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/*
* IDI,NTNU
*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://opensource.org/licenses/CDDL-1.0.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*
* Copyright (C) 2009, 2010, Jorn Amundsen <jorn.amundsen@ntnu.no>
*
* C header file to determine compile machine byte order. Take care when cross
* compiling.
*
* $Id: byteorder.h 517 2013-02-17 20:34:39Z joern $
*/
/*
* Portions copyright (c) 2013, Saso Kiselkov, All rights reserved
*/
#ifndef _CRYPTO_EDONR_BYTEORDER_H
#define _CRYPTO_EDONR_BYTEORDER_H
#include <sys/sysmacros.h>
#include <sys/param.h>
#if defined(__BYTE_ORDER)
#if (__BYTE_ORDER == __BIG_ENDIAN)
#define MACHINE_IS_BIG_ENDIAN
#elif (__BYTE_ORDER == __LITTLE_ENDIAN)
#define MACHINE_IS_LITTLE_ENDIAN
#endif
#elif defined(BYTE_ORDER)
#if (BYTE_ORDER == BIG_ENDIAN)
#define MACHINE_IS_BIG_ENDIAN
#elif (BYTE_ORDER == LITTLE_ENDIAN)
#define MACHINE_IS_LITTLE_ENDIAN
#endif
#endif /* __BYTE_ORDER || BYTE_ORDER */
#if !defined(MACHINE_IS_BIG_ENDIAN) && !defined(MACHINE_IS_LITTLE_ENDIAN)
#if defined(_ZFS_BIG_ENDIAN) || defined(_MIPSEB)
#define MACHINE_IS_BIG_ENDIAN
#endif
#if defined(_ZFS_LITTLE_ENDIAN) || defined(_MIPSEL)
#define MACHINE_IS_LITTLE_ENDIAN
#endif
#endif /* !MACHINE_IS_BIG_ENDIAN && !MACHINE_IS_LITTLE_ENDIAN */
#if !defined(MACHINE_IS_BIG_ENDIAN) && !defined(MACHINE_IS_LITTLE_ENDIAN)
#error unknown machine byte sex
#endif
#define BYTEORDER_INCLUDED
#if defined(MACHINE_IS_BIG_ENDIAN)
/*
* Byte swapping macros for big endian architectures and compilers,
* add as appropriate for other architectures and/or compilers.
*
* ld_swap64(src,dst) : uint64_t dst = *(src)
* st_swap64(src,dst) : *(dst) = uint64_t src
*/
#if defined(__PPC__) || defined(_ARCH_PPC)
#if defined(__64BIT__)
#if defined(_ARCH_PWR7)
#define aix_ld_swap64(s64, d64)\
__asm__("ldbrx %0,0,%1" : "=r"(d64) : "r"(s64))
#define aix_st_swap64(s64, d64)\
__asm__ volatile("stdbrx %1,0,%0" : : "r"(d64), "r"(s64))
#else
#define aix_ld_swap64(s64, d64) \
{ \
uint64_t *s4 = 0, h; /* initialize to zero for gcc warning */ \
\
__asm__("addi %0,%3,4;lwbrx %1,0,%3;lwbrx %2,0,%0;rldimi %1,%2,32,0"\
: "+r"(s4), "=r"(d64), "=r"(h) : "b"(s64)); \
}
#define aix_st_swap64(s64, d64) \
{ \
uint64_t *s4 = 0, h; /* initialize to zero for gcc warning */ \
h = (s64) >> 32; \
__asm__ volatile("addi %0,%3,4;stwbrx %1,0,%3;stwbrx %2,0,%0" \
: "+r"(s4) : "r"(s64), "r"(h), "b"(d64)); \
}
#endif /* 64BIT && PWR7 */
#else
#define aix_ld_swap64(s64, d64) \
{ \
uint32_t *s4 = 0, h, l; /* initialize to zero for gcc warning */\
__asm__("addi %0,%3,4;lwbrx %1,0,%3;lwbrx %2,0,%0" \
: "+r"(s4), "=r"(l), "=r"(h) : "b"(s64)); \
d64 = ((uint64_t)h<<32) | l; \
}
#define aix_st_swap64(s64, d64) \
{ \
uint32_t *s4 = 0, h, l; /* initialize to zero for gcc warning */\
l = (s64) & 0xfffffffful, h = (s64) >> 32; \
__asm__ volatile("addi %0,%3,4;stwbrx %1,0,%3;stwbrx %2,0,%0" \
: "+r"(s4) : "r"(l), "r"(h), "b"(d64)); \
}
#endif /* __64BIT__ */
#define aix_ld_swap32(s32, d32)\
__asm__("lwbrx %0,0,%1" : "=r"(d32) : "r"(s32))
#define aix_st_swap32(s32, d32)\
__asm__ volatile("stwbrx %1,0,%0" : : "r"(d32), "r"(s32))
#define ld_swap32(s, d) aix_ld_swap32(s, d)
#define st_swap32(s, d) aix_st_swap32(s, d)
#define ld_swap64(s, d) aix_ld_swap64(s, d)
#define st_swap64(s, d) aix_st_swap64(s, d)
#endif /* __PPC__ || _ARCH_PPC */
#if defined(__sparc)
#if !defined(__arch64__) && !defined(__sparcv8) && defined(__sparcv9)
#define __arch64__
#endif
#if defined(__GNUC__) || (defined(__SUNPRO_C) && __SUNPRO_C > 0x590)
/* need Sun Studio C 5.10 and above for GNU inline assembly */
#if defined(__arch64__)
#define sparc_ld_swap64(s64, d64) \
__asm__("ldxa [%1]0x88,%0" : "=r"(d64) : "r"(s64))
#define sparc_st_swap64(s64, d64) \
__asm__ volatile("stxa %0,[%1]0x88" : : "r"(s64), "r"(d64))
#define st_swap64(s, d) sparc_st_swap64(s, d)
#else
#define sparc_ld_swap64(s64, d64) \
{ \
uint32_t *s4, h, l; \
__asm__("add %3,4,%0\n\tlda [%3]0x88,%1\n\tlda [%0]0x88,%2" \
: "+r"(s4), "=r"(l), "=r"(h) : "r"(s64)); \
d64 = ((uint64_t)h<<32) | l; \
}
#define sparc_st_swap64(s64, d64) \
{ \
uint32_t *s4, h, l; \
l = (s64) & 0xfffffffful, h = (s64) >> 32; \
__asm__ volatile("add %3,4,%0\n\tsta %1,[%3]0x88\n\tsta %2,[%0]0x88"\
: "+r"(s4) : "r"(l), "r"(h), "r"(d64)); \
}
#endif /* sparc64 */
#define sparc_ld_swap32(s32, d32)\
__asm__("lda [%1]0x88,%0" : "=r"(d32) : "r"(s32))
#define sparc_st_swap32(s32, d32)\
__asm__ volatile("sta %0,[%1]0x88" : : "r"(s32), "r"(d32))
#define ld_swap32(s, d) sparc_ld_swap32(s, d)
#define st_swap32(s, d) sparc_st_swap32(s, d)
#define ld_swap64(s, d) sparc_ld_swap64(s, d)
#define st_swap64(s, d) sparc_st_swap64(s, d)
#endif /* GCC || Sun Studio C > 5.9 */
#endif /* sparc */
/* GCC fallback */
#if ((__GNUC__ >= 4) || defined(__PGIC__)) && !defined(ld_swap32)
#define ld_swap32(s, d) (d = __builtin_bswap32(*(s)))
#define st_swap32(s, d) (*(d) = __builtin_bswap32(s))
#endif /* GCC4/PGIC && !swap32 */
#if ((__GNUC__ >= 4) || defined(__PGIC__)) && !defined(ld_swap64)
#define ld_swap64(s, d) (d = __builtin_bswap64(*(s)))
#define st_swap64(s, d) (*(d) = __builtin_bswap64(s))
#endif /* GCC4/PGIC && !swap64 */
/* generic fallback */
#if !defined(ld_swap32)
#define ld_swap32(s, d) \
(d = (*(s) >> 24) | (*(s) >> 8 & 0xff00) | \
(*(s) << 8 & 0xff0000) | (*(s) << 24))
#define st_swap32(s, d) \
(*(d) = ((s) >> 24) | ((s) >> 8 & 0xff00) | \
((s) << 8 & 0xff0000) | ((s) << 24))
#endif
#if !defined(ld_swap64)
#define ld_swap64(s, d) \
(d = (*(s) >> 56) | (*(s) >> 40 & 0xff00) | \
(*(s) >> 24 & 0xff0000) | (*(s) >> 8 & 0xff000000) | \
(*(s) & 0xff000000) << 8 | (*(s) & 0xff0000) << 24 | \
(*(s) & 0xff00) << 40 | *(s) << 56)
#define st_swap64(s, d) \
(*(d) = ((s) >> 56) | ((s) >> 40 & 0xff00) | \
((s) >> 24 & 0xff0000) | ((s) >> 8 & 0xff000000) | \
((s) & 0xff000000) << 8 | ((s) & 0xff0000) << 24 | \
((s) & 0xff00) << 40 | (s) << 56)
#endif
#endif /* MACHINE_IS_BIG_ENDIAN */
#if defined(MACHINE_IS_LITTLE_ENDIAN)
/* replace swaps with simple assignments on little endian systems */
#undef ld_swap32
#undef st_swap32
#define ld_swap32(s, d) (d = *(s))
#define st_swap32(s, d) (*(d) = s)
#undef ld_swap64
#undef st_swap64
#define ld_swap64(s, d) (d = *(s))
#define st_swap64(s, d) (*(d) = s)
#endif /* MACHINE_IS_LITTLE_ENDIAN */
#endif /* _CRYPTO_EDONR_BYTEORDER_H */
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