On Fri, 21 Jan 2005 at 15:41:06 -0600 Matt Mackall wrote:
> Add rol32 and ror32 bitops to bitops.h
Can you test this patch on top of yours? I did it on 2.6.10-ac10 but it
should apply OK. Compile tested and booted, but only random.c is using it
in my kernel.
x86-64 could use this too...
Add i386 bitops for rol32/ror32:
Signed-off-by: Chuck Ebbert <[EMAIL PROTECTED]>
--- 2.6.10-ac10/include/linux/bitops.h~orig 2005-01-22 11:31:20.130239000
-0500
+++ 2.6.10-ac10/include/linux/bitops.h 2005-01-22 11:34:55.740239000 -0500
@@ -129,6 +129,7 @@
return sizeof(w) == 4 ? generic_hweight32(w) : generic_hweight64(w);
}
+#ifndef __HAVE_ARCH_ROTATE_32
/*
* rol32 - rotate a 32-bit value left
*
@@ -150,5 +151,6 @@
{
return (word >> shift) | (word << (32 - shift));
}
+#endif /* ndef __HAVE_ARCH_ROTATE_32 */
#endif
--- 2.6.10-ac10/include/asm-i386/bitops.h~orig 2004-08-24 05:08:39.000000000
-0400
+++ 2.6.10-ac10/include/asm-i386/bitops.h 2005-01-22 11:42:12.010239000
-0500
@@ -431,6 +431,41 @@
#define hweight16(x) generic_hweight16(x)
#define hweight8(x) generic_hweight8(x)
+#define __HAVE_ARCH_ROTATE_32
+/*
+ * rol32 - rotate a 32-bit value left
+ *
+ * @word: value to rotate
+ * @shift: bits to roll
+ */
+static inline __u32 rol32(__u32 word, int shift)
+{
+ __u32 res;
+
+ asm("roll %%cl,%0"
+ : "=r" (res)
+ : "0" (word), "c" (shift)
+ : "cc");
+ return res;
+}
+
+/*
+ * ror32 - rotate a 32-bit value right
+ *
+ * @word: value to rotate
+ * @shift: bits to roll
+ */
+static inline __u32 ror32(__u32 word, int shift)
+{
+ __u32 res;
+
+ asm("rorl %%cl,%0"
+ : "=r" (res)
+ : "0" (word), "c" (shift)
+ : "cc");
+ return res;
+}
+
#endif /* __KERNEL__ */
#ifdef __KERNEL__
Chuck
-
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