOP_32,		7,	0x01,
+
+ /* slli	*/	ASLL,		C_SCON,		C_REG,		1,8,	4,	OOP_IMM,	1,	0,
+ /* srli	*/	ASRL,		C_SCON,		C_REG,		1,9,	4,	OOP_IMM,	5,	0,
+ /* srai	*/	ASRA,		C_SCON,		C_REG,		1,9,	4,	OOP_IMM,	5,	0x20,
+
+ /* addi	*/	AADD,		C_SCON,		C_REG,		2,10,	4,	OOP_IMM,	0,	0,
+ /* slti	*/	ASLT,		C_SCON,		C_REG,		2,0,	4,	OOP_IMM,	2,	0,
+ /* sltiu	*/	ASLTU,		C_SCON,		C_REG,		2,0,	4,	OOP_IMM,	3,	0,
+ /* xori	*/	AXOR,		C_SCON,		C_REG,		2,0,	4,	OOP_IMM,	4,	0,
+ /* ori		*/	AOR,		C_SCON,		C_REG,		2,0,	4,	OOP_IMM,	6,	0,
+ /* andi	*/	AAND,		C_SCON,		C_REG,		2,13,	4,	OOP_IMM,	7,	0,
+
+ /* addiw	*/	AADDW,		C_SCON,		C_REG,		2,23,	4,	OOP_IMM_32,	0,	0,
+ /* slliw	*/	ASLLW,		C_SCON,		C_REG,		2,0,	4,	OOP_IMM_32,	1,	0,
+ /* srliw	*/	ASRLW,		C_SCON,		C_REG,		2,0,	4,	OOP_IMM_32,	5,	0,
+ /* sraiw	*/	ASRAW,		C_SCON,		C_REG,		2,0,	4,	OOP_IMM_32,	5,	0x20,
+
+ /* beq		*/	ABEQ,		C_REG,		C_SBRA,		3,14,	4,	OBRANCH,	0,	0,
+ /* bne		*/	ABNE,		C_REG,		C_SBRA,		3,15,	4,	OBRANCH,	1,	0,
+ /* blt		*/	ABLT,		C_REG,		C_SBRA,		3,0,	4,	OBRANCH,	4,	0,
+ /* bge		*/	ABGE,		C_REG,		C_SBRA,		3,0,	4,	OBRANCH,	5,	0,
+ /* bltu	*/	ABLTU,		C_REG,		C_SBRA,		3,0,	4,	OBRANCH,	6,	0,
+ /* bgeu	*/	ABGEU,		C_REG,		C_SBRA,		3,0,	4,	OBRANCH,	7,	0,
+
+ /* jal		*/	AJAL,		C_NONE,		C_SBRA,		4,11,	4,	OJAL,		0,	REGLINK,
+ /* jal		*/	AJMP,		C_NONE,		C_SBRA,		4,12,	4,	OJAL,		0,	REGZERO,
+ /* jal		*/	AJAL,		C_NONE,		C_LBRA,		18,0,	8,	OJALR,		0,	REGLINK,
+ /* jal		*/	AJMP,		C_NONE,		C_LBRA,		18,0,	8,	OJALR,		0,	REGZERO,
+ /* jalr	*/	AJAL,		C_NONE,		C_SOREG,	5,3,	4,	OJALR,		0,	REGLINK,
+ /* jalr	*/	AJMP,		C_NONE,		C_SOREG,	5,4,	4,	OJALR,		0,	REGZERO,
+
+ /* sb		*/	AMOVB,		C_ZREG,		C_SOREG,	6,0,	4,	OSTORE,		0,	0,
+ /* sb		*/	AMOVBU,		C_ZREG,		C_SOREG,	6,0,	4,	OSTORE,		0,	0,
+ /* sh		*/	AMOVH,		C_ZREG,		C_SOREG,	6,0,	4,	OSTORE,		1,	0,
+ /* sw		*/	AMOVW,		C_ZREG,		C_SOREG,	6,19,	4,	OSTORE,		2,	0,
+ /* sd		*/	AMOV,		C_ZREG,		C_SOREG,	6,25,	4,	OSTORE,		3,	0,
+ /* fsw 	*/	AMOVF,		C_FREG,		C_SOREG,	6,20,	4,	OSTORE_FP,	2,	0,
+ /* fsd 	*/	AMOVD,		C_FREG,		C_SOREG,	6,21,	4,	OSTORE_FP,	3,	0,
+
+ /* sb		*/	AMOVB,		C_ZREG,		C_LEXT,		12,0,	8,	OSTORE,		0,	0,
+ /* sb		*/	AMOVBU,		C_ZREG,		C_LEXT,		12,0,	8,	OSTORE,		0,	0,
+ /* sh		*/	AMOVH,		C_ZREG,		C_LEXT,		12,0,	8,	OSTORE,		1,	0,
+ /* sw		*/	AMOVW,		C_ZREG,		C_LEXT,		12,0,	8,	OSTORE,		2,	0,
+ /* sd		*/	AMOV,		C_ZREG,		C_LEXT,		12,0,	8,	OSTORE,		3,	0,
+ /* fsw 	*/	AMOVF,		C_FREG,		C_LEXT,		12,0,	8,	OSTORE_FP,	2,	0,
+ /* fsd 	*/	AMOVD,		C_FREG,		C_LEXT,		12,0,	8,	OSTORE_FP,	3,	0,
+			
+ /* sb		*/	AMOVB,		C_ZREG,		C_LOREG,	15,0,	12,	OSTORE,		0,	0,
+ /* sb		*/	AMOVBU,		C_ZREG,		C_LOREG,	15,0,	12,	OSTORE,		0,	0,
+ /* sh		*/	AMOVH,		C_ZREG,		C_LOREG,	15,0,	12,	OSTORE,		1,	0,
+ /* sw		*/	AMOVW,		C_ZREG,		C_LOREG,	15,0,	12,	OSTORE,		2,	0,
+ /* sd		*/	AMOV,		C_ZREG,		C_LOREG,	15,0,	12,	OSTORE,		3,	0,
+ /* fsw 	*/	AMOVF,		C_FREG,		C_LOREG,	15,0,	12,	OSTORE_FP,	2,	0,
+ /* fsd 	*/	AMOVD,		C_FREG,		C_LOREG,	15,0,	12,	OSTORE_FP,	3,	0,
+
+ /* lb		*/	AMOVB,		C_SOREG,	C_REG,		7,0,	4,	OLOAD,		0,	0,
+ /* lh		*/	AMOVH,		C_SOREG,	C_REG,		7,0,	4,	OLOAD,		1,	0,
+ /* lw		*/	AMOVW,		C_SOREG,	C_REG,		7,16,	4,	OLOAD,		2,	0,
+ /* ld		*/	AMOV,		C_SOREG,	C_REG,		7,24,	4,	OLOAD,		3,	0,
+ /* lbu		*/	AMOVBU,		C_SOREG,	C_REG,		7,0,	4,	OLOAD,		4,	0,
+ /* lhu		*/	AMOVHU,		C_SOREG,	C_REG,		7,0,	4,	OLOAD,		5,	0,
+ /* lwu		*/	AMOVWU,		C_SOREG,	C_REG,		7,0,	4,	OLOAD,		6,	0,
+ /* flw		*/	AMOVF,		C_SOREG,	C_FREG,		7,17,	4,	OLOAD_FP,	2,	0,
+ /* fld		*/	AMOVD,		C_SOREG,	C_FREG,		7,18,	4,	OLOAD_FP,	3,	0,
+
+ /* lui		*/	AMOV,		C_UCON,		C_REG,		8,7,	4,	OLUI,		0,	0,
+
+ /* lb		*/	AMOVB,		C_LEXT,		C_REG,		13,0,	8,	OLOAD,		0,	0,
+ /* lh		*/	AMOVH,		C_LEXT,		C_REG,		13,0,	8,	OLOAD,		1,	0,
+ /* lw		*/	AMOVW,		C_LEXT,		C_REG,		13,0,	8,	OLOAD,		2,	0,
+ /* ld		*/	AMOV,		C_LEXT,		C_REG,		13,0,	8,	OLOAD,		3,	0,
+ /* lbu		*/	AMOVBU,		C_LEXT,		C_REG,		13,0,	8,	OLOAD,		4,	0,
+ /* lhu		*/	AMOVHU,		C_LEXT,		C_REG,		13,0,	8,	OLOAD,		5,	0,
+ /* lwu		*/	AMOVWU,		C_LEXT,		C_REG,		13,0,	8,	OLOAD,		6,	0,
+ /* flw		*/	AMOVF,		C_LEXT,		C_FREG,		13,0,	8,	OLOAD_FP,	2,	0,
+ /* fld		*/	AMOVD,		C_LEXT,		C_FREG,		13,0,	8,	OLOAD_FP,	3,	0,
+
+ /* lb		*/	AMOVB,		C_LOREG,	C_REG,		16,0,	12,	OLOAD,		0,	0,
+ /* lh		*/	AMOVH,		C_LOREG,	C_REG,		16,0,	12,	OLOAD,		1,	0,
+ /* lw		*/	AMOVW,		C_LOREG,	C_REG,		16,0,	12,	OLOAD,		2,	0,
+ /* ld		*/	AMOV,		C_LOREG,	C_REG,		16,0,	12,	OLOAD,		3,	0,
+ /* lbu		*/	AMOVBU,		C_LOREG,	C_REG,		16,0,	12,	OLOAD,		4,	0,
+ /* lhu		*/	AMOVHU,		C_LOREG,	C_REG,		16,0,	12,	OLOAD,		5,	0,
+ /* lwu		*/	AMOVWU,		C_LOREG,	C_REG,		16,0,	12,	OLOAD,		6,	0,
+ /* flw		*/	AMOVF,		C_LOREG,	C_FREG,		16,0,	12,	OLOAD_FP,	2,	0,
+ /* fld		*/	AMOVD,		C_LOREG,	C_FREG,		16,0,	12,	OLOAD_FP,	3,	0,
+
+ /* addi	*/	AMOVW,		C_SCON,		C_REG,		11,6,	4,	OOP_IMM,	0,	0,
+ /* addi	*/	AMOVW,		C_SECON,	C_REG,		11,0,	4,	OOP_IMM,	0,	0,
+ /* addi	*/	AMOVW,		C_SACON,	C_REG,		11,0,	4,	OOP_IMM,	0,	0,
+ /* lui,addi	*/	AMOVW,		C_LCON,		C_REG,		9,0,	8,	OOP_IMM,	0,	0,
+ /* lui,addi	*/	AMOVW,		C_LECON,	C_REG,		9,0,	8,	OOP_IMM,	0,	0,
+ /* ",",add	*/	AMOVW,		C_LACON,	C_REG,		14,0,	12,	OOP_IMM,	0,	0,
+
+ /* add		*/	AMOV,		C_REG,		C_REG,		0,2,	4,	OOP,		0,	0,
+ /* addi	*/	AMOV,		C_SCON,		C_REG,		11,6,	4,	OOP_IMM,	0,	0,
+ /* addi	*/	AMOV,		C_SECON,	C_REG,		11,0,	4,	OOP_IMM,	0,	0,
+ /* addi	*/	AMOV,		C_SACON,	C_REG,		11,0,	4,	OOP_IMM,	0,	0,
+ /* lui,addi	*/	AMOV,		C_LCON,		C_REG,		9,0,	8,	OOP_IMM,	0,	0,
+ /* lui,addi	*/	AMOV,		C_LECON,	C_REG,		20,0,	8,	OOP_IMM,	0,	0,
+ /* lui,s[rl]ai */	AMOV,		C_VCON,		C_REG,		21,0,	8,	OOP_IMM,	5,	0x20,
+ /* ",",add	*/	AMOV,		C_LACON,	C_REG,		14,0,	12,	OOP_IMM,	0,	0,
+ /* ",",add	*/	AADD,		C_LCON,		C_REG,		14,0,	12,	OOP_IMM,	0,	0,
+ /* ",",and	*/	AAND,		C_LCON,		C_REG,		14,0,	12,	OOP_IMM,	7,	0,
+ /* ",",or	*/	AOR,		C_LCON,		C_REG,		14,0,	12,	OOP_IMM,	6,	0,
+ /* ",",xor	*/	AXOR,		C_LCON,		C_REG,		14,0,	12,	OOP_IMM,	4,	0,
+
+ /* addiw	*/	AMOVW,		C_REG,		C_REG,		19,23,	4,	OOP_IMM_32,	0,	0,
+ /* andi	*/	AMOVBU,		C_ZREG,		C_REG,		10,0,	4,	OOP_IMM,	7,	0xFF,
+ /* slli,srli	*/	AMOVHU,		C_ZREG,		C_REG,		10,0,	8,	OOP_IMM,	5,	16,
+ /* slli,srli	*/	AMOVWU,		C_ZREG,		C_REG,		10,0,	8,	OOP_IMM,	5,	0,
+ /* slli,srai	*/	AMOVB,		C_ZREG,		C_REG,		10,0,	8,	OOP_IMM,	5,	24+(0x20<<5),
+ /* slli,srai	*/	AMOVH,		C_ZREG,		C_REG,		10,0,	8,	OOP_IMM,	5,	16+(0x20<<5),
+
+			ASYS,		C_NONE,		C_SCON,		24,0,	4,	OSYSTEM,	0,	0,
+			ACSRRW,		C_CTLREG,	C_REG,		22,0,	4,	OSYSTEM,	1,	0,
+			ACSRRS,		C_CTLREG,	C_REG,		22,0,	4,	OSYSTEM,	2,	0,
+			ACSRRC,		C_CTLREG,	C_REG,		22,0,	4,	OSYSTEM,	3,	0,
+			ACSRRWI,	C_CTLREG,	C_REG,		22,0,	4,	OSYSTEM,	5,	0,
+			ACSRRSI,	C_CTLREG,	C_REG,		22,0,	4,	OSYSTEM,	6,	0,
+			ACSRRCI,	C_CTLREG,	C_REG,		22,0,	4,	OSYSTEM,	7,	0,
+
+			AADDF,		C_FREG,		C_FREG,		0,0,	4,	OOP_FP,		0x7,	0x00,
+			ASUBF,		C_FREG,		C_FREG,		0,0,	4,	OOP_FP,		0x7,	0x04,
+			AMULF,		C_FREG,		C_FREG,		0,0,	4,	OOP_FP,		0x7,	0x08,
+			ADIVF,		C_FREG,		C_FREG,		0,0,	4,	OOP_FP,		0x7,	0x0c,
+			AADDD,		C_FREG,		C_FREG,		0,0,	4,	OOP_FP,		0x7,	0x01,
+			ASUBD,		C_FREG,		C_FREG,		0,0,	4,	OOP_FP,		0x7,	0x05,
+			AMULD,		C_FREG,		C_FREG,		0,0,	4,	OOP_FP,		0x7,	0x09,
+			ADIVD,		C_FREG,		C_FREG,		0,0,	4,	OOP_FP,		0x7,	0x0d,
+
+			ACMPEQF,	C_FREG,		C_REG,		0,0,	4,	OOP_FP,		0x2,	0x50,
+			ACMPLEF,	C_FREG,		C_REG,		0,0,	4,	OOP_FP,		0x0,	0x50,
+			ACMPLTF,	C_FREG,		C_REG,		0,0,	4,	OOP_FP,		0x1,	0x50,
+			ACMPEQD,	C_FREG,		C_REG,		0,0,	4,	OOP_FP,		0x2,	0x51,
+			ACMPLED,	C_FREG,		C_REG,		0,0,	4,	OOP_FP,		0x0,	0x51,
+			ACMPLTD,	C_FREG,		C_REG,		0,0,	4,	OOP_FP,		0x1,	0x51,
+
+ /* float move  */	AMOVF,		C_FREG,		C_FREG,		0,0,	4,	OOP_FP,		0x0,	0x10,
+ /* dbl move    */	AMOVD,		C_FREG,		C_FREG,		0,0,	4,	OOP_FP,		0x0,	0x11,
+
+ /* float->dbl  */	AMOVFD,		C_FREG,		C_FREG,		17,0,	4,	OOP_FP,		0x0,	0x21,
+ /* dbl->float  */	AMOVDF,		C_FREG,		C_FREG,		17,0,	4,	OOP_FP,		0x1,	0x20,
+ /* float->int	*/	AMOVFW,		C_FREG,		C_REG,		17,0,	4,	OOP_FP,		0x0,	0x60,
+ /* dbl->int	*/	AMOVDW,		C_FREG,		C_REG,		17,0,	4,	OOP_FP,		0x0,	0x61,
+ /* int->float	*/	AMOVWF,		C_REG,		C_FREG,		17,0,	4,	OOP_FP,		0x0,	0x68,
+ /* uint->float	*/	AMOVUF,		C_REG,		C_FREG,		17,0,	4,	OOP_FP,		0x1,	0x68,
+ /* int->dbl	*/	AMOVWD,		C_REG,		C_FREG,		17,0,	4,	OOP_FP,		0x0,	0x69,
+ /* uint->dbl	*/	AMOVUD,		C_REG,		C_FREG,		17,0,	4,	OOP_FP,		0x1,	0x69,
+ /* float->vlong*/	AMOVFV,		C_FREG,		C_REG,		17,0,	4,	OOP_FP,		0x2,	0x60,
+ /* dbl->vlong	*/	AMOVDV,		C_FREG,		C_REG,		17,0,	4,	OOP_FP,		0x2,	0x61,
+ /* vlong->float*/	AMOVVF,		C_REG,		C_FREG,		17,0,	4,	OOP_FP,		0x2,	0x68,
+ /* uvlong->float*/	AMOVUVF,	C_REG,		C_FREG,		17,0,	4,	OOP_FP,		0x3,	0x68,
+ /* vlong->dbl	*/	AMOVVD,		C_REG,		C_FREG,		17,0,	4,	OOP_FP,		0x2,	0x69,
+ /* uvlong->dbl	*/	AMOVUVD,	C_REG,		C_FREG,		17,0,	4,	OOP_FP,		0x3,	0x69,
+
+ /* -		*/	AWORD,		C_NONE,		C_LCON,		25,0,	4,	0,		0,	0,
+ /* -		*/	ATEXT,		C_LEXT,		C_LCON,		26,0,	0,	0,		0,	0,
+ /* -		*/	AXXX,		C_NONE,		C_NONE,		0,0,	0,	0,		0,	0,
+};
diff --git a/utils/il/pass.c b/utils/il/pass.c
new file mode 100644
index 00000000..8d3b435b
--- /dev/null
+++ b/utils/il/pass.c
@@ -0,0 +1,589 @@
+#include	"l.h"
+
+void
+dodata(void)
+{
+	int i, t;
+	Sym *s;
+	Prog *p, *p1;
+	long orig, orig1, v;
+	int odd;
+	long long vv;
+
+	if(debug['v'])
+		Bprint(&bso, "%5.2f dodata\n", cputime());
+	Bflush(&bso);
+	for(p = datap; p != P; p = p->link) {
+		s = p->from.sym;
+		if(p->as == ADYNT || p->as == AINIT)
+			s->value = dtype;
+		if(s->type == SBSS)
+			s->type = SDATA;
+		if(s->type != SDATA)
+			diag("initialize non-data (%d): %s\n%P",
+				s->type, s->name, p);
+		v = p->from.offset + p->reg;
+		if(v > s->value)
+			diag("initialize bounds (%ld): %s\n%P",
+				s->value, s->name, p);
+	}
+
+	if(debug['t']) {
+		/*
+		 * pull out string constants
+		 */
+		for(p = datap; p != P; p = p->link) {
+			s = p->from.sym;
+			if(p->to.type == D_SCONST)
+				s->type = SSTRING;
+		}
+	}
+
+	/*
+	 * pass 1
+	 *	assign 'small' variables to data segment
+	 *	(rational is that data segment is more easily
+	 *	 addressed through offset on SB)
+	 */
+	odd = 4;
+	orig = 0;
+	for(i=0; i<NHASH; i++)
+	for(s = hash[i]; s != S; s = s->link) {
+		t = s->type;
+		if(t != SDATA && t != SBSS)
+			continue;
+		v = s->value;
+		if(v == 0) {
+			diag("%s: no size", s->name);
+			v = 1;
+		}
+		while(v & 3)
+			v++;
+		s->value = v;
+		if(v > MINSIZ)
+			continue;
+		if(v >= 8 && (orig & odd) != 0)
+			orig += odd;
+		s->value = orig;
+		orig += v;
+		s->type = SDATA1;
+	}
+	orig1 = orig;
+
+	/*
+	 * pass 2
+	 *	assign 'data' variables to data segment
+	 */
+	for(i=0; i<NHASH; i++)
+	for(s = hash[i]; s != S; s = s->link) {
+		t = s->type;
+		if(t != SDATA) {
+			if(t == SDATA1)
+				s->type = SDATA;
+			continue;
+		}
+		v = s->value;
+		if((orig & odd) != 0)
+			orig += odd;
+		s->value = orig;
+		orig += v;
+		s->type = SDATA1;
+	}
+
+	while(orig & 7)
+		orig++;
+	datsize = orig;
+
+	/*
+	 * pass 3
+	 *	everything else to bss segment
+	 */
+	for(i=0; i<NHASH; i++)
+	for(s = hash[i]; s != S; s = s->link) {
+		if(s->type != SBSS)
+			continue;
+		v = s->value;
+		if((orig & odd) != 0)
+			orig += odd;
+		s->value = orig;
+		orig += v;
+	}
+	while(orig & 7)
+		orig++;
+	bsssize = orig-datsize;
+
+	/*
+	 * pass 4
+	 *	add literals to all large values.
+	 *	at this time:
+	 *		small data is allocated DATA
+	 *		large data is allocated DATA1
+	 *		large bss is allocated BSS
+	 *	the new literals are loaded between
+	 *	small data and large data.
+	 */
+	orig = 0;
+	for(p = firstp; p != P; p = p->link) {
+		if(p->as != AMOV && p->as != AMOVW)
+			continue;
+		if(p->from.type != D_CONST && p->from.type != D_VCONST)
+			continue;
+		if(s = p->from.sym) {
+			if(!debug['r'])
+				continue;
+			t = s->type;
+			if(t != SDATA && t != SDATA1 && t != SBSS)
+				continue;
+			t = p->from.name;
+			if(t != D_EXTERN && t != D_STATIC)
+				continue;
+			v = s->value + p->from.offset;
+			if(v >= 0 && v <= 2*BIG)
+				continue;
+			if(!strcmp(s->name, "setSB"))
+				continue;
+			/* size should be 19 max */
+			if(strlen(s->name) >= 10)	/* has loader address */ 
+				sprint(literal, "$%p.%lux", s, p->from.offset);
+			else
+				sprint(literal, "$%s.%d.%lux", s->name, s->version, p->from.offset);
+		} else {
+			if(p->from.type == D_VCONST){
+				vv = *p->from.vval;
+				if( 0 && (v = vconshift(vv)) >= 0 && !debug['r']){
+					if(v < 12)
+						vv <<= 12 - v;
+					else
+						vv >>= v - 12;
+					p->from.type = D_CONST;
+					p->from.offset = (long)vv & ~0xFFF;
+					p1 = prg();
+					p1->line = p->line;
+					p1->to = p->to;
+					p1->from.type = D_CONST;
+					if(v < 12) {
+						p1->as = ASRA;
+						p1->from.offset = 12 - v;
+					} else {
+						p1->as = ASLL;
+						p1->from.offset = v - 12;
+					}
+					p1->link = p->link;
+					p->link = p1;
+					continue;
+				}
+				sprint(literal, "$%llux", vv);
+			} else {
+				if(!debug['r'])
+					continue;
+				if(p->from.name != D_NONE)
+					continue;
+				if(p->from.reg != NREG)
+					continue;
+				v = p->from.offset;
+				if(v >= -BIG && v < BIG)
+					continue;
+				if((v & (BIG-1)) == 0)
+					continue;
+				/* size should be 9 max */
+				sprint(literal, "$%lux", v);
+			}
+		}
+		s = lookup(literal, 0);
+		if(s->type == 0) {
+			s->type = SDATA;
+			if(p->from.type == D_VCONST && (orig & odd) != 0)
+				orig += odd;
+			s->value = orig1+orig;
+			p1 = prg();
+			p1->line = p->line;
+			p1->as = ADATA;
+			p1->from.type = D_OREG;
+			p1->from.sym = s;
+			p1->from.name = D_EXTERN;
+			p1->reg = p->from.type == D_VCONST ? 8 : 4;
+			p1->to = p->from;
+			p1->link = datap;
+			orig += p1->reg;
+			datap = p1;
+		}
+		if(s->type != SDATA)
+			diag("literal not data: %s", s->name);
+		if(thechar == 'i' && p->as == AMOV)
+			p->as = AMOVW;
+		p->from.type = D_OREG;
+		p->from.sym = s;
+		p->from.name = D_EXTERN;
+		p->from.offset = 0;
+		continue;
+	}
+	while(orig & 7)
+		orig++;
+
+	/*
+	 * pass 5
+	 *	re-adjust offsets
+	 */
+	for(i=0; i<NHASH; i++)
+	for(s = hash[i]; s != S; s = s->link) {
+		t = s->type;
+		if(t == SBSS) {
+			s->value += orig;
+			continue;
+		}
+		if(t == SDATA1) {
+			s->type = SDATA;
+			s->value += orig;
+			continue;
+		}
+	}
+	datsize += orig;
+	xdefine("setSB", SDATA, 0L+BIG);
+	xdefine("bdata", SDATA, 0L);
+	xdefine("edata", SDATA, datsize);
+	xdefine("end", SBSS, datsize+bsssize);
+	xdefine("etext", STEXT, 0L);
+}
+
+void
+undef(void)
+{
+	int i;
+	Sym *s;
+
+	for(i=0; i<NHASH; i++)
+	for(s = hash[i]; s != S; s = s->link)
+		if(s->type == SXREF)
+			diag("%s: not defined", s->name);
+}
+
+int
+relinv(int a)
+{
+
+	switch(a) {
+	case ABEQ:	return ABNE;
+	case ABNE:	return ABEQ;
+
+	case ABLT:	return ABGE;
+	case ABGE:	return ABLT;
+
+	case ABLTU:	return ABGEU;
+	case ABGEU:	return ABLTU;
+	}
+	return 0;
+}
+
+int
+relrev(int a)
+{
+	switch (a) {
+	case ABGT:	return ABLT;
+	case ABGTU:	return ABLTU;
+	case ABLE:	return ABGE;
+	case ABLEU:	return ABGEU;
+	}
+	return 0;
+}
+
+void
+follow(void)
+{
+	if(debug['v'])
+		Bprint(&bso, "%5.2f follow\n", cputime());
+	Bflush(&bso);
+
+	firstp = prg();
+	lastp = firstp;
+	xfol(textp);
+
+	firstp = firstp->link;
+	lastp->link = P;
+}
+
+void
+xfol(Prog *p)
+{
+	Prog *q, *r;
+	int a, b, i;
+
+loop:
+	if(p == P)
+		return;
+	a = p->as;
+	if(a == ATEXT)
+		curtext = p;
+	if(a == AJMP) {
+		q = p->cond;
+		if(q != P) {
+			p->mark |= FOLL;
+			p = q;
+			if(!(p->mark & FOLL))
+				goto loop;
+		}
+	}
+	if(p->mark & FOLL) {
+		for(i=0,q=p; i<4; i++,q=q->link) {
+			if(q == lastp)
+				break;
+			b = 0;		/* set */
+			a = q->as;
+			if(a == ANOP) {
+				i--;
+				continue;
+			}
+			if(a == AJMP || a == ARET)
+				goto copy;
+			if(!q->cond || (q->cond->mark&FOLL))
+				continue;
+			b = relinv(a);
+			if(!b)
+				continue;
+		copy:
+			for(;;) {
+				r = prg();
+				*r = *p;
+				if(!(r->mark&FOLL))
+					print("cant happen 1\n");
+				r->mark |= FOLL;
+				if(p != q) {
+					p = p->link;
+					lastp->link = r;
+					lastp = r;
+					continue;
+				}
+				lastp->link = r;
+				lastp = r;
+				if(a == AJMP || a == ARET)
+					return;
+				r->as = b;
+				r->cond = p->link;
+				r->link = p->cond;
+				if(!(r->link->mark&FOLL))
+					xfol(r->link);
+				if(!(r->cond->mark&FOLL))
+					print("cant happen 2\n");
+				return;
+			}
+		}
+		a = AJMP;
+		q = prg();
+		q->as = a;
+		q->line = p->line;
+		q->to.type = D_BRANCH;
+		q->to.offset = p->pc;
+		q->cond = p;
+		p = q;
+	}
+	p->mark |= FOLL;
+	lastp->link = p;
+	lastp = p;
+	if(a == AJMP || a == ARET){
+		return;
+	}
+	if(p->cond != P)
+	if(a != AJAL && p->link != P) {
+		xfol(p->link);
+		p = p->cond;
+		if(p == P || (p->mark&FOLL))
+			return;
+		goto loop;
+	}
+	p = p->link;
+	goto loop;
+}
+
+void
+patch(void)
+{
+	long c, vexit;
+	Prog *p, *q;
+	Sym *s;
+	int a;
+
+	if(debug['v'])
+		Bprint(&bso, "%5.2f patch\n", cputime());
+	Bflush(&bso);
+	mkfwd();
+	s = lookup("exit", 0);
+	vexit = s->value;
+	for(p = firstp; p != P; p = p->link) {
+		a = p->as;
+		if(a == ATEXT)
+			curtext = p;
+		if((a == AJAL || a == AJMP || a == ARET) &&
+		   p->to.type != D_BRANCH && p->to.sym != S) {
+			s = p->to.sym;
+			if(s->type != STEXT) {
+				diag("undefined: %s\n%P", s->name, p);
+				s->type = STEXT;
+				s->value = vexit;
+			}
+			p->to.offset = s->value;
+			p->to.type = D_BRANCH;
+		}
+		if(p->to.type != D_BRANCH)
+			continue;
+		c = p->to.offset;
+		for(q = firstp; q != P;) {
+			if(q->forwd != P)
+			if(c >= q->forwd->pc) {
+				q = q->forwd;
+				continue;
+			}
+			if(c == q->pc)
+				break;
+			q = q->link;
+		}
+		if(q == P) {
+			diag("branch out of range %ld => %ld\n%P", p->pc, c, p);
+			p->to.type = D_NONE;
+		}
+		p->cond = q;
+	}
+
+	for(p = firstp; p != P; p = p->link) {
+		if(p->as == ATEXT)
+			curtext = p;
+		if(p->cond != P) {
+			p->cond = brloop(p->cond);
+			if(p->cond != P)
+			if(p->to.type == D_BRANCH)
+				p->to.offset = p->cond->pc;
+		}
+	}
+}
+
+#define	LOG	5
+void
+mkfwd(void)
+{
+	Prog *p;
+	long dwn[LOG], cnt[LOG], i;
+	Prog *lst[LOG];
+
+	for(i=0; i<LOG; i++) {
+		if(i == 0)
+			cnt[i] = 1; else
+			cnt[i] = LOG * cnt[i-1];
+		dwn[i] = 1;
+		lst[i] = P;
+	}
+	i = 0;
+	for(p = firstp; p != P; p = p->link) {
+		if(p->as == ATEXT)
+			curtext = p;
+		i--;
+		if(i < 0)
+			i = LOG-1;
+		p->forwd = P;
+		dwn[i]--;
+		if(dwn[i] <= 0) {
+			dwn[i] = cnt[i];
+			if(lst[i] != P)
+				lst[i]->forwd = p;
+			lst[i] = p;
+		}
+	}
+}
+
+Prog*
+brloop(Prog *p)
+{
+	Prog *q;
+	int c;
+
+	for(c=0; p!=P;) {
+		if(p->as != AJMP)
+			return p;
+		q = p->cond;
+		if(q <= p) {
+			c++;
+			if(q == p || c > 5000)
+				break;
+		}
+		p = q;
+	}
+	return P;
+}
+
+xlong
+atolwhex(char *s)
+{
+	xlong n;
+	int f;
+
+	n = 0;
+	f = 0;
+	while(*s == ' ' || *s == '\t')
+		s++;
+	if(*s == '-' || *s == '+') {
+		if(*s++ == '-')
+			f = 1;
+		while(*s == ' ' || *s == '\t')
+			s++;
+	}
+	if(s[0]=='0' && s[1]){
+		if(s[1]=='x' || s[1]=='X'){
+			s += 2;
+			for(;;){
+				if(*s >= '0' && *s <= '9')
+					n = n*16 + *s++ - '0';
+				else if(*s >= 'a' && *s <= 'f')
+					n = n*16 + *s++ - 'a' + 10;
+				else if(*s >= 'A' && *s <= 'F')
+					n = n*16 + *s++ - 'A' + 10;
+				else
+					break;
+			}
+		} else
+			while(*s >= '0' && *s <= '7')
+				n = n*8 + *s++ - '0';
+	} else
+		while(*s >= '0' && *s <= '9')
+			n = n*10 + *s++ - '0';
+	if(f)
+		n = -n;
+	return n;
+}
+
+vlong
+rnd(vlong v, vlong r)
+{
+	vlong c;
+
+	if(r <= 0)
+		return v;
+	v += r - 1;
+	c = v % r;
+	if(c < 0)
+		c += r;
+	v -= c;
+	return v;
+}
+
+int
+vconshift(vlong constant)
+{
+	vlong orig;
+	long w;
+	int shift;
+
+	orig = constant;
+	if(constant == 0)
+		return -1;
+	shift = 12;
+	while((constant & 0xFFF) != 0){
+		shift--;
+		constant <<= 1;
+	}
+	while((constant & 0x1000) == 0){
+		shift++;
+		constant >>= 1;
+	}
+	w = (long)constant;
+	constant = shift > 12? (vlong)w << shift - 12 : (vlong)w >> 12 - shift;
+	if(constant != orig)
+		return -1;
+	return shift;
+}
diff --git a/utils/il/span.c b/utils/il/span.c
new file mode 100644
index 00000000..f54dfdc7
--- /dev/null
+++ b/utils/il/span.c
@@ -0,0 +1,525 @@
+#include	"l.h"
+
+void
+span(void)
+{
+	Prog *p, *q;
+	Sym *setext, *s;
+	Optab *o;
+	int m, bflag, i, spass;
+	long c, otxt, v;
+
+	if(debug['v'])
+		Bprint(&bso, "%5.2f span\n", cputime());
+	Bflush(&bso);
+
+	bflag = 0;
+	c = 0;
+	otxt = c;
+	for(p = firstp; p != P; p = p->link) {
+		if(p->as == ATEXT)
+			c = (c + 3) & ~3;
+		p->pc = c;
+		o = oplook(p);
+		m = o->size;
+		if(!debug['c']){
+			if(o->ctype && asmout(p, o, 2) == 2){
+				bflag = 1;
+				p->mark |= COMPR;
+				m = 2;
+			}
+		}
+		if(m == 0) {
+			if(p->as == ATEXT) {
+				curtext = p;
+				autosize = p->to.offset + ptrsize;
+				if(p->from.sym != S)
+					p->from.sym->value = c;
+				/* need passes to resolve branches */
+				if(c-otxt >= 0x1000)
+					bflag = 1;
+				otxt = c;
+				continue;
+			}
+			diag("zero-width instruction\n%P", p);
+			continue;
+		}
+		c += m;
+	}
+
+	/*
+	 * Multi-pass expansion of span dependent instructions
+	 *   Bcond JAL C.Bcond C.JAL C.JMP
+	 */
+	spass = 0;
+	while(bflag) {
+		if(debug['v'])
+			Bprint(&bso, "%5.2f span1\n", cputime());
+		bflag = 0;
+		spass ^= SPASS;
+		c = 0;
+		for(p = firstp; p != P; p = p->link) {
+			o = oplook(p);
+			m = o->size;
+			if(p->mark&COMPR)
+				m = 2;
+			if((o->type == 3 || o->type == 4) && p->cond) {
+				if((p->cond->mark&SPASS) == spass)
+					p->pc = c;
+				if(m == 2){
+					/*
+					 * If instruction was compressed, check again in case
+					 * branch range is now too large.
+					 */
+					m = asmout(p, o, 3);
+					if(m != 2){
+						p->mark &= ~COMPR;
+						bflag = 1;
+					}
+				}
+				otxt = p->cond->pc - p->pc;
+				if(otxt < 0)
+					otxt = -otxt;
+				if(o->type == 3){
+					/*
+					 * If Bcond branch range exceeds 4K, replace it by the
+					 * logically negated branch around a JMP.
+					*/
+					if(otxt >= 0x1000) {
+						q = prg();
+						q->link = p->link;
+						q->line = p->line;
+						q->as = AJMP;
+						q->to.type = D_BRANCH;
+						q->cond = p->cond;
+						p->link = q;
+						p->as = relinv(p->as);
+						p->cond = q->link;
+						p->optab = 0;
+						o = oplook(p);
+						q->mark = spass ^ SPASS;
+						m = asmout(p, o, 2);
+						if(m == 2)
+							p->mark |= COMPR;
+						q->pc = p->pc + m;
+						bflag = 1;
+					}
+				}else{
+					/*
+					 * If JAL branch range exceeds 1M, change address class
+					 * and recalculate instruction length.
+					 */
+					if(otxt >= 0x100000) {
+						p->to.class = C_LBRA + 1;
+						p->optab = 0;
+						o = oplook(p);
+						m = asmout(p, o, 3);
+						p->mark &= ~COMPR;
+					}
+				}
+			}
+			if(p->as == ATEXT)
+				c = (c + 3) & ~3;
+			p->pc = c;
+			p->mark ^= SPASS;
+			if(m == 0) {
+				if(p->as == ATEXT) {
+					curtext = p;
+					autosize = p->to.offset + ptrsize;
+					if(p->from.sym != S)
+						p->from.sym->value = c;
+					continue;
+				}
+				diag("zero-width instruction\n%P", p);
+				continue;
+			}
+			c += m;
+		}
+	}
+
+	if(debug['t']) {
+		/* 
+		 * add strings to text segment
+		 */
+		c = rnd(c, 8);
+		for(i=0; i<NHASH; i++)
+		for(s = hash[i]; s != S; s = s->link) {
+			if(s->type != SSTRING)
+				continue;
+			v = s->value;
+			while(v & 3)
+				v++;
+			s->value = c;
+			c += v;
+		}
+	}
+
+	c = rnd(c, 8);
+
+	setext = lookup("etext", 0);
+	if(setext != S) {
+		setext->value = c;
+		textsize = c;
+	}
+	if(INITRND)
+		INITDAT = rnd(INITTEXT + c, INITRND);
+	if(debug['v'])
+		Bprint(&bso, "tsize = %lux\n", textsize);
+	Bflush(&bso);
+}
+		
+void
+xdefine(char *p, int t, long v)
+{
+	Sym *s;
+
+	s = lookup(p, 0);
+	if(s->type == 0 || s->type == SXREF) {
+		s->type = t;
+		s->value = v;
+	}
+}
+
+long
+regoff(Adr *a)
+{
+
+	instoffset = 0;
+	a->class = aclass(a) + 1;
+	return instoffset;
+}
+
+int
+classreg(Adr *a)
+{
+	if(a->reg == NREG) {
+		switch(a->class - 1) {
+		case C_SEXT:
+		case C_SECON:
+		case C_LECON:
+			return REGSB;
+		case C_SAUTO:
+		case C_LAUTO:
+		case C_SACON:
+		case C_LACON:
+			return REGSP;
+		}
+	}
+	return a->reg;
+}
+
+int
+aclass(Adr *a)
+{
+	Sym *s;
+	int t;
+
+	switch(a->type) {
+	case D_NONE:
+		return C_NONE;
+
+	case D_REG:
+		return C_REG;
+
+	case D_CTLREG:
+		return C_CTLREG;
+
+	case D_FREG:
+		return C_FREG;
+
+	case D_OREG:
+		switch(a->name) {
+		case D_EXTERN:
+		case D_STATIC:
+			if(a->sym == 0 || a->sym->name == 0) {
+				print("null sym external\n");
+				print("%D\n", a);
+				return C_GOK;
+			}
+			t = a->sym->type;
+			if(t == 0 || t == SXREF) {
+				diag("undefined external: %s in %s",
+					a->sym->name, TNAME);
+				a->sym->type = SDATA;
+			}
+			instoffset = a->sym->value + a->offset - BIG;
+			if(instoffset >= -BIG && instoffset < BIG)
+				return C_SEXT;
+			return C_LEXT;
+		case D_AUTO:
+			instoffset = autosize + a->offset;
+			if(instoffset >= -BIG && instoffset < BIG)
+				return C_SAUTO;
+			return C_LAUTO;
+
+		case D_PARAM:
+			instoffset = autosize + a->offset + ptrsize;
+			if(instoffset >= -BIG && instoffset < BIG)
+				return C_SAUTO;
+			return C_LAUTO;
+		case D_NONE:
+			instoffset = a->offset;
+			if(instoffset == 0)
+				return C_ZOREG;
+			if(instoffset >= -BIG && instoffset < BIG)
+				return C_SOREG;
+			return C_LOREG;
+		}
+		return C_GOK;
+
+	case D_FCONST:
+		return C_FCON;
+
+	case D_VCONST:
+		return C_VCON;
+
+	case D_CONST:
+		switch(a->name) {
+
+		case D_NONE:
+			instoffset = a->offset;
+			if(a->reg != NREG && a->reg != REGZERO){
+				if(instoffset >= -BIG && instoffset < BIG)
+					return C_SRCON;
+				return C_LRCON;
+			}
+		consize:
+			if(instoffset == 0)
+				return C_ZCON;
+			if(instoffset >= -0x800 && instoffset <= 0x7ff)
+				return C_SCON;
+			if((instoffset & 0xfff) == 0)
+				return C_UCON;
+			return C_LCON;
+
+		case D_EXTERN:
+		case D_STATIC:
+			instoffx = 0;
+			s = a->sym;
+			if(s == S)
+				break;
+			t = s->type;
+			switch(t) {
+			case 0:
+			case SXREF:
+				diag("undefined external: %s in %s",
+					s->name, TNAME);
+				s->type = SDATA;
+				break;
+			case SCONST:
+				instoffset = s->value + a->offset;
+				goto consize;
+			case STEXT:
+			case SLEAF:
+			case SSTRING:
+				instoffset = s->value + a->offset;
+				instoffx = INITTEXT;
+				return C_LECON;
+			}
+			instoffset = s->value + a->offset - BIG;
+			if(instoffset >= -BIG && instoffset < BIG && instoffset != 0L)
+				return C_SECON;
+			instoffset = s->value + a->offset;
+			instoffx = INITDAT;
+			return C_LECON;
+
+		case D_AUTO:
+			instoffset = autosize + a->offset;
+			if(instoffset >= -BIG && instoffset < BIG)
+				return C_SACON;
+			return C_LACON;
+
+		case D_PARAM:
+			instoffset = autosize + a->offset + ptrsize;
+			if(instoffset >= -BIG && instoffset < BIG)
+				return C_SACON;
+			return C_LACON;
+		}
+		return C_GOK;
+
+	case D_BRANCH:
+		return C_SBRA;
+	}
+	return C_GOK;
+}
+
+Optab*
+oplook(Prog *p)
+{
+	int a1, a2, a3, r;
+	char *c1, *c3;
+	Optab *o, *e;
+
+	a1 = p->optab;
+	if(a1)
+		return optab+(a1-1);
+	a1 = p->from.class;
+	if(a1 == 0) {
+		a1 = aclass(&p->from) + 1;
+		p->from.class = a1;
+	}
+	a1--;
+	a3 = p->to.class;
+	if(a3 == 0) {
+		a3 = aclass(&p->to) + 1;
+		p->to.class = a3;
+	}
+	a3--;
+	a2 = C_NONE;
+	if(p->reg != NREG)
+		a2 = C_REG;
+	r = p->as;
+	o = oprange[r].start;
+	if(o == 0) {
+		a1 = opcross[repop[r]][a1][a3];
+		if(a1) {
+			p->optab = a1+1;
+			return optab+a1;
+		}
+		o = oprange[r].stop; /* just generate an error */
+		a1 = p->from.class - 1;
+	}
+	e = oprange[r].stop;
+
+	c1 = xcmp[a1];
+	c3 = xcmp[a3];
+	for(; o<e; o++)
+		if(c1[o->a1])
+		if(c3[o->a3]) {
+			p->optab = (o-optab)+1;
+			return o;
+		}
+	diag("illegal combination %A %d %d %d",
+		p->as, a1, a2, a3);
+	if(!debug['a'])
+		prasm(p);
+	o = optab;
+	p->optab = (o-optab)+1;
+	return o;
+}
+
+int
+cmp(int a, int b)
+{
+
+	if(a == b)
+		return 1;
+	switch(a) {
+	case C_LCON:
+		if(b == C_ZCON || b == C_SCON || b == C_UCON)
+			return 1;
+		break;
+	case C_UCON:
+		if(b == C_ZCON)
+			return 1;
+		break;
+	case C_SCON:
+		if(b == C_ZCON)
+			return 1;
+		break;
+	case C_LACON:
+		if(b == C_SACON)
+			return 1;
+		break;
+	case C_LRCON:
+		if(b == C_SRCON)
+			return 1;
+		break;
+	case C_LBRA:
+		if(b == C_SBRA)
+			return 1;
+		break;
+	case C_LEXT:
+		if(b == C_SEXT)
+			return 1;
+		break;
+	case C_LAUTO:
+		if(b == C_SAUTO)
+			return 1;
+		break;
+	case C_ZREG:
+		if(b == C_REG || b == C_ZCON)
+			return 1;
+		break;
+	case C_LOREG:
+		if(b == C_ZOREG || b == C_SOREG || b == C_SAUTO || b == C_LAUTO)
+			return 1;
+		break;
+	case C_SOREG:
+		if(b == C_ZOREG || b == C_SAUTO || b == C_SEXT)
+			return 1;
+		break;
+	}
+	return 0;
+}
+
+int
+ocmp(void *a1, void *a2)
+{
+	Optab *p1, *p2;
+	int n;
+
+	p1 = (Optab*)a1;
+	p2 = (Optab*)a2;
+	n = p1->as - p2->as;
+	if(n)
+		return n;
+	n = p1->a1 - p2->a1;
+	if(n)
+		return n;
+	n = p1->a3 - p2->a3;
+	if(n)
+		return n;
+	return 0;
+}
+
+void
+buildop(void)
+{
+	int i, n, r;
+
+	for(i=0; i<32; i++)
+		for(n=0; n<32; n++)
+			xcmp[i][n] = cmp(n, i);
+	for(n=0; optab[n].as != AXXX; n++)
+		;
+	qsort(optab, n, sizeof(optab[0]), ocmp);
+	for(i=0; i<n; i++) {
+		r = optab[i].as;
+		oprange[r].start = optab+i;
+		while(optab[i].as == r)
+			i++;
+		oprange[r].stop = optab+i;
+		i--;
+	}
+
+	buildrep(1, AMOVW);
+}
+
+void
+buildrep(int x, int as)
+{
+	Opcross *p;
+	Optab *e, *s, *o;
+	int a1, a3, n;
+
+	if(C_GOK >= 32 || x >= nelem(opcross)) {
+		diag("assumptions fail in buildrep");
+		errorexit();
+	}
+	repop[as] = x;
+	p = (opcross + x);
+	s = oprange[as].start;
+	e = oprange[as].stop;
+	for(o=e-1; o>=s; o--) {
+		n = o-optab;
+		for(a1=0; a1<32; a1++) {
+			if(!xcmp[a1][o->a1])
+				continue;
+			for(a3=0; a3<32; a3++)
+				if(xcmp[a3][o->a3])
+					(*p)[a1][a3] = n;
+		}
+	}
+	oprange[as].start = 0;
+}