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