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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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a53c8fab3f
Remove the file name from the comment at top of many files. In most cases the file name was wrong anyway, so it's rather pointless. Also unify the IBM copyright statement. We did have a lot of sightly different statements and wanted to change them one after another whenever a file gets touched. However that never happened. Instead people start to take the old/"wrong" statements to use as a template for new files. So unify all of them in one go. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
89 lines
1.7 KiB
C
89 lines
1.7 KiB
C
#ifndef _S390_SWAB_H
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#define _S390_SWAB_H
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/*
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* S390 version
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* Copyright IBM Corp. 1999
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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,%O1+3(%R1)\n"
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" icm %0,4,%O1+2(%R1)\n"
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" icm %0,2,%O1+1(%R1)\n"
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" ic %0,%1"
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: "=&d" (result) : "Q" (*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,%O1+1(%R1)\n"
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" ic %0,%1\n"
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: "=&d" (result) : "Q" (*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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