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71 lines
1.5 KiB
71 lines
1.5 KiB
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
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/* |
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* This file is subject to the terms and conditions of the GNU General Public |
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* License. See the file "COPYING" in the main directory of this archive |
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* for more details. |
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* |
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* Copyright (C) 1996, 99, 2003 by Ralf Baechle |
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*/ |
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#ifndef _ASM_SWAB_H |
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#define _ASM_SWAB_H |
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#include <linux/compiler.h> |
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#include <linux/types.h> |
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#define __SWAB_64_THRU_32__ |
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#if !defined(__mips16) && \ |
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((defined(__mips_isa_rev) && (__mips_isa_rev >= 2)) || \ |
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defined(_MIPS_ARCH_LOONGSON3A)) |
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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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" .set push \n" |
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" .set arch=mips32r2 \n" |
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" wsbh %0, %1 \n" |
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" .set pop \n" |
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: "=r" (x) |
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: "r" (x)); |
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return x; |
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} |
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#define __arch_swab16 __arch_swab16 |
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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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" .set push \n" |
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" .set arch=mips32r2 \n" |
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" wsbh %0, %1 \n" |
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" rotr %0, %0, 16 \n" |
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" .set pop \n" |
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: "=r" (x) |
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: "r" (x)); |
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return x; |
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} |
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#define __arch_swab32 __arch_swab32 |
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/* |
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* Having already checked for MIPS R2, enable the optimized version for |
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* 64-bit kernel on r2 CPUs. |
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*/ |
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#ifdef __mips64 |
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static inline __attribute_const__ __u64 __arch_swab64(__u64 x) |
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{ |
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__asm__( |
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" .set push \n" |
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" .set arch=mips64r2 \n" |
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" dsbh %0, %1 \n" |
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" dshd %0, %0 \n" |
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" .set pop \n" |
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: "=r" (x) |
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: "r" (x)); |
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return x; |
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} |
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#define __arch_swab64 __arch_swab64 |
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#endif /* __mips64 */ |
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#endif /* (not __mips16) and (MIPS R2 or newer or Loongson 3A) */ |
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#endif /* _ASM_SWAB_H */
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