X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Fasm-arm26%2Fbitops.h;fp=include%2Fasm-arm26%2Fbitops.h;h=d87f8634e62525d1a67bf33014f5a299ab340eb5;hb=64ba3f394c830ec48a1c31b53dcae312c56f1604;hp=19a69573a6549955b94e3f02a3488da5bd336c20;hpb=be1e6109ac94a859551f8e1774eb9a8469fe055c;p=linux-2.6.git

diff --git a/include/asm-arm26/bitops.h b/include/asm-arm26/bitops.h
index 19a69573a..d87f8634e 100644
--- a/include/asm-arm26/bitops.h
+++ b/include/asm-arm26/bitops.h
@@ -117,7 +117,65 @@ ____atomic_test_and_change_bit(unsigned int bit, volatile unsigned long *p)
 	return res & mask;
 }
 
-#include <asm-generic/bitops/non-atomic.h>
+/*
+ * Now the non-atomic variants.  We let the compiler handle all
+ * optimisations for these.  These are all _native_ endian.
+ */
+static inline void __set_bit(int nr, volatile unsigned long *p)
+{
+	p[nr >> 5] |= (1UL << (nr & 31));
+}
+
+static inline void __clear_bit(int nr, volatile unsigned long *p)
+{
+	p[nr >> 5] &= ~(1UL << (nr & 31));
+}
+
+static inline void __change_bit(int nr, volatile unsigned long *p)
+{
+	p[nr >> 5] ^= (1UL << (nr & 31));
+}
+
+static inline int __test_and_set_bit(int nr, volatile unsigned long *p)
+{
+	unsigned long oldval, mask = 1UL << (nr & 31);
+
+	p += nr >> 5;
+
+	oldval = *p;
+	*p = oldval | mask;
+	return oldval & mask;
+}
+
+static inline int __test_and_clear_bit(int nr, volatile unsigned long *p)
+{
+	unsigned long oldval, mask = 1UL << (nr & 31);
+
+	p += nr >> 5;
+
+	oldval = *p;
+	*p = oldval & ~mask;
+	return oldval & mask;
+}
+
+static inline int __test_and_change_bit(int nr, volatile unsigned long *p)
+{
+	unsigned long oldval, mask = 1UL << (nr & 31);
+
+	p += nr >> 5;
+
+	oldval = *p;
+	*p = oldval ^ mask;
+	return oldval & mask;
+}
+
+/*
+ * This routine doesn't need to be atomic.
+ */
+static inline int __test_bit(int nr, const volatile unsigned long * p)
+{
+	return (p[nr >> 5] >> (nr & 31)) & 1UL;
+}
 
 /*
  * Little endian assembly bitops.  nr = 0 -> byte 0 bit 0.
@@ -153,6 +211,7 @@ extern int _find_next_bit_le(const unsigned long *p, int size, int offset);
 #define test_and_set_bit(nr,p)		ATOMIC_BITOP_LE(test_and_set_bit,nr,p)
 #define test_and_clear_bit(nr,p)	ATOMIC_BITOP_LE(test_and_clear_bit,nr,p)
 #define test_and_change_bit(nr,p)	ATOMIC_BITOP_LE(test_and_change_bit,nr,p)
+#define test_bit(nr,p)			__test_bit(nr,p)
 #define find_first_zero_bit(p,sz)	_find_first_zero_bit_le(p,sz)
 #define find_next_zero_bit(p,sz,off)	_find_next_zero_bit_le(p,sz,off)
 #define find_first_bit(p,sz)		_find_first_bit_le(p,sz)
@@ -160,13 +219,80 @@ extern int _find_next_bit_le(const unsigned long *p, int size, int offset);
 
 #define WORD_BITOFF_TO_LE(x)		((x))
 
-#include <asm-generic/bitops/ffz.h>
-#include <asm-generic/bitops/__ffs.h>
-#include <asm-generic/bitops/fls.h>
-#include <asm-generic/bitops/fls64.h>
-#include <asm-generic/bitops/ffs.h>
-#include <asm-generic/bitops/sched.h>
-#include <asm-generic/bitops/hweight.h>
+/*
+ * ffz = Find First Zero in word. Undefined if no zero exists,
+ * so code should check against ~0UL first..
+ */
+static inline unsigned long ffz(unsigned long word)
+{
+	int k;
+
+	word = ~word;
+	k = 31;
+	if (word & 0x0000ffff) { k -= 16; word <<= 16; }
+	if (word & 0x00ff0000) { k -= 8;  word <<= 8;  }
+	if (word & 0x0f000000) { k -= 4;  word <<= 4;  }
+	if (word & 0x30000000) { k -= 2;  word <<= 2;  }
+	if (word & 0x40000000) { k -= 1; }
+        return k;
+}
+
+/*
+ * ffz = Find First Zero in word. Undefined if no zero exists,
+ * so code should check against ~0UL first..
+ */
+static inline unsigned long __ffs(unsigned long word)
+{
+	int k;
+
+	k = 31;
+	if (word & 0x0000ffff) { k -= 16; word <<= 16; }
+	if (word & 0x00ff0000) { k -= 8;  word <<= 8;  }
+	if (word & 0x0f000000) { k -= 4;  word <<= 4;  }
+	if (word & 0x30000000) { k -= 2;  word <<= 2;  }
+	if (word & 0x40000000) { k -= 1; }
+        return k;
+}
+
+/*
+ * fls: find last bit set.
+ */
+
+#define fls(x) generic_fls(x)
+#define fls64(x)   generic_fls64(x)
+
+/*
+ * ffs: find first bit set. This is defined the same way as
+ * the libc and compiler builtin ffs routines, therefore
+ * differs in spirit from the above ffz (man ffs).
+ */
+
+#define ffs(x) generic_ffs(x)
+
+/*
+ * Find first bit set in a 168-bit bitmap, where the first
+ * 128 bits are unlikely to be set.
+ */
+static inline int sched_find_first_bit(unsigned long *b)
+{
+	unsigned long v;
+	unsigned int off;
+
+	for (off = 0; v = b[off], off < 4; off++) {
+		if (unlikely(v))
+			break;
+	}
+	return __ffs(v) + off * 32;
+}
+
+/*
+ * hweightN: returns the hamming weight (i.e. the number
+ * of bits set) of a N-bit word
+ */
+
+#define hweight32(x) generic_hweight32(x)
+#define hweight16(x) generic_hweight16(x)
+#define hweight8(x) generic_hweight8(x)
 
 /*
  * Ext2 is defined to use little-endian byte ordering.
@@ -181,7 +307,7 @@ extern int _find_next_bit_le(const unsigned long *p, int size, int offset);
 #define ext2_clear_bit_atomic(lock,nr,p)        \
                 test_and_clear_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
 #define ext2_test_bit(nr,p)			\
-		test_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
+		__test_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
 #define ext2_find_first_zero_bit(p,sz)		\
 		_find_first_zero_bit_le(p,sz)
 #define ext2_find_next_zero_bit(p,sz,off)	\
@@ -194,7 +320,7 @@ extern int _find_next_bit_le(const unsigned long *p, int size, int offset);
 #define minix_set_bit(nr,p)			\
 		__set_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
 #define minix_test_bit(nr,p)			\
-		test_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
+		__test_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
 #define minix_test_and_set_bit(nr,p)		\
 		__test_and_set_bit(WORD_BITOFF_TO_LE(nr), (unsigned long *)(p))
 #define minix_test_and_clear_bit(nr,p)		\