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Diffstat (limited to '')
| -rw-r--r-- | arch/sh/include/uapi/asm/swab.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/arch/sh/include/uapi/asm/swab.h b/arch/sh/include/uapi/asm/swab.h new file mode 100644 index 000000000..c727d381a --- /dev/null +++ b/arch/sh/include/uapi/asm/swab.h @@ -0,0 +1,50 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +#ifndef __ASM_SH_SWAB_H +#define __ASM_SH_SWAB_H + +/* + * Copyright (C) 1999 Niibe Yutaka + * Copyright (C) 2000, 2001 Paolo Alberelli + */ +#include <linux/compiler.h> +#include <linux/types.h> +#include <asm-generic/swab.h> + +static inline __attribute_const__ __u32 __arch_swab32(__u32 x) +{ + __asm__( + "swap.b %1, %0\n\t" + "swap.w %0, %0\n\t" + "swap.b %0, %0" + : "=r" (x) + : "r" (x)); + + return x; +} +#define __arch_swab32 __arch_swab32 + +static inline __attribute_const__ __u16 __arch_swab16(__u16 x) +{ + __asm__( + "swap.b %1, %0" + : "=r" (x) + : "r" (x)); + + return x; +} +#define __arch_swab16 __arch_swab16 + +static inline __u64 __arch_swab64(__u64 val) +{ + union { + struct { __u32 a,b; } s; + __u64 u; + } v, w; + v.u = val; + w.s.b = __arch_swab32(v.s.a); + w.s.a = __arch_swab32(v.s.b); + return w.u; +} +#define __arch_swab64 __arch_swab64 + +#endif /* __ASM_SH_SWAB_H */ |