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