hphp/runtime/vm/jit/align-internal.h

   1 /*
   2    +----------------------------------------------------------------------+
   3    | HipHop for PHP                                                       |
   4    +----------------------------------------------------------------------+
   5    | Copyright (c) 2010-2016 Facebook, Inc. (http://www.facebook.com)     |
   6    +----------------------------------------------------------------------+
   7    | This source file is subject to version 3.01 of the PHP license,      |
   8    | that is bundled with this package in the file LICENSE, and is        |
   9    | available through the world-wide-web at the following url:           |
  10    | http://www.php.net/license/3_01.txt                                  |
  11    | If you did not receive a copy of the PHP license and are unable to   |
  12    | obtain it through the world-wide-web, please send a note to          |
  13    | license@php.net so we can mail you a copy immediately.               |
  14    +----------------------------------------------------------------------+
  15 */
  16
  17 #ifndef incl_HPHP_JIT_ALIGN_INTERNAL_H_
  18 #define incl_HPHP_JIT_ALIGN_INTERNAL_H_
  19
  20 #include "hphp/runtime/vm/jit/alignment.h"
  21 #include "hphp/runtime/vm/jit/cg-meta.h"
  22 #include "hphp/runtime/vm/jit/types.h"
  23
  24 #include "hphp/util/data-block.h"
  25
  26 namespace HPHP { namespace jit {
  27
  28 ///////////////////////////////////////////////////////////////////////////////
  29
  30 template <class AImpl>
  31 bool is_aligned(TCA frontier, Alignment alignment);
  32
  33 template <class AImpl>
  34 void align(CodeBlock& cb, CGMeta* meta,
  35            Alignment alignment, AlignContext context);
  36
  37 /*
  38  * Used in align-*.cpp to generate an AlignInfo table within an arch namespace.
  39  */
  40 #define DECLARE_ALIGN_TABLE(table)                                            \
  41   constexpr AlignInfo table[] = {                                             \
  42     { cache_line_size(),  cache_line_size(),      0 }, /* CacheLine */        \
  43     { cache_line_size(),  cache_line_size() / 2,  0 }, /* CacheLineRoundUp */ \
  44     { kJmpTargetAlign,    kJmpTargetAlign,        0 }, /* JmpTarget */        \
  45     { cache_line_size(),  smashableMovqLen(),     kSmashMovqImmOff },         \
  46     { cache_line_size(),  smashableCmpqLen(),     kSmashCmpqImmOff },         \
  47     { cache_line_size(),  smashableCallLen(),     0 },                        \
  48     { cache_line_size(),  smashableJmpLen(),      0 },                        \
  49     { cache_line_size(),  smashableJccLen(),      0 },                        \
  50     /*
  51      * Three entries for SmashJccAndJmp, one for each half and one for both
  52      * together.  The implementation below relies on this being the last
  53      */                                                                       \
  54     { cache_line_size(),  smashableJccLen(),  0 },                            \
  55     { cache_line_size(),  smashableJccLen() +                                 \
  56                           smashableJmpLen(),  smashableJccLen() },            \
  57     { cache_line_size(),  smashableJccLen() +                                 \
  58                           smashableJmpLen(),  0 }                             \
  59   }
  60
  61 #define DEFINE_ALIGN_TABLE(table) \
  62   constexpr AlignInfo table[kNumAlignments + 2]
  63
  64
  65 ///////////////////////////////////////////////////////////////////////////////
  66
  67 }}
  68
  69 #include "hphp/runtime/vm/jit/align-internal-inl.h"
  70
  71 #endif