From 5ff4c17907d5b19510a62e08fd8d3b11e62b431d Mon Sep 17 00:00:00 2001
From: Ondřej Surý <ondrej@sury.org>
Date: Tue, 13 Sep 2011 13:13:40 +0200
Subject: Imported Upstream version 60

---
 src/cmd/gc/bits.c | 161 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 161 insertions(+)
 create mode 100644 src/cmd/gc/bits.c

(limited to 'src/cmd/gc/bits.c')

diff --git a/src/cmd/gc/bits.c b/src/cmd/gc/bits.c
new file mode 100644
index 000000000..7188ac411
--- /dev/null
+++ b/src/cmd/gc/bits.c
@@ -0,0 +1,161 @@
+// Inferno utils/cc/bits.c
+// http://code.google.com/p/inferno-os/source/browse/utils/cc/bits.c
+//
+//	Copyright © 1994-1999 Lucent Technologies Inc.  All rights reserved.
+//	Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
+//	Portions Copyright © 1997-1999 Vita Nuova Limited
+//	Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
+//	Portions Copyright © 2004,2006 Bruce Ellis
+//	Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
+//	Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
+//	Portions Copyright © 2009 The Go Authors.  All rights reserved.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#include "go.h"
+
+/*
+Bits
+bor(Bits a, Bits b)
+{
+	Bits c;
+	int i;
+
+	for(i=0; i<BITS; i++)
+		c.b[i] = a.b[i] | b.b[i];
+	return c;
+}
+
+Bits
+band(Bits a, Bits b)
+{
+	Bits c;
+	int i;
+
+	for(i=0; i<BITS; i++)
+		c.b[i] = a.b[i] & b.b[i];
+	return c;
+}
+
+Bits
+bnot(Bits a)
+{
+	Bits c;
+	int i;
+
+	for(i=0; i<BITS; i++)
+		c.b[i] = ~a.b[i];
+	return c;
+}
+*/
+
+int
+bany(Bits *a)
+{
+	int i;
+
+	for(i=0; i<BITS; i++)
+		if(a->b[i])
+			return 1;
+	return 0;
+}
+
+/*
+int
+beq(Bits a, Bits b)
+{
+	int i;
+
+	for(i=0; i<BITS; i++)
+		if(a.b[i] != b.b[i])
+			return 0;
+	return 1;
+}
+*/
+
+int
+bnum(Bits a)
+{
+	int i;
+	int32 b;
+
+	for(i=0; i<BITS; i++)
+		if(b = a.b[i])
+			return 32*i + bitno(b);
+	fatal("bad in bnum");
+	return 0;
+}
+
+Bits
+blsh(uint n)
+{
+	Bits c;
+
+	c = zbits;
+	c.b[n/32] = 1L << (n%32);
+	return c;
+}
+
+/*
+int
+bset(Bits a, uint n)
+{
+	if(a.b[n/32] & (1L << (n%32)))
+		return 1;
+	return 0;
+}
+*/
+
+int
+bitno(int32 b)
+{
+	int i;
+
+	for(i=0; i<32; i++)
+		if(b & (1L<<i))
+			return i;
+	fatal("bad in bitno");
+	return 0;
+}
+
+int
+Qconv(Fmt *fp)
+{
+	Bits bits;
+	int i, first;
+
+	first = 1;
+	bits = va_arg(fp->args, Bits);
+	while(bany(&bits)) {
+		i = bnum(bits);
+		if(first)
+			first = 0;
+		else
+			fmtprint(fp, " ");
+		if(var[i].sym == S)
+			fmtprint(fp, "$%lld", var[i].offset);
+		else {
+			fmtprint(fp, var[i].sym->name);
+			if(var[i].offset != 0)
+				fmtprint(fp, "%+d", var[i].offset);
+		}
+		bits.b[i/32] &= ~(1L << (i%32));
+	}
+	return 0;
+}
-- 
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