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Commit bbad8123 authored by Ralf Baechle's avatar Ralf Baechle
Browse files

[MIPS] MIPS64 R2 optimizations for 64-bit endianess swapping. 


    
Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent e87dddeb

include/asm-mips/byteorder.h

+18 −0
Original line number Diff line number Diff line
@@ -39,6 +39,24 @@ static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 x) 
}

#define __arch__swab32(x)	___arch__swab32(x)



#ifdef CONFIG_CPU_MIPS64_R2



static __inline__ __attribute_const__ __u64 ___arch__swab64(__u64 x)

{

	__asm__(

	"	dsbh	%0, %1			\n"

	"	dshd	%0, %0			\n"

	"	drotr	%0, %0, 32		\n"

	: "=r" (x)

	: "r" (x));



	return x;

}



#define __arch__swab64(x)	___arch__swab64(x)



#endif /* CONFIG_CPU_MIPS64_R2 */



#endif /* CONFIG_CPU_MIPSR2 */



#if !defined(__STRICT_ANSI__) || defined(__KERNEL__)