--- /sys/src/9/bcm/main.c	Fri Jul 26 00:49:36 2013
+++ /sys/src/9/bcm/main.c	Fri Sep 20 23:38:39 2013
@@ -17,7 +17,7 @@
 
 /* Firmware compatibility */
 #define	Minfirmrev	326770
-#define	Minfirmdate	"22 Jul 2012"
+#define	Minfirmdate	"19 Aug 2013"
 
 /*
  * Where configuration info is left for the loaded programme.
@@ -245,8 +245,8 @@
 	rev = getfirmware();
 	print("firmware: rev %d\n", rev);
 	if(rev < Minfirmrev){
-		print("Sorry, firmware (start.elf) must be at least rev %d (%s)\n",
-			Minfirmrev, Minfirmdate);
+		print("Sorry, firmware (start*.elf) must be at least rev %d"
+		      " or newer than %s\n", Minfirmrev, Minfirmdate);
 		for(;;)
 			;
 	}
--- /sys/src/cmd/5c/cgen.c	Wed Jul  4 19:35:53 2007
+++ /sys/src/cmd/5c/cgen.c	Fri Sep 20 23:44:32 2013
@@ -701,7 +701,7 @@
 		if(true)
 			o = comrel[relindex(o)];
 		if(typefd[n->type->etype]) {
-			gopcode(o, nodfconst(0), &nod, Z);
+			gopcode(true ? o | BTRUE : o, nodfconst(0), &nod, Z);
 		} else
 			gopcode(o, nodconst(0), &nod, Z);
 		regfree(&nod);
@@ -800,14 +800,14 @@
 			regalloc(&nod, r, nn);
 			cgenrel(r, &nod, 1);
 			o = invrel[relindex(o)];
-			gopcode(o, l, &nod, Z);
+			gopcode(true ? o | BTRUE : o, l, &nod, Z);
 			regfree(&nod);
 			goto com;
 		}
 		if(sconst(r)) {
 			regalloc(&nod, l, nn);
 			cgenrel(l, &nod, 1);
-			gopcode(o, r, &nod, Z);
+			gopcode(true ? o | BTRUE : o, r, &nod, Z);
 			regfree(&nod);
 			goto com;
 		}
@@ -822,7 +822,7 @@
 			regalloc(&nod1, l, Z);
 			cgenrel(l, &nod1, 1);
 		}
-		gopcode(o, &nod, &nod1, Z);
+		gopcode(true ? o | BTRUE : o, &nod, &nod1, Z);
 		regfree(&nod);
 		regfree(&nod1);
 
--- /sys/src/cmd/5c/gc.h	Fri Jun 14 00:34:01 2013
+++ /sys/src/cmd/5c/gc.h	Fri Sep 20 23:44:32 2013
@@ -14,6 +14,7 @@
 #define	SZ_VLONG	8
 #define	SZ_DOUBLE	8
 #define	FNX		100
+#define	BTRUE		0x1000
 
 typedef	struct	Adr	Adr;
 typedef	struct	Prog	Prog;
--- /sys/src/cmd/5c/txt.c	Fri Jan 25 00:53:39 2013
+++ /sys/src/cmd/5c/txt.c	Fri Sep 20 23:44:32 2013
@@ -929,12 +929,14 @@
 void
 gopcode(int o, Node *f1, Node *f2, Node *t)
 {
-	int a, et;
+	int a, et, true;
 	Adr ta;
 
 	et = TLONG;
 	if(f1 != Z && f1->type != T)
 		et = f1->type->etype;
+	true = o & BTRUE;
+	o &= ~BTRUE;
 	a = AGOK;
 	switch(o) {
 	case OAS:
@@ -1076,15 +1078,24 @@
 			break;
 		case OLT:
 			a = ABLT;
+			/* ensure NaN comparison is always false */
+			if(typefd[et] && !true)
+				a = ABMI;
 			break;
 		case OLE:
 			a = ABLE;
+			if(typefd[et] && !true)
+				a = ABLS;
 			break;
 		case OGE:
 			a = ABGE;
+			if(typefd[et] && true)
+				a = ABPL;
 			break;
 		case OGT:
 			a = ABGT;
+			if(typefd[et] && true)
+				a = ABHI;
 			break;
 		case OLO:
 			a = ABLO;