disas/libvixl/vixl/globals.h

   1 // Copyright 2015, ARM Limited
   2 // All rights reserved.
   3 //
   4 // Redistribution and use in source and binary forms, with or without
   5 // modification, are permitted provided that the following conditions are met:
   6 //
   7 //   * Redistributions of source code must retain the above copyright notice,
   8 //     this list of conditions and the following disclaimer.
   9 //   * Redistributions in binary form must reproduce the above copyright notice,
  10 //     this list of conditions and the following disclaimer in the documentation
  11 //     and/or other materials provided with the distribution.
  12 //   * Neither the name of ARM Limited nor the names of its contributors may be
  13 //     used to endorse or promote products derived from this software without
  14 //     specific prior written permission.
  15 //
  16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS CONTRIBUTORS "AS IS" AND
  17 // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  18 // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  19 // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
  20 // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21 // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  22 // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  23 // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  24 // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  25 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26
  27 #ifndef VIXL_GLOBALS_H
  28 #define VIXL_GLOBALS_H
  29
  30 // Get standard C99 macros for integer types.
  31 #ifndef __STDC_CONSTANT_MACROS
  32 #define __STDC_CONSTANT_MACROS
  33 #endif
  34
  35 #ifndef __STDC_LIMIT_MACROS
  36 #define __STDC_LIMIT_MACROS
  37 #endif
  38
  39 #ifndef __STDC_FORMAT_MACROS
  40 #define __STDC_FORMAT_MACROS
  41 #endif
  42
  43 #include <stdint.h>
  44 #include <inttypes.h>
  45
  46 #include <assert.h>
  47 #include <stdarg.h>
  48 #include <stdio.h>
  49 #include <stdint.h>
  50 #include <stdlib.h>
  51 #include <stddef.h>
  52 #include "vixl/platform.h"
  53
  54
  55 typedef uint8_t byte;
  56
  57 // Type for half-precision (16 bit) floating point numbers.
  58 typedef uint16_t float16;
  59
  60 const int KBytes = 1024;
  61 const int MBytes = 1024 * KBytes;
  62
  63 #define VIXL_ABORT() \
  64     do { printf("in %s, line %i", __FILE__, __LINE__); abort(); } while (false)
  65 #ifdef VIXL_DEBUG
  66   #define VIXL_ASSERT(condition) assert(condition)
  67   #define VIXL_CHECK(condition) VIXL_ASSERT(condition)
  68   #define VIXL_UNIMPLEMENTED() \
  69     do { fprintf(stderr, "UNIMPLEMENTED\t"); VIXL_ABORT(); } while (false)
  70   #define VIXL_UNREACHABLE() \
  71     do { fprintf(stderr, "UNREACHABLE\t"); VIXL_ABORT(); } while (false)
  72 #else
  73   #define VIXL_ASSERT(condition) ((void) 0)
  74   #define VIXL_CHECK(condition) assert(condition)
  75   #define VIXL_UNIMPLEMENTED() ((void) 0)
  76   #define VIXL_UNREACHABLE() ((void) 0)
  77 #endif
  78 // This is not as powerful as template based assertions, but it is simple.
  79 // It assumes that the descriptions are unique. If this starts being a problem,
  80 // we can switch to a different implemention.
  81 #define VIXL_CONCAT(a, b) a##b
  82 #define VIXL_STATIC_ASSERT_LINE(line, condition) \
  83   typedef char VIXL_CONCAT(STATIC_ASSERT_LINE_, line)[(condition) ? 1 : -1] \
  84   __attribute__((unused))
  85 #define VIXL_STATIC_ASSERT(condition) \
  86     VIXL_STATIC_ASSERT_LINE(__LINE__, condition)
  87
  88 template <typename T1>
  89 inline void USE(T1) {}
  90
  91 template <typename T1, typename T2>
  92 inline void USE(T1, T2) {}
  93
  94 template <typename T1, typename T2, typename T3>
  95 inline void USE(T1, T2, T3) {}
  96
  97 template <typename T1, typename T2, typename T3, typename T4>
  98 inline void USE(T1, T2, T3, T4) {}
  99
 100 #define VIXL_ALIGNMENT_EXCEPTION() \
 101     do { fprintf(stderr, "ALIGNMENT EXCEPTION\t"); VIXL_ABORT(); } while (0)
 102
 103 // The clang::fallthrough attribute is used along with the Wimplicit-fallthrough
 104 // argument to annotate intentional fall-through between switch labels.
 105 // For more information please refer to:
 106 // http://clang.llvm.org/docs/AttributeReference.html#fallthrough-clang-fallthrough
 107 #ifndef __has_warning
 108   #define __has_warning(x)  0
 109 #endif
 110
 111 // Note: This option is only available for Clang. And will only be enabled for
 112 // C++11(201103L).
 113 #if __has_warning("-Wimplicit-fallthrough") && __cplusplus >= 201103L
 114   #define VIXL_FALLTHROUGH() [[clang::fallthrough]] //NOLINT
 115 #else
 116   #define VIXL_FALLTHROUGH() do {} while (0)
 117 #endif
 118
 119 #if __cplusplus >= 201103L
 120   #define VIXL_NO_RETURN  [[noreturn]] //NOLINT
 121 #else
 122   #define VIXL_NO_RETURN  __attribute__((noreturn))
 123 #endif
 124
 125 // Some functions might only be marked as "noreturn" for the DEBUG build. This
 126 // macro should be used for such cases (for more details see what
 127 // VIXL_UNREACHABLE expands to).
 128 #ifdef VIXL_DEBUG
 129   #define VIXL_DEBUG_NO_RETURN  VIXL_NO_RETURN
 130 #else
 131   #define VIXL_DEBUG_NO_RETURN
 132 #endif
 133
 134 #ifdef VIXL_INCLUDE_SIMULATOR
 135 #ifndef VIXL_GENERATE_SIMULATOR_INSTRUCTIONS_VALUE
 136   #define VIXL_GENERATE_SIMULATOR_INSTRUCTIONS_VALUE  1
 137 #endif
 138 #else
 139 #ifndef VIXL_GENERATE_SIMULATOR_INSTRUCTIONS_VALUE
 140   #define VIXL_GENERATE_SIMULATOR_INSTRUCTIONS_VALUE  0
 141 #endif
 142 #if VIXL_GENERATE_SIMULATOR_INSTRUCTIONS_VALUE
 143   #warning "Generating Simulator instructions without Simulator support."
 144 #endif
 145 #endif
 146
 147 #ifdef USE_SIMULATOR
 148   #error "Please see the release notes for USE_SIMULATOR."
 149 #endif
 150
 151 #endif  // VIXL_GLOBALS_H