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__)
  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
  52 typedef uint8_t __u8;
  53 typedef uint16_t __u16;
  54 typedef uint32_t __u32;
  55 typedef unsigned int uint;
  56
  57 #define uswap_16(x) \
  58         ((((x) & 0xff00) >> 8) | \
  59          (((x) & 0x00ff) << 8))
  60 #define uswap_32(x) \
  61         ((((x) & 0xff000000) >> 24) | \
  62          (((x) & 0x00ff0000) >>  8) | \
  63          (((x) & 0x0000ff00) <<  8) | \
  64          (((x) & 0x000000ff) << 24))
  65 #define _uswap_64(x, sfx) \
  66         ((((x) & 0xff00000000000000##sfx) >> 56) | \
  67          (((x) & 0x00ff000000000000##sfx) >> 40) | \
  68          (((x) & 0x0000ff0000000000##sfx) >> 24) | \
  69          (((x) & 0x000000ff00000000##sfx) >>  8) | \
  70          (((x) & 0x00000000ff000000##sfx) <<  8) | \
  71          (((x) & 0x0000000000ff0000##sfx) << 24) | \
  72          (((x) & 0x000000000000ff00##sfx) << 40) | \
  73          (((x) & 0x00000000000000ff##sfx) << 56))
  74 #if defined(__GNUC__)
  75 # define uswap_64(x) _uswap_64(x, ull)
  76 #else
  77 # define uswap_64(x) _uswap_64(x, )
  78 #endif
  79
  80 #if __BYTE_ORDER == __LITTLE_ENDIAN
  81 # define cpu_to_le16(x)         (x)
  82 # define cpu_to_le32(x)         (x)
  83 # define cpu_to_le64(x)         (x)
  84 # define le16_to_cpu(x)         (x)
  85 # define le32_to_cpu(x)         (x)
  86 # define le64_to_cpu(x)         (x)
  87 # define cpu_to_be16(x)         uswap_16(x)
  88 # define cpu_to_be32(x)         uswap_32(x)
  89 # define cpu_to_be64(x)         uswap_64(x)
  90 # define be16_to_cpu(x)         uswap_16(x)
  91 # define be32_to_cpu(x)         uswap_32(x)
  92 # define be64_to_cpu(x)         uswap_64(x)
  93 #else
  94 # define cpu_to_le16(x)         uswap_16(x)
  95 # define cpu_to_le32(x)         uswap_32(x)
  96 # define cpu_to_le64(x)         uswap_64(x)
  97 # define le16_to_cpu(x)         uswap_16(x)
  98 # define le32_to_cpu(x)         uswap_32(x)
  99 # define le64_to_cpu(x)         uswap_64(x)
 100 # define cpu_to_be16(x)         (x)
 101 # define cpu_to_be32(x)         (x)
 102 # define cpu_to_be64(x)         (x)
 103 # define be16_to_cpu(x)         (x)
 104 # define be32_to_cpu(x)         (x)
 105 # define be64_to_cpu(x)         (x)
 106 #endif
 107
 108 #else /* !USE_HOSTCC */
 109
 110 #include <linux/string.h>
 111 #include <linux/types.h>
 112 #include <asm/byteorder.h>
 113
 114 #if __SIZEOF_LONG__ == 8
 115 # define __WORDSIZE     64
 116 #elif __SIZEOF_LONG__ == 4
 117 # define __WORDSIZE     32
 118 #else
 119 /*
 120  * Assume 32-bit for now - only newer toolchains support this feature and
 121  * this is only required for sandbox support at present.
 122  */
 123 #define __WORDSIZE      32
 124 #endif
 125
 126 /* Types for `void *' pointers. */
 127 #if __WORDSIZE == 64
 128 typedef unsigned long int       uintptr_t;
 129 #elif __WORDSIZE == 32
 130 typedef unsigned int            uintptr_t;
 131 #else
 132 #error "__WORDSIZE has unexpected value"
 133 #endif
 134
 135 #endif
 136
 137 /* compiler options */
 138 #define uninitialized_var(x)            x = x
 139
 140 #define likely(x)       __builtin_expect(!!(x), 1)
 141 #define unlikely(x)     __builtin_expect(!!(x), 0)
 142
 143 #endif