mesa: Re-add main/bitset.h to fix classic nouveau build failure.

bitset.h is still used by classic nouveau -- see `git grep '\<BITSET_'`
-- and the state stored is too big to fit in 64bit integers (it requires
approximately 87 bits), so there is no obvious alternative here.

This effecively reverts commit 196800d79829a420073f762fac90090a7b416d2d.

2 files changed, 162 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/nouveau/nouveau_context.h b/src/mesa/drivers/dri/nouveau/nouveau_context.h
index cc97d3dc7b8..7ebc676379e 100644
--- a/src/mesa/drivers/dri/nouveau/nouveau_context.h
+++ b/src/mesa/drivers/dri/nouveau/nouveau_context.h
@@ -33,6 +33,8 @@
 #include "nouveau_scratch.h"
 #include "nouveau_render.h"
 
+#include "main/bitset.h"
+
 enum nouveau_fallback {
 	HWTNL = 0,
 	SWTNL,
diff --git a/src/mesa/main/bitset.h b/src/mesa/main/bitset.h
new file mode 100644
index 00000000000..c27b4c474e0
--- /dev/null
+++ b/src/mesa/main/bitset.h
@@ -0,0 +1,160 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  6.5
+ *
+ * Copyright (C) 2006  Brian Paul   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
+ * BRIAN PAUL 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.
+ */
+
+/**
+ * \file bitset.h
+ * \brief Bitset of arbitrary size definitions.
+ * \author Michal Krol
+ */
+
+#ifndef BITSET_H
+#define BITSET_H
+
+#include "imports.h"
+
+/****************************************************************************
+ * generic bitset implementation
+ */
+
+#define BITSET_WORD GLuint
+#define BITSET_WORDBITS (sizeof (BITSET_WORD) * 8)
+
+/* bitset declarations
+ */
+#define BITSET_DECLARE(name, size) \
+   BITSET_WORD name[((size) + BITSET_WORDBITS - 1) / BITSET_WORDBITS]
+
+/* bitset operations
+ */
+#define BITSET_COPY(x, y) memcpy( (x), (y), sizeof (x) )
+#define BITSET_EQUAL(x, y) (memcmp( (x), (y), sizeof (x) ) == 0)
+#define BITSET_ZERO(x) memset( (x), 0, sizeof (x) )
+#define BITSET_ONES(x) memset( (x), 0xff, sizeof (x) )
+
+#define BITSET_BITWORD(b) ((b) / BITSET_WORDBITS)
+#define BITSET_BIT(b) (1 << ((b) % BITSET_WORDBITS))
+
+/* single bit operations
+ */
+#define BITSET_TEST(x, b) ((x)[BITSET_BITWORD(b)] & BITSET_BIT(b))
+#define BITSET_SET(x, b) ((x)[BITSET_BITWORD(b)] |= BITSET_BIT(b))
+#define BITSET_CLEAR(x, b) ((x)[BITSET_BITWORD(b)] &= ~BITSET_BIT(b))
+
+#define BITSET_MASK(b) ((b) == BITSET_WORDBITS ? ~0 : BITSET_BIT(b) - 1)
+#define BITSET_RANGE(b, e) (BITSET_MASK((e) + 1) & ~BITSET_MASK(b))
+
+/* bit range operations
+ */
+#define BITSET_TEST_RANGE(x, b, e) \
+   (BITSET_BITWORD(b) == BITSET_BITWORD(e) ? \
+   ((x)[BITSET_BITWORD(b)] & BITSET_RANGE(b, e)) : \
+   (assert (!"BITSET_TEST_RANGE: bit range crosses word boundary"), 0))
+#define BITSET_SET_RANGE(x, b, e) \
+   (BITSET_BITWORD(b) == BITSET_BITWORD(e) ? \
+   ((x)[BITSET_BITWORD(b)] |= BITSET_RANGE(b, e)) : \
+   (assert (!"BITSET_SET_RANGE: bit range crosses word boundary"), 0))
+#define BITSET_CLEAR_RANGE(x, b, e) \
+   (BITSET_BITWORD(b) == BITSET_BITWORD(e) ? \
+   ((x)[BITSET_BITWORD(b)] &= ~BITSET_RANGE(b, e)) : \
+   (assert (!"BITSET_CLEAR_RANGE: bit range crosses word boundary"), 0))
+
+/* Get first bit set in a bitset.
+ */
+static inline int
+__bitset_ffs(const BITSET_WORD *x, int n)
+{
+   int i;
+
+   for (i = 0; i < n; i++) {
+      if (x[i])
+	 return _mesa_ffs(x[i]) + BITSET_WORDBITS * i;
+   }
+
+   return 0;
+}
+
+#define BITSET_FFS(x) __bitset_ffs(x, Elements(x))
+
+/****************************************************************************
+ * 64-bit bitset implementation
+ */
+ 
+#define BITSET64_WORD GLuint
+#define BITSET64_WORDBITS (sizeof (BITSET64_WORD) * 8)
+
+/* bitset declarations
+ */
+#define BITSET64_DECLARE(name, size) \
+   GLuint name[2]
+
+/* bitset operations
+ */
+#define BITSET64_COPY(x, y) do { (x)[0] = (y)[0]; (x)[1] = (y)[1]; } while (0)
+#define BITSET64_EQUAL(x, y) ( (x)[0] == (y)[0] && (x)[1] == (y)[1] )
+#define BITSET64_ZERO(x) do { (x)[0] = 0; (x)[1] = 0; } while (0)
+#define BITSET64_ONES(x) do { (x)[0] = 0xFF; (x)[1] = 0xFF; } while (0)
+
+#define BITSET64_BITWORD(b) ((b) / BITSET64_WORDBITS)
+#define BITSET64_BIT(b) (1 << ((b) % BITSET64_WORDBITS))
+
+/* single bit operations
+ */
+#define BITSET64_TEST(x, b) ((x)[BITSET64_BITWORD(b)] & BITSET64_BIT(b))
+#define BITSET64_SET(x, b) ((x)[BITSET64_BITWORD(b)] |= BITSET64_BIT(b))
+#define BITSET64_CLEAR(x, b) ((x)[BITSET64_BITWORD(b)] &= ~BITSET64_BIT(b))
+
+#define BITSET64_MASK(b) ((b) == BITSET64_WORDBITS ? ~0 : BITSET64_BIT(b) - 1)
+#define BITSET64_RANGE(b, e) (BITSET64_MASK((e) + 1) & ~BITSET64_MASK(b))
+
+/* bit range operations
+ */
+#define BITSET64_TEST_SUBRANGE(x, b, e) \
+   (BITSET64_BITWORD(b) == BITSET64_BITWORD(e) ? \
+   ((x)[BITSET64_BITWORD(b)] & BITSET64_RANGE(b, e)) : \
+   (assert (!"BITSET64_TEST_RANGE: bit range crosses word boundary"), 0))
+#define BITSET64_TEST_RANGE(x, b, e) \
+   (BITSET64_BITWORD(b) == BITSET64_BITWORD(e) ? \
+   (BITSET64_TEST_SUBRANGE(x, b, e)) : \
+   (BITSET64_TEST_SUBRANGE(x, b, BITSET64_WORDBITS - 1) | \
+    BITSET64_TEST_SUBRANGE(x, BITSET64_WORDBITS, e)))
+#define BITSET64_SET_SUBRANGE(x, b, e) \
+   (BITSET64_BITWORD(b) == BITSET64_BITWORD(e) ? \
+   ((x)[BITSET64_BITWORD(b)] |= BITSET64_RANGE(b, e)) : \
+   (assert (!"BITSET64_SET_RANGE: bit range crosses word boundary"), 0))
+#define BITSET64_SET_RANGE(x, b, e) \
+   (BITSET64_BITWORD(b) == BITSET64_BITWORD(e) ? \
+   (BITSET64_SET_SUBRANGE(x, b, e)) : \
+   (BITSET64_SET_SUBRANGE(x, b, BITSET64_WORDBITS - 1) | \
+    BITSET64_SET_SUBRANGE(x, BITSET64_WORDBITS, e)))
+#define BITSET64_CLEAR_SUBRANGE(x, b, e) \
+   (BITSET64_BITWORD(b) == BITSET64_BITWORD(e) ? \
+   ((x)[BITSET64_BITWORD(b)] &= ~BITSET64_RANGE(b, e)) : \
+   (assert (!"BITSET64_CLEAR_RANGE: bit range crosses word boundary"), 0))
+#define BITSET64_CLEAR_RANGE(x, b, e) \
+   (BITSET64_BITWORD(b) == BITSET64_BITWORD(e) ? \
+   (BITSET64_CLEAR_SUBRANGE(x, b, e)) : \
+   (BITSET64_CLEAR_SUBRANGE(x, b, BITSET64_WORDBITS - 1) | \
+    BITSET64_CLEAR_SUBRANGE(x, BITSET64_WORDBITS, e)))
+
+#endif