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94c12cc7d1
Major cleanup of all s390 inline assemblies. They now have a common coding style. Quite a few have been shortened, mainly by using register asm variables. Use of the EX_TABLE macro helps as well. The atomic ops, bit ops and locking inlines new use the Q-constraint if a newer gcc is used. That results in slightly better code. Thanks to Christian Borntraeger for proof reading the changes. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
125 lines
2.5 KiB
C
125 lines
2.5 KiB
C
#ifndef _S390_BYTEORDER_H
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#define _S390_BYTEORDER_H
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/*
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* include/asm-s390/byteorder.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 <asm/types.h>
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#ifdef __GNUC__
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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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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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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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#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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static inline __u32 ___arch__swab32(__u32 x)
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{
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#ifndef __s390x__
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return ___arch__swab32p(&x);
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#else /* __s390x__ */
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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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#endif /* __s390x__ */
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}
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static __inline__ void ___arch__swab32s(__u32 *x)
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{
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*x = ___arch__swab32p(x);
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}
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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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static __inline__ __u16 ___arch__swab16(__u16 x)
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{
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return ___arch__swab16p(&x);
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}
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static __inline__ void ___arch__swab16s(__u16 *x)
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{
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*x = ___arch__swab16p(x);
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}
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#ifdef __s390x__
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#define __arch__swab64(x) ___arch__swab64(x)
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#define __arch__swab64p(x) ___arch__swab64p(x)
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#define __arch__swab64s(x) ___arch__swab64s(x)
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#endif /* __s390x__ */
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#define __arch__swab32(x) ___arch__swab32(x)
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#define __arch__swab16(x) ___arch__swab16(x)
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#define __arch__swab32p(x) ___arch__swab32p(x)
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#define __arch__swab16p(x) ___arch__swab16p(x)
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#define __arch__swab32s(x) ___arch__swab32s(x)
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#define __arch__swab16s(x) ___arch__swab16s(x)
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#ifndef __s390x__
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#if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
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# define __BYTEORDER_HAS_U64__
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# define __SWAB_64_THRU_32__
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#endif
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#else /* __s390x__ */
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#define __BYTEORDER_HAS_U64__
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#endif /* __s390x__ */
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#endif /* __GNUC__ */
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#include <linux/byteorder/big_endian.h>
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#endif /* _S390_BYTEORDER_H */
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