Hi Febio, You replaced __always_inline to inline any specific reason? found __always_inline at some parts of header in code. But my compilation is not-smooth with this.
On 24 October 2015 at 20:56, Fabio Estevam <feste...@gmail.com> wrote: > From: Fabio Estevam <fabio.este...@freescale.com> > > Use the generic bitops header files from the kernel. > > Imported from kernel 4.2.3. > > Signed-off-by: Fabio Estevam <fabio.este...@freescale.com> > Reviewed-by: Tom Rini <tr...@konsulko.com> > --- > Changes since v1: > - None > > include/asm-generic/bitops/__ffs.h | 43 > ++++++++++++++++++++++++++++++++++++++ > include/asm-generic/bitops/__fls.h | 43 > ++++++++++++++++++++++++++++++++++++++ > include/asm-generic/bitops/fls.h | 41 ++++++++++++++++++++++++++++++++++++ > include/asm-generic/bitops/fls64.h | 36 +++++++++++++++++++++++++++++++ > include/linux/bitops.h | 26 +++++++++++++++++++++++ > 5 files changed, 189 insertions(+) > create mode 100644 include/asm-generic/bitops/__ffs.h > create mode 100644 include/asm-generic/bitops/__fls.h > create mode 100644 include/asm-generic/bitops/fls.h > create mode 100644 include/asm-generic/bitops/fls64.h > > diff --git a/include/asm-generic/bitops/__ffs.h > b/include/asm-generic/bitops/__ffs.h > new file mode 100644 > index 0000000..9a3274a > --- /dev/null > +++ b/include/asm-generic/bitops/__ffs.h > @@ -0,0 +1,43 @@ > +#ifndef _ASM_GENERIC_BITOPS___FFS_H_ > +#define _ASM_GENERIC_BITOPS___FFS_H_ > + > +#include <asm/types.h> > + > +/** > + * __ffs - find first bit in word. > + * @word: The word to search > + * > + * Undefined if no bit exists, so code should check against 0 first. > + */ > +static inline unsigned long __ffs(unsigned long word) > +{ > + int num = 0; > + > +#if BITS_PER_LONG == 64 > + if ((word & 0xffffffff) == 0) { > + num += 32; > + word >>= 32; > + } > +#endif > + if ((word & 0xffff) == 0) { > + num += 16; > + word >>= 16; > + } > + if ((word & 0xff) == 0) { > + num += 8; > + word >>= 8; > + } > + if ((word & 0xf) == 0) { > + num += 4; > + word >>= 4; > + } > + if ((word & 0x3) == 0) { > + num += 2; > + word >>= 2; > + } > + if ((word & 0x1) == 0) > + num += 1; > + return num; > +} > + > +#endif /* _ASM_GENERIC_BITOPS___FFS_H_ */ > diff --git a/include/asm-generic/bitops/__fls.h > b/include/asm-generic/bitops/__fls.h > new file mode 100644 > index 0000000..be24465 > --- /dev/null > +++ b/include/asm-generic/bitops/__fls.h > @@ -0,0 +1,43 @@ > +#ifndef _ASM_GENERIC_BITOPS___FLS_H_ > +#define _ASM_GENERIC_BITOPS___FLS_H_ > + > +#include <asm/types.h> > + > +/** > + * __fls - find last (most-significant) set bit in a long word > + * @word: the word to search > + * > + * Undefined if no set bit exists, so code should check against 0 first. > + */ > +static inline unsigned long __fls(unsigned long word) > +{ > + int num = BITS_PER_LONG - 1; > + > +#if BITS_PER_LONG == 64 > + if (!(word & (~0ul << 32))) { > + num -= 32; > + word <<= 32; > + } > +#endif > + if (!(word & (~0ul << (BITS_PER_LONG-16)))) { > + num -= 16; > + word <<= 16; > + } > + if (!(word & (~0ul << (BITS_PER_LONG-8)))) { > + num -= 8; > + word <<= 8; > + } > + if (!(word & (~0ul << (BITS_PER_LONG-4)))) { > + num -= 4; > + word <<= 4; > + } > + if (!(word & (~0ul << (BITS_PER_LONG-2)))) { > + num -= 2; > + word <<= 2; > + } > + if (!(word & (~0ul << (BITS_PER_LONG-1)))) > + num -= 1; > + return num; > +} > + > +#endif /* _ASM_GENERIC_BITOPS___FLS_H_ */ > diff --git a/include/asm-generic/bitops/fls.h > b/include/asm-generic/bitops/fls.h > new file mode 100644 > index 0000000..850859b > --- /dev/null > +++ b/include/asm-generic/bitops/fls.h > @@ -0,0 +1,41 @@ > +#ifndef _ASM_GENERIC_BITOPS_FLS_H_ > +#define _ASM_GENERIC_BITOPS_FLS_H_ > + > +/** > + * fls - find last (most-significant) bit set > + * @x: the word to search > + * > + * This is defined the same way as ffs. > + * Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32. > + */ > + > +static inline int fls(int x) > +{ > + int r = 32; > + > + if (!x) > + return 0; > + if (!(x & 0xffff0000u)) { > + x <<= 16; > + r -= 16; > + } > + if (!(x & 0xff000000u)) { > + x <<= 8; > + r -= 8; > + } > + if (!(x & 0xf0000000u)) { > + x <<= 4; > + r -= 4; > + } > + if (!(x & 0xc0000000u)) { > + x <<= 2; > + r -= 2; > + } > + if (!(x & 0x80000000u)) { > + x <<= 1; > + r -= 1; > + } > + return r; > +} > + > +#endif /* _ASM_GENERIC_BITOPS_FLS_H_ */ > diff --git a/include/asm-generic/bitops/fls64.h > b/include/asm-generic/bitops/fls64.h > new file mode 100644 > index 0000000..86d403f > --- /dev/null > +++ b/include/asm-generic/bitops/fls64.h > @@ -0,0 +1,36 @@ > +#ifndef _ASM_GENERIC_BITOPS_FLS64_H_ > +#define _ASM_GENERIC_BITOPS_FLS64_H_ > + > +#include <asm/types.h> > + > +/** > + * fls64 - find last set bit in a 64-bit word > + * @x: the word to search > + * > + * This is defined in a similar way as the libc and compiler builtin > + * ffsll, but returns the position of the most significant set bit. > + * > + * fls64(value) returns 0 if value is 0 or the position of the last > + * set bit if value is nonzero. The last (most significant) bit is > + * at position 64. > + */ > +#if BITS_PER_LONG == 32 > +static inline int fls64(__u64 x) > +{ > + __u32 h = x >> 32; > + if (h) > + return fls(h) + 32; > + return fls(x); > +} > +#elif BITS_PER_LONG == 64 > +static inline int fls64(__u64 x) > +{ > + if (x == 0) > + return 0; > + return __fls(x) + 1; > +} > +#else > +#error BITS_PER_LONG not 32 or 64 > +#endif > + > +#endif /* _ASM_GENERIC_BITOPS_FLS64_H_ */ > diff --git a/include/linux/bitops.h b/include/linux/bitops.h > index 7b4011f..57143ac 100644 > --- a/include/linux/bitops.h > +++ b/include/linux/bitops.h > @@ -139,6 +139,32 @@ static inline unsigned int generic_hweight8(unsigned int > w) > # define fls generic_fls > #endif > > +static inline unsigned fls_long(unsigned long l) > +{ > + if (sizeof(l) == 4) > + return fls(l); > + return fls64(l); > +} > + > +/** > + * __ffs64 - find first set bit in a 64 bit word > + * @word: The 64 bit word > + * > + * On 64 bit arches this is a synomyn for __ffs > + * The result is not defined if no bits are set, so check that @word > + * is non-zero before calling this. > + */ > +static inline unsigned long __ffs64(u64 word) > +{ > +#if BITS_PER_LONG == 32 > + if (((u32)word) == 0UL) > + return __ffs((u32)(word >> 32)) + 32; > +#elif BITS_PER_LONG != 64 > +#error BITS_PER_LONG not 32 or 64 > +#endif > + return __ffs((unsigned long)word); > +} > + > /** > * __set_bit - Set a bit in memory > * @nr: the bit to set > -- > 1.9.1 > > _______________________________________________ > U-Boot mailing list > U-Boot@lists.denx.de > http://lists.denx.de/mailman/listinfo/u-boot -- Jagan | openedev. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot