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//usr/include/asm/swab.h
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ #ifndef _ASM_X86_SWAB_H #define _ASM_X86_SWAB_H #include <linux/types.h> static __inline__ __u32 __arch_swab32(__u32 val) { __asm__("bswapl %0" : "=r" (val) : "0" (val)); return val; } #define __arch_swab32 __arch_swab32 static __inline__ __u64 __arch_swab64(__u64 val) { #ifdef __i386__ union { struct { __u32 a; __u32 b; } s; __u64 u; } v; v.u = val; __asm__("bswapl %0 ; bswapl %1 ; xchgl %0,%1" : "=r" (v.s.a), "=r" (v.s.b) : "0" (v.s.a), "1" (v.s.b)); return v.u; #else /* __i386__ */ __asm__("bswapq %0" : "=r" (val) : "0" (val)); return val; #endif } #define __arch_swab64 __arch_swab64 #endif /* _ASM_X86_SWAB_H */
