platform/system-selection.h

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  39
  40 #ifndef __avmplus_system_selection__
  41 #define __avmplus_system_selection__
  42
  43 // Standard operating system, CPU, word size, and endianness selection
  44 // for tier-one AVM platforms.  This file defines all the AVMSYSTEM_
  45 // names.  It would normally be included into a feature definition file.
  46
  47 // operating system
  48
  49 #ifdef UNIX
  50   #define AVMSYSTEM_UNIX 1
  51 #else
  52   #define AVMSYSTEM_UNIX 0
  53 #endif
  54 #ifdef _MAC
  55   #define AVMSYSTEM_MAC  1
  56 #else
  57   #define AVMSYSTEM_MAC  0
  58 #endif
  59 #ifdef WIN32
  60   #define AVMSYSTEM_WIN32 1
  61 #else
  62   #define AVMSYSTEM_WIN32 0
  63 #endif
  64 #ifdef __SYMBIAN32__ // defined by Symbian S60 tool chain
  65   #define AVMSYSTEM_SYMBIAN 1
  66 #else
  67   #define AVMSYSTEM_SYMBIAN 0
  68 #endif
  69
  70 #ifdef WEBOS
  71   #define AVMSYSTEM_WEBOS 1
  72 #else
  73   #define AVMSYSTEM_WEBOS 0
  74 #endif
  75
  76 // cpu, word size
  77
  78 #undef SIXTYFOURBIT
  79
  80 #if AVMSYSTEM_MAC || AVMSYSTEM_UNIX
  81
  82   #if defined(__i386__) || defined(__i386)
  83     #define AVMSYSTEM_IA32   1
  84   #else
  85     #define AVMSYSTEM_IA32   0
  86   #endif
  87
  88   #if defined(__x86_64__)
  89     #define AVMSYSTEM_AMD64  1
  90     #define SIXTYFOURBIT
  91   #else
  92     #define AVMSYSTEM_AMD64  0
  93   #endif
  94
  95   #if defined(__ppc__) || defined(__powerpc__) || (__ppc64__) || (__powerpc64__)
  96     #define AVMSYSTEM_PPC    1
  97     #if (__ppc64__) || (__powerpc64__)
  98       #define SIXTYFOURBIT
  99     #endif
 100   #else
 101     #define AVMSYSTEM_PPC    0
 102   #endif
 103
 104   #if defined(__arm__) || defined(__ARM__)
 105     #define AVMSYSTEM_ARM    1
 106   #else
 107     #define AVMSYSTEM_ARM    0
 108   #endif
 109
 110   #if defined(__sparc__) || defined(__sparc)
 111     #define AVMSYSTEM_SPARC  1
 112   #else
 113     #define AVMSYSTEM_SPARC  0
 114   #endif
 115
 116   #if defined(__mips__) || defined(__MIPS__)
 117     #define AVMSYSTEM_MIPS   1
 118   #else
 119     #define AVMSYSTEM_MIPS   0
 120   #endif
 121
 122   #if defined(__SH4__)
 123     #define AVMSYSTEM_SH4   1
 124   #else
 125     #define AVMSYSTEM_SH4   0
 126   #endif
 127
 128 #endif  // mac || unix
 129
 130 #if AVMSYSTEM_WIN32
 131
 132   #ifdef _M_X64
 133     #define AVMSYSTEM_AMD64  1
 134     #define SIXTYFOURBIT
 135   #else
 136     #define AVMSYSTEM_AMD64  0
 137   #endif
 138
 139   #if defined(_ARM_)
 140     #define AVMSYSTEM_ARM    1
 141   #else
 142     #define AVMSYSTEM_ARM    0
 143   #endif
 144
 145   #if !AVMSYSTEM_AMD64 && !AVMSYSTEM_ARM
 146     #define AVMSYSTEM_IA32 1
 147   #else
 148     #define AVMSYSTEM_IA32 0
 149   #endif
 150
 151   #define AVMSYSTEM_PPC    0
 152   #define AVMSYSTEM_SPARC  0
 153   #define AVMSYSTEM_SH4    0
 154   #define AVMSYSTEM_MIPS   0
 155
 156 #endif  // win32
 157
 158 #if AVMSYSTEM_SYMBIAN
 159
 160   #define AVMSYSTEM_PPC     0
 161   #define AVMSYSTEM_AMD64   0
 162   #define AVMSYSTEM_SPARC   0
 163   #define AVMSYSTEM_MIPS   0
 164   #define AVMSYSTEM_SH4    0
 165
 166   #if defined(__ARMCC__)
 167     #define AVMSYSTEM_ARM    1
 168   #else
 169     #define AVMSYSTEM_ARM    0
 170   #endif
 171
 172   #if !AVMSYSTEM_ARM
 173     #define AVMSYSTEM_IA32 1
 174   #else
 175     #define AVMSYSTEM_IA32 0
 176   #endif
 177
 178   #ifdef __WINSCW__
 179     #define AVMTWEAK_EPOC_EMULATOR 1
 180   #endif
 181
 182 #endif // symbian
 183
 184 #ifdef SIXTYFOURBIT
 185   #define AVMSYSTEM_32BIT 0
 186   #define AVMSYSTEM_64BIT 1
 187 #else
 188   #define AVMSYSTEM_32BIT 1
 189   #define AVMSYSTEM_64BIT 0
 190 #endif
 191
 192 #undef SIXTYFOURBIT
 193
 194 // endianness
 195
 196 #if AVMSYSTEM_IA32 || AVMSYSTEM_AMD64
 197   #define AVMSYSTEM_LITTLE_ENDIAN       1
 198   #define AVMSYSTEM_BIG_ENDIAN          0
 199 #elif AVMSYSTEM_ARM
 200   #if defined _MSC_VER
 201     #define AVMSYSTEM_LITTLE_ENDIAN     1
 202     #define AVMSYSTEM_BIG_ENDIAN        0
 203   #elif defined __GNUC__
 204     #if AVMSYSTEM_MAC && AVMSYSTEM_ARM
 205         #include <machine/endian.h>
 206         #define __BYTE_ORDER BYTE_ORDER
 207     #else
 208         #include <endian.h>
 209     #endif
 210     #if __BYTE_ORDER == LITTLE_ENDIAN
 211       #define AVMSYSTEM_LITTLE_ENDIAN   1
 212       #define AVMSYSTEM_BIG_ENDIAN      0
 213       #if __FLOAT_WORD_ORDER == BIG_ENDIAN
 214         #define AVMSYSTEM_DOUBLE_MSW_FIRST 1
 215       #endif
 216     #else
 217       #define AVMSYSTEM_LITTLE_ENDIAN   0
 218       #define AVMSYSTEM_BIG_ENDIAN      1
 219     #endif
 220   #elif defined __ARMCC__
 221     #define AVMSYSTEM_LITTLE_ENDIAN   1
 222     #define AVMSYSTEM_BIG_ENDIAN      0
 223   #endif
 224 #elif AVMSYSTEM_PPC || AVMSYSTEM_SPARC
 225   #define AVMSYSTEM_LITTLE_ENDIAN       0
 226   #define AVMSYSTEM_BIG_ENDIAN          1
 227 #elif AVMSYSTEM_MIPS || AVMSYSTEM_SH4
 228   #if defined __GNUC__
 229     #include <endian.h>
 230     #if __BYTE_ORDER == LITTLE_ENDIAN
 231       #define AVMSYSTEM_LITTLE_ENDIAN   1
 232       #define AVMSYSTEM_BIG_ENDIAN      0
 233     #else
 234       #define AVMSYSTEM_LITTLE_ENDIAN   0
 235       #define AVMSYSTEM_BIG_ENDIAN      1
 236     #endif
 237   #endif
 238 #else
 239   #error "Error in test to determine endianness"
 240 #endif
 241
 242 // unaligned access
 243
 244 // currently used only by the AVMSYSTEM_ARM case, but we include
 245 // it on all platforms to ensure consistent build system failures
 246 #include "../nanojit/njcpudetect.h"
 247
 248 #if AVMSYSTEM_IA32 || AVMSYSTEM_AMD64
 249   #define AVMSYSTEM_UNALIGNED_INT_ACCESS 1
 250   #define AVMSYSTEM_UNALIGNED_FP_ACCESS  1
 251 #elif AVMSYSTEM_ARM
 252   #if AVMSYSTEM_WEBOS
 253     // At the time of this writing (Feb 2010), Palm's webOS deliberately enables software interrupts
 254     // for all unaligned accesses, apparently in the name of promoting "clean code", making unaligned
 255     // accesses vastly slower than aligned (reportedly on the order of 1000x). Unless they change this
 256     // policy (or give us a way to change it selectively) we will consider all webOS builds not to
 257     // support unaligned access, regardless of the processor variant.
 258     #define AVMSYSTEM_UNALIGNED_INT_ACCESS 0
 259   #else
 260     //
 261     // ARM is a little complicated:
 262     //
 263     // ARMv5 (e.g. ARM926): No support for unaligned accesses.
 264     // ARMv6 (e.g. ARM1176): Optional support that must be enabled by the OS.
 265     // ARMv7 (e.g. Cortex-A8): Unaligned access support cannot be disabled; you always have it.
 266     //
 267     #if NJ_COMPILER_ARM_ARCH >= 7
 268       #define AVMSYSTEM_UNALIGNED_INT_ACCESS 1
 269     #else
 270       #define AVMSYSTEM_UNALIGNED_INT_ACCESS 0
 271     #endif
 272   #endif
 273   // VFP rules are different from int rules on ARM
 274   #define AVMSYSTEM_UNALIGNED_FP_ACCESS  0
 275 #elif AVMSYSTEM_PPC || AVMSYSTEM_SPARC || AVMSYSTEM_MIPS || AVMSYSTEM_SH4
 276   #define AVMSYSTEM_UNALIGNED_INT_ACCESS 0
 277   #define AVMSYSTEM_UNALIGNED_FP_ACCESS  0
 278 #else
 279   #error "Error in test to determine endianness"
 280 #endif
 281
 282 #ifndef AVMSYSTEM_DOUBLE_MSW_FIRST
 283   #define AVMSYSTEM_DOUBLE_MSW_FIRST 0
 284 #endif
 285
 286 #endif