From 51533b615e605d86154ec1b4e585c8ca1b0b15b7 Mon Sep 17 00:00:00 2001 From: Mikael Starvik Date: Wed, 27 Jul 2005 11:44:44 -0700 Subject: [PATCH] CRIS update: new subarchitecture v32 New CRIS sub architecture named v32. From: Dave Jones Fix swapped kmalloc args Signed-off-by: Mikael Starvik Signed-off-by: Dave Jones Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-cris/arch-v32/bitops.h | 64 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 include/asm-cris/arch-v32/bitops.h (limited to 'include/asm-cris/arch-v32/bitops.h') diff --git a/include/asm-cris/arch-v32/bitops.h b/include/asm-cris/arch-v32/bitops.h new file mode 100644 index 00000000000..e40a58d3b86 --- /dev/null +++ b/include/asm-cris/arch-v32/bitops.h @@ -0,0 +1,64 @@ +#ifndef _ASM_CRIS_ARCH_BITOPS_H +#define _ASM_CRIS_ARCH_BITOPS_H + +/* + * Helper functions for the core of the ff[sz] functions. They compute the + * number of leading zeroes of a bits-in-byte, byte-in-word and + * word-in-dword-swapped number. They differ in that the first function also + * inverts all bits in the input. + */ + +extern inline unsigned long +cris_swapnwbrlz(unsigned long w) +{ + unsigned long res; + + __asm__ __volatile__ ("swapnwbr %0\n\t" + "lz %0,%0" + : "=r" (res) : "0" (w)); + + return res; +} + +extern inline unsigned long +cris_swapwbrlz(unsigned long w) +{ + unsigned long res; + + __asm__ __volatile__ ("swapwbr %0\n\t" + "lz %0,%0" + : "=r" (res) : "0" (w)); + + return res; +} + +/* + * Find First Zero in word. Undefined if no zero exist, so the caller should + * check against ~0 first. + */ +extern inline unsigned long +ffz(unsigned long w) +{ + return cris_swapnwbrlz(w); +} + +/* + * Find First Set bit in word. Undefined if no 1 exist, so the caller + * should check against 0 first. + */ +extern inline unsigned long +__ffs(unsigned long w) +{ + return cris_swapnwbrlz(~w); +} + +/* + * Find First Bit that is set. + */ +extern inline unsigned long +kernel_ffs(unsigned long w) +{ + return w ? cris_swapwbrlz (w) + 1 : 0; +} + +#endif /* _ASM_CRIS_ARCH_BITOPS_H */ -- cgit