From 8231e94520e497ad8bba565f3c42b9749da5a644 Mon Sep 17 00:00:00 2001
From: Ken Thompson <ken@golang.org>
Date: Mon, 22 Sep 2008 12:16:19 -0700
Subject: [PATCH] now method/interface code

R=r
OCL=15627
CL=15627
---
 src/cmd/6g/cgen.c      |  18 +-
 src/cmd/6g/gen.c       |   6 +-
 src/cmd/6g/gsubr.c     |  43 +---
 src/cmd/6g/obj.c       |  42 ++--
 src/cmd/gc/go.h        |   6 +-
 src/cmd/gc/subr.c      |  58 ++++-
 src/cmd/gc/sys.go      |  11 +-
 src/cmd/gc/sysimport.c | 509 +++++++++++++++++++++--------------------
 src/cmd/gc/walk.c      | 154 +++++++++----
 src/runtime/Makefile   |   1 +
 src/runtime/iface.c    | 211 +++++++++++++++++
 src/runtime/runtime.c  | 170 --------------
 src/runtime/runtime.h  |  27 ---
 13 files changed, 667 insertions(+), 589 deletions(-)
 create mode 100644 src/runtime/iface.c

diff --git a/src/cmd/6g/cgen.c b/src/cmd/6g/cgen.c
index b2368c204bf..6e11558c2ce 100644
--- a/src/cmd/6g/cgen.c
+++ b/src/cmd/6g/cgen.c
@@ -154,10 +154,6 @@ cgen(Node *n, Node *res)
 		regfree(&n1);
 		break;
 
-	case OS2I:
-	case OI2I:
-	case OI2S:
-
 	case OINDEXPTR:
 	case OINDEX:
 	case ODOT:
@@ -345,12 +341,6 @@ agen(Node *n, Node *res)
 		cgen_aret(n, res);
 		break;
 
-	case OS2I:
-	case OI2I:
-	case OI2S:
-		agen_inter(n, res);
-		break;
-
 	case OINDEXPTR:
 		w = n->type->width;
 		if(nr->addable)
@@ -678,10 +668,10 @@ int32
 stkof(Node *n)
 {
 	switch(n->op) {
-	case OS2I:
-		return 2*widthptr;
-	case OI2I:
-		return 1*widthptr;
+//	case OS2I:
+//		return 2*widthptr;
+//	case OI2I:
+//		return 1*widthptr;
 	case OINDREG:
 		return n->xoffset;
 	}
diff --git a/src/cmd/6g/gen.c b/src/cmd/6g/gen.c
index 34b14ec6528..2ec661e4553 100644
--- a/src/cmd/6g/gen.c
+++ b/src/cmd/6g/gen.c
@@ -373,7 +373,7 @@ agen_inter(Node *n, Node *res)
 	default:
 		fatal("agen_inter %O\n", n->op);
 
-	case OS2I:
+//	case OS2I:
 		// ifaces2i(*sigi, *sigs, i.map, i.s)
 		// i.s is input
 		// (i.map, i.s) is output
@@ -398,7 +398,7 @@ agen_inter(Node *n, Node *res)
 		o = 2*widthptr;
 		break;
 
-	case OI2I:
+//	case OI2I:
 		// ifacei2i(*sigi, i.map, i.s)
 		// (i.map, i.s) is input
 		// (i.map, i.s) is output
@@ -424,7 +424,7 @@ agen_inter(Node *n, Node *res)
 		o = 1*widthptr;
 		break;
 
-	case OI2S:
+//	case OI2S:
 		// ifacei2s(*sigs, i.map, i.s)
 		// (i.map, i.s) is input
 		// i.s is output
diff --git a/src/cmd/6g/gsubr.c b/src/cmd/6g/gsubr.c
index 6919cb15f9d..0256100a837 100644
--- a/src/cmd/6g/gsubr.c
+++ b/src/cmd/6g/gsubr.c
@@ -294,45 +294,6 @@ nodconst(Node *n, Type *t, vlong v)
 	}
 }
 
-Sym*
-signame(Type *t)
-{
-	Sym *s;
-	char *e;
-
-loop:
-	if(t == T)
-		fatal("signame: nil type");
-
-	switch(t->etype) {
-	default:
-		e = "sigs";
-		break;
-
-	case TPTR32:
-	case TPTR64:
-		t = t->type;
-		goto loop;
-
-	case TSTRUCT:
-	case TINTER:
-		e = "sigi";
-		break;
-	}
-
-	s = t->sym;
-	if(s == S)
-		fatal("signame: no sym for type");
-
-	// mark it as used so signature will be generated
-	if(s->local == 1)
-		s->local = 2;
-
-	snprint(namebuf, sizeof(namebuf), "%s_%s", e, s->name);
-	s = pkglookup(namebuf, s->opackage);
-	return s;
-}
-
 void
 nodtypesig(Node *n, Type *t)
 {
@@ -1055,8 +1016,10 @@ naddr(Node *n, Addr *a)
 		a->etype = n->etype;
 		a->offset = n->xoffset;
 		a->sym = n->sym;
-		if(a->sym == S)
+		if(a->sym == S) {
 			a->sym = lookup(".noname");
+			fatal("noname");
+		}
 		if(n->method) {
 			if(n->type != T)
 			if(n->type->sym != S)
diff --git a/src/cmd/6g/obj.c b/src/cmd/6g/obj.c
index 0f187fefeda..969bd995ea7 100644
--- a/src/cmd/6g/obj.c
+++ b/src/cmd/6g/obj.c
@@ -161,8 +161,6 @@ dumpobj(void)
 		}
 	}
 	Bterm(bout);
-return;
-	Bterm(bout);
 }
 
 Bputdot(Biobuf *b)
@@ -477,31 +475,14 @@ dumpsignatures(void)
 		if(t == T)
 			continue;
 
-		et = t->etype;
-		if(t->method == T && et != TINTER)
-			continue;
-
-		s = d->dsym;
+		s = signame(t);
 		if(s == S)
 			continue;
 
-		if(s->name[0] == '_')
-			continue;
-
-		// if it was imported
-		if(s->local == 0)
-			continue;
-
-// until i can figure out
-// when/if it is used, do them all
-//		// if not used and not exported
-//		if(s->local == 1 && !s->export)
-//			continue;
-
 		x = mal(sizeof(*d));
 		x->op = OTYPE;
-		x->dsym = s;
-		x->dtype = t;
+		x->dsym = d->dsym;
+		x->dtype = d->dtype;
 		x->forw = signatlist;
 		signatlist = x;
 	}
@@ -548,9 +529,15 @@ dumpsignatures(void)
 			continue;
 
 		t = d->dtype;
-		et = t->etype;
-		if(t->method == T && et != TINTER)
+		at.sym = signame(t);
+		if(at.sym == S)
 			continue;
+		if(!at.sym->local)
+			continue;
+
+//print("SIGNAME = %lS\n", at.sym);
+
+		et = t->etype;
 
 		s = d->dsym;
 		if(s == S)
@@ -562,14 +549,13 @@ dumpsignatures(void)
 		if(strcmp(s->opackage, package) != 0)
 			continue;
 
-		at.sym = signame(t);
 
 		a = nil;
 		o = 0;
 
-		f = t->type;
-		if(et != TINTER)
-			f = t->method;
+		f = t->method;
+		if(et == TINTER)
+			f = t->type;
 
 		for(; f!=T; f=f->down) {
 			if(f->type->etype != TFUNC)
diff --git a/src/cmd/gc/go.h b/src/cmd/gc/go.h
index 178f28ef32f..303c8cc52dd 100644
--- a/src/cmd/gc/go.h
+++ b/src/cmd/gc/go.h
@@ -260,7 +260,7 @@ enum
 	ODCLFUNC, ODCLFIELD, ODCLARG,
 	OLIST, OCMP,
 	OPTR, OARRAY,
-	ORETURN, OFOR, OIF, OSWITCH, OI2S, OS2I, OI2I,
+	ORETURN, OFOR, OIF, OSWITCH,
 	OAS, OASOP, OCASE, OXCASE, OFALL, OXFALL,
 	OGOTO, OPROC, ONEW, OEMPTY, OSELECT,
 	OLEN, OCAP, OPANIC, OPRINT, OTYPEOF,
@@ -564,6 +564,7 @@ int	isptrarray(Type*);
 int	isptrdarray(Type*);
 int	isinter(Type*);
 int	ismethod(Type*);
+Sym*	signame(Type*);
 int	bytearraysz(Type*);
 int	eqtype(Type*, Type*, int);
 void	argtype(Node*, Type*);
@@ -692,7 +693,8 @@ Node*	mapop(Node*, int);
 Type*	fixchan(Type*);
 Node*	chanop(Node*, int);
 Node*	arrayop(Node*, int);
-Node*	isandss(Type*, Node*);
+Node*	ifaceop(Type*, Node*, int);
+int	isandss(Type*, Node*);
 Node*	convas(Node*);
 void	arrayconv(Type*, Node*);
 Node*	colas(Node*, Node*);
diff --git a/src/cmd/gc/subr.c b/src/cmd/gc/subr.c
index 15e4eb7e038..f288b3a0aef 100644
--- a/src/cmd/gc/subr.c
+++ b/src/cmd/gc/subr.c
@@ -644,9 +644,6 @@ opnames[] =
 	[OPTR]		= "PTR",
 	[ORETURN]	= "RETURN",
 	[ORSH]		= "RSH",
-	[OI2S]		= "I2S",
-	[OS2I]		= "S2I",
-	[OI2I]		= "I2I",
 	[OSLICE]	= "SLICE",
 	[OSUB]		= "SUB",
 	[OSELECT]	= "SELECT",
@@ -1238,6 +1235,58 @@ ismethod(Type *t)
 	return 0;
 }
 
+Sym*
+signame(Type *t)
+{
+	Sym *s, *ss;
+	char *e;
+
+loop:
+	if(t == T) {
+		print("signame: nil type\n");
+		goto bad;
+	}
+
+	switch(t->etype) {
+	default:
+		e = "sigs";
+		break;
+
+	case TPTR32:
+	case TPTR64:
+		t = t->type;
+		goto loop;
+
+	case TINTER:
+		e = "sigi";
+		break;
+	}
+
+	s = t->sym;
+	if(s == S) {
+		print("signame: no type name\n");
+		goto bad;
+	}
+	if(s->name[0] == '_') {
+//		print("signame: temp type name %S\n", s);
+		goto bad;
+	}
+
+	snprint(namebuf, sizeof(namebuf), "%s_%s", e, s->name);
+	ss = pkglookup(namebuf, s->opackage);
+	if(ss->oname == N) {
+		ss->oname = newname(ss);
+		ss->oname->type = types[TUINT8];
+		ss->oname->class = PEXTERN;
+		ss->local = s->local;
+//print("signame: %d %lS\n", ss->local, ss);
+	}
+	return ss;
+
+bad:
+	return S;
+}
+
 int
 bytearraysz(Type *t)
 {
@@ -1620,9 +1669,6 @@ ullmancalc(Node *n)
 	case ONAME:
 		ul = 0;
 		goto out;
-	case OS2I:
-	case OI2S:
-	case OI2I:
 	case OCALL:
 	case OCALLMETH:
 	case OCALLINTER:
diff --git a/src/cmd/gc/sys.go b/src/cmd/gc/sys.go
index d4443af36d6..083337d3c9a 100644
--- a/src/cmd/gc/sys.go
+++ b/src/cmd/gc/sys.go
@@ -23,7 +23,10 @@ func	slicestring(string, int32, int32) string;
 func	indexstring(string, int32) byte;
 func	intstring(int64) string;
 func	byteastring(*byte, int32) string;
-func	mkiface(*byte, *byte, *struct{}) interface{};
+
+func	ifaceT2I(sigi *byte, sigt *byte, elem any) (ret interface{});
+func	ifaceI2T(sigt *byte, iface interface{}) (ret any);
+func	ifaceI2I(sigi *byte, iface any) (ret any);
 
 func	argc() int32;
 func	envc() int32;
@@ -95,7 +98,11 @@ export
 	indexstring
 	intstring
 	byteastring
-	mkiface
+
+	// interface
+	ifaceT2I
+	ifaceI2T
+	ifaceI2I
 
 	// args
 	argc
diff --git a/src/cmd/gc/sysimport.c b/src/cmd/gc/sysimport.c
index b526085c1d6..ad858c9ebab 100644
--- a/src/cmd/gc/sysimport.c
+++ b/src/cmd/gc/sysimport.c
@@ -3,10 +3,10 @@ char*	sysimport =
 	"type sys._esys_002 {}\n"
 	"type sys.any 24\n"
 	"type sys._esys_003 *sys.any\n"
-	"type sys._osys_429 {_esys_427 sys._esys_003}\n"
+	"type sys._osys_445 {_esys_443 sys._esys_003}\n"
 	"type sys.uint32 6\n"
-	"type sys._isys_431 {_esys_428 sys.uint32}\n"
-	"type sys._esys_001 (sys._esys_002 sys._osys_429 sys._isys_431)\n"
+	"type sys._isys_447 {_esys_444 sys.uint32}\n"
+	"type sys._esys_001 (sys._esys_002 sys._osys_445 sys._isys_447)\n"
 	"var !sys.mal sys._esys_001\n"
 	"type sys._esys_005 {}\n"
 	"type sys._esys_006 {}\n"
@@ -26,320 +26,331 @@ char*	sysimport =
 	"type sys._esys_017 {}\n"
 	"type sys._esys_018 {}\n"
 	"type sys.int32 5\n"
-	"type sys._isys_439 {_esys_438 sys.int32}\n"
-	"type sys._esys_016 (sys._esys_017 sys._esys_018 sys._isys_439)\n"
+	"type sys._isys_455 {_esys_454 sys.int32}\n"
+	"type sys._esys_016 (sys._esys_017 sys._esys_018 sys._isys_455)\n"
 	"var !sys.panicl sys._esys_016\n"
 	"type sys._esys_020 {}\n"
 	"type sys._esys_021 {}\n"
 	"type sys.bool 12\n"
-	"type sys._isys_444 {_esys_443 sys.bool}\n"
-	"type sys._esys_019 (sys._esys_020 sys._esys_021 sys._isys_444)\n"
+	"type sys._isys_460 {_esys_459 sys.bool}\n"
+	"type sys._esys_019 (sys._esys_020 sys._esys_021 sys._isys_460)\n"
 	"var !sys.printbool sys._esys_019\n"
 	"type sys._esys_023 {}\n"
 	"type sys._esys_024 {}\n"
 	"type sys.float64 10\n"
-	"type sys._isys_449 {_esys_448 sys.float64}\n"
-	"type sys._esys_022 (sys._esys_023 sys._esys_024 sys._isys_449)\n"
+	"type sys._isys_465 {_esys_464 sys.float64}\n"
+	"type sys._esys_022 (sys._esys_023 sys._esys_024 sys._isys_465)\n"
 	"var !sys.printfloat sys._esys_022\n"
 	"type sys._esys_026 {}\n"
 	"type sys._esys_027 {}\n"
 	"type sys.int64 7\n"
-	"type sys._isys_454 {_esys_453 sys.int64}\n"
-	"type sys._esys_025 (sys._esys_026 sys._esys_027 sys._isys_454)\n"
+	"type sys._isys_470 {_esys_469 sys.int64}\n"
+	"type sys._esys_025 (sys._esys_026 sys._esys_027 sys._isys_470)\n"
 	"var !sys.printint sys._esys_025\n"
 	"type sys._esys_029 {}\n"
 	"type sys._esys_030 {}\n"
 	"type sys._esys_031 25\n"
 	"type sys.string *sys._esys_031\n"
-	"type sys._isys_459 {_esys_458 sys.string}\n"
-	"type sys._esys_028 (sys._esys_029 sys._esys_030 sys._isys_459)\n"
+	"type sys._isys_475 {_esys_474 sys.string}\n"
+	"type sys._esys_028 (sys._esys_029 sys._esys_030 sys._isys_475)\n"
 	"var !sys.printstring sys._esys_028\n"
 	"type sys._esys_033 {}\n"
 	"type sys._esys_034 {}\n"
 	"type sys._esys_035 *sys.any\n"
-	"type sys._isys_464 {_esys_463 sys._esys_035}\n"
-	"type sys._esys_032 (sys._esys_033 sys._esys_034 sys._isys_464)\n"
+	"type sys._isys_480 {_esys_479 sys._esys_035}\n"
+	"type sys._esys_032 (sys._esys_033 sys._esys_034 sys._isys_480)\n"
 	"var !sys.printpointer sys._esys_032\n"
 	"type sys._esys_037 {}\n"
-	"type sys._osys_471 {_esys_468 sys.string}\n"
-	"type sys._isys_473 {_esys_469 sys.string _esys_470 sys.string}\n"
-	"type sys._esys_036 (sys._esys_037 sys._osys_471 sys._isys_473)\n"
+	"type sys._osys_487 {_esys_484 sys.string}\n"
+	"type sys._isys_489 {_esys_485 sys.string _esys_486 sys.string}\n"
+	"type sys._esys_036 (sys._esys_037 sys._osys_487 sys._isys_489)\n"
 	"var !sys.catstring sys._esys_036\n"
 	"type sys._esys_039 {}\n"
-	"type sys._osys_481 {_esys_478 sys.int32}\n"
-	"type sys._isys_483 {_esys_479 sys.string _esys_480 sys.string}\n"
-	"type sys._esys_038 (sys._esys_039 sys._osys_481 sys._isys_483)\n"
+	"type sys._osys_497 {_esys_494 sys.int32}\n"
+	"type sys._isys_499 {_esys_495 sys.string _esys_496 sys.string}\n"
+	"type sys._esys_038 (sys._esys_039 sys._osys_497 sys._isys_499)\n"
 	"var !sys.cmpstring sys._esys_038\n"
 	"type sys._esys_041 {}\n"
-	"type sys._osys_492 {_esys_488 sys.string}\n"
-	"type sys._isys_494 {_esys_489 sys.string _esys_490 sys.int32 _esys_491 sys.int32}\n"
-	"type sys._esys_040 (sys._esys_041 sys._osys_492 sys._isys_494)\n"
+	"type sys._osys_508 {_esys_504 sys.string}\n"
+	"type sys._isys_510 {_esys_505 sys.string _esys_506 sys.int32 _esys_507 sys.int32}\n"
+	"type sys._esys_040 (sys._esys_041 sys._osys_508 sys._isys_510)\n"
 	"var !sys.slicestring sys._esys_040\n"
 	"type sys._esys_043 {}\n"
 	"type sys.uint8 2\n"
-	"type sys._osys_503 {_esys_500 sys.uint8}\n"
-	"type sys._isys_505 {_esys_501 sys.string _esys_502 sys.int32}\n"
-	"type sys._esys_042 (sys._esys_043 sys._osys_503 sys._isys_505)\n"
+	"type sys._osys_519 {_esys_516 sys.uint8}\n"
+	"type sys._isys_521 {_esys_517 sys.string _esys_518 sys.int32}\n"
+	"type sys._esys_042 (sys._esys_043 sys._osys_519 sys._isys_521)\n"
 	"var !sys.indexstring sys._esys_042\n"
 	"type sys._esys_045 {}\n"
-	"type sys._osys_512 {_esys_510 sys.string}\n"
-	"type sys._isys_514 {_esys_511 sys.int64}\n"
-	"type sys._esys_044 (sys._esys_045 sys._osys_512 sys._isys_514)\n"
+	"type sys._osys_528 {_esys_526 sys.string}\n"
+	"type sys._isys_530 {_esys_527 sys.int64}\n"
+	"type sys._esys_044 (sys._esys_045 sys._osys_528 sys._isys_530)\n"
 	"var !sys.intstring sys._esys_044\n"
 	"type sys._esys_047 {}\n"
-	"type sys._osys_521 {_esys_518 sys.string}\n"
+	"type sys._osys_537 {_esys_534 sys.string}\n"
 	"type sys._esys_048 *sys.uint8\n"
-	"type sys._isys_523 {_esys_519 sys._esys_048 _esys_520 sys.int32}\n"
-	"type sys._esys_046 (sys._esys_047 sys._osys_521 sys._isys_523)\n"
+	"type sys._isys_539 {_esys_535 sys._esys_048 _esys_536 sys.int32}\n"
+	"type sys._esys_046 (sys._esys_047 sys._osys_537 sys._isys_539)\n"
 	"var !sys.byteastring sys._esys_046\n"
 	"type sys._esys_050 {}\n"
 	"type sys._esys_051 <>\n"
-	"type sys._osys_532 {_esys_528 sys._esys_051}\n"
+	"type sys._osys_544 {ret sys._esys_051}\n"
 	"type sys._esys_052 *sys.uint8\n"
 	"type sys._esys_053 *sys.uint8\n"
-	"type sys._ssys_539 {}\n"
-	"type sys._esys_054 *sys._ssys_539\n"
-	"type sys._isys_534 {_esys_529 sys._esys_052 _esys_530 sys._esys_053 _esys_531 sys._esys_054}\n"
-	"type sys._esys_049 (sys._esys_050 sys._osys_532 sys._isys_534)\n"
-	"var !sys.mkiface sys._esys_049\n"
-	"type sys._esys_056 {}\n"
-	"type sys._osys_543 {_esys_542 sys.int32}\n"
-	"type sys._esys_057 {}\n"
-	"type sys._esys_055 (sys._esys_056 sys._osys_543 sys._esys_057)\n"
-	"var !sys.argc sys._esys_055\n"
+	"type sys._isys_546 {sigi sys._esys_052 sigt sys._esys_053 elem sys.any}\n"
+	"type sys._esys_049 (sys._esys_050 sys._osys_544 sys._isys_546)\n"
+	"var !sys.ifaceT2I sys._esys_049\n"
+	"type sys._esys_055 {}\n"
+	"type sys._osys_553 {ret sys.any}\n"
+	"type sys._esys_056 *sys.uint8\n"
+	"type sys._esys_057 <>\n"
+	"type sys._isys_555 {sigt sys._esys_056 iface sys._esys_057}\n"
+	"type sys._esys_054 (sys._esys_055 sys._osys_553 sys._isys_555)\n"
+	"var !sys.ifaceI2T sys._esys_054\n"
 	"type sys._esys_059 {}\n"
-	"type sys._osys_547 {_esys_546 sys.int32}\n"
-	"type sys._esys_060 {}\n"
-	"type sys._esys_058 (sys._esys_059 sys._osys_547 sys._esys_060)\n"
-	"var !sys.envc sys._esys_058\n"
+	"type sys._osys_561 {ret sys.any}\n"
+	"type sys._esys_060 *sys.uint8\n"
+	"type sys._isys_563 {sigi sys._esys_060 iface sys.any}\n"
+	"type sys._esys_058 (sys._esys_059 sys._osys_561 sys._isys_563)\n"
+	"var !sys.ifaceI2I sys._esys_058\n"
 	"type sys._esys_062 {}\n"
-	"type sys._osys_552 {_esys_550 sys.string}\n"
-	"type sys._isys_554 {_esys_551 sys.int32}\n"
-	"type sys._esys_061 (sys._esys_062 sys._osys_552 sys._isys_554)\n"
-	"var !sys.argv sys._esys_061\n"
-	"type sys._esys_064 {}\n"
-	"type sys._osys_560 {_esys_558 sys.string}\n"
-	"type sys._isys_562 {_esys_559 sys.int32}\n"
-	"type sys._esys_063 (sys._esys_064 sys._osys_560 sys._isys_562)\n"
-	"var !sys.envv sys._esys_063\n"
+	"type sys._osys_570 {_esys_569 sys.int32}\n"
+	"type sys._esys_063 {}\n"
+	"type sys._esys_061 (sys._esys_062 sys._osys_570 sys._esys_063)\n"
+	"var !sys.argc sys._esys_061\n"
+	"type sys._esys_065 {}\n"
+	"type sys._osys_574 {_esys_573 sys.int32}\n"
 	"type sys._esys_066 {}\n"
-	"type sys._osys_569 {_esys_566 sys.float64 _esys_567 sys.int32}\n"
-	"type sys._isys_571 {_esys_568 sys.float64}\n"
-	"type sys._esys_065 (sys._esys_066 sys._osys_569 sys._isys_571)\n"
-	"var !sys.frexp sys._esys_065\n"
+	"type sys._esys_064 (sys._esys_065 sys._osys_574 sys._esys_066)\n"
+	"var !sys.envc sys._esys_064\n"
 	"type sys._esys_068 {}\n"
-	"type sys._osys_578 {_esys_575 sys.float64}\n"
-	"type sys._isys_580 {_esys_576 sys.float64 _esys_577 sys.int32}\n"
-	"type sys._esys_067 (sys._esys_068 sys._osys_578 sys._isys_580)\n"
-	"var !sys.ldexp sys._esys_067\n"
+	"type sys._osys_579 {_esys_577 sys.string}\n"
+	"type sys._isys_581 {_esys_578 sys.int32}\n"
+	"type sys._esys_067 (sys._esys_068 sys._osys_579 sys._isys_581)\n"
+	"var !sys.argv sys._esys_067\n"
 	"type sys._esys_070 {}\n"
-	"type sys._osys_588 {_esys_585 sys.float64 _esys_586 sys.float64}\n"
-	"type sys._isys_590 {_esys_587 sys.float64}\n"
-	"type sys._esys_069 (sys._esys_070 sys._osys_588 sys._isys_590)\n"
-	"var !sys.modf sys._esys_069\n"
+	"type sys._osys_587 {_esys_585 sys.string}\n"
+	"type sys._isys_589 {_esys_586 sys.int32}\n"
+	"type sys._esys_069 (sys._esys_070 sys._osys_587 sys._isys_589)\n"
+	"var !sys.envv sys._esys_069\n"
 	"type sys._esys_072 {}\n"
-	"type sys._osys_597 {_esys_594 sys.bool}\n"
-	"type sys._isys_599 {_esys_595 sys.float64 _esys_596 sys.int32}\n"
-	"type sys._esys_071 (sys._esys_072 sys._osys_597 sys._isys_599)\n"
-	"var !sys.isInf sys._esys_071\n"
+	"type sys._osys_596 {_esys_593 sys.float64 _esys_594 sys.int32}\n"
+	"type sys._isys_598 {_esys_595 sys.float64}\n"
+	"type sys._esys_071 (sys._esys_072 sys._osys_596 sys._isys_598)\n"
+	"var !sys.frexp sys._esys_071\n"
 	"type sys._esys_074 {}\n"
-	"type sys._osys_606 {_esys_604 sys.bool}\n"
-	"type sys._isys_608 {_esys_605 sys.float64}\n"
-	"type sys._esys_073 (sys._esys_074 sys._osys_606 sys._isys_608)\n"
-	"var !sys.isNaN sys._esys_073\n"
+	"type sys._osys_605 {_esys_602 sys.float64}\n"
+	"type sys._isys_607 {_esys_603 sys.float64 _esys_604 sys.int32}\n"
+	"type sys._esys_073 (sys._esys_074 sys._osys_605 sys._isys_607)\n"
+	"var !sys.ldexp sys._esys_073\n"
 	"type sys._esys_076 {}\n"
-	"type sys._osys_614 {_esys_612 sys.float64}\n"
-	"type sys._isys_616 {_esys_613 sys.int32}\n"
-	"type sys._esys_075 (sys._esys_076 sys._osys_614 sys._isys_616)\n"
-	"var !sys.Inf sys._esys_075\n"
+	"type sys._osys_615 {_esys_612 sys.float64 _esys_613 sys.float64}\n"
+	"type sys._isys_617 {_esys_614 sys.float64}\n"
+	"type sys._esys_075 (sys._esys_076 sys._osys_615 sys._isys_617)\n"
+	"var !sys.modf sys._esys_075\n"
 	"type sys._esys_078 {}\n"
-	"type sys._osys_621 {_esys_620 sys.float64}\n"
-	"type sys._esys_079 {}\n"
-	"type sys._esys_077 (sys._esys_078 sys._osys_621 sys._esys_079)\n"
-	"var !sys.NaN sys._esys_077\n"
-	"type sys._esys_081 {}\n"
-	"type sys._esys_083 [sys.any] sys.any\n"
-	"type sys._esys_082 *sys._esys_083\n"
-	"type sys._osys_624 {hmap sys._esys_082}\n"
-	"type sys._isys_626 {keysize sys.uint32 valsize sys.uint32 keyalg sys.uint32 valalg sys.uint32 hint sys.uint32}\n"
-	"type sys._esys_080 (sys._esys_081 sys._osys_624 sys._isys_626)\n"
-	"var !sys.newmap sys._esys_080\n"
+	"type sys._osys_624 {_esys_621 sys.bool}\n"
+	"type sys._isys_626 {_esys_622 sys.float64 _esys_623 sys.int32}\n"
+	"type sys._esys_077 (sys._esys_078 sys._osys_624 sys._isys_626)\n"
+	"var !sys.isInf sys._esys_077\n"
+	"type sys._esys_080 {}\n"
+	"type sys._osys_633 {_esys_631 sys.bool}\n"
+	"type sys._isys_635 {_esys_632 sys.float64}\n"
+	"type sys._esys_079 (sys._esys_080 sys._osys_633 sys._isys_635)\n"
+	"var !sys.isNaN sys._esys_079\n"
+	"type sys._esys_082 {}\n"
+	"type sys._osys_641 {_esys_639 sys.float64}\n"
+	"type sys._isys_643 {_esys_640 sys.int32}\n"
+	"type sys._esys_081 (sys._esys_082 sys._osys_641 sys._isys_643)\n"
+	"var !sys.Inf sys._esys_081\n"
+	"type sys._esys_084 {}\n"
+	"type sys._osys_648 {_esys_647 sys.float64}\n"
 	"type sys._esys_085 {}\n"
-	"type sys._osys_635 {val sys.any}\n"
-	"type sys._esys_087 [sys.any] sys.any\n"
-	"type sys._esys_086 *sys._esys_087\n"
-	"type sys._isys_637 {hmap sys._esys_086 key sys.any}\n"
-	"type sys._esys_084 (sys._esys_085 sys._osys_635 sys._isys_637)\n"
-	"var !sys.mapaccess1 sys._esys_084\n"
-	"type sys._esys_089 {}\n"
-	"type sys._osys_643 {val sys.any pres sys.bool}\n"
-	"type sys._esys_091 [sys.any] sys.any\n"
-	"type sys._esys_090 *sys._esys_091\n"
-	"type sys._isys_645 {hmap sys._esys_090 key sys.any}\n"
-	"type sys._esys_088 (sys._esys_089 sys._osys_643 sys._isys_645)\n"
-	"var !sys.mapaccess2 sys._esys_088\n"
-	"type sys._esys_093 {}\n"
-	"type sys._esys_094 {}\n"
-	"type sys._esys_096 [sys.any] sys.any\n"
-	"type sys._esys_095 *sys._esys_096\n"
-	"type sys._isys_652 {hmap sys._esys_095 key sys.any val sys.any}\n"
-	"type sys._esys_092 (sys._esys_093 sys._esys_094 sys._isys_652)\n"
-	"var !sys.mapassign1 sys._esys_092\n"
-	"type sys._esys_098 {}\n"
+	"type sys._esys_083 (sys._esys_084 sys._osys_648 sys._esys_085)\n"
+	"var !sys.NaN sys._esys_083\n"
+	"type sys._esys_087 {}\n"
+	"type sys._esys_089 [sys.any] sys.any\n"
+	"type sys._esys_088 *sys._esys_089\n"
+	"type sys._osys_651 {hmap sys._esys_088}\n"
+	"type sys._isys_653 {keysize sys.uint32 valsize sys.uint32 keyalg sys.uint32 valalg sys.uint32 hint sys.uint32}\n"
+	"type sys._esys_086 (sys._esys_087 sys._osys_651 sys._isys_653)\n"
+	"var !sys.newmap sys._esys_086\n"
+	"type sys._esys_091 {}\n"
+	"type sys._osys_662 {val sys.any}\n"
+	"type sys._esys_093 [sys.any] sys.any\n"
+	"type sys._esys_092 *sys._esys_093\n"
+	"type sys._isys_664 {hmap sys._esys_092 key sys.any}\n"
+	"type sys._esys_090 (sys._esys_091 sys._osys_662 sys._isys_664)\n"
+	"var !sys.mapaccess1 sys._esys_090\n"
+	"type sys._esys_095 {}\n"
+	"type sys._osys_670 {val sys.any pres sys.bool}\n"
+	"type sys._esys_097 [sys.any] sys.any\n"
+	"type sys._esys_096 *sys._esys_097\n"
+	"type sys._isys_672 {hmap sys._esys_096 key sys.any}\n"
+	"type sys._esys_094 (sys._esys_095 sys._osys_670 sys._isys_672)\n"
+	"var !sys.mapaccess2 sys._esys_094\n"
 	"type sys._esys_099 {}\n"
-	"type sys._esys_101 [sys.any] sys.any\n"
-	"type sys._esys_100 *sys._esys_101\n"
-	"type sys._isys_658 {hmap sys._esys_100 key sys.any val sys.any pres sys.bool}\n"
-	"type sys._esys_097 (sys._esys_098 sys._esys_099 sys._isys_658)\n"
-	"var !sys.mapassign2 sys._esys_097\n"
-	"type sys._esys_103 {}\n"
-	"type sys._esys_105 1 sys.any\n"
-	"type sys._esys_104 *sys._esys_105\n"
-	"type sys._osys_665 {hchan sys._esys_104}\n"
-	"type sys._isys_667 {elemsize sys.uint32 elemalg sys.uint32 hint sys.uint32}\n"
-	"type sys._esys_102 (sys._esys_103 sys._osys_665 sys._isys_667)\n"
-	"var !sys.newchan sys._esys_102\n"
-	"type sys._esys_107 {}\n"
-	"type sys._osys_674 {elem sys.any}\n"
-	"type sys._esys_109 1 sys.any\n"
-	"type sys._esys_108 *sys._esys_109\n"
-	"type sys._isys_676 {hchan sys._esys_108}\n"
-	"type sys._esys_106 (sys._esys_107 sys._osys_674 sys._isys_676)\n"
-	"var !sys.chanrecv1 sys._esys_106\n"
-	"type sys._esys_111 {}\n"
-	"type sys._osys_681 {elem sys.any pres sys.bool}\n"
-	"type sys._esys_113 1 sys.any\n"
-	"type sys._esys_112 *sys._esys_113\n"
-	"type sys._isys_683 {hchan sys._esys_112}\n"
-	"type sys._esys_110 (sys._esys_111 sys._osys_681 sys._isys_683)\n"
-	"var !sys.chanrecv2 sys._esys_110\n"
-	"type sys._esys_115 {}\n"
-	"type sys._osys_689 {pres sys.bool}\n"
-	"type sys._esys_117 1 sys.any\n"
-	"type sys._esys_116 *sys._esys_117\n"
-	"type sys._esys_118 *sys.any\n"
-	"type sys._isys_691 {hchan sys._esys_116 elem sys._esys_118}\n"
-	"type sys._esys_114 (sys._esys_115 sys._osys_689 sys._isys_691)\n"
-	"var !sys.chanrecv3 sys._esys_114\n"
-	"type sys._esys_120 {}\n"
+	"type sys._esys_100 {}\n"
+	"type sys._esys_102 [sys.any] sys.any\n"
+	"type sys._esys_101 *sys._esys_102\n"
+	"type sys._isys_679 {hmap sys._esys_101 key sys.any val sys.any}\n"
+	"type sys._esys_098 (sys._esys_099 sys._esys_100 sys._isys_679)\n"
+	"var !sys.mapassign1 sys._esys_098\n"
+	"type sys._esys_104 {}\n"
+	"type sys._esys_105 {}\n"
+	"type sys._esys_107 [sys.any] sys.any\n"
+	"type sys._esys_106 *sys._esys_107\n"
+	"type sys._isys_685 {hmap sys._esys_106 key sys.any val sys.any pres sys.bool}\n"
+	"type sys._esys_103 (sys._esys_104 sys._esys_105 sys._isys_685)\n"
+	"var !sys.mapassign2 sys._esys_103\n"
+	"type sys._esys_109 {}\n"
+	"type sys._esys_111 1 sys.any\n"
+	"type sys._esys_110 *sys._esys_111\n"
+	"type sys._osys_692 {hchan sys._esys_110}\n"
+	"type sys._isys_694 {elemsize sys.uint32 elemalg sys.uint32 hint sys.uint32}\n"
+	"type sys._esys_108 (sys._esys_109 sys._osys_692 sys._isys_694)\n"
+	"var !sys.newchan sys._esys_108\n"
+	"type sys._esys_113 {}\n"
+	"type sys._osys_701 {elem sys.any}\n"
+	"type sys._esys_115 1 sys.any\n"
+	"type sys._esys_114 *sys._esys_115\n"
+	"type sys._isys_703 {hchan sys._esys_114}\n"
+	"type sys._esys_112 (sys._esys_113 sys._osys_701 sys._isys_703)\n"
+	"var !sys.chanrecv1 sys._esys_112\n"
+	"type sys._esys_117 {}\n"
+	"type sys._osys_708 {elem sys.any pres sys.bool}\n"
+	"type sys._esys_119 1 sys.any\n"
+	"type sys._esys_118 *sys._esys_119\n"
+	"type sys._isys_710 {hchan sys._esys_118}\n"
+	"type sys._esys_116 (sys._esys_117 sys._osys_708 sys._isys_710)\n"
+	"var !sys.chanrecv2 sys._esys_116\n"
 	"type sys._esys_121 {}\n"
+	"type sys._osys_716 {pres sys.bool}\n"
 	"type sys._esys_123 1 sys.any\n"
 	"type sys._esys_122 *sys._esys_123\n"
-	"type sys._isys_697 {hchan sys._esys_122 elem sys.any}\n"
-	"type sys._esys_119 (sys._esys_120 sys._esys_121 sys._isys_697)\n"
-	"var !sys.chansend1 sys._esys_119\n"
-	"type sys._esys_125 {}\n"
-	"type sys._osys_702 {pres sys.bool}\n"
-	"type sys._esys_127 1 sys.any\n"
-	"type sys._esys_126 *sys._esys_127\n"
-	"type sys._isys_704 {hchan sys._esys_126 elem sys.any}\n"
-	"type sys._esys_124 (sys._esys_125 sys._osys_702 sys._isys_704)\n"
-	"var !sys.chansend2 sys._esys_124\n"
-	"type sys._esys_129 {}\n"
-	"type sys._esys_130 *sys.uint8\n"
-	"type sys._osys_710 {sel sys._esys_130}\n"
-	"type sys._isys_712 {size sys.uint32}\n"
-	"type sys._esys_128 (sys._esys_129 sys._osys_710 sys._isys_712)\n"
-	"var !sys.newselect sys._esys_128\n"
-	"type sys._esys_132 {}\n"
-	"type sys._osys_717 {selected sys.bool}\n"
-	"type sys._esys_133 *sys.uint8\n"
-	"type sys._esys_135 1 sys.any\n"
-	"type sys._esys_134 *sys._esys_135\n"
-	"type sys._isys_719 {sel sys._esys_133 hchan sys._esys_134 elem sys.any}\n"
-	"type sys._esys_131 (sys._esys_132 sys._osys_717 sys._isys_719)\n"
-	"var !sys.selectsend sys._esys_131\n"
-	"type sys._esys_137 {}\n"
-	"type sys._osys_726 {selected sys.bool}\n"
-	"type sys._esys_138 *sys.uint8\n"
-	"type sys._esys_140 1 sys.any\n"
-	"type sys._esys_139 *sys._esys_140\n"
-	"type sys._esys_141 *sys.any\n"
-	"type sys._isys_728 {sel sys._esys_138 hchan sys._esys_139 elem sys._esys_141}\n"
-	"type sys._esys_136 (sys._esys_137 sys._osys_726 sys._isys_728)\n"
-	"var !sys.selectrecv sys._esys_136\n"
+	"type sys._esys_124 *sys.any\n"
+	"type sys._isys_718 {hchan sys._esys_122 elem sys._esys_124}\n"
+	"type sys._esys_120 (sys._esys_121 sys._osys_716 sys._isys_718)\n"
+	"var !sys.chanrecv3 sys._esys_120\n"
+	"type sys._esys_126 {}\n"
+	"type sys._esys_127 {}\n"
+	"type sys._esys_129 1 sys.any\n"
+	"type sys._esys_128 *sys._esys_129\n"
+	"type sys._isys_724 {hchan sys._esys_128 elem sys.any}\n"
+	"type sys._esys_125 (sys._esys_126 sys._esys_127 sys._isys_724)\n"
+	"var !sys.chansend1 sys._esys_125\n"
+	"type sys._esys_131 {}\n"
+	"type sys._osys_729 {pres sys.bool}\n"
+	"type sys._esys_133 1 sys.any\n"
+	"type sys._esys_132 *sys._esys_133\n"
+	"type sys._isys_731 {hchan sys._esys_132 elem sys.any}\n"
+	"type sys._esys_130 (sys._esys_131 sys._osys_729 sys._isys_731)\n"
+	"var !sys.chansend2 sys._esys_130\n"
+	"type sys._esys_135 {}\n"
+	"type sys._esys_136 *sys.uint8\n"
+	"type sys._osys_737 {sel sys._esys_136}\n"
+	"type sys._isys_739 {size sys.uint32}\n"
+	"type sys._esys_134 (sys._esys_135 sys._osys_737 sys._isys_739)\n"
+	"var !sys.newselect sys._esys_134\n"
+	"type sys._esys_138 {}\n"
+	"type sys._osys_744 {selected sys.bool}\n"
+	"type sys._esys_139 *sys.uint8\n"
+	"type sys._esys_141 1 sys.any\n"
+	"type sys._esys_140 *sys._esys_141\n"
+	"type sys._isys_746 {sel sys._esys_139 hchan sys._esys_140 elem sys.any}\n"
+	"type sys._esys_137 (sys._esys_138 sys._osys_744 sys._isys_746)\n"
+	"var !sys.selectsend sys._esys_137\n"
 	"type sys._esys_143 {}\n"
-	"type sys._esys_144 {}\n"
-	"type sys._esys_145 *sys.uint8\n"
-	"type sys._isys_735 {sel sys._esys_145}\n"
-	"type sys._esys_142 (sys._esys_143 sys._esys_144 sys._isys_735)\n"
-	"var !sys.selectgo sys._esys_142\n"
-	"type sys._esys_147 {}\n"
-	"type sys._esys_149 [] sys.any\n"
-	"type sys._esys_148 *sys._esys_149\n"
-	"type sys._osys_739 {ary sys._esys_148}\n"
-	"type sys._isys_741 {nel sys.uint32 cap sys.uint32 width sys.uint32}\n"
-	"type sys._esys_146 (sys._esys_147 sys._osys_739 sys._isys_741)\n"
-	"var !sys.newarray sys._esys_146\n"
-	"type sys._esys_151 {}\n"
-	"type sys._esys_153 [] sys.any\n"
-	"type sys._esys_152 *sys._esys_153\n"
-	"type sys._osys_748 {ary sys._esys_152}\n"
+	"type sys._osys_753 {selected sys.bool}\n"
+	"type sys._esys_144 *sys.uint8\n"
+	"type sys._esys_146 1 sys.any\n"
+	"type sys._esys_145 *sys._esys_146\n"
+	"type sys._esys_147 *sys.any\n"
+	"type sys._isys_755 {sel sys._esys_144 hchan sys._esys_145 elem sys._esys_147}\n"
+	"type sys._esys_142 (sys._esys_143 sys._osys_753 sys._isys_755)\n"
+	"var !sys.selectrecv sys._esys_142\n"
+	"type sys._esys_149 {}\n"
+	"type sys._esys_150 {}\n"
+	"type sys._esys_151 *sys.uint8\n"
+	"type sys._isys_762 {sel sys._esys_151}\n"
+	"type sys._esys_148 (sys._esys_149 sys._esys_150 sys._isys_762)\n"
+	"var !sys.selectgo sys._esys_148\n"
+	"type sys._esys_153 {}\n"
 	"type sys._esys_155 [] sys.any\n"
 	"type sys._esys_154 *sys._esys_155\n"
-	"type sys._isys_750 {old sys._esys_154 lb sys.uint32 hb sys.uint32 width sys.uint32}\n"
-	"type sys._esys_150 (sys._esys_151 sys._osys_748 sys._isys_750)\n"
-	"var !sys.arraysliced sys._esys_150\n"
+	"type sys._osys_766 {ary sys._esys_154}\n"
+	"type sys._isys_768 {nel sys.uint32 cap sys.uint32 width sys.uint32}\n"
+	"type sys._esys_152 (sys._esys_153 sys._osys_766 sys._isys_768)\n"
+	"var !sys.newarray sys._esys_152\n"
 	"type sys._esys_157 {}\n"
 	"type sys._esys_159 [] sys.any\n"
 	"type sys._esys_158 *sys._esys_159\n"
-	"type sys._osys_758 {ary sys._esys_158}\n"
-	"type sys._esys_160 *sys.any\n"
-	"type sys._isys_760 {old sys._esys_160 nel sys.uint32 lb sys.uint32 hb sys.uint32 width sys.uint32}\n"
-	"type sys._esys_156 (sys._esys_157 sys._osys_758 sys._isys_760)\n"
-	"var !sys.arrayslices sys._esys_156\n"
-	"type sys._esys_162 {}\n"
-	"type sys._esys_164 [] sys.any\n"
-	"type sys._esys_163 *sys._esys_164\n"
-	"type sys._osys_769 {ary sys._esys_163}\n"
-	"type sys._esys_165 *sys.any\n"
-	"type sys._isys_771 {old sys._esys_165 nel sys.uint32}\n"
-	"type sys._esys_161 (sys._esys_162 sys._osys_769 sys._isys_771)\n"
-	"var !sys.arrays2d sys._esys_161\n"
-	"type sys._esys_167 {}\n"
+	"type sys._osys_775 {ary sys._esys_158}\n"
+	"type sys._esys_161 [] sys.any\n"
+	"type sys._esys_160 *sys._esys_161\n"
+	"type sys._isys_777 {old sys._esys_160 lb sys.uint32 hb sys.uint32 width sys.uint32}\n"
+	"type sys._esys_156 (sys._esys_157 sys._osys_775 sys._isys_777)\n"
+	"var !sys.arraysliced sys._esys_156\n"
+	"type sys._esys_163 {}\n"
+	"type sys._esys_165 [] sys.any\n"
+	"type sys._esys_164 *sys._esys_165\n"
+	"type sys._osys_785 {ary sys._esys_164}\n"
+	"type sys._esys_166 *sys.any\n"
+	"type sys._isys_787 {old sys._esys_166 nel sys.uint32 lb sys.uint32 hb sys.uint32 width sys.uint32}\n"
+	"type sys._esys_162 (sys._esys_163 sys._osys_785 sys._isys_787)\n"
+	"var !sys.arrayslices sys._esys_162\n"
 	"type sys._esys_168 {}\n"
-	"type sys._esys_169 {}\n"
-	"type sys._esys_166 (sys._esys_167 sys._esys_168 sys._esys_169)\n"
-	"var !sys.gosched sys._esys_166\n"
-	"type sys._esys_171 {}\n"
-	"type sys._esys_172 {}\n"
+	"type sys._esys_170 [] sys.any\n"
+	"type sys._esys_169 *sys._esys_170\n"
+	"type sys._osys_796 {ary sys._esys_169}\n"
+	"type sys._esys_171 *sys.any\n"
+	"type sys._isys_798 {old sys._esys_171 nel sys.uint32}\n"
+	"type sys._esys_167 (sys._esys_168 sys._osys_796 sys._isys_798)\n"
+	"var !sys.arrays2d sys._esys_167\n"
 	"type sys._esys_173 {}\n"
-	"type sys._esys_170 (sys._esys_171 sys._esys_172 sys._esys_173)\n"
-	"var !sys.goexit sys._esys_170\n"
+	"type sys._esys_174 {}\n"
 	"type sys._esys_175 {}\n"
-	"type sys._osys_782 {_esys_779 sys.string _esys_780 sys.bool}\n"
-	"type sys._isys_784 {_esys_781 sys.string}\n"
-	"type sys._esys_174 (sys._esys_175 sys._osys_782 sys._isys_784)\n"
-	"var !sys.readfile sys._esys_174\n"
+	"type sys._esys_172 (sys._esys_173 sys._esys_174 sys._esys_175)\n"
+	"var !sys.gosched sys._esys_172\n"
 	"type sys._esys_177 {}\n"
-	"type sys._osys_791 {_esys_788 sys.bool}\n"
-	"type sys._isys_793 {_esys_789 sys.string _esys_790 sys.string}\n"
-	"type sys._esys_176 (sys._esys_177 sys._osys_791 sys._isys_793)\n"
-	"var !sys.writefile sys._esys_176\n"
+	"type sys._esys_178 {}\n"
 	"type sys._esys_179 {}\n"
-	"type sys._osys_803 {_esys_798 sys.int32 _esys_799 sys.int32}\n"
-	"type sys._esys_180 *sys.uint8\n"
-	"type sys._isys_805 {_esys_800 sys._esys_180 _esys_801 sys.int32 _esys_802 sys.int32}\n"
-	"type sys._esys_178 (sys._esys_179 sys._osys_803 sys._isys_805)\n"
-	"var !sys.bytestorune sys._esys_178\n"
-	"type sys._esys_182 {}\n"
-	"type sys._osys_816 {_esys_811 sys.int32 _esys_812 sys.int32}\n"
-	"type sys._isys_818 {_esys_813 sys.string _esys_814 sys.int32 _esys_815 sys.int32}\n"
-	"type sys._esys_181 (sys._esys_182 sys._osys_816 sys._isys_818)\n"
-	"var !sys.stringtorune sys._esys_181\n"
-	"type sys._esys_184 {}\n"
+	"type sys._esys_176 (sys._esys_177 sys._esys_178 sys._esys_179)\n"
+	"var !sys.goexit sys._esys_176\n"
+	"type sys._esys_181 {}\n"
+	"type sys._osys_809 {_esys_806 sys.string _esys_807 sys.bool}\n"
+	"type sys._isys_811 {_esys_808 sys.string}\n"
+	"type sys._esys_180 (sys._esys_181 sys._osys_809 sys._isys_811)\n"
+	"var !sys.readfile sys._esys_180\n"
+	"type sys._esys_183 {}\n"
+	"type sys._osys_818 {_esys_815 sys.bool}\n"
+	"type sys._isys_820 {_esys_816 sys.string _esys_817 sys.string}\n"
+	"type sys._esys_182 (sys._esys_183 sys._osys_818 sys._isys_820)\n"
+	"var !sys.writefile sys._esys_182\n"
 	"type sys._esys_185 {}\n"
-	"type sys._isys_824 {ms sys.int64}\n"
-	"type sys._esys_183 (sys._esys_184 sys._esys_185 sys._isys_824)\n"
-	"var !sys.sleep sys._esys_183\n"
-	"type sys._esys_187 {}\n"
+	"type sys._osys_830 {_esys_825 sys.int32 _esys_826 sys.int32}\n"
+	"type sys._esys_186 *sys.uint8\n"
+	"type sys._isys_832 {_esys_827 sys._esys_186 _esys_828 sys.int32 _esys_829 sys.int32}\n"
+	"type sys._esys_184 (sys._esys_185 sys._osys_830 sys._isys_832)\n"
+	"var !sys.bytestorune sys._esys_184\n"
 	"type sys._esys_188 {}\n"
-	"type sys._isys_829 {_esys_828 sys.int32}\n"
-	"type sys._esys_186 (sys._esys_187 sys._esys_188 sys._isys_829)\n"
-	"var !sys.exit sys._esys_186\n"
+	"type sys._osys_843 {_esys_838 sys.int32 _esys_839 sys.int32}\n"
+	"type sys._isys_845 {_esys_840 sys.string _esys_841 sys.int32 _esys_842 sys.int32}\n"
+	"type sys._esys_187 (sys._esys_188 sys._osys_843 sys._isys_845)\n"
+	"var !sys.stringtorune sys._esys_187\n"
 	"type sys._esys_190 {}\n"
 	"type sys._esys_191 {}\n"
-	"type sys._esys_192 {}\n"
-	"type sys._esys_189 (sys._esys_190 sys._esys_191 sys._esys_192)\n"
+	"type sys._isys_851 {ms sys.int64}\n"
+	"type sys._esys_189 (sys._esys_190 sys._esys_191 sys._isys_851)\n"
+	"var !sys.sleep sys._esys_189\n"
+	"type sys._esys_193 {}\n"
+	"type sys._esys_194 {}\n"
+	"type sys._isys_856 {_esys_855 sys.int32}\n"
+	"type sys._esys_192 (sys._esys_193 sys._esys_194 sys._isys_856)\n"
+	"var !sys.exit sys._esys_192\n"
+	"type sys._esys_196 {}\n"
+	"type sys._esys_197 {}\n"
+	"type sys._esys_198 {}\n"
+	"type sys._esys_195 (sys._esys_196 sys._esys_197 sys._esys_198)\n"
 	"))\n"
 ;
diff --git a/src/cmd/gc/walk.c b/src/cmd/gc/walk.c
index 2bf23de211f..3856539ab32 100644
--- a/src/cmd/gc/walk.c
+++ b/src/cmd/gc/walk.c
@@ -10,6 +10,14 @@ static	Type*	sw3(Node*, Type*);
 static	Node*	curfn;
 static	Node*	addtop;
 
+enum
+{
+	Inone,
+	I2T,
+	I2I,
+	T2I
+};
+
 // can this code branch reach the end
 // without an undcontitional RETURN
 // this is hard, so it is conservative
@@ -494,15 +502,6 @@ loop:
 	case OINDREG:
 		goto ret;
 
-	case OS2I:
-	case OI2S:
-	case OI2I:
-		if(top != Erv)
-			goto nottop;
-		n->addable = 0;
-		walktype(n->left, Erv);
-		goto ret;
-
 	case OCONV:
 		if(top == Etop)
 			goto nottop;
@@ -551,9 +550,9 @@ loop:
 			goto ret;
 
 		// interface and structure
-		r = isandss(n->type, l);
-		if(r != N) {
-			indir(n, r);
+		et = isandss(n->type, l);
+		if(et != Inone) {
+			indir(n, ifaceop(n->type, l, et));
 			goto ret;
 		}
 
@@ -2454,18 +2453,7 @@ arrayop(Node *n, int top)
 	return r;
 }
 
-void
-diagnamed(Type *t)
-{
-	if(isinter(t))
-		if(t->sym == S)
-			yyerror("interface type must be named");
-	if(ismethod(t))
-		if(t->type == T || t->type->sym == S)
-			yyerror("structure type must be named");
-}
-
-Node*
+int
 isandss(Type *lt, Node *r)
 {
 	Type *rt;
@@ -2474,32 +2462,98 @@ isandss(Type *lt, Node *r)
 
 	rt = r->type;
 	if(isinter(lt)) {
-		if(ismethod(rt)) {
-			o = OS2I;
-			goto ret;
-		}
-		if(isinter(rt)) {
-			o = OI2I;
-			goto ret;
-		}
+		if(ismethod(rt))
+			return T2I;
+		if(isinter(rt) && !eqtype(rt, lt, 0))
+			return I2I;
 	}
 
 	if(ismethod(lt)) {
-		if(isinter(rt)) {
-			o = OI2S;
-			goto ret;
-		}
+		if(isinter(rt))
+			return I2T;
 	}
 
-	return N;
+	return Inone;
+}
 
-ret:
-	diagnamed(lt);
-	diagnamed(rt);
+Node*
+ifaceop(Type *tl, Node *n, int op)
+{
+	Type *tr;
+	Node *r, *a, *on;
+	Sym *s;
 
-	n = nod(o, r, N);
-	n->type = lt;
-	return n;
+	tr = n->type;
+
+	switch(op) {
+	default:
+		fatal("ifaceop: unknown op %d\n", op);
+
+	case I2T:
+		// ifaceI2T(sigt *byte, iface interface{}) (ret any);
+
+		a = n;				// interface
+		r = a;
+
+		s = signame(tl);		// sigi
+		if(s == S)
+			fatal("ifaceop: signame I2T");
+		a = s->oname;
+		a = nod(OADDR, a, N);
+		r = list(a, r);
+
+		on = syslook("ifaceI2T", 1);
+		argtype(on, tl);
+
+		break;
+
+	case T2I:
+		// ifaceT2I(sigi *byte, sigt *byte, elem any) (ret interface{});
+
+		a = n;				// elem
+		r = a;
+
+		s = signame(tr);		// sigt
+		if(s == S)
+			fatal("ifaceop: signame-1 T2I: %lT", tr);
+		a = s->oname;
+		a = nod(OADDR, a, N);
+		r = list(a, r);
+
+		s = signame(tl);		// sigi
+		if(s == S) {
+			fatal("ifaceop: signame-2 T2I: %lT", tl);
+		}
+		a = s->oname;
+		a = nod(OADDR, a, N);
+		r = list(a, r);
+
+		on = syslook("ifaceT2I", 1);
+		argtype(on, tr);
+
+		break;
+
+	case I2I:
+		// ifaceI2I(sigi *byte, iface any-1) (ret any-2);
+
+		a = n;				// interface
+		r = a;
+		s = signame(tr);		// sigi
+		if(s == S)
+			fatal("ifaceop: signame I2I");
+		a = s->oname;
+		a = nod(OADDR, a, N);
+		r = list(a, r);
+		on = syslook("ifaceI2I", 1);
+		argtype(on, n->type);
+		argtype(on, tr);
+
+		break;
+	}
+
+	r = nod(OCALL, on, r);
+	walktype(r, Erv);
+	return r;
 }
 
 Node*
@@ -2507,6 +2561,7 @@ convas(Node *n)
 {
 	Node *l, *r;
 	Type *lt, *rt;
+	int et;
 
 	if(n->op != OAS)
 		fatal("convas: not OAS %O", n->op);
@@ -2542,10 +2597,9 @@ convas(Node *n)
 	if(eqtype(lt, rt, 0))
 		goto out;
 
-	r = isandss(lt, r);
-	if(r != N) {
-		n->right = r;
-		walktype(n, Etop);
+	et = isandss(lt, r);
+	if(et != Inone) {
+		n->right = ifaceop(lt, r, et);
 		goto out;
 	}
 
@@ -2994,11 +3048,15 @@ arraylit(Node *n)
 		fatal("arraylit: not array");
 
 	if(t->bound < 0) {
+		// make a shallow copy
+		t = typ(0);
+		*t = *n->type;
+		n->type = t;
+
 		// make it a closed array
 		r = listfirst(&saver, &n->left);
 		for(idx=0; r!=N; idx++)
 			r = listnext(&saver);
-		t = deep(t);
 		t->bound = idx;
 	}
 
diff --git a/src/runtime/Makefile b/src/runtime/Makefile
index d70a4baf779..2cdb4a97937 100644
--- a/src/runtime/Makefile
+++ b/src/runtime/Makefile
@@ -20,6 +20,7 @@ LIBOFILES=\
 	runtime.$O\
 	map.$O\
 	chan.$O\
+	iface.$O\
 	array.$O\
 	print.$O\
 	rune.$O\
diff --git a/src/runtime/iface.c b/src/runtime/iface.c
new file mode 100644
index 00000000000..c4d1014e302
--- /dev/null
+++ b/src/runtime/iface.c
@@ -0,0 +1,211 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#include "runtime.h"
+
+typedef	struct	Sigt	Sigt;
+typedef	struct	Sigi	Sigi;
+typedef	struct	Map	Map;
+
+struct	Sigt
+{
+	byte*	name;
+	uint32	hash;
+	void	(*fun)(void);
+};
+
+struct	Sigi
+{
+	byte*	name;
+	uint32	hash;
+	uint32	offset;
+};
+
+struct	Map
+{
+	Sigi*	sigi;
+	Sigt*	sigt;
+	Map*	link;
+	int32	bad;
+	int32	unused;
+	void	(*fun[])(void);
+};
+
+static	Map*	hash[1009];
+static	int32	debug	= 0;
+
+static Map*
+hashmap(Sigi *si, Sigt *ss)
+{
+	int32 ns, ni;
+	uint32 ihash, h;
+	byte *sname, *iname;
+	Map *m;
+
+	h = ((uint32)(uint64)si + (uint32)(uint64)ss) % nelem(hash);
+	for(m=hash[h]; m!=nil; m=m->link) {
+		if(m->sigi == si && m->sigt == ss) {
+			if(m->bad) {
+				throw("bad hashmap");
+				m = nil;
+			}
+			// prints("old hashmap\n");
+			return m;
+		}
+	}
+
+	ni = si[0].offset;	// first word has size
+	m = mal(sizeof(*m) + ni*sizeof(m->fun[0]));
+	m->sigi = si;
+	m->sigt = ss;
+
+	ni = 1;			// skip first word
+	ns = 0;
+
+loop1:
+	// pick up next name from
+	// interface signature
+	iname = si[ni].name;
+	if(iname == nil) {
+		m->link = hash[h];
+		hash[h] = m;
+		// prints("new hashmap\n");
+		return m;
+	}
+	ihash = si[ni].hash;
+
+loop2:
+	// pick up and comapre next name
+	// from structure signature
+	sname = ss[ns].name;
+	if(sname == nil) {
+		prints((int8*)iname);
+		prints(": ");
+		throw("hashmap: failed to find method");
+		m->bad = 1;
+		m->link = hash[h];
+		hash[h] = m;
+		return nil;
+	}
+
+	if(ihash != ss[ns].hash ||
+	   strcmp(sname, iname) != 0) {
+		ns++;
+		goto loop2;
+	}
+
+	m->fun[si[ni].offset] = ss[ns].fun;
+	ni++;
+	goto loop1;
+}
+
+static void
+printsigi(Sigi *si)
+{
+	sys·printpointer(si);
+}
+
+static void
+printsigt(Sigt *st)
+{
+	sys·printpointer(st);
+}
+
+static void
+printiface(Map *im, void *it)
+{
+	prints("(");
+	sys·printpointer(im);
+	prints(",");
+	sys·printpointer(it);
+	prints(")");
+}
+
+// ifaceT2I(sigi *byte, sigt *byte, elem any) (ret interface{});
+void
+sys·ifaceT2I(Sigi *si, Sigt *st, void *elem, Map *retim, void *retit)
+{
+
+	if(debug) {
+		prints("T2I sigi=");
+		printsigi(si);
+		prints(" sigt=");
+		printsigt(st);
+		prints(" elem=");
+		sys·printpointer(elem);
+		prints("\n");
+	}
+
+	retim = hashmap(si, st);
+	retit = elem;
+
+	if(debug) {
+		prints("T2I ret=");
+		printiface(retim, retit);
+		prints("\n");
+	}
+
+	FLUSH(&retim);
+}
+
+// ifaceI2T(sigt *byte, iface interface{}) (ret any);
+void
+sys·ifaceI2T(Sigt *st, Map *im, void *it, void *ret)
+{
+
+	if(debug) {
+		prints("I2T sigt=");
+		printsigt(st);
+		prints(" iface=");
+		printiface(im, it);
+		prints("\n");
+	}
+
+	if(im == nil)
+		throw("ifaceI2T: nil map");
+
+	if(im->sigt != st)
+		throw("ifaceI2T: wrong type");
+
+	ret = it;
+	if(debug) {
+		prints("I2T ret=");
+		sys·printpointer(ret);
+		prints("\n");
+	}
+
+	FLUSH(&ret);
+}
+
+// ifaceI2I(sigi *byte, iface interface{}) (ret interface{});
+void
+sys·ifaceI2I(Sigi *si, Map *im, void *it, Map *retim, void *retit)
+{
+
+	if(debug) {
+		prints("I2I sigi=");
+		sys·printpointer(si);
+		prints(" iface=");
+		printiface(im, it);
+		prints("\n");
+	}
+
+	if(im == nil) {
+		throw("ifaceI2I: nil map");
+		return;
+	}
+
+	retit = it;
+	retim = im;
+	if(im->sigi != si)
+		retim = hashmap(si, im->sigt);
+
+	if(debug) {
+		prints("I2I ret=");
+		printiface(retim, retit);
+		prints("\n");
+	}
+
+	FLUSH(&retim);
+}
diff --git a/src/runtime/runtime.c b/src/runtime/runtime.c
index 8b4ebe41f42..2cbebda2190 100644
--- a/src/runtime/runtime.c
+++ b/src/runtime/runtime.c
@@ -4,7 +4,6 @@
 
 #include "runtime.h"
 
-int32	debug	= 0;
 int32	panicking = 0;
 
 void
@@ -146,175 +145,6 @@ sys·mal(uint32 n, uint8 *ret)
 	FLUSH(&ret);
 }
 
-static	Map*	hash[1009];
-
-static Map*
-hashmap(Sigi *si, Sigs *ss)
-{
-	int32 ns, ni;
-	uint32 ihash, h;
-	byte *sname, *iname;
-	Map *m;
-
-	h = ((uint32)(uint64)si + (uint32)(uint64)ss) % nelem(hash);
-	for(m=hash[h]; m!=nil; m=m->link) {
-		if(m->si == si && m->ss == ss) {
-			if(m->bad) {
-				throw("bad hashmap");
-				m = nil;
-			}
-			// prints("old hashmap\n");
-			return m;
-		}
-	}
-
-	ni = si[0].offset;	// first word has size
-	m = mal(sizeof(*m) + ni*sizeof(m->fun[0]));
-	m->si = si;
-	m->ss = ss;
-
-	ni = 1;			// skip first word
-	ns = 0;
-
-loop1:
-	// pick up next name from
-	// interface signature
-	iname = si[ni].name;
-	if(iname == nil) {
-		m->link = hash[h];
-		hash[h] = m;
-		// prints("new hashmap\n");
-		return m;
-	}
-	ihash = si[ni].hash;
-
-loop2:
-	// pick up and comapre next name
-	// from structure signature
-	sname = ss[ns].name;
-	if(sname == nil) {
-		prints((int8*)iname);
-		prints(": ");
-		throw("hashmap: failed to find method");
-		m->bad = 1;
-		m->link = hash[h];
-		hash[h] = m;
-		return nil;
-	}
-
-	if(ihash != ss[ns].hash ||
-	   strcmp(sname, iname) != 0) {
-		ns++;
-		goto loop2;
-	}
-
-	m->fun[si[ni].offset] = ss[ns].fun;
-	ni++;
-	goto loop1;
-}
-
-void
-sys·ifaces2i(Sigi *si, Sigs *ss, Map *m, void *s)
-{
-
-	if(debug) {
-		prints("s2i sigi=");
-		sys·printpointer(si);
-		prints(" sigs=");
-		sys·printpointer(ss);
-		prints(" s=");
-		sys·printpointer(s);
-	}
-
-	if(s == nil) {
-		throw("ifaces2i: nil pointer");
-		m = nil;
-		FLUSH(&m);
-		return;
-	}
-
-	m = hashmap(si, ss);
-
-	if(debug) {
-		prints(" returning m=");
-		sys·printpointer(m);
-		prints(" s=");
-		sys·printpointer(s);
-		prints("\n");
-		dump((byte*)m, 64);
-	}
-
-	FLUSH(&m);
-}
-
-void
-sys·ifacei2i(Sigi *si, Map *m, void *s)
-{
-
-	if(debug) {
-		prints("i2i sigi=");
-		sys·printpointer(si);
-		prints(" m=");
-		sys·printpointer(m);
-		prints(" s=");
-		sys·printpointer(s);
-	}
-
-	if(m == nil) {
-		throw("ifacei2i: nil map");
-		s = nil;
-		FLUSH(&s);
-		return;
-	}
-
-	if(m->si == nil) {
-		throw("ifacei2i: nil pointer");
-		return;
-	}
-
-	if(m->si != si) {
-		m = hashmap(si, m->ss);
-		FLUSH(&m);
-	}
-
-	if(debug) {
-		prints(" returning m=");
-		sys·printpointer(m);
-		prints(" s=");
-		sys·printpointer(s);
-		prints("\n");
-		dump((byte*)m, 64);
-	}
-}
-
-void
-sys·ifacei2s(Sigs *ss, Map *m, void *s)
-{
-
-	if(debug) {
-		prints("i2s m=");
-		sys·printpointer(m);
-		prints(" s=");
-		sys·printpointer(s);
-		prints("\n");
-	}
-
-	if(m == nil) {
-		throw("ifacei2s: nil map");
-		s = nil;
-		FLUSH(&s);
-		return;
-	}
-
-	if(m->ss != ss) {
-		dump((byte*)m, 64);
-		throw("ifacei2s: wrong pointer");
-		s = nil;
-		FLUSH(&s);
-		return;
-	}
-}
-
 enum
 {
 	NANEXP		= 2047<<20,
diff --git a/src/runtime/runtime.h b/src/runtime/runtime.h
index 8ead7dd237e..04f1737dd04 100644
--- a/src/runtime/runtime.h
+++ b/src/runtime/runtime.h
@@ -34,9 +34,6 @@ typedef	double			float64;
 typedef	uint8			bool;
 typedef	uint8			byte;
 typedef	struct	String		*string;
-typedef	struct	Sigs		Sigs;
-typedef	struct	Sigi		Sigi;
-typedef	struct	Map		Map;
 typedef	struct	Array		Array;
 typedef	struct	Gobuf		Gobuf;
 typedef	struct	G		G;
@@ -95,18 +92,6 @@ struct String
 	int32	len;
 	byte	str[1];
 };
-struct	Sigs
-{
-	byte*	name;
-	uint32	hash;
-	void	(*fun)(void);
-};
-struct	Sigi
-{
-	byte*	name;
-	uint32	hash;
-	uint32	offset;
-};
 
 struct	Array
 {				// must not move anything
@@ -115,15 +100,6 @@ struct	Array
 	uint32	cap;		// allocate3d number of elements
 	byte	b[8];		// actual array - may not be contig
 };
-struct	Map
-{
-	Sigi*	si;
-	Sigs*	ss;
-	Map*	link;
-	int32	bad;
-	int32	unused;
-	void	(*fun[])(void);
-};
 struct	Gobuf
 {
 	byte*	SP;
@@ -305,9 +281,6 @@ void	sys·cmpstring(string, string, int32);
 void	sys·slicestring(string, int32, int32, string);
 void	sys·indexstring(string, int32, byte);
 void	sys·intstring(int64, string);
-void	sys·ifaces2i(Sigi*, Sigs*, Map*, void*);
-void	sys·ifacei2i(Sigi*, Map*, void*);
-void	sys·ifacei2s(Sigs*, Map*, void*);
 
 /*
  * User go-called