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72 lines
1.3 KiB
C
72 lines
1.3 KiB
C
#ifndef __ASM_SH_BYTEORDER_H
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#define __ASM_SH_BYTEORDER_H
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/*
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* Copyright (C) 1999 Niibe Yutaka
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* Copyright (C) 2000, 2001 Paolo Alberelli
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*/
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#include <linux/compiler.h>
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#include <linux/types.h>
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static inline __attribute_const__ __u32 ___arch__swab32(__u32 x)
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{
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__asm__(
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#ifdef CONFIG_SUPERH32
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"swap.b %0, %0\n\t"
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"swap.w %0, %0\n\t"
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"swap.b %0, %0"
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#else
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"byterev %0, %0\n\t"
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"shari %0, 32, %0"
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#endif
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: "=r" (x)
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: "0" (x));
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return x;
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}
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static inline __attribute_const__ __u16 ___arch__swab16(__u16 x)
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{
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__asm__(
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#ifdef CONFIG_SUPERH32
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"swap.b %0, %0"
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#else
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"byterev %0, %0\n\t"
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"shari %0, 32, %0"
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#endif
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: "=r" (x)
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: "0" (x));
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return x;
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}
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static inline __u64 ___arch__swab64(__u64 val)
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{
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union {
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struct { __u32 a,b; } s;
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__u64 u;
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} v, w;
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v.u = val;
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w.s.b = ___arch__swab32(v.s.a);
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w.s.a = ___arch__swab32(v.s.b);
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return w.u;
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}
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#define __arch__swab64(x) ___arch__swab64(x)
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#define __arch__swab32(x) ___arch__swab32(x)
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#define __arch__swab16(x) ___arch__swab16(x)
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#if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
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# define __BYTEORDER_HAS_U64__
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# define __SWAB_64_THRU_32__
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#endif
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#ifdef __LITTLE_ENDIAN__
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#include <linux/byteorder/little_endian.h>
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#else
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#include <linux/byteorder/big_endian.h>
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#endif
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#endif /* __ASM_SH_BYTEORDER_H */
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