20060303

1 files changed, 1433 insertions, 0 deletions

diff --git a/utils/0l/asm.c b/utils/0l/asm.c
new file mode 100644
index 00000000..f0ee58bf
--- /dev/null
+++ b/utils/0l/asm.c
@@ -0,0 +1,1433 @@
+#include	"l.h"
+
+long	OFFSET;
+/*
+long	BADOFFSET	=	-1;
+
+		if(OFFSET <= BADOFFSET && OFFSET+4 > BADOFFSET)\
+			abort();\
+		OFFSET += 4;\
+
+		if(OFFSET == BADOFFSET)\
+			abort();\
+		OFFSET++;\
+*/
+
+void
+cput(int c)
+{
+	cbp[0] = c;
+	cbp++;
+	cbc--;
+	if(cbc <= 0)
+		cflush();
+}
+
+void
+bput(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
+lput(long l)
+{
+
+	cbp[0] = l;
+	cbp[1] = l>>8;
+	cbp[2] = l>>16;
+	cbp[3] = l>>24;
+	cbp += 4;
+	cbc -= 4;
+	if(cbc <= 0)
+		cflush();
+}
+
+long
+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;
+}
+
+void
+asmb(void)
+{
+	Prog *p;
+	long t;
+	Optab *o;
+
+	if(debug['v'])
+		Bprint(&bso, "%5.2f asm\n", cputime());
+	Bflush(&bso);
+	OFFSET = HEADR;
+	seek(cout, OFFSET, 0);
+	pc = INITTEXT;
+	for(p = firstp; p != P; p = p->link) {
+		if(p->as == ATEXT) {
+			curtext = p;
+			autosize = p->to.offset + 8;
+		}
+		if(p->pc != pc) {
+			diag("phase error %lux sb %lux\n",
+				p->pc, pc);
+			if(!debug['a'])
+				prasm(curp);
+			pc = p->pc;
+		}
+		curp = p;
+		o = oplook(p);	/* could probably avoid this call */
+		if(asmout(p, o, 0)) {
+			p = p->link;
+			pc += 4;
+		}
+		pc += o->size;
+	}
+	if(debug['a'])
+		Bprint(&bso, "\n");
+	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);
+		else
+			datblk(t, datsize-t);
+	}
+
+	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 0:
+		bput(0x160L<<16);		/* magic and sections */
+		bput(0L);			/* time and date */
+		bput(rnd(HEADR+textsize, 4096)+datsize);
+		bput(symsize);			/* nsyms */
+		bput((0x38L<<16)|7L);		/* size of optional hdr and flags */
+		bput((0413<<16)|0437L);		/* magic and version */
+		bput(rnd(HEADR+textsize, 4096));	/* sizes */
+		bput(datsize);
+		bput(bsssize);
+		bput(entryvalue());		/* va of entry */
+		bput(INITTEXT-HEADR);		/* va of base of text */
+		bput(INITDAT);			/* va of base of data */
+		bput(INITDAT+datsize);		/* va of base of bss */
+		bput(~0L);			/* gp reg mask */
+		bput(0L);
+		bput(0L);
+		bput(0L);
+		bput(0L);
+		bput(~0L);			/* gp value ?? */
+		break;
+	case 1:
+		bput(0x160L<<16);		/* magic and sections */
+		bput(0L);			/* time and date */
+		bput(HEADR+textsize+datsize);
+		bput(symsize);			/* nsyms */
+		bput((0x38L<<16)|7L);		/* size of optional hdr and flags */
+
+		bput((0407<<16)|0437L);		/* magic and version */
+		bput(textsize);			/* sizes */
+		bput(datsize);
+		bput(bsssize);
+		bput(entryvalue());		/* va of entry */
+		bput(INITTEXT);			/* va of base of text */
+		bput(INITDAT);			/* va of base of data */
+		bput(INITDAT+datsize);		/* va of base of bss */
+		bput(~0L);			/* gp reg mask */
+		bput(lcsize);
+		bput(0L);
+		bput(0L);
+		bput(0L);
+		bput(~0L);			/* gp value ?? */
+		bput(0L);			/* complete mystery */
+		break;
+	case 2:
+		t = 22;
+		bput(((((4*t)+0)*t)+7));	/* magic */
+		bput(textsize);			/* sizes */
+		bput(datsize);
+		bput(bsssize);
+		bput(symsize);			/* nsyms */
+		bput(entryvalue());		/* va of entry */
+		bput(0L);
+		bput(lcsize);
+		break;
+	case 3:
+		bput((0x160L<<16)|3L);		/* magic and sections */
+		bput(time(0));			/* time and date */
+		bput(HEADR+textsize+datsize);
+		bput(symsize);			/* nsyms */
+		bput((0x38L<<16)|7L);		/* size of optional hdr and flags */
+
+		bput((0407<<16)|0437L);		/* magic and version */
+		bput(textsize);			/* sizes */
+		bput(datsize);
+		bput(bsssize);
+		bput(entryvalue());		/* va of entry */
+		bput(INITTEXT);			/* va of base of text */
+		bput(INITDAT);			/* va of base of data */
+		bput(INITDAT+datsize);		/* va of base of bss */
+		bput(~0L);			/* gp reg mask */
+		bput(lcsize);
+		bput(0L);
+		bput(0L);
+		bput(0L);
+		bput(~0L);			/* gp value ?? */
+
+		strnput(".text", 8);		/* text segment */
+		bput(INITTEXT);			/* address */
+		bput(INITTEXT);
+		bput(textsize);
+		bput(HEADR);
+		bput(0L);
+		bput(HEADR+textsize+datsize+symsize);
+		bput(lcsize);			/* line number size */
+		bput(0x20L);			/* flags */
+
+		strnput(".data", 8);		/* data segment */
+		bput(INITDAT);			/* address */
+		bput(INITDAT);
+		bput(datsize);
+		bput(HEADR+textsize);
+		bput(0L);
+		bput(0L);
+		bput(0L);
+		bput(0x40L);			/* flags */
+
+		strnput(".bss", 8);		/* bss segment */
+		bput(INITDAT+datsize);		/* address */
+		bput(INITDAT+datsize);
+		bput(bsssize);
+		bput(0L);
+		bput(0L);
+		bput(0L);
+		bput(0L);
+		bput(0x80L);			/* flags */
+		break;
+	case 4:
+
+		bput((0x160L<<16)|3L);		/* magic and sections */
+		bput(time(0));			/* time and date */
+		bput(rnd(HEADR+textsize, 4096)+datsize);
+		bput(symsize);			/* nsyms */
+		bput((0x38L<<16)|7L);		/* size of optional hdr and flags */
+
+		bput((0413<<16)|01012L);	/* magic and version */
+		bput(textsize);			/* sizes */
+		bput(datsize);
+		bput(bsssize);
+		bput(entryvalue());		/* va of entry */
+		bput(INITTEXT);			/* va of base of text */
+		bput(INITDAT);			/* va of base of data */
+		bput(INITDAT+datsize);		/* va of base of bss */
+		bput(~0L);			/* gp reg mask */
+		bput(lcsize);
+		bput(0L);
+		bput(0L);
+		bput(0L);
+		bput(~0L);			/* gp value ?? */
+
+		strnput(".text", 8);		/* text segment */
+		bput(INITTEXT);			/* address */
+		bput(INITTEXT);
+		bput(textsize);
+		bput(HEADR);
+		bput(0L);
+		bput(HEADR+textsize+datsize+symsize);
+		bput(lcsize);			/* line number size */
+		bput(0x20L);			/* flags */
+
+		strnput(".data", 8);		/* data segment */
+		bput(INITDAT);			/* address */
+		bput(INITDAT);
+		bput(datsize);
+		bput(rnd(HEADR+textsize, 4096));	/* sizes */
+		bput(0L);
+		bput(0L);
+		bput(0L);
+		bput(0x40L);			/* flags */
+
+		strnput(".bss", 8);		/* bss segment */
+		bput(INITDAT+datsize);		/* address */
+		bput(INITDAT+datsize);
+		bput(bsssize);
+		bput(0L);
+		bput(0L);
+		bput(0L);
+		bput(0L);
+		bput(0x80L);			/* flags */
+		break;
+	case 5:
+		strnput("\177ELF", 4);		/* e_ident */
+		cput(1);			/* class = 32 bit */
+		cput(2);			/* data = MSB */
+		cput(1);			/* version = CURRENT */
+		strnput("", 9);
+		bput((2L<<16)|8L);		/* type = EXEC; machine = MIPS */
+		bput(1L);			/* version = CURRENT */
+		bput(entryvalue());		/* entry vaddr */
+		bput(52L);			/* offset to first phdr */
+		bput(0L);			/* offset to first shdr */
+		bput(0L);			/* flags = MIPS */
+		bput((52L<<16)|32L);		/* Ehdr & Phdr sizes*/
+		bput((3L<<16)|0L);		/* # Phdrs & Shdr size */
+		bput((0L<<16)|0L);		/* # Shdrs & shdr string size */
+
+		bput(1L);			/* text - type = PT_LOAD */
+		bput(0L);			/* file offset */
+		bput(INITTEXT-HEADR);		/* vaddr */
+		bput(INITTEXT-HEADR);		/* paddr */
+		bput(HEADR+textsize);		/* file size */
+		bput(HEADR+textsize);		/* memory size */
+		bput(0x05L);			/* protections = RX */
+		bput(0x10000L);			/* alignment code?? */
+
+		bput(1L);			/* data - type = PT_LOAD */
+		bput(HEADR+textsize);		/* file offset */
+		bput(INITDAT);			/* vaddr */
+		bput(INITDAT);			/* paddr */
+		bput(datsize);			/* file size */
+		bput(datsize+bsssize);		/* memory size */
+		bput(0x06L);			/* protections = RW */
+		bput(0x10000L);			/* alignment code?? */
+
+		bput(0L);			/* data - type = PT_NULL */
+		bput(HEADR+textsize+datsize);	/* file offset */
+		bput(0L);
+		bput(0L);
+		bput(symsize);			/* symbol table size */
+		bput(lcsize);			/* line number size */
+		bput(0x04L);			/* protections = R */
+		bput(0x04L);			/* alignment code?? */
+		break;
+	case 6:
+		t = 22;
+		bput(((((4*t)+0)*t)+7));	/* magic */
+		bput(textsize);			/* sizes */
+		bput(datsize);
+		bput(bsssize);
+		bput(symsize);			/* nsyms */
+		bput(entryvalue());		/* va of entry */
+		bput(0L);
+		bput(lcsize);
+		break;
+	}
+	cflush();
+}
+
+void
+strnput(char *s, int n)
+{
+	for(; *s; s++){
+		cput(*s);
+		n--;
+	}
+	for(; n > 0; n--)
+		cput(0);
+}
+
+void
+cflush(void)
+{
+	int n;
+
+	n = sizeof(buf.cbuf) - cbc;
+	if(n)
+		write(cout, buf.cbuf, n);
+	cbp = (uchar*)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, 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 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, s->version);
+		else
+			putsymb(s->name, 'L', s->value, s->version);
+
+		/* frame, auto and param after */
+		putsymb(".frame", 'm', p->to.offset+8, 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, long v, int ver)
+{
+	int i, f;
+
+	if(t == 'f')
+		s++;
+	bput(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 += 4 + 1 + i + 1;
+
+	if(debug['n']) {
+		if(t == 'z' || t == 'Z') {
+			Bprint(&bso, "%c %.8lux ", 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 %.8lux %s<%d>\n", t, v, s, ver);
+		else
+			Bprint(&bso, "%c %.8lux %s\n", t, v, s);
+	}
+}
+
+#define	MINLC	4
+void
+asmlc(void)
+{
+	long oldpc, oldlc;
+	Prog *p;
+	long v, s;
+
+	oldpc = INITTEXT;
+	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)
+{
+	Prog *p;
+	char *cast;
+	long l, fl, j, d;
+	int i, c;
+
+	memset(buf.dbuf, 0, n+100);
+	for(p = datap; p != P; p = p->link) {
+		curp = p;
+		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\n");
+					break;
+				}
+		}
+		switch(p->to.type) {
+		default:
+			diag("unknown mode in initialization\n%P\n", p);
+			break;
+
+		case D_VCONST:
+			cast = (char*)p->to.ieee;
+			for(; i<c; i++) {
+				buf.dbuf[l] = cast[fnuxi8[i]];
+				l++;
+			}
+			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[fnuxi4[i]];
+					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_CONST:
+			d = p->to.offset;
+			if(p->to.sym) {
+				if(p->to.sym->type == STEXT ||
+				   p->to.sym->type == SLEAF)
+					d += p->to.sym->value;
+				if(p->to.sym->type == SDATA)
+					d += p->to.sym->value + INITDAT;
+				if(p->to.sym->type == SBSS)
+					d += p->to.sym->value + INITDAT;
+			}
+			cast = (char*)&d;
+			switch(c) {
+			default:
+				diag("bad nuxi %d %d\n%P\n", 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;
+			}
+			break;
+		}
+	}
+	write(cout, buf.dbuf, n);
+}
+
+#define	OP_RRR(op,r1,r2,r3)\
+	(op|(((r1)&31L)<<16)|(((r2)&31L)<<21)|(((r3)&31L)<<11))
+#define	OP_IRR(op,i,r2,r3)\
+	(op|((i)&0xffffL)|(((r2)&31L)<<21)|(((r3)&31L)<<16))
+#define	OP_SRR(op,s,r2,r3)\
+	(op|(((s)&31L)<<6)|(((r2)&31L)<<16)|(((r3)&31L)<<11))
+#define	OP_FRRR(op,r1,r2,r3)\
+	(op|(((r1)&31L)<<16)|(((r2)&31L)<<11)|(((r3)&31L)<<6))
+#define	OP_JMP(op,i)\
+		((op)|((i)&0x3ffffffL))
+
+#define	OP(x,y)\
+	(((x)<<3)|((y)<<0))
+#define	SP(x,y)\
+	(((x)<<29)|((y)<<26))
+#define	BCOND(x,y)\
+	(((x)<<19)|((y)<<16))
+#define	MMU(x,y)\
+	(SP(2,0)|(16<<21)|((x)<<3)|((y)<<0))
+#define	FPF(x,y)\
+	(SP(2,1)|(16<<21)|((x)<<3)|((y)<<0))
+#define	FPD(x,y)\
+	(SP(2,1)|(17<<21)|((x)<<3)|((y)<<0))
+#define	FPW(x,y)\
+	(SP(2,1)|(20<<21)|((x)<<3)|((y)<<0))
+#define	FPV(x,y)\
+	(SP(2,1)|(21<<21)|((x)<<3)|((y)<<0))
+
+int
+asmout(Prog *p, Optab *o, int aflag)
+{
+	long o1, o2, o3, o4, o5, o6, o7, v;
+	Prog *ct;
+	int r, a;
+
+	o1 = 0;
+	o2 = 0;
+	o3 = 0;
+	o4 = 0;
+	o5 = 0;
+	o6 = 0;
+	o7 = 0;
+	switch(o->type) {
+	default:
+		diag("unknown type %d\n", o->type);
+		if(!debug['a'])
+			prasm(p);
+		break;
+
+	case 0:		/* pseudo ops */
+		if(aflag) {
+			if(p->link) {
+				if(p->as == ATEXT) {
+					ct = curtext;
+					o2 = autosize;
+					curtext = p;
+					autosize = p->to.offset + 8;
+					o1 = asmout(p->link, oplook(p->link), aflag);
+					curtext = ct;
+					autosize = o2;
+				} else
+					o1 = asmout(p->link, oplook(p->link), aflag);
+			}
+			return o1;
+		}
+		break;
+
+	case 1:		/* mov[v] r1,r2 ==> OR r1,r0,r2 */
+		o1 = OP_RRR(oprrr(AOR), p->from.reg, REGZERO, p->to.reg);
+		break;
+
+	case 2:		/* add/sub r1,[r2],r3 */
+		r = p->reg;
+		if(r == NREG)
+			r = p->to.reg;
+		o1 = OP_RRR(oprrr(p->as), p->from.reg, r, p->to.reg);
+		break;
+
+	case 3:		/* mov $soreg, r ==> or/add $i,o,r */
+		v = regoff(&p->from);
+		r = p->from.reg;
+		if(r == NREG)
+			r = o->param;
+		a = AADDU;
+		if(o->a1 == C_ANDCON)
+			a = AOR;
+		o1 = OP_IRR(opirr(a), v, r, p->to.reg);
+		break;
+
+	case 4:		/* add $scon,[r1],r2 */
+		v = regoff(&p->from);
+		r = p->reg;
+		if(r == NREG)
+			r = p->to.reg;
+		o1 = OP_IRR(opirr(p->as), v, r, p->to.reg);
+		break;
+
+	case 5:		/* syscall */
+		if(aflag)
+			return 0;
+		o1 = oprrr(p->as);
+		break;
+
+	case 6:		/* beq r1,[r2],sbra */
+		if(aflag)
+			return 0;
+		if(!debug['Y'] && p->link && p->cond && isnop(p->link)) {
+			nop.branch.count--;
+			nop.branch.outof--;
+			nop.jump.outof++;
+			o2 = asmout(p->cond, oplook(p->cond), 1);
+			if(o2) {
+				if(p->cond == P)
+					v = -4 >> 2;
+				else
+					v = (p->cond->pc+4 - pc-4) >> 2;
+				if(((v << 16) >> 16) != v)
+					diag("short branch too far: %d\n%P\n", v, p);
+				o1 = OP_IRR(opirr(p->as+ALAST), v, p->from.reg, p->reg);
+				if(debug['a'])
+					Bprint(&bso, " %.8lux: %.8lux %.8lux%P\n",
+						p->pc, o1, o2, p);
+				lput(o1);
+				lput(o2);
+				return 1;
+			}
+		}
+		if(p->cond == P)
+			v = -4 >> 2;
+		else
+			v = (p->cond->pc - pc-4) >> 2;
+		if(((v << 16) >> 16) != v)
+			diag("short branch too far: %d\n%P\n", v, p);
+		o1 = OP_IRR(opirr(p->as), v, p->from.reg, p->reg);
+		break;
+
+	case 7:		/* mov r, soreg ==> sw o(r) */
+		r = p->to.reg;
+		if(r == NREG)
+			r = o->param;
+		v = regoff(&p->to);
+		o1 = OP_IRR(opirr(p->as), v, r, p->from.reg);
+		break;
+
+	case 8:		/* mov soreg, r ==> lw o(r) */
+		r = p->from.reg;
+		if(r == NREG)
+			r = o->param;
+		v = regoff(&p->from);
+		o1 = OP_IRR(opirr(p->as+ALAST), v, r, p->to.reg);
+		break;
+
+	case 9:		/* asl r1,[r2],r3 */
+		r = p->reg;
+		if(r == NREG)
+			r = p->to.reg;
+		o1 = OP_RRR(oprrr(p->as), r, p->from.reg, p->to.reg);
+		break;
+
+	case 10:	/* add $con,[r1],r2 ==> mov $con,t; add t,[r1],r2 */
+		v = regoff(&p->from);
+		r = AOR;
+		if(v < 0)
+			r = AADDU;
+		o1 = OP_IRR(opirr(r), v, 0, REGTMP);
+		r = p->reg;
+		if(r == NREG)
+			r = p->to.reg;
+		o2 = OP_RRR(oprrr(p->as), REGTMP, r, p->to.reg);
+		break;
+
+	case 11:	/* jmp lbra */
+		if(aflag)
+			return 0;
+		if(p->cond == P)
+			v = p->pc >> 2;
+		else
+			v = p->cond->pc >> 2;
+		o1 = OP_JMP(opirr(p->as), v);
+		if(!debug['Y'] && p->link && p->cond && isnop(p->link)) {
+			nop.branch.count--;
+			nop.branch.outof--;
+			nop.jump.outof++;
+			o2 = asmout(p->cond, oplook(p->cond), 1);
+			if(o2) {
+				o1 += 1;
+				if(debug['a'])
+					Bprint(&bso, " %.8lux: %.8lux %.8lux%P\n",
+						p->pc, o1, o2, p);
+				lput(o1);
+				lput(o2);
+				return 1;
+			}
+		}
+		break;
+
+	case 12:	/* movbs r,r */
+		v = 16;
+		if(p->as == AMOVB)
+			v = 24;
+		o1 = OP_SRR(opirr(ASLL), v, p->from.reg, p->to.reg);
+		o2 = OP_SRR(opirr(ASRA), v, p->to.reg, p->to.reg);
+		break;
+
+	case 13:	/* movbu r,r */
+		if(p->as == AMOVBU)
+			o1 = OP_IRR(opirr(AAND), 0xffL, p->from.reg, p->to.reg);
+		else
+			o1 = OP_IRR(opirr(AAND), 0xffffL, p->from.reg, p->to.reg);
+		break;
+
+	case 14:	/* movwu r,r */
+		v = 32-32;
+		o1 = OP_SRR(opirr(ASLLV+ALAST), v, p->from.reg, p->to.reg);
+		o2 = OP_SRR(opirr(ASRLV+ALAST), v, p->to.reg, p->to.reg);
+		break;
+
+	case 16:	/* sll $c,[r1],r2 */
+		v = regoff(&p->from);
+		r = p->reg;
+		if(r == NREG)
+			r = p->to.reg;
+		if(v >= 32)
+			o1 = OP_SRR(opirr(p->as+ALAST), v-32, r, p->to.reg);
+		else
+			o1 = OP_SRR(opirr(p->as), v, r, p->to.reg);
+		break;
+
+	case 18:	/* jmp [r1],0(r2) */
+		if(aflag)
+			return 0;
+		r = p->reg;
+		if(r == NREG)
+			r = o->param;
+		o1 = OP_RRR(oprrr(p->as), 0, p->to.reg, r);
+		break;
+
+	case 19:	/* mov $lcon,r ==> lu+or */
+		v = regoff(&p->from);
+		o1 = OP_IRR(opirr(ALAST), v>>16, REGZERO, p->to.reg);
+		o2 = OP_IRR(opirr(AOR), v, p->to.reg, p->to.reg);
+		break;
+
+	case 20:	/* mov lohi,r */
+		r = OP(2,0);		/* mfhi */
+		if(p->from.type == D_LO)
+			r = OP(2,2);	/* mflo */
+		o1 = OP_RRR(r, REGZERO, REGZERO, p->to.reg);
+		break;
+
+	case 21:	/* mov r,lohi */
+		r = OP(2,1);		/* mthi */
+		if(p->to.type == D_LO)
+			r = OP(2,3);	/* mtlo */
+		o1 = OP_RRR(r, REGZERO, p->from.reg, REGZERO);
+		break;
+
+	case 22:	/* mul r1,r2 */
+		o1 = OP_RRR(oprrr(p->as), p->from.reg, p->reg, REGZERO);
+		break;
+
+	case 23:	/* add $lcon,r1,r2 ==> lu+or+add */
+		v = regoff(&p->from);
+		if(p->to.reg == REGTMP || p->reg == REGTMP)
+			diag("cant synthesize large constant\n%P\n", p);
+		o1 = OP_IRR(opirr(ALAST), v>>16, REGZERO, REGTMP);
+		o2 = OP_IRR(opirr(AOR), v, REGTMP, REGTMP);
+		r = p->reg;
+		if(r == NREG)
+			r = p->to.reg;
+		o3 = OP_RRR(oprrr(p->as), REGTMP, r, p->to.reg);
+		break;
+
+	case 24:	/* mov $ucon,,r ==> lu r */
+		v = regoff(&p->from);
+		o1 = OP_IRR(opirr(ALAST), v>>16, REGZERO, p->to.reg);
+		break;
+
+	case 25:	/* add/and $ucon,[r1],r2 ==> lu $con,t; add t,[r1],r2 */
+		v = regoff(&p->from);
+		o1 = OP_IRR(opirr(ALAST), v>>16, REGZERO, REGTMP);
+		r = p->reg;
+		if(r == NREG)
+			r = p->to.reg;
+		o2 = OP_RRR(oprrr(p->as), REGTMP, r, p->to.reg);
+		break;
+
+	case 26:	/* mov $lsext/auto/oreg,,r2 ==> lu+or+add */
+		v = regoff(&p->from);
+		if(p->to.reg == REGTMP)
+			diag("cant synthesize large constant\n%P\n", p);
+		o1 = OP_IRR(opirr(ALAST), v>>16, REGZERO, REGTMP);
+		o2 = OP_IRR(opirr(AOR), v, REGTMP, REGTMP);
+		r = p->from.reg;
+		if(r == NREG)
+			r = o->param;
+		o3 = OP_RRR(oprrr(AADDU), REGTMP, r, p->to.reg);
+		break;
+
+	case 27:		/* mov [sl]ext/auto/oreg,fr ==> lwc1 o(r) */
+		r = p->from.reg;
+		if(r == NREG)
+			r = o->param;
+		v = regoff(&p->from);
+		if(p->as == AMOVD)
+			o4 = opirr(AMOVD+ALAST);
+		else
+			o4 = opirr(AMOVF+ALAST);
+		switch(o->size) {
+		case 16:
+			o1 = OP_IRR(opirr(ALAST), v>>16, REGZERO, REGTMP);
+			o2 = OP_IRR(opirr(AOR), v, REGTMP, REGTMP);
+			o3 = OP_RRR(oprrr(AADDU), r, REGTMP, REGTMP);
+			o4 = OP_IRR(o4, 0, REGTMP, p->to.reg);
+			break;
+		case 4:
+			o1 = OP_IRR(o4, v, r, p->to.reg);
+			break;
+		}
+		break;
+
+	case 28:		/* mov fr,[sl]ext/auto/oreg ==> swc1 o(r) */
+		r = p->to.reg;
+		if(r == NREG)
+			r = o->param;
+		v = regoff(&p->to);
+		if(p->as == AMOVD)
+			o4 = opirr(AMOVD);
+		else
+			o4 = opirr(AMOVF);
+		switch(o->size) {
+		case 16:
+			if(r == REGTMP)
+				diag("cant synthesize large constant\n%P\n", p);
+			o1 = OP_IRR(opirr(ALAST), v>>16, REGZERO, REGTMP);
+			o2 = OP_IRR(opirr(AOR), v, REGTMP, REGTMP);
+			o3 = OP_RRR(oprrr(AADDU), r, REGTMP, REGTMP);
+			o4 = OP_IRR(o4, 0, REGTMP, p->from.reg);
+			break;
+		case 4:
+			o1 = OP_IRR(o4, v, r, p->from.reg);
+			break;
+		}
+		break;
+
+	case 30:	/* movw r,fr */
+		r = SP(2,1)|(4<<21);		/* mtc1 */
+		o1 = OP_RRR(r, p->from.reg, 0, p->to.reg);
+		break;
+
+	case 31:	/* movw fr,r */
+		r = SP(2,1)|(0<<21);		/* mfc1 */
+		o1 = OP_RRR(r, p->to.reg, 0, p->from.reg);
+		break;
+
+	case 32:	/* fadd fr1,[fr2],fr3 */
+		r = p->reg;
+		if(r == NREG)
+			o1 = OP_FRRR(oprrr(p->as), p->from.reg, p->to.reg, p->to.reg);
+		else
+			o1 = OP_FRRR(oprrr(p->as), p->from.reg, r, p->to.reg);
+		break;
+
+	case 33:	/* fabs fr1,fr3 */
+		o1 = OP_FRRR(oprrr(p->as), 0, p->from.reg, p->to.reg);
+		break;
+
+	case 34:	/* mov $con,fr ==> or/add $i,r,r2 */
+		v = regoff(&p->from);
+		r = AADDU;
+		if(o->a1 == C_ANDCON)
+			r = AOR;
+		o1 = OP_IRR(opirr(r), v, 0, REGTMP);
+		o2 = OP_RRR(SP(2,1)|(4<<21), REGTMP, 0, p->to.reg);	/* mtc1 */
+		break;
+
+	case 35:	/* mov r,lext/luto/oreg ==> sw o(r) */
+		/*
+		 * the lowbits of the constant cannot
+		 * be moved into the offset of the load
+		 * because the mips 4000 in 64-bit mode
+		 * does a 64-bit add and it will screw up.
+		 */
+		v = regoff(&p->to);
+		r = p->to.reg;
+		if(r == NREG)
+			r = o->param;
+		if(r == REGTMP)
+			diag("cant synthesize large constant\n%P\n", p);
+		o1 = OP_IRR(opirr(ALAST), v>>16, REGZERO, REGTMP);
+		o2 = OP_IRR(opirr(AOR), v, REGTMP, REGTMP);
+		o3 = OP_RRR(oprrr(AADDU), r, REGTMP, REGTMP);
+		o4 = OP_IRR(opirr(p->as), 0, REGTMP, p->from.reg);
+		break;
+
+	case 36:	/* mov lext/lauto/lreg,r ==> lw o(r30) */
+		v = regoff(&p->from);
+		r = p->from.reg;
+		if(r == NREG)
+			r = o->param;
+		if(r == REGTMP)
+			diag("cant synthesize large constant\n%P\n", p);
+		o1 = OP_IRR(opirr(ALAST), v>>16, REGZERO, REGTMP);
+		o2 = OP_IRR(opirr(AOR), v, REGTMP, REGTMP);
+		o3 = OP_RRR(oprrr(AADDU), r, REGTMP, REGTMP);
+		o4 = OP_IRR(opirr(p->as+ALAST), 0, REGTMP, p->to.reg);
+		break;
+
+	case 37:	/* movw r,mr */
+		r = SP(2,0)|(4<<21);		/* mtc0 */
+		if(p->as == AMOVV)
+			r = SP(2,0)|(5<<21);	/* dmtc0 */
+		o1 = OP_RRR(r, p->from.reg, 0, p->to.reg);
+		break;
+
+	case 38:	/* movw mr,r */
+		r = SP(2,0)|(0<<21);		/* mfc0 */
+		if(p->as == AMOVV)
+			r = SP(2,0)|(1<<21);	/* dmfc0 */
+		o1 = OP_RRR(r, p->to.reg, 0, p->from.reg);
+		break;
+
+	case 39:	/* rfe ==> jmp+rfe */
+		if(aflag)
+			return 0;
+		o1 = OP_RRR(oprrr(AJMP), 0, p->to.reg, REGZERO);
+		o2 = oprrr(p->as);
+		break;
+
+	case 40:	/* word */
+		if(aflag)
+			return 0;
+		o1 = regoff(&p->to);
+		break;
+
+	case 41:	/* movw r,fcr */
+		o1 = OP_RRR(SP(2,1)|(2<<21), REGZERO, 0, p->to.reg); 	/* mfcc1 */
+		o2 = OP_RRR(SP(2,1)|(6<<21), p->from.reg, 0, p->to.reg);/* mtcc1 */
+		break;
+
+	case 42:	/* movw fcr,r */
+		o1 = OP_RRR(SP(2,1)|(2<<21), p->to.reg, 0, p->from.reg);/* mfcc1 */
+		break;
+
+	case 47:	/* movv r,fr */
+		r = SP(2,1)|(5<<21);		/* dmtc1 */
+		o1 = OP_RRR(r, p->from.reg, 0, p->to.reg);
+		break;
+
+	case 48:	/* movv fr,r */
+		r = SP(2,1)|(1<<21);		/* dmfc1 */
+		o1 = OP_RRR(r, p->to.reg, 0, p->from.reg);
+		break;
+	}
+	if(aflag)
+		return o1;
+	v = p->pc;
+	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);
+		lput(o1);
+		break;
+	case 8:
+		if(debug['a'])
+			Bprint(&bso, " %.8lux: %.8lux %.8lux%P\n", v, o1, o2, p);
+		lput(o1);
+		lput(o2);
+		break;
+	case 12:
+		if(debug['a'])
+			Bprint(&bso, " %.8lux: %.8lux %.8lux %.8lux%P\n", v, o1, o2, o3, p);
+		lput(o1);
+		lput(o2);
+		lput(o3);
+		break;
+	case 16:
+		if(debug['a'])
+			Bprint(&bso, " %.8lux: %.8lux %.8lux %.8lux %.8lux%P\n",
+				v, o1, o2, o3, o4, p);
+		lput(o1);
+		lput(o2);
+		lput(o3);
+		lput(o4);
+		break;
+	case 20:
+		if(debug['a'])
+			Bprint(&bso, " %.8lux: %.8lux %.8lux %.8lux %.8lux %.8lux%P\n",
+				v, o1, o2, o3, o4, o5, p);
+		lput(o1);
+		lput(o2);
+		lput(o3);
+		lput(o4);
+		lput(o5);
+		break;
+
+	case 28:
+		if(debug['a'])
+			Bprint(&bso, " %.8lux: %.8lux %.8lux %.8lux %.8lux %.8lux %.8lux %.8lux%P\n",
+				v, o1, o2, o3, o4, o5, o6, o7, p);
+		lput(o1);
+		lput(o2);
+		lput(o3);
+		lput(o4);
+		lput(o5);
+		lput(o6);
+		lput(o7);
+		break;
+	}
+	return 0;
+}
+
+int
+isnop(Prog *p)
+{
+	if(p->as != ANOR)
+		return 0;
+	if(p->reg != REGZERO && p->reg != NREG)
+		return 0;
+	if(p->from.type != D_REG || p->from.reg != REGZERO)
+		return 0;
+	if(p->to.type != D_REG || p->to.reg != REGZERO)
+		return 0;
+	return 1;
+}
+
+long
+oprrr(int a)
+{
+	switch(a) {
+	case AADD:	return OP(4,0);
+	case AADDU:	return OP(4,1);
+	case ASGT:	return OP(5,2);
+	case ASGTU:	return OP(5,3);
+	case AAND:	return OP(4,4);
+	case AOR:	return OP(4,5);
+	case AXOR:	return OP(4,6);
+	case ASUB:	return OP(4,2);
+	case ASUBU:	return OP(4,3);
+	case ANOR:	return OP(4,7);
+	case ASLL:	return OP(0,4);
+	case ASRL:	return OP(0,6);
+	case ASRA:	return OP(0,7);
+
+	case ASLLV:	return OP(2,4);
+	case ASRLV:	return OP(2,6);
+	case ASRAV:	return OP(2,7);
+
+	case AADDV:	return OP(5,4);
+	case AADDVU:	return OP(5,5);
+	case ASUBV:	return OP(5,6);
+	case ASUBVU:	return OP(5,7);
+	case AREM:
+	case ADIV:	return OP(3,2);
+	case AREMU:
+	case ADIVU:	return OP(3,3);
+	case AMUL:	return OP(3,0);
+	case AMULU:	return OP(3,1);
+
+	case AREMV:
+	case ADIVV:	return OP(3,6);
+	case AREMVU:
+	case ADIVVU:	return OP(3,7);
+	case AMULV:	return OP(3,4);
+	case AMULVU:	return OP(3,5);
+
+	case AJMP:	return OP(1,0);
+	case AJAL:	return OP(1,1);
+
+	case ABREAK:	return OP(1,5);
+	case ASYSCALL:	return OP(1,4);
+	case ATLBP:	return MMU(1,0);
+	case ATLBR:	return MMU(0,1);
+	case ATLBWI:	return MMU(0,2);
+	case ATLBWR:	return MMU(0,6);
+	case ARFE:	return MMU(2,0);
+
+	case ADIVF:	return FPF(0,3);
+	case ADIVD:	return FPD(0,3);
+	case AMULF:	return FPF(0,2);
+	case AMULD:	return FPD(0,2);
+	case ASUBF:	return FPF(0,1);
+	case ASUBD:	return FPD(0,1);
+	case AADDF:	return FPF(0,0);
+	case AADDD:	return FPD(0,0);
+
+	case ATRUNCFV:	return FPF(1,1);
+	case ATRUNCDV:	return FPD(1,1);
+	case ATRUNCFW:	return FPF(1,5);
+	case ATRUNCDW:	return FPD(1,5);
+	case AMOVFV:	return FPF(4,5);
+	case AMOVDV:	return FPD(4,5);
+	case AMOVVF:	return FPV(4,0);
+	case AMOVVD:	return FPV(4,1);
+
+	case AMOVFW:	return FPF(4,4);
+	case AMOVDW:	return FPD(4,4);
+	case AMOVWF:	return FPW(4,0);
+	case AMOVDF:	return FPD(4,0);
+	case AMOVWD:	return FPW(4,1);
+	case AMOVFD:	return FPF(4,1);
+	case AABSF:	return FPF(0,5);
+	case AABSD:	return FPD(0,5);
+	case AMOVF:	return FPF(0,6);
+	case AMOVD:	return FPD(0,6);
+	case ANEGF:	return FPF(0,7);
+	case ANEGD:	return FPD(0,7);
+
+	case ACMPEQF:	return FPF(6,2);
+	case ACMPEQD:	return FPD(6,2);
+	case ACMPGTF:	return FPF(7,4);
+	case ACMPGTD:	return FPD(7,4);
+	case ACMPGEF:	return FPF(7,6);
+	case ACMPGED:	return FPD(7,6);
+	}
+	if(a >= ALAST)
+		diag("bad rrr %A+ALAST", a-ALAST);
+	else
+		diag("bad rrr %A", a);
+	return 0;
+}
+
+long
+opirr(int a)
+{
+	switch(a) {
+	case AADD:		return SP(1,0);
+	case AADDU:		return SP(1,1);
+	case ASGT:		return SP(1,2);
+	case ASGTU:		return SP(1,3);
+	case AAND:		return SP(1,4);
+	case AOR:		return SP(1,5);
+	case AXOR:		return SP(1,6);
+	case ALAST:		return SP(1,7);			/* lui */
+	case ASLL:		return OP(0,0);
+	case ASRL:		return OP(0,2);
+	case ASRA:		return OP(0,3);
+
+	case AADDV:		return SP(3,0);
+	case AADDVU:		return SP(3,1);
+
+	case AJMP:		return SP(0,2);
+	case AJAL:		return SP(0,3);
+	case ABEQ:		return SP(0,4);
+	case ABEQ+ALAST:	return SP(2,4);			/* likely */
+	case ABNE:		return SP(0,5);
+	case ABNE+ALAST:	return SP(2,5);			/* likely */
+
+	case ABGEZ:		return SP(0,1)|BCOND(0,1);
+	case ABGEZ+ALAST:	return SP(0,1)|BCOND(0,3);	/* likely */
+	case ABGEZAL:		return SP(0,1)|BCOND(2,1);
+	case ABGEZAL+ALAST:	return SP(0,1)|BCOND(2,3);	/* likely */
+	case ABGTZ:		return SP(0,7);
+	case ABGTZ+ALAST:	return SP(2,7);			/* likely */
+	case ABLEZ:		return SP(0,6);
+	case ABLEZ+ALAST:	return SP(2,6);			/* likely */
+	case ABLTZ:		return SP(0,1)|BCOND(0,0);
+	case ABLTZ+ALAST:	return SP(0,1)|BCOND(0,2);	/* likely */
+	case ABLTZAL:		return SP(0,1)|BCOND(2,0);
+	case ABLTZAL+ALAST:	return SP(0,1)|BCOND(2,2);	/* likely */
+
+	case ABFPT:		return SP(2,1)|(257<<16);
+	case ABFPT+ALAST:	return SP(2,1)|(259<<16);	/* likely */
+	case ABFPF:		return SP(2,1)|(256<<16);
+	case ABFPF+ALAST:	return SP(2,1)|(258<<16);	/* likely */
+
+	case AMOVB:
+	case AMOVBU:		return SP(5,0);
+	case AMOVH:
+	case AMOVHU:		return SP(5,1);
+	case AMOVW:		return SP(5,3);
+	case AMOVV:		return SP(7,7);
+	case AMOVF:		return SP(7,1);
+	case AMOVD:		return SP(7,5);
+	case AMOVWL:		return SP(5,2);
+	case AMOVWR:		return SP(5,6);
+	case AMOVVL:		return SP(5,4);
+	case AMOVVR:		return SP(5,5);
+
+	case ABREAK:		return SP(5,7);
+
+	case AMOVWL+ALAST:	return SP(4,2);
+	case AMOVWR+ALAST:	return SP(4,6);
+	case AMOVVL+ALAST:	return SP(3,2);
+	case AMOVVR+ALAST:	return SP(3,3);
+	case AMOVB+ALAST:	return SP(4,0);
+	case AMOVBU+ALAST:	return SP(4,4);
+	case AMOVH+ALAST:	return SP(4,1);
+	case AMOVHU+ALAST:	return SP(4,5);
+	case AMOVW+ALAST:	return SP(4,3);
+	case AMOVV+ALAST:	return SP(6,7);
+	case AMOVF+ALAST:	return SP(6,1);
+	case AMOVD+ALAST:	return SP(6,5);
+
+	case ASLLV:		return OP(7,0);
+	case ASRLV:		return OP(7,2);
+	case ASRAV:		return OP(7,3);
+	case ASLLV+ALAST:	return OP(7,4);
+	case ASRLV+ALAST:	return OP(7,6);
+	case ASRAV+ALAST:	return OP(7,7);
+	}
+	if(a >= ALAST)
+		diag("bad irr %A+ALAST", a-ALAST);
+	else
+		diag("bad irr %A", a);
+	return 0;
+}