hphp/runtime/vm/jit/code-gen-helpers-inl.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 #include "hphp/runtime/base/header-kind.h"
  18
  19 #include "hphp/runtime/vm/jit/vasm-gen.h"
  20 #include "hphp/runtime/vm/jit/vasm-instr.h"
  21
  22 #include "hphp/util/asm-x64.h"
  23
  24 namespace HPHP { namespace jit {
  25
  26 ///////////////////////////////////////////////////////////////////////////////
  27
  28 inline void emitTestTVType(Vout& v, Vreg sf, Immed s0, Vreg s1) {
  29   v << testbi{s0, s1, sf};
  30 }
  31
  32 inline void emitTestTVType(Vout& v, Vreg sf, Immed s0, Vptr s1) {
  33   v << testbim{s0, s1, sf};
  34 }
  35
  36 inline void emitCmpTVType(Vout& v, Vreg sf, Immed s0, Vptr s1) {
  37   v << cmpbim{s0, s1, sf};
  38 }
  39
  40 inline void emitCmpTVType(Vout& v, Vreg sf, Immed s0, Vreg s1) {
  41   v << cmpbi{s0, s1, sf};
  42 }
  43
  44 ///////////////////////////////////////////////////////////////////////////////
  45
  46 template<class Destroy>
  47 void emitDecRefWork(Vout& v, Vout& vcold, Vreg data,
  48                     Destroy destroy, bool unlikelyDestroy) {
  49   auto const sf = v.makeReg();
  50   v << cmplim{1, data[FAST_REFCOUNT_OFFSET], sf};
  51   ifThenElse(
  52     v, vcold, CC_E, sf,
  53     destroy,
  54     [&] (Vout& v) {
  55       // If it's not static, actually reduce the reference count.  This does
  56       // another branch using the same status flags from the cmplim above.
  57       ifThen(v, CC_NL, sf, [&] (Vout& v) { emitDecRef(v, data); });
  58     },
  59     unlikelyDestroy
  60   );
  61 }
  62
  63 ///////////////////////////////////////////////////////////////////////////////
  64
  65 }}