zfs/module/icp/algs/edonr/edonr_byteorder.h

   1 /*
   2  * IDI,NTNU
   3  *
   4  * CDDL HEADER START
   5  *
   6  * The contents of this file are subject to the terms of the
   7  * Common Development and Distribution License (the "License").
   8  * You may not use this file except in compliance with the License.
   9  *
  10  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  11  * or http://opensource.org/licenses/CDDL-1.0.
  12  * See the License for the specific language governing permissions
  13  * and limitations under the License.
  14  *
  15  * When distributing Covered Code, include this CDDL HEADER in each
  16  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  17  * If applicable, add the following below this CDDL HEADER, with the
  18  * fields enclosed by brackets "[]" replaced with your own identifying
  19  * information: Portions Copyright [yyyy] [name of copyright owner]
  20  *
  21  * CDDL HEADER END
  22  *
  23  * Copyright (C) 2009, 2010, Jorn Amundsen <jorn.amundsen@ntnu.no>
  24  *
  25  * C header file to determine compile machine byte order. Take care when cross
  26  * compiling.
  27  *
  28  * $Id: byteorder.h 517 2013-02-17 20:34:39Z joern $
  29  */
  30 /*
  31  * Portions copyright (c) 2013, Saso Kiselkov, All rights reserved
  32  */
  33
  34 #ifndef _CRYPTO_EDONR_BYTEORDER_H
  35 #define _CRYPTO_EDONR_BYTEORDER_H
  36
  37
  38 #include <sys/param.h>
  39
  40 #if defined(__BYTE_ORDER)
  41 #if (__BYTE_ORDER == __BIG_ENDIAN)
  42 #define MACHINE_IS_BIG_ENDIAN
  43 #elif (__BYTE_ORDER == __LITTLE_ENDIAN)
  44 #define MACHINE_IS_LITTLE_ENDIAN
  45 #endif
  46 #elif defined(BYTE_ORDER)
  47 #if (BYTE_ORDER == BIG_ENDIAN)
  48 #define MACHINE_IS_BIG_ENDIAN
  49 #elif (BYTE_ORDER == LITTLE_ENDIAN)
  50 #define MACHINE_IS_LITTLE_ENDIAN
  51 #endif
  52 #endif /* __BYTE_ORDER || BYTE_ORDER */
  53
  54 #if !defined(MACHINE_IS_BIG_ENDIAN) && !defined(MACHINE_IS_LITTLE_ENDIAN)
  55 #if defined(_BIG_ENDIAN) || defined(_MIPSEB)
  56 #define MACHINE_IS_BIG_ENDIAN
  57 #endif
  58 #if defined(_LITTLE_ENDIAN) || defined(_MIPSEL)
  59 #define MACHINE_IS_LITTLE_ENDIAN
  60 #endif
  61 #endif /* !MACHINE_IS_BIG_ENDIAN && !MACHINE_IS_LITTLE_ENDIAN */
  62
  63 #if !defined(MACHINE_IS_BIG_ENDIAN) && !defined(MACHINE_IS_LITTLE_ENDIAN)
  64 #error unknown machine byte sex
  65 #endif
  66
  67 #define BYTEORDER_INCLUDED
  68
  69 #if defined(MACHINE_IS_BIG_ENDIAN)
  70 /*
  71  * Byte swapping macros for big endian architectures and compilers,
  72  * add as appropriate for other architectures and/or compilers.
  73  *
  74  *     ld_swap64(src,dst) : uint64_t dst = *(src)
  75  *     st_swap64(src,dst) : *(dst)       = uint64_t src
  76  */
  77
  78 #if defined(__PPC__) || defined(_ARCH_PPC)
  79
  80 #if defined(__64BIT__)
  81 #if defined(_ARCH_PWR7)
  82 #define aix_ld_swap64(s64, d64)\
  83         __asm__("ldbrx %0,0,%1" : "=r"(d64) : "r"(s64))
  84 #define aix_st_swap64(s64, d64)\
  85         __asm__ volatile("stdbrx %1,0,%0" : : "r"(d64), "r"(s64))
  86 #else
  87 #define aix_ld_swap64(s64, d64)                                         \
  88 {                                                                       \
  89         uint64_t *s4 = 0, h; /* initialize to zero for gcc warning */   \
  90                                                                         \
  91         __asm__("addi %0,%3,4;lwbrx %1,0,%3;lwbrx %2,0,%0;rldimi %1,%2,32,0"\
  92                 : "+r"(s4), "=r"(d64), "=r"(h) : "b"(s64));             \
  93 }
  94
  95 #define aix_st_swap64(s64, d64)                                         \
  96 {                                                                       \
  97         uint64_t *s4 = 0, h; /* initialize to zero for gcc warning */   \
  98         h = (s64) >> 32;                                                \
  99         __asm__ volatile("addi %0,%3,4;stwbrx %1,0,%3;stwbrx %2,0,%0"   \
 100                 : "+r"(s4) : "r"(s64), "r"(h), "b"(d64));               \
 101 }
 102 #endif /* 64BIT && PWR7 */
 103 #else
 104 #define aix_ld_swap64(s64, d64)                                         \
 105 {                                                                       \
 106         uint32_t *s4 = 0, h, l; /* initialize to zero for gcc warning */\
 107         __asm__("addi %0,%3,4;lwbrx %1,0,%3;lwbrx %2,0,%0"              \
 108                 : "+r"(s4), "=r"(l), "=r"(h) : "b"(s64));               \
 109         d64 = ((uint64_t)h<<32) | l;                                    \
 110 }
 111
 112 #define aix_st_swap64(s64, d64)                                         \
 113 {                                                                       \
 114         uint32_t *s4 = 0, h, l; /* initialize to zero for gcc warning */\
 115         l = (s64) & 0xfffffffful, h = (s64) >> 32;                      \
 116         __asm__ volatile("addi %0,%3,4;stwbrx %1,0,%3;stwbrx %2,0,%0"   \
 117                 : "+r"(s4) : "r"(l), "r"(h), "b"(d64));                 \
 118 }
 119 #endif /* __64BIT__ */
 120 #define aix_ld_swap32(s32, d32)\
 121         __asm__("lwbrx %0,0,%1" : "=r"(d32) : "r"(s32))
 122 #define aix_st_swap32(s32, d32)\
 123         __asm__ volatile("stwbrx %1,0,%0" : : "r"(d32), "r"(s32))
 124 #define ld_swap32(s, d) aix_ld_swap32(s, d)
 125 #define st_swap32(s, d) aix_st_swap32(s, d)
 126 #define ld_swap64(s, d) aix_ld_swap64(s, d)
 127 #define st_swap64(s, d) aix_st_swap64(s, d)
 128 #endif /* __PPC__ || _ARCH_PPC */
 129
 130 #if defined(__sparc)
 131 #if !defined(__arch64__) && !defined(__sparcv8) && defined(__sparcv9)
 132 #define __arch64__
 133 #endif
 134 #if defined(__GNUC__) || (defined(__SUNPRO_C) && __SUNPRO_C > 0x590)
 135 /* need Sun Studio C 5.10 and above for GNU inline assembly */
 136 #if defined(__arch64__)
 137 #define sparc_ld_swap64(s64, d64)                                       \
 138         __asm__("ldxa [%1]0x88,%0" : "=r"(d64) : "r"(s64))
 139 #define sparc_st_swap64(s64, d64)                                       \
 140         __asm__ volatile("stxa %0,[%1]0x88" : : "r"(s64), "r"(d64))
 141 #define st_swap64(s, d) sparc_st_swap64(s, d)
 142 #else
 143 #define sparc_ld_swap64(s64, d64)                                       \
 144 {                                                                       \
 145         uint32_t *s4, h, l;                                             \
 146         __asm__("add %3,4,%0\n\tlda [%3]0x88,%1\n\tlda [%0]0x88,%2"     \
 147                 : "+r"(s4), "=r"(l), "=r"(h) : "r"(s64));               \
 148         d64 = ((uint64_t)h<<32) | l;                                    \
 149 }
 150 #define sparc_st_swap64(s64, d64)                                       \
 151 {                                                                       \
 152         uint32_t *s4, h, l;                                             \
 153         l = (s64) & 0xfffffffful, h = (s64) >> 32;                      \
 154         __asm__ volatile("add %3,4,%0\n\tsta %1,[%3]0x88\n\tsta %2,[%0]0x88"\
 155                 : "+r"(s4) : "r"(l), "r"(h), "r"(d64));                 \
 156 }
 157 #endif /* sparc64 */
 158 #define sparc_ld_swap32(s32, d32)\
 159         __asm__("lda [%1]0x88,%0" : "=r"(d32) : "r"(s32))
 160 #define sparc_st_swap32(s32, d32)\
 161         __asm__ volatile("sta %0,[%1]0x88" : : "r"(s32), "r"(d32))
 162 #define ld_swap32(s, d) sparc_ld_swap32(s, d)
 163 #define st_swap32(s, d) sparc_st_swap32(s, d)
 164 #define ld_swap64(s, d) sparc_ld_swap64(s, d)
 165 #define st_swap64(s, d) sparc_st_swap64(s, d)
 166 #endif /* GCC || Sun Studio C > 5.9 */
 167 #endif /* sparc */
 168
 169 /* GCC fallback */
 170 #if ((__GNUC__ >= 4) || defined(__PGIC__)) && !defined(ld_swap32)
 171 #define ld_swap32(s, d) (d = __builtin_bswap32(*(s)))
 172 #define st_swap32(s, d) (*(d) = __builtin_bswap32(s))
 173 #endif /* GCC4/PGIC && !swap32 */
 174 #if ((__GNUC__ >= 4) || defined(__PGIC__)) && !defined(ld_swap64)
 175 #define ld_swap64(s, d) (d = __builtin_bswap64(*(s)))
 176 #define st_swap64(s, d) (*(d) = __builtin_bswap64(s))
 177 #endif /* GCC4/PGIC && !swap64 */
 178
 179 /* generic fallback */
 180 #if !defined(ld_swap32)
 181 #define ld_swap32(s, d)                                                 \
 182         (d = (*(s) >> 24) | (*(s) >> 8 & 0xff00) |                      \
 183         (*(s) << 8 & 0xff0000) | (*(s) << 24))
 184 #define st_swap32(s, d)                                                 \
 185         (*(d) = ((s) >> 24) | ((s) >> 8 & 0xff00) |                     \
 186         ((s) << 8 & 0xff0000) | ((s) << 24))
 187 #endif
 188 #if !defined(ld_swap64)
 189 #define ld_swap64(s, d)                                                 \
 190         (d = (*(s) >> 56) | (*(s) >> 40 & 0xff00) |                     \
 191         (*(s) >> 24 & 0xff0000) | (*(s) >> 8 & 0xff000000) |            \
 192         (*(s) & 0xff000000) << 8 | (*(s) & 0xff0000) << 24 |            \
 193         (*(s) & 0xff00) << 40 | *(s) << 56)
 194 #define st_swap64(s, d)                                                 \
 195         (*(d) = ((s) >> 56) | ((s) >> 40 & 0xff00) |                    \
 196         ((s) >> 24 & 0xff0000) | ((s) >> 8 & 0xff000000) |              \
 197         ((s) & 0xff000000) << 8 | ((s) & 0xff0000) << 24 |              \
 198         ((s) & 0xff00) << 40 | (s) << 56)
 199 #endif
 200
 201 #endif /* MACHINE_IS_BIG_ENDIAN */
 202
 203
 204 #if defined(MACHINE_IS_LITTLE_ENDIAN)
 205 /* replace swaps with simple assignments on little endian systems */
 206 #undef  ld_swap32
 207 #undef  st_swap32
 208 #define ld_swap32(s, d) (d = *(s))
 209 #define st_swap32(s, d) (*(d) = s)
 210 #undef  ld_swap64
 211 #undef  st_swap64
 212 #define ld_swap64(s, d) (d = *(s))
 213 #define st_swap64(s, d) (*(d) = s)
 214 #endif /* MACHINE_IS_LITTLE_ENDIAN */
 215
 216 #endif /* _CRYPTO_EDONR_BYTEORDER_H */