floating point calc, added a few more packages that pass

go/test: passes 80% (274/340)

R=rsc
APPROVED=rsc
DELTA=61  (59 added, 0 deleted, 2 changed)
OCL=35506
CL=35517

src/cmd/5g/cgen.c

@@ -42,7 +42,7 @@ void
 cgen(Node *n, Node *res)
 {
 	Node *nl, *nr, *r;
-	Node n1, n2, n3;
+	Node n1, n2, n3, f0, f1;
 	int a, w;
 	Prog *p1, *p2, *p3;
 	Addr addr;
@@ -180,6 +180,9 @@ cgen(Node *n, Node *res)
 		}
 	}
 
+	if(nl != N && isfloat[n->type->etype] && isfloat[nl->type->etype])
+		goto flt;
+
 	switch(n->op) {
 	default:
 		dump("cgen", n);
@@ -372,6 +375,45 @@ abop:	// asymmetric binary
 	regfree(&n2);
 	goto ret;
 
+flt:	// floating-point.
+	regalloc(&f0, nl->type, res);
+	if(nr != N)
+		goto flt2;
+
+	if(n->op == OMINUS) {
+		nr = nodintconst(-1);
+		convlit(&nr, n->type);
+		n->op = OMUL;
+		goto flt2;
+	}
+
+	// unary
+	cgen(nl, &f0);
+	if(n->op != OCONV && n->op != OPLUS)
+		gins(optoas(n->op, n->type), &f0, &f0);
+	gmove(&f0, res);
+	regfree(&f0);
+	goto ret;
+
+flt2:	// binary
+	if(nl->ullman >= nr->ullman) {
+		cgen(nl, &f0);
+		regalloc(&f1, n->type, N);
+		gmove(&f0, &f1);
+		cgen(nr, &f0);
+		gins(optoas(n->op, n->type), &f1, &f0);
+	} else {
+		cgen(nr, &f0);
+		regalloc(&f1, n->type, N);
+		gmove(&f0, &f1);
+		cgen(nl, &f0);
+		gins(optoas(n->op, n->type), &f1, &f0);
+	}
+	gmove(&f1, res);
+	regfree(&f0);
+	regfree(&f1);
+	goto ret;
+
 ret:
 	;
 }

src/make-arm.bash

@@ -21,7 +21,7 @@ chmod +x $GOBIN/quietgcc
 
 # TODO(kaib): converge with normal build
 #for i in lib9 libbio libmach libregexp cmd pkg cmd/ebnflint cmd/godoc cmd/gofmt
-for i in lib9 libbio libmach libregexp cmd pkg/runtime pkg/sync pkg/once pkg/syscall pkg/os pkg/unicode pkg/utf8 pkg/bytes pkg/strings pkg/io
+for i in lib9 libbio libmach libregexp cmd pkg/runtime pkg/sync pkg/once pkg/syscall pkg/os pkg/unicode pkg/utf8 pkg/bytes pkg/strings pkg/io pkg/malloc pkg/time
 #for i in lib9 libbio libmach libregexp cmd pkg/runtime pkg/sync pkg/once pkg/malloc pkg/sort pkg/unicode
 # pkg/hash
 # pkg/math

test/arm-pass.txt

 64bit.go
+args.go
 assign.go
 bigalg.go
 blank1.go
@@ -10,6 +11,7 @@ bugs/bug193.go
 bugs/bug196.go
 bugs/bug198.go
 chan/perm.go
+char_lit.go
 cmp1.go
 cmp2.go
 cmp3.go
@@ -32,6 +34,7 @@ fixedbugs/bug002.go
 fixedbugs/bug003.go
 fixedbugs/bug004.go
 fixedbugs/bug005.go
+fixedbugs/bug006.go
 fixedbugs/bug007.go
 fixedbugs/bug008.go
 fixedbugs/bug009.go
@@ -47,6 +50,7 @@ fixedbugs/bug022.go
 fixedbugs/bug023.go
 fixedbugs/bug024.go
 fixedbugs/bug026.go
+fixedbugs/bug027.go
 fixedbugs/bug028.go
 fixedbugs/bug030.go
 fixedbugs/bug031.go
@@ -64,9 +68,11 @@ fixedbugs/bug050.go
 fixedbugs/bug051.go
 fixedbugs/bug052.go
 fixedbugs/bug053.go
+fixedbugs/bug054.go
 fixedbugs/bug056.go
 fixedbugs/bug057.go
 fixedbugs/bug058.go
+fixedbugs/bug060.go
 fixedbugs/bug061.go
 fixedbugs/bug062.go
 fixedbugs/bug063.go
@@ -156,6 +162,7 @@ fixedbugs/bug156.go
 fixedbugs/bug157.go
 fixedbugs/bug158.go
 fixedbugs/bug159.go
+fixedbugs/bug160.go
 fixedbugs/bug161.go
 fixedbugs/bug163.go
 fixedbugs/bug164.go
@@ -178,6 +185,7 @@ fixedbugs/bug182.go
 fixedbugs/bug183.go
 fixedbugs/bug185.go
 fixedbugs/bug186.go
+fixedbugs/bug187.go
 fixedbugs/bug188.go
 fixedbugs/bug189.go
 fixedbugs/bug191.go
@@ -198,20 +206,26 @@ func1.go
 func2.go
 func3.go
 func4.go
+gc.go
 gc1.go
 hashmap.go
 helloworld.go
 if.go
+if1.go
 import.go
 import1.go
 indirect.go
 indirect1.go
 initcomma.go
 initializerr.go
+initsyscall.go
+int_lit.go
 intcvt.go
+interface/bigdata.go
 interface/convert.go
 interface/convert1.go
 interface/convert2.go
+interface/embed.go
 interface/explicit.go
 interface/fail.go
 interface/pointer.go
@@ -251,7 +265,10 @@ parentype.go
 printbig.go
 rename1.go
 sieve.go
+sigchld.go
 simassign.go
+string_lit.go
 switch.go
+switch1.go
 test0.go
 varinit.go