71 lines
1.4 KiB
C
71 lines
1.4 KiB
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 1996, 99, 2003 by Ralf Baechle
|
|
*/
|
|
#ifndef _ASM_SWAB_H
|
|
#define _ASM_SWAB_H
|
|
|
|
#include <linux/compiler.h>
|
|
#include <linux/types.h>
|
|
|
|
#define __SWAB_64_THRU_32__
|
|
|
|
#if !defined(__mips16) && \
|
|
((defined(__mips_isa_rev) && (__mips_isa_rev >= 2)) || \
|
|
defined(_MIPS_ARCH_LOONGSON3A))
|
|
|
|
static inline __attribute_const__ __u16 __arch_swab16(__u16 x)
|
|
{
|
|
__asm__(
|
|
" .set push \n"
|
|
" .set arch=mips32r2 \n"
|
|
" wsbh %0, %1 \n"
|
|
" .set pop \n"
|
|
: "=r" (x)
|
|
: "r" (x));
|
|
|
|
return x;
|
|
}
|
|
#define __arch_swab16 __arch_swab16
|
|
|
|
static inline __attribute_const__ __u32 __arch_swab32(__u32 x)
|
|
{
|
|
__asm__(
|
|
" .set push \n"
|
|
" .set arch=mips32r2 \n"
|
|
" wsbh %0, %1 \n"
|
|
" rotr %0, %0, 16 \n"
|
|
" .set pop \n"
|
|
: "=r" (x)
|
|
: "r" (x));
|
|
|
|
return x;
|
|
}
|
|
#define __arch_swab32 __arch_swab32
|
|
|
|
/*
|
|
* Having already checked for MIPS R2, enable the optimized version for
|
|
* 64-bit kernel on r2 CPUs.
|
|
*/
|
|
#ifdef __mips64
|
|
static inline __attribute_const__ __u64 __arch_swab64(__u64 x)
|
|
{
|
|
__asm__(
|
|
" .set push \n"
|
|
" .set arch=mips64r2 \n"
|
|
" dsbh %0, %1 \n"
|
|
" dshd %0, %0 \n"
|
|
" .set pop \n"
|
|
: "=r" (x)
|
|
: "r" (x));
|
|
|
|
return x;
|
|
}
|
|
#define __arch_swab64 __arch_swab64
|
|
#endif /* __mips64 */
|
|
#endif /* (not __mips16) and (MIPS R2 or newer or Loongson 3A) */
|
|
#endif /* _ASM_SWAB_H */
|