include/compiler.h

   1 /*
   2  * Keep all the ugly #ifdef for system stuff here
   3  */
   4
   5 #ifndef __COMPILER_H__
   6 #define __COMPILER_H__
   7
   8 #include <stddef.h>
   9
  10 #ifdef USE_HOSTCC
  11
  12 #if defined(__BEOS__)    || \
  13     defined(__NetBSD__)  || \
  14     defined(__FreeBSD__) || \
  15     defined(__sun__)     || \
  16     defined(__APPLE__)
  17 # include <inttypes.h>
  18 #elif defined(__linux__) || defined(__WIN32__) || defined(__MINGW32__) || defined(__OpenBSD__)
  19 # include <stdint.h>
  20 #endif
  21
  22 #include <errno.h>
  23 #include <stdlib.h>
  24 #include <stdint.h>
  25 #include <stdio.h>
  26 #include <string.h>
  27
  28 #if !defined(__WIN32__) && !defined(__MINGW32__)
  29 # include <sys/mman.h>
  30 #endif
  31
  32 /* Not all systems (like Windows) has this define, and yes
  33  * we do replace/emulate mmap() on those systems ...
  34  */
  35 #ifndef MAP_FAILED
  36 # define MAP_FAILED ((void *)-1)
  37 #endif
  38
  39 #include <fcntl.h>
  40 #ifndef O_BINARY                /* should be define'd on __WIN32__ */
  41 #define O_BINARY        0
  42 #endif
  43
  44 #ifdef __linux__
  45 # include <endian.h>
  46 # include <byteswap.h>
  47 #elif defined(__MACH__) || defined(__FreeBSD__)
  48 # include <machine/endian.h>
  49 typedef unsigned long ulong;
  50 #endif
  51 #ifdef __FreeBSD__
  52 # include <sys/endian.h> /* htole32 and friends */
  53 #elif defined(__OpenBSD__)
  54 # include <endian.h>
  55 #endif
  56
  57 #include <time.h>
  58
  59 typedef uint8_t __u8;
  60 typedef uint16_t __u16;
  61 typedef uint32_t __u32;
  62 typedef unsigned int uint;
  63
  64 #define uswap_16(x) \
  65         ((((x) & 0xff00) >> 8) | \
  66          (((x) & 0x00ff) << 8))
  67 #define uswap_32(x) \
  68         ((((x) & 0xff000000) >> 24) | \
  69          (((x) & 0x00ff0000) >>  8) | \
  70          (((x) & 0x0000ff00) <<  8) | \
  71          (((x) & 0x000000ff) << 24))
  72 #define _uswap_64(x, sfx) \
  73         ((((x) & 0xff00000000000000##sfx) >> 56) | \
  74          (((x) & 0x00ff000000000000##sfx) >> 40) | \
  75          (((x) & 0x0000ff0000000000##sfx) >> 24) | \
  76          (((x) & 0x000000ff00000000##sfx) >>  8) | \
  77          (((x) & 0x00000000ff000000##sfx) <<  8) | \
  78          (((x) & 0x0000000000ff0000##sfx) << 24) | \
  79          (((x) & 0x000000000000ff00##sfx) << 40) | \
  80          (((x) & 0x00000000000000ff##sfx) << 56))
  81 #if defined(__GNUC__)
  82 # define uswap_64(x) _uswap_64(x, ull)
  83 #else
  84 # define uswap_64(x) _uswap_64(x, )
  85 #endif
  86
  87 #if defined(__OpenBSD__)
  88 #define cpu_to_le16(x)          htole16(x)
  89 #define cpu_to_le32(x)          htole32(x)
  90 #define cpu_to_le64(x)          htole64(x)
  91 #define le16_to_cpu(x)          letoh16(x)
  92 #define le32_to_cpu(x)          letoh32(x)
  93 #define le64_to_cpu(x)          letoh64(x)
  94 #define cpu_to_be16(x)          htobe16(x)
  95 #define cpu_to_be32(x)          htobe32(x)
  96 #define cpu_to_be64(x)          htobe64(x)
  97 #define be16_to_cpu(x)          betoh16(x)
  98 #define be32_to_cpu(x)          betoh32(x)
  99 #define be64_to_cpu(x)          betoh64(x)
 100 #elif __BYTE_ORDER == __LITTLE_ENDIAN
 101 # define cpu_to_le16(x)         (x)
 102 # define cpu_to_le32(x)         (x)
 103 # define cpu_to_le64(x)         (x)
 104 # define le16_to_cpu(x)         (x)
 105 # define le32_to_cpu(x)         (x)
 106 # define le64_to_cpu(x)         (x)
 107 # define cpu_to_be16(x)         uswap_16(x)
 108 # define cpu_to_be32(x)         uswap_32(x)
 109 # define cpu_to_be64(x)         uswap_64(x)
 110 # define be16_to_cpu(x)         uswap_16(x)
 111 # define be32_to_cpu(x)         uswap_32(x)
 112 # define be64_to_cpu(x)         uswap_64(x)
 113 #else
 114 # define cpu_to_le16(x)         uswap_16(x)
 115 # define cpu_to_le32(x)         uswap_32(x)
 116 # define cpu_to_le64(x)         uswap_64(x)
 117 # define le16_to_cpu(x)         uswap_16(x)
 118 # define le32_to_cpu(x)         uswap_32(x)
 119 # define le64_to_cpu(x)         uswap_64(x)
 120 # define cpu_to_be16(x)         (x)
 121 # define cpu_to_be32(x)         (x)
 122 # define cpu_to_be64(x)         (x)
 123 # define be16_to_cpu(x)         (x)
 124 # define be32_to_cpu(x)         (x)
 125 # define be64_to_cpu(x)         (x)
 126 #endif
 127
 128 #else /* !USE_HOSTCC */
 129
 130 #ifdef CONFIG_USE_STDINT
 131 /* Provided by gcc. */
 132 #include <stdint.h>
 133 #else
 134 /* Type for `void *' pointers. */
 135 typedef unsigned long int uintptr_t;
 136 #endif
 137
 138 #include <linux/string.h>
 139 #include <linux/types.h>
 140 #include <asm/byteorder.h>
 141
 142 #if __SIZEOF_LONG__ == 8
 143 # define __WORDSIZE     64
 144 #elif __SIZEOF_LONG__ == 4
 145 # define __WORDSIZE     32
 146 #else
 147 /*
 148  * Assume 32-bit for now - only newer toolchains support this feature and
 149  * this is only required for sandbox support at present.
 150  */
 151 #define __WORDSIZE      32
 152 #endif
 153
 154 #endif /* USE_HOSTCC */
 155
 156 #define likely(x)       __builtin_expect(!!(x), 1)
 157 #define unlikely(x)     __builtin_expect(!!(x), 0)
 158
 159 #endif