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[PATCH] powerpc: merge byteorder.h

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powerpc: Merge byteorder.h

Essentially adopts the 64-bit version of this file.  The 32-bit version had
been using unsigned ints for arguments/return values that were actually
only 16 bits - the new file uses __u16 for these items as in the 64-bit
version of the header.  The order of some of the asm constraints
in the 64-bit version was slightly different than the 32-bit version,
but they produce identical code.

Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
Signed-off-by: Kumar Gala <kumar.gala@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Becky Bruce 2005-09-27 14:28:56 -05:00 committed by Paul Mackerras
parent 6b67f62cf6
commit a559c91d77
2 changed files with 7 additions and 80 deletions
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11
include/asm-ppc64/byteorder.h → include/asm-powerpc/byteorder.h
View File

@ -1,5 +1,5 @@
#ifndef _PPC64_BYTEORDER_H
#define _PPC64_BYTEORDER_H
#ifndef _ASM_POWERPC_BYTEORDER_H
#define _ASM_POWERPC_BYTEORDER_H
/*
* This program is free software; you can redistribute it and/or
@ -77,10 +77,13 @@ static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 value)
#ifndef __STRICT_ANSI__
#define __BYTEORDER_HAS_U64__
#endif
#ifndef __powerpc64__
#define __SWAB_64_THRU_32__
#endif /* __powerpc64__ */
#endif /* __STRICT_ANSI__ */
#endif /* __GNUC__ */
#include <linux/byteorder/big_endian.h>
#endif /* _PPC64_BYTEORDER_H */
#endif /* _ASM_POWERPC_BYTEORDER_H */

76
include/asm-ppc/byteorder.h
View File

@ -1,76 +0,0 @@
#ifndef _PPC_BYTEORDER_H
#define _PPC_BYTEORDER_H
#include <asm/types.h>
#include <linux/compiler.h>
#ifdef __GNUC__
#ifdef __KERNEL__
extern __inline__ unsigned ld_le16(const volatile unsigned short *addr)
{
unsigned val;
__asm__ __volatile__ ("lhbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr));
return val;
}
extern __inline__ void st_le16(volatile unsigned short *addr, const unsigned val)
{
__asm__ __volatile__ ("sthbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr));
}
extern __inline__ unsigned ld_le32(const volatile unsigned *addr)
{
unsigned val;
__asm__ __volatile__ ("lwbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr));
return val;
}
extern __inline__ void st_le32(volatile unsigned *addr, const unsigned val)
{
__asm__ __volatile__ ("stwbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr));
}
static __inline__ __attribute_const__ __u16 ___arch__swab16(__u16 value)
{
__u16 result;
__asm__("rlwimi %0,%2,8,16,23" : "=&r" (result) : "0" (value >> 8), "r" (value));
return result;
}
static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 value)
{
__u32 result;
__asm__("rlwimi %0,%2,24,16,23" : "=&r" (result) : "0" (value>>24), "r" (value));
__asm__("rlwimi %0,%2,8,8,15" : "=&r" (result) : "0" (result), "r" (value));
__asm__("rlwimi %0,%2,24,0,7" : "=&r" (result) : "0" (result), "r" (value));
return result;
}
#define __arch__swab32(x) ___arch__swab32(x)
#define __arch__swab16(x) ___arch__swab16(x)
/* The same, but returns converted value from the location pointer by addr. */
#define __arch__swab16p(addr) ld_le16(addr)
#define __arch__swab32p(addr) ld_le32(addr)
/* The same, but do the conversion in situ, ie. put the value back to addr. */
#define __arch__swab16s(addr) st_le16(addr,*addr)
#define __arch__swab32s(addr) st_le32(addr,*addr)
#endif /* __KERNEL__ */
#if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
# define __BYTEORDER_HAS_U64__
# define __SWAB_64_THRU_32__
#endif
#endif /* __GNUC__ */
#include <linux/byteorder/big_endian.h>
#endif /* _PPC_BYTEORDER_H */