sdk/include/crt/mingw32/intrin.h

   1 /*
   2         Compatibility <intrin.h> header for GCC -- GCC equivalents of intrinsic
   3         Microsoft Visual C++ functions. Originally developed for the ReactOS
   4         (<http://www.reactos.org/>) and TinyKrnl (<http://www.tinykrnl.org/>)
   5         projects.
   6
   7         Copyright (c) 2006 KJK::Hyperion <hackbunny@reactos.com>
   8
   9         Permission is hereby granted, free of charge, to any person obtaining a
  10         copy of this software and associated documentation files (the "Software"),
  11         to deal in the Software without restriction, including without limitation
  12         the rights to use, copy, modify, merge, publish, distribute, sublicense,
  13         and/or sell copies of the Software, and to permit persons to whom the
  14         Software is furnished to do so, subject to the following conditions:
  15
  16         The above copyright notice and this permission notice shall be included in
  17         all copies or substantial portions of the Software.
  18
  19         THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20         IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21         FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  22         AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  23         LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  24         FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  25         DEALINGS IN THE SOFTWARE.
  26 */
  27
  28 #ifndef KJK_INTRIN_H_
  29 #define KJK_INTRIN_H_
  30
  31 #ifndef RC_INVOKED
  32
  33 #ifdef __clang__
  34 #define __INTRIN_INLINE __forceinline
  35 #else
  36 #define __ATTRIBUTE_ARTIFICIAL __attribute__((artificial))
  37 #define __INTRIN_INLINE extern __inline__ __attribute__((__always_inline__,__gnu_inline__)) __ATTRIBUTE_ARTIFICIAL
  38 #endif
  39
  40 #ifndef _SIZE_T_DEFINED
  41 #define _SIZE_T_DEFINED
  42 #ifdef _WIN64
  43   typedef unsigned __int64 size_t;
  44 #else
  45   typedef unsigned int size_t;
  46 #endif
  47 #endif
  48
  49 #ifndef _UINTPTR_T_DEFINED
  50 #define _UINTPTR_T_DEFINED
  51 #ifdef _WIN64
  52   typedef unsigned __int64 uintptr_t;
  53 #else
  54   typedef unsigned int uintptr_t;
  55 #endif
  56 #endif
  57
  58 /*
  59         FIXME: review all "memory" clobbers, add/remove to match Visual C++
  60         behavior: some "obvious" memory barriers are not present in the Visual C++
  61         implementation - e.g. __stosX; on the other hand, some memory barriers that
  62         *are* present could have been missed
  63 */
  64
  65 /*
  66         NOTE: this is a *compatibility* header. Some functions may look wrong at
  67         first, but they're only "as wrong" as they would be on Visual C++. Our
  68         priority is compatibility
  69
  70         NOTE: unlike most people who write inline asm for GCC, I didn't pull the
  71         constraints and the uses of __volatile__ out of my... hat. Do not touch
  72         them. I hate cargo cult programming
  73
  74         NOTE: be very careful with declaring "memory" clobbers. Some "obvious"
  75         barriers aren't there in Visual C++ (e.g. __stosX)
  76
  77         NOTE: review all intrinsics with a return value, add/remove __volatile__
  78         where necessary. If an intrinsic whose value is ignored generates a no-op
  79         under Visual C++, __volatile__ must be omitted; if it always generates code
  80         (for example, if it has side effects), __volatile__ must be specified. GCC
  81         will only optimize out non-volatile asm blocks with outputs, so input-only
  82         blocks are safe. Oddities such as the non-volatile 'rdmsr' are intentional
  83         and follow Visual C++ behavior
  84
  85         NOTE: on GCC 4.1.0, please use the __sync_* built-ins for barriers and
  86         atomic operations. Test the version like this:
  87
  88         #if (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) > 40100
  89                 ...
  90
  91         Pay attention to the type of barrier. Make it match with what Visual C++
  92         would use in the same case
  93 */
  94
  95 #if defined(__i386__)
  96 #include "intrin_x86.h"
  97 #elif defined(_PPC_)
  98 #include "intrin_ppc.h"
  99 #elif defined(_MIPS_)
 100 #include "intrin_mips.h"
 101 #elif defined(_M_ARM)
 102 #include "intrin_arm.h"
 103 #elif defined(__x86_64__)
 104 /* TODO: the x64 architecture shares most of the i386 intrinsics. It should be easy to support */
 105 #include "intrin_x86.h"
 106 #else
 107 #error Unsupported architecture
 108 #endif
 109
 110
 111 /*** Miscellaneous ***/
 112 /* BUGBUG: only good for use in macros. Cannot be taken the address of */
 113 #define __noop(...) ((void)0)
 114
 115 #define __assume(x) if (!(x)) __builtin_unreachable()
 116
 117 #endif
 118
 119 #endif
 120
 121 /* EOF */