92 lines
1.7 KiB
C
92 lines
1.7 KiB
C
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#ifndef _S390_SWAB_H
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#define _S390_SWAB_H
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/*
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* include/asm-s390/swab.h
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*
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* S390 version
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* Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
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* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
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*/
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#include <linux/types.h>
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#ifndef __s390x__
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# define __SWAB_64_THRU_32__
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#endif
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#ifdef __s390x__
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static inline __u64 __arch_swab64p(const __u64 *x)
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{
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__u64 result;
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asm volatile("lrvg %0,%1" : "=d" (result) : "m" (*x));
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return result;
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}
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#define __arch_swab64p __arch_swab64p
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static inline __u64 __arch_swab64(__u64 x)
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{
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__u64 result;
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asm volatile("lrvgr %0,%1" : "=d" (result) : "d" (x));
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return result;
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}
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#define __arch_swab64 __arch_swab64
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static inline void __arch_swab64s(__u64 *x)
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{
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*x = __arch_swab64p(x);
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}
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#define __arch_swab64s __arch_swab64s
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#endif /* __s390x__ */
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static inline __u32 __arch_swab32p(const __u32 *x)
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{
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__u32 result;
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asm volatile(
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#ifndef __s390x__
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" icm %0,8,3(%1)\n"
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" icm %0,4,2(%1)\n"
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" icm %0,2,1(%1)\n"
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" ic %0,0(%1)"
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: "=&d" (result) : "a" (x), "m" (*x) : "cc");
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#else /* __s390x__ */
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" lrv %0,%1"
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: "=d" (result) : "m" (*x));
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#endif /* __s390x__ */
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return result;
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}
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#define __arch_swab32p __arch_swab32p
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#ifdef __s390x__
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static inline __u32 __arch_swab32(__u32 x)
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{
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__u32 result;
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asm volatile("lrvr %0,%1" : "=d" (result) : "d" (x));
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return result;
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}
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#define __arch_swab32 __arch_swab32
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#endif /* __s390x__ */
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static inline __u16 __arch_swab16p(const __u16 *x)
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{
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__u16 result;
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asm volatile(
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#ifndef __s390x__
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" icm %0,2,1(%1)\n"
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" ic %0,0(%1)\n"
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: "=&d" (result) : "a" (x), "m" (*x) : "cc");
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#else /* __s390x__ */
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" lrvh %0,%1"
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: "=d" (result) : "m" (*x));
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#endif /* __s390x__ */
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return result;
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}
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#define __arch_swab16p __arch_swab16p
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#endif /* _S390_SWAB_H */
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