hphp/runtime/vm/jit/code-gen-helpers.h

   1 /*
   2    +----------------------------------------------------------------------+
   3    | HipHop for PHP                                                       |
   4    +----------------------------------------------------------------------+
   5    | Copyright (c) 2010-2014 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_VM_CODEGENHELPERS_H_
  18 #define incl_HPHP_VM_CODEGENHELPERS_H_
  19
  20 #include "hphp/runtime/vm/jit/type.h"
  21 #include "hphp/runtime/vm/jit/phys-reg.h"
  22 #include "hphp/runtime/vm/jit/vasm-x64.h"
  23 #include "hphp/util/abi-cxx.h"
  24
  25 namespace HPHP { namespace jit {
  26
  27 /*
  28  * SaveFP uses rVmFp, as usual. SavePC requires the caller to have
  29  * placed the PC offset of the instruction about to be executed in
  30  * rdi.
  31  */
  32 enum class RegSaveFlags {
  33   None = 0,
  34   SaveFP = 1,
  35   SavePC = 2
  36 };
  37 inline RegSaveFlags operator|(const RegSaveFlags& l, const RegSaveFlags& r) {
  38   return RegSaveFlags(int(r) | int(l));
  39 }
  40 inline RegSaveFlags operator&(const RegSaveFlags& l, const RegSaveFlags& r) {
  41   return RegSaveFlags(int(r) & int(l));
  42 }
  43 inline RegSaveFlags operator~(const RegSaveFlags& f) {
  44   return RegSaveFlags(~int(f));
  45 }
  46
  47 template <class T, class F>
  48 Vreg cond(Vout& v, ConditionCode cc, Vreg sf, Vreg dst, T t, F f) {
  49   auto fblock = v.makeBlock();
  50   auto tblock = v.makeBlock();
  51   auto done = v.makeBlock();
  52   v << jcc{cc, sf, {fblock, tblock}};
  53   v = tblock;
  54   auto treg = t(v);
  55   v << phijmp{done, v.makeTuple(VregList{treg})};
  56   v = fblock;
  57   auto freg = f(v);
  58   v << phijmp{done, v.makeTuple(VregList{freg})};
  59   v = done;
  60   v << phidef{v.makeTuple(VregList{dst})};
  61   return dst;
  62 }
  63
  64 }}
  65
  66 #endif