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98fd433aa6
These are not the most efficient versions of swab but the wrapper does not do much byte swapping. On a big endian cpu, these routines are a no-op. Signed-off-by: Cédric Le Goater <clg@fr.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
30 lines
816 B
C
30 lines
816 B
C
#ifndef _PPC_BOOT_SWAB_H_
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#define _PPC_BOOT_SWAB_H_
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static inline u16 swab16(u16 x)
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{
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return ((x & (u16)0x00ffU) << 8) |
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((x & (u16)0xff00U) >> 8);
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}
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static inline u32 swab32(u32 x)
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{
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return ((x & (u32)0x000000ffUL) << 24) |
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((x & (u32)0x0000ff00UL) << 8) |
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((x & (u32)0x00ff0000UL) >> 8) |
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((x & (u32)0xff000000UL) >> 24);
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}
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static inline u64 swab64(u64 x)
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{
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return (u64)((x & (u64)0x00000000000000ffULL) << 56) |
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(u64)((x & (u64)0x000000000000ff00ULL) << 40) |
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(u64)((x & (u64)0x0000000000ff0000ULL) << 24) |
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(u64)((x & (u64)0x00000000ff000000ULL) << 8) |
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(u64)((x & (u64)0x000000ff00000000ULL) >> 8) |
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(u64)((x & (u64)0x0000ff0000000000ULL) >> 24) |
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(u64)((x & (u64)0x00ff000000000000ULL) >> 40) |
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(u64)((x & (u64)0xff00000000000000ULL) >> 56);
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}
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#endif /* _PPC_BOOT_SWAB_H_ */
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